ASCO Pressure and Temperature Switch SELECTION GUIDE and INDEX

Transcription

1 ACO ressure and Temperature witch ELECTION GUIDE and INDEX witches Type et oint Reset oint Enclosure Ranges ages REURE J-ERIE Miniature ressure witches with Non- et oints ressure Non- Fixed ealed H-ERIE Miniature ressure witches with et oints ressure Fixed, Open Frame, urpose, ERIE witches for Vacuum psig with Open Frame,Type 1 or Type 4 Enclosures Vacuum, Compound, ressure Fixed, Open Frame, urpose, Vacuum ERIE witches for Vacuum psig, or Differential with Type 1, Type 4 or Type 7, 9 Enclosures ressure, Vacuum, Differential, Combustion In. of W.C. Fixed,, Manual Reset urpose,, Explosion-roof Vacuum TEMERATURE -ERIE witches for -60 through 510 F with Open Frame,Type 1 or Type 4 Enclosures Temperature Fixed, Open Frame, urpose, F ERIE witches for -60 through 640 F with Type 1, Type 4 or Type 7, 9 Enclosures Temperature Fixed,, Manual Reset urpose,, Explosion-roof F Options, Definitions and Compatibility Table...ages 34 through Inside Back Cover 1

2 J-ERIE Miniature ressure witches Low-Cost witches with Non- et oints Features: Tamperproof, factory-set, non-adjustable set points. Fixed deadband. Environmentally sealed against dust, water, oil and salt spray, e.g., for off-highway equipment. Vented construction for stable set points throughout operating range. Vibration and shock resistant to 10 G s. recision electrical snap-action switch. Description: J-eries miniature pressure switches have factory-set non-adjustable set points and fixed deadband, with diaphragm/piston sensor. J-eries switches are CA approved and UL listed under Industrial Control Equipment. J-eries switches are sealed with specially compounded epoxy that maintains its sealing integrity from -40 to 250 F. roof pressure: 250 psig. (Consult factory for higher pressures). rocess connection: tandard: 1/8 NT Ext, 1/8 NT Int, 1/4 NT Ext. Optional: 1/4 NT Int (eighth digit 3 ). tandard Electrical Ratings 5 Amp Res., 125 VAC 5 Amp Res., 250 VAC 3 Amp Res., 28 VDC & % tandard Temperature Ratings Ambient: -4 F (-20 C) to 140 F (60 C) Fluid: -4 F (-20 C) to 180 F (82 C) Dimensions (inches) J-eries ressure With Terminal crew Connections 1 INCH DIA. 3.5 With Lead Wires 1 INCH DIA Wetted Materials (rocess Connection & Diaphragm) tandard: Brass and Buna N Optional rocess Connections: 316 (sixth digit 4 ) Carbon steel (sixth digit 6 ) Optional Diaphragms: Viton (seventh digit 2 ) Neoprene (seventh digit 3 ) Ethylene propylene (seventh digit 6 ) Fluorosilicone (seventh digit 7 ) 1/8 NT INTERNAL, 1/8 NT EXTERNAL OR 1/4 EXTERNAL witch Options Gold contacts for low power circuits: Add uffix Tight deadband, 25-50% reduction: Add uffix T 11 Amp Res., 125 VAC contacts: Add uffix Y 2

3 4 123 How to elect and Order ACO J-eries switches are a single switch and transducer assembly. How to elect 1. elect type of switch (normally open, normally closed or DT and screw terminal or wire leads). 2. elect desired set point for either decreasing pressure or increasing pressure. 3. elect desired process connection. How to Order imply order the selected J-eries pressure switch by catalog number, e.g., JB67A218A describes a normally open, screw terminal pressure switch with set point decreasing of 6.5 psig and set point increasing of 8.5 psig, 1/8 NT external brass process connection and Buna N diaphragm. Options Add appropriate suffix or change appropriate digit in catalog number for desired option, e.g., JB67A2 2 8A describes a normally open, screw terminal pressure switch with optional viton diaphragm (seventh digit 2 ) and gold contact snap switch (suffix ). Decreasing ressure Increasing ressure Mfg. et oint Tolerance 1/8 NT External rocess Connection 1/4 NT External rocess Connection Normally open, screw terminals, Brass and Buna N JB67A218A JB67A214A JB57A218A JB57A214A JB47A218A JB47A214A JB37A218A JB37A214A JB27A218A JB27A214A JB17A218A JB17A214A JC37A218A JC37A214A JC27A218A JC27A214A JC17A218A JC17A214A Normally open, 18 lead wires, Brass and Buna N JB68A218A JB68A214A JB58A218A JB58A214A JB48A218A JB48A214A JB38A218A JB38A214A JB28A218A JB28A214A JB18A218A JB18A214A JC38A218A JC38A214A JC28A218A JC28A214A JC18A218A JC18A214A Normally closed, screw terminals, Brass and Buna N JB67A218B JB67A214B JB57A218B JB57A214B JB47A218B JB47A214B JB37A218B JB37A214B JB27A218B JB27A214B JB17A218B JB17A214B JC37A218B JC37A214B JC27A218B JC27A214B JC17A218B JC17A214B Normally closed, 18 lead wires, Brass and Buna N /8 NT Internal rocess Connection JB68A218B JB68A214B JB68A215B JB58A218B JB58A214B JB58A215B JB48A218B JB48A214B JB48A215B JB38A218B JB38A214B JB38A215B JB28A218B JB28A214B JB28A215B JB18A218B JB18A214B JB18A215B JC38A218B JC38A214B JC38A215B JC28A218B JC28A214B JC28A215B JC18A218B JC18A214B JC18A215B DT (Form C contact), 18 lead wires, Brass and Buna N elect J-eries pressure switch below et oint JB68A218C JB58A218C JB48A218C JB38A218C JB28A218C JB18A218C JC38A218C JC28A218C JC18A218C JB68A214C JB58A214C JB48A214C JB38A214C JB28A214C JB18A214C JC38A214C JC28A214C JC18A214C Values shown are nominal. value is difference between the increasing and decreasing set points. May be used for panel or bracket mounting. JB67A215A JB57A215A JB47A215A JB37A215A JB27A215A JB17A215A JC37A215A JC27A215A JC17A215A JB68A215A JB58A215A JB48A215A JB38A215A JB28A215A JB18A215A JC38A215A JC28A215A JC18A215A JB67A215B JB57A215B JB47A215B JB37A215B JB27A215B JB17A215B JC37A215B JC27A215B JC17A215B JB68A215C JB58A215C JB48A215C JB38A215C JB28A215C JB18A215C JC38A215C JC28A215C JC18A215C 3

4 H-ERIE Miniature ressure witches Low-Cost witches with et oints Features: Field adjustable set points. Fixed deadband. Choice of open frame type, general purpose or watetight enclosure. mall size. Mounts in any position. Rugged and vibration resistant, e.g., for compressors. Visual adjustment scales in psig and bars. Description: H-eries miniature pressure switches have field adjustable set points and fixed deadband, with diaphragm/piston sensor. They are available in open frame construction, Type 1 general purpose or Type 4 watertight enclosures. The resilient diaphragm/piston construction helps provide long life and maintains set point repeatability despite environmental temperature variations. The full size electical switch is a precision UL listed, snap-action type. H-eries switches are CA approved and are UL listed under Industrial Control Equipment. roof pressure: 250 psig. (Consult factory for higher pressures). rocess connection: tandard: 1/8 NT Ext, 1/8 NT Int, 1/4 NT Ext. Optional: 1/4 NT Int (eighth digit 3 ). tandard Electrical Ratings 15 Amp Res., 125 VAC 10 Amp Res., 250 VAC 1/8 H, 125 VAC 1/4 H, 250 VAC 1/2 Amp Res., 125 VDC 1/4 Amp Res., 250 VDC 1 ^ % 1 Open frame construction, UL recognized component. NO C NC DT Wetted Materials (rocess Connection & Diaphragm) tandard: Brass and Buna N Optional rocess Connections: 316 (sixth digit 4 ) Carbon steel (sixth digit 6 ) Optional Diaphragms: Viton (seventh digit 2 ) Neoprene (seventh digit 3 ) Ethylene propylene (seventh digit 6 ) Fluorosilicone (seventh digit 7 ) tandard Temperature Ratings Ambient: -4 F (-20 C) to 140 F (60 C) Fluid: -4 F (-20 C) to 180 F (82 C) witch Options ee page 34 for optional snap switches. 4

5 4 123 How to elect and Order ACO H-eries switches are a single switch and transducer assembly. How to elect 1. elect type of switch (open frame, general purpose or watertight).. 2. elect the adjustable operating range based on the desired actuation pressure. 3. elect desired process connection. How to Order imply order the selected H-eries pressure switch by catalog number, e.g., HB46A218 describes an open frame pressure switch with adjustable operating range of 4 to 12 psig, 1/8 NT external brass process connection and Buna N diaphragm. Options Add appropriate suffix or change appropriate digit in catalog number for desired option, e.g., HB46A2 2 8 describes an open frame pressure switch with optional viton diaphragm (seventh digit 2 ) and gold contact snap switch (suffix ). elect H-eries pressure switch below Fixed At 1/8 NT External rocess Connection Operating Range 1 Open frame construction HB46A HB36A HB26A HB16A HC26A HC16A218 Type 1 - purpose enclosure HB40A HB30A HB20A HB10A HC20A HC10A218 Type 4 - enclosure DT (Form C Contact), Brass and Buna N HB41A218 HB31A218 HB21A218 HB11A218 HC21A218 HC11A218 1/4 NT External rocess Connection HB46A214 HB36A214 HB26A214 HB16A214 HC26A214 HC16A214 HB40A214 HB30A214 HB20A214 HB10A214 HC20A214 HC10A214 HB41A214 HB31A214 HB21A214 HB11A214 HC21A214 HC11A214 1 Values shown are nominal. 2 May be used for panel or bracket mounting. 1/8 NT Internal rocess Connection 2 HB46A215 HB36A215 HB26A215 HB16A215 HC26A215 HC16A215 HB40A215 HB30A215 HB20A215 HB10A215 HC20A215 HC10A215 HB41A215 HB31A215 HB21A215 HB11A215 HC21A215 HC11A215 Dimensions (inches) H-eries ressure urpose Enclosure Open Frame Enclosure /2NT /8 KNOCKOUT BOTH IDE /8 NT INTERNAL 1.0 1/8 NT INTERNAL 1/8 NT EXTERNAL OR 1/4 EXTERNAL 1/8 NT INTERNAL 5

6 H-ERIE Miniature ressure witches uffix : Low-Cost witches with et oints and Features: Field adjustable set points. Limited adjustable deadband. Choice of open frame type, general purpose or watetight enclosure. mall size. Mounts in any position. Rugged and vibration resistant, e.g., for compressors. Visual adjustment scales in psig and bars. tandard Ratings and Wetted Materials (ee page 4) Dimensions (ee page 5) 6 How to elect and Order ACO H-eries uffix switches are a single switch and transducer assembly. How to elect 1. elect type of switch enclosure (open frame, general purpose or watertight). 2. elect the adjustable operating range based on the desired actuation pressure and desired deadband (reactuation) pressure. 3. elect desired process connection. How to Order imply order the selected H-eries uffix pressure switch by catalog number, e.g., HB46A218 describes an open frame H-eries uffix pressure switch with adjustable operating range of 4 to 12 psig and adjustable deadband at mid-range of 1.5 to 3.5 psig, 1/8 NT external brass process connection and Buna N diaphragm. Options (ee page 4) Change appropriate digit in catalog number for desired option, e.g., HB46A2 2 8 describes an open frame pressure switch with adjustable operating range and deadband with optional viton diaphragm (seventh digit 2 ). Operating Range At 1 From/To DT (Form C Contact), Brass and Buna N 1/8 NT External rocess Connection 1/4 NT External rocess Connection Open frame construction HB46A218 HB46A HB36A218 HB36A HB26A218 HB26A HB16A218 HB16A HC26A218 HC26A HC16A218 HC16A214 Type 1 - purpose enclosure HB40A HB30A HB20A HB10A HC20A HC10A218 Type 4 - enclosure elect H-eries uffix switch below HB41A218 HB31A218 HB21A218 HB11A218 HC21A218 HC11A218 HB40A214 HB30A214 HB20A214 HB10A214 HC20A214 HC10A214 HB41A214 HB31A214 HB21A214 HB11A214 HC21A214 HC11A214 1 Values shown are nominal. 2 May be used for panel or bracket mounting. 1/8 NT Internal rocess Connection 2 HB46A215 HB36A215 HB26A215 HB16A215 HC26A215 HC16A215 HB40A215 HB30A215 HB20A215 HB10A215 HC20A215 HC10A215 HB41A215 HB31A215 HB21A215 HB11A215 HC21A215 HC11A215

7 4 123 uffix L: Lowest-Cost witches with et oints (Open Frame Construction) Features: Low cost for OEM applications. Miniature size. Wide selection of adjustable ranges. Fixed deadband. Resilient diaphragm/piston sensor for long life. recision single-pole, double-throw snap switch with quick-connect 1/4 spade terminals. tandard Ratings and Wetted Materials (ee page 4) How to elect and Order ACO H-eries uffix L switches are a single switch and transducer assembly. How to elect 1. elect the adjustable operating range based on the desired actuation pressure. 2. elect desired process connection. How to Order imply order the selected H-eries uffix L pressure switch by catalog number, e.g., HB46A218L describes an open frame pressure switch with adjustable operating range of 4 to 12 psig, 1/8 NT external brass process connection and Buna N diaphragm. Options (ee page 4) Change appropriate digit in catalog number for desired option, e.g., HB46A2 2 8L describes an open frame pressure switch with adjustable operating range and optional viton diaphragm (seventh digit 2 ). Note: Optional snap switches not available on suffix L units. Dimensions (inches) Operating Range elect H-eries uffix L switch below Fixed At /8 NT External rocess Connection 1/4 NT External rocess Connection 3.4 DT (Form C Contact), Brass and Buna N HB46A218L HB36A218L HB26A218L HB16A218L HC26A218L HC16A218L HB46A214L HB36A214L HB26A214L HB16A214L HC26A214L HC16A214L 1 Values shown are nominal. 2 May be used for panel or bracket mounting. 1/8 NT Internal rocess Connection 2 HB46A215L HB36A215L HB26A215L HB16A215L HC26A215L HC16A215L 7

8 -ERIE ressure witches witches for Vacuum through 6000 psig with et oints and Fixed or Features: et point repeatability, +1% of operating range. All wiring terminals, adjustments and visual scales are accessible from the front of the switch. Choice of open frame type, general purpose or watertight enclosure. Choice of fixed, limited-adjustable or full-range adjustable deadband. Choice of single or two-stage units. Compact size. Mounts in any position. Rugged and vibration resistant; e.g., for compressors. Visual adjustment scales in psig and bars. Wide selection of transducer wetted materials suitable for air, water, oil or corrosive fluids. Mix and match switch and transducer components for increased stock flexibility or to change pressure ranges in field. Description: ACO -eries pressure switches consist of an open frame or enclosure protected switch unit and a transducer unit. They can be ordered separately for customer stocking and/or field assembly or as a complete factory-assembled unit. witch -eries pressure switch units incorporate the unique ACO TRI-OINT alternating fulcrum balance plate to control the operation of one or more electrical snapaction swtiches. The electrical snap-action switch together with the adjusting mechanism is a fully-tested, self-contained subassembly. Transducer Transducer unit incorporates a diaphragm/piston type pressure sensor, and is also a fully-tested, self-contained subassembly. Operation When pressure is applied to the transducer it is converted into movement of the piston. This piston movement is then used to control the operation of the electrical snap-action switch in the switch unit. Options (ee pages 34-35) tandard Electrical Ratings A, B, C 1 eries 15 Amp Res., 125 VAC 10 Amp Res., 250 VAC 1/8 H, 125 VAC 1/4 H, 250 VAC 1/2 Amp Res., 125 VDC 1/4 Amp Res., 250 VDC G eries 15 Amp Res., 125 VAC 10 Amp Res., 250 VAC 1/8 H, 125 VAC 2 ^ % 1/4 H, 250 VAC 3 1 C eries, UL recognized component, rated 10 Amp Res., 125/250 VAC; 1/3 H 125/250 VAC. 2 Open frame construction, UL recognized component. 3 FM listed for air flow interlocking service. tandard Temperature Ratings DT Ambient: -4 F (-20 C) to 122 F (50 C) Fluid: For Buna N or Neoprene Diaphragm -4 F (-20 C) to 180 F (82 C) For Viton Diaphragm -4 F (-20 C) to 250 F (121 C) For 316 Diaphragm -50 F (-45 C) to 300 F (149 C) For Nylon Transducers -4 F (-20 C) to 180 F (82 C) NO C NC # 8

9 4 123 Enclosures ACO TRI-OINT switches are available in either a general purpose or watertight enclosure, in addition to open frame construction. These enclosed units are made in accordance with NEMA and UL standards. These standards define the protection level an enclosure gives and the tests it must pass to meet a particular design. urpose Type 1. These enclosures are designed for indoor use to protect personnel from accidental contact with the equipment. -eries general purpose enclosures are painted, zinc-coated Dimensions (inches) steel and have a 7/8 diameter hole at the top for electrical entry. Type 4. and dust-tight enclosures are intended for use indoors and outdoors to protect the enclosed equipment against splashing or falling water, windblown dust and water, hose directed water, and severe external condensation. -eries watertight switch enclosures are epoxy-painted, zinccoated steel with a 1/2 conduit hub in the side of the lower housing for electrical entry. (For optional 316 watertight enclosure see page 13.) -eries ressure (Mounting brackets optional) Open Frame A and C witch Units with Transducer Unit Open Frame B and G witch Units with Transducer Unit DIA HOLE FOR MOUNTING WITH #10 (.190 DIA.) CREW (2 LACE) /4 OR 1/2 NT DIA HOLE FOR MOUNTING WITH #10 (.190 DIA.) CREW (2 LACE) /4 OR 1/2 NT DIA. HOLE FOR MOUNTING WITH #10 (.190 DIA.) CREW (2 LACE).08 Type 1 urpose witch Unit with Transducer Unit Type 4 witch Unit with Transducer Unit /8 DIA. HOLE FOR 1/2 CONDUIT CONNECTION.223 DIA. HOLE FOR MOUNTING WITH #10 (.190 DIA.) CREW (2 LACE) ADDITIONAL ACING REQUIRED FOR REMOVAL OF COVER /2 NT CONDUIT CONNECTION /4 OR 1/2 NT DIA. HOLE FOR MOUNTING WITH #10 (.190 DIA.) CREW (2 LACE) /4 OR 1/2 NT.233 DIA. HOLE FOR MOUNTING WITH #10 (.190 DIA.) CREW (2 LACE).280 DIA. HOLE (2 LACE)

10 -ERIE ressure witches How to elect and Order ACO -eries switches consist of two components, the switch unit and the transducer unit. How to elect 1. elect the adjustable operating range based on desired actuation pressure. 2. Check that proof pressure is sufficient. 3. Read across and select the desired -eries switch unit with the proper enclosure. 4. Continue across and select a matching transducer unit compatible with the fluid. urpose Enclosure A witch Unit elect -eries pressure switch B witch Unit Enclosure ingle-tage units allow independent adjustment of the set and reset points over the full operating range of the switch. The minimum difference between set and reset points is the deadband listed below; the maximum difference is the full range of the switch. Open Frame ingle-tage Fixed units have an adjustable set point and a non-adjustable automatic reset point. Open Frame pecifications Fixed Operating Range roof ressure Maximum Full cale Minimum At (In W.C.) 1 Open Frame urpose Enclosure Fixed At 1 Open Frame urpose Enclosure 10 Vacuum 0-30 Hg Compound 30 Hg - 14 psig ressure Hg 6 Hg A36A A26A A36A A26A A36A A26A A16A A16A A16A A16A A16A A26A A16A A26A A16A A16A A30A A20A A30A A20A A30A A20A A10A A10A A10A A10A A10A A20A A10A A20A A10A A10A A31B A21B A31B A21B A31B A21B A11B A11B A11B A11B A11B A21B A11B A21B A11B A11B 1 Hg 1 Hg All switch units above are in stock for immediate delivery. Values shown are nominal. 2 Rated proof pressure on RF10A71 is 150 psig and on RG10A71 is 300 psig B36A B26A B46A B36A B26A B36A B26A B16A B16A B16A B16A B16A B26A B16A B26A B16A B16A B30A B20A B40A B30A B20A B30A B20A B10A B10A B10A B10A B10A B20A B10A B20A B10A B10A B31B B21B B41B B31B B21B B31B B21B B11B B11B B11B B11B B11B B21B B11B B21B B11B B11B

11 4 123 How to Order Factory assembled imply order the switch and transducer unit by catalog number joined by a slash (/), e.g., A36A/RD30A11. Field assembled imply order the switch and transducer units separately by individual catalog number, e.g., one A36A and one RD30A11. Options Add appropriate suffix for desired option or accessory (see pages 34-35). Important Note: The third digit of each of the catalog numbers must be identical, e.g., A 3 6A and RD 3 0A11. elect transducer unit below A, B, or C unit below C witch Unit Two-tage Fixed units consist of two separate snap-action switches, each with an independently adjustable set point and non-adjustable reset point. The difference between the set and reset points of each switch is the deadband listed below; the minimum difference between the set points of the two switches is the separation. Two-tage Fixed Open Frame tandard connection is 1/4 NT (optional 1/2 NT add suffix B to catalog number) Transducer Unit These guage pressure type transducers provide for one pressure connection in the bottom of the transducer. They are diaphragm/piston type transducers using an elastomer in contact with the fluid, backed by a piston cylinder. This allows high sensitivity for low pressures and strength for high pressures. Transducer Units Fixed At 1 eparation Maximum Full cale Minimum At 1 Open Frame urpose Enclosure Air or Gas 2 Nylon & Buna N Air, Oil or Gas Aluminum & Buna N Water, Air, Oil or Gas Brass & Buna N Corrosive Fluids All & Viton Hg 3 Hg C36A C30A C31B RV34A11 RV34A21 RV34A Hg 6 Hg C26A C20A C21B RV24A11 RV24A21 RV24A C36A C26A C36A C26A C16A C16A C16A C16A C16A C26A C16A C26A C16A C16A C30A C20A C30A C20A C10A C10A C10A C10A C10A C20A C10A C20A C10A C10A -- C31B C21B C31B C21B C11B C11B C11B C11B C11B C21B C11B C21B C11B C11B RD40A71 RD30A71 RD20A71 RE20A71 RE10A71 RF10A71 RG10A71 RD40A11 RD30A11 RD20A11 RE20A11 RE10A11 RF10A11 RG10A11 RH10A11 RJ10A11 RD40A21 RD30A21 RD20A21 RE20A21 RE10A21 RF10A21 RG10A21 RH10A21 RJ10A21 RL20A21 RL10A21 RN20B21 RN10B21 RE30A44 RE20A44 RE10A44 RF10A44 RG10A44 RH10A44 RJ10A44 RD40A42 RD30A42 RD20A42 RE20A42 RE10A42 RF10A42 RG10A42 RH10A42 RJ10A42 RL20A42 RL10A42 RN20B42 RN10B42 RQ10B42 All switch units and transducer units above are in stock for immediate delivery transducer deadbands are approx. 50% greater than listed. 4 Transducers ending in 32 have 303 process connections, not

12 -ERIE ressure witches How to elect and Order ACO -eries switches consist of two components, the switch unit and the transducer unit. How to elect 1. elect the adjustable operating range based on desired actuation pressure. 2. Check that rated proof pressure is sufficient. 3. Read across and select the desired -eries switch unit with the proper enclosure. 4. Continue across and select a matching transducer unit compatible with the fluid. G witch Unit How to Order Factory assembled imply order the switch and transducer unit by catalog number joined by a slash (/), e.g., G36A/RV34A11. Field assembled imply order the switch and transducer units separately by individual catalog number, e.g., one G36A and one RV34A11. Options Add appropriate suffix for desired option (see pages 34-35). Important Note: The third digit of each of the catalog numbers must be identical, e.g., G 3 6A and RV 3 4A11. elect -eries switch unit and transducer unit below Transducer Unit Limited units have an adjustable set point and use a special snap-action switch that varies the deadband within the limits listed below. These guage pressure type transducers are diaphragm/piston type transducers using an elastomer in contact with the fluid, backed by a piston cylinder. This allows high sensitivity for low pressures and strength for high pressures. Open Frame tandard port connection is 1/4 NT (optional 1/2 NT add suffix B to catalog number) pecifications Limited Transducer Units 12 Operating Range Vacuum 0-30 Hg Compound 30 Hg-14 psig ressure roof ressure At From/To Open Frame urpose Enclosure 1 G36A G26A G36A G26A G36A G26A G16A G16A G16A G16A G16A G26A G16A G26A G16A G16A G30A G20A G30A G20A G30A G20A G10A G10A G10A G10A G10A G20A G10A G20A G10A G10A G31B G21B G31B G21B G31B G21B G11B G11B G11B G11B G11B G21B G11B G21B G11B G11B Air or Gas 2 Nylon & Buna N RV34A11 RV24A11 RD30A11 RD20A11 RE20A11 RE10A11 RF10A11 RG10A11 RH10A11 RJ10A11 All switch units and transducer units above are in stock for immediate delivery. 1 Values shown are nominal. 2 Rated proof pressure on RF10A71 is 150 psig and on RG10A71 is 300 psig transducer deadbands are approx. 50% greater than listed. 4 Transducers ending in 32 have 303 process connections, not 316. RD30A71 RD20A71 RE20A71 RE10A71 RF10A71 RG10A71 Air, Oil or Gas Aluminum & Buna N Water, Air, Oil or Gas Brass & Buna N RV34A21 RV24A21 RD30A21 RD20A21 RE20A21 RE10A21 RF10A21 RG10A21 RH10A21 RJ10A21 RL20A21 RL10A21 RN20B21 RN10B21 Corrosive Fluids All 316 RE30A44 RE20A44 RE10A44 RF10A44 RG10A44 RH10A44 RJ10A & Viton 3 4 RV34A32 RV24A32 RD30A42 RD20A42 RE20A42 RE10A42 RF10A42 RG10A42 RH10A42 RJ10A42 RL20A42 RL10A42 RN10B42 RN10B42 RQ10B42

13 -ERIE ressure witches witches for ressure to 8000 psig, Vacuum, or Differential with urpose, or Explosion-roof Enclosures Features: et point repeatability, +1% of operating range. All wiring terminals, adjustments and visual scales are accessible from the front of the switch. Choice of general purpose, watertight or explosionproof enclosures. Choice of fixed or full-range adjustable deadband. Choice of single or two-stage units. Manual reset units available. Mounts in any position. Rugged and vibration resistant. Visual adjustment scales in psi and bars. External adjusting nuts. eparate electrical, pressure and adjusting chambers. Wide selection of transducer wetted materials suitable for air, water, oil or corrosive fluids. Mix and match switch and transducer components for increased stock flexibility or to change pressure ranges in field. Description: ACO -eries pressure switches consist of a switch unit and a transducer unit. They can be ordered separately for customer stocking and/or field assembly or as a complete factory-assembled unit. witch -eries pressure switch units incorporate the unique ACO TRI-OINT alternating fulcrum balance plate to control the operation of one or more electrical snapaction swtiches. The electrical snap-action switch together with the adjusting mechanism is a fully-tested, self-contained subassembly. Transducer Transducer unit incorporates a diaphragm/piston type pressure sensor, and is also a fully-tested, self-contained subassembly. Operation When pressure is applied to the transducer it is converted into movement of the piston. This piston movement is then used to control the operation of the electrical snap-action switch in the switch unit. tandard Electrical Ratings A, B, C, D and E eries 15 Amp Res., 125 VAC 10 Amp Res., 250 VAC 1/8 H, 125 VAC 1/4 H, 250 VAC 1/2 Amp Res., 125 VDC 1/4 Amp Res., 250 VDC ^ % tandard Temperature Ratings NO C NC DT Ambient: -4 F (-20 C) to 140 F (60 C) Fluid: For Buna N or Neoprene Diaphragm -4 F (-20 C) to 180 F (82 C) For Viton Diaphragm -4 F (-20 C) to 250 F (121 C) For 316 Diaphragm -50 F (-45 C) to 300 F (149 C) Options (ee pages 34-35) 14

14 4 123 witches with Optional 316 tainless teel Enclosure Every ACO -eries pressure switch is available in a corrosion-resistant, stainless steel enclosure. Typical applications include: Offshore platforms Hydrocarbon processing plants Oil & gas fields Oil & gas transmission lines Chemical plants Breweries aper pulp mills alt spray locations tainless teel Enclosure ACO Type 4X watertight enclosure is designed to provide protection against windblown dust, rain, sleet or external ice formation. The switch and transducer unit are available only as factory-assembled units, and include a UL-approved 1/2 NT conduit hub. How to elect and Order ACO -eries switches with 316 enclosure consist of two factory-assembled components, the switch unit and the transducer unit. Dimensions (inches) -eries ressure with Optional 316 Enclosure How to elect (use tables on pages 10-12) 1. elect the adjustable operating range based on desired actuation pressure. 2. Check that rated proof pressure is sufficient. 3. Read across and select the desired -eries switch unit with open frame construction. 4. To add a 316 enclosure, change the fourth digit of the open frame catalog number from 6 to 4, e.g., G3 6 A becomes G3 4 A. 5. Continue across and select a matching transducer unit compatible with the fluid. How to Order Factory assembled only imply order the switch and transducer unit by catalog number joined by a slash (/), e.g., G34A/RV34A32. Options Add appropriate suffix for desired option (see pages 34-35)..27 DIA. 2 HOLE FOR MOUNTING 2.1 1/4 OR 1/2 NT /2 NT CONDUIT CONNECTION 1.7 NOTE: THI DIMENION WILL VARY FROM 5.0 MIN. TO 6.04 MAX. DEENDING ON TRANDUCER ECIFIED. * MOUNTING BRACKET OTIONAL

15 4 123 Enclosures ACO TRI-OINT -eries switches are available in three standard enclosures. All of these enclosed units are made in accordance with NEMA and UL standards. urpose Type 1. These enclosures are designed for indoor use to protect personnel from accidental contact with the equipment. -eries general purpose switch units consist of a copper-free* aluminum die-cast body with a formed copper-free* aluminum cover; two 3/4 conduit hubs with one plug are provided. Type 4. and dust-tight enclosures are intended for use indoors and outdoors to protect the enclosed equipment against splashing or falling water, windblown dust and water, hose directed water, and severe external condensation. -eries watertight switch units have a copper-free* aluminum die-cast body and a formed copper-free* aluminum cover with Buna N gaskets; two 3/4 conduit hubs with one plug are provided. Explosion-roof Types 7 and 9. Type 7 enclosures are intended for use in locations defined by the National Electrical Code as Class I. Type 9 enclosures are intended for Class II locations. Class I locations are those in which flammable gases are or may be present in the air in sufficient quantities to produce explosive or ignitable mixtures. Class I locations are classified by group letter, which defines particular atmospheres. Division 1 locations are areas where the hazardous concentration exists continuously, intermittently or periodically under normal operating conditions. Division 2 locations are those where the hazardous vapors are present only in case of accidental rupture or breakdown of equipment. ACO TRI-OINT explosion-proof enclosures with letter B, C or D in the fifth position are listed for Class I, Groups B, C, and D, Division 1. They are also suitable for the less stringent Division 2 environment. Class II locations are those which are hazardous because of the presence of combustible dust. All ACO TRI-OINT explosion-proof enclosures are listed for Groups E, F, and G locations. The switch body and cover are die-cast copper-free* aluminum with a Buna N gasket. Two 3/4 conduit hubs with one plug are provided. Dimensions (inches) -eries ressure With Types TD - TV Transducers With Types TA - TC Transducers 3.5 ADDITIONAL ACE REQUIRED FOR REMOVAL OF COVER 1/4 NT VENT CONNECTION ON DOUBLE CHAMBER TRANDUCER 3.5 ADDITIONAL ACE REQUIRED FOR REMOVAL OF COVER /4 NT FOR CONDUIT CONN. BOTH END 11/32 DIA. FOR MOUNTING (2LACE) /4 NT FOR CONDUIT CONN. BOTH END 11/32 DIA. FOR MOUNTING (2LACE) /4 OR 1/2 NT /4 NT 1 ON TV ERIE ADD 7/16" TO THEE DIMENION * Less than 0.6% copper. 15

16 -ERIE ressure witches (to 8000 psig) How to elect and Order ACO -eries switches consist of two components, the switch unit and the transducer unit. How to elect 1. elect the adjustable operating range based on desired actuation pressure. 2. Check that proof pressure is sufficient. 3. Read across and select the desired -eries switch unit with the proper enclosure. 4. Continue across and select a matching transducer unit compatible with the fluid. How to Order Factory assembled imply order the switch and transducer unit by catalog number joined by a slash (/), e.g., A40D/TA40A11. Field assembled imply order the switch and transducer units separately by individual catalog number, e.g., one A40D and one TA40A11. A witch Unit ingle-tage units allow independent adjustment of the set and reset points over the full operating range of the switch. The minimum difference between set and reset points is the deadband listed below; the maximum difference is the full range of the switch. urpose elect -eries pressure switch B, D or E witch Unit B witch Unit: ingle-tage Fixed units have an adjustable set point and a non-adjustable automatic reset point. D witch Unit: Manual reset on decreasing pressure units operate automatically on increasing pressure and must be reset manually on decreasing pressure. (To order, change second digit to letter D, e.g., B 40D becomes D 40D). E witch Unit: Manual reset on increasing pressure units operate automatically on decreasing pressure and must be reset manually on increasing pressure. (To order, change second digit to letter E, e.g., B 40D becomes E 40D). pecifications Fixed or Manual Reset Maximum Full cale Operating Range roof ressure Minimum At 1 urpose Enclosure Explosion- roof Fixed At 1 urpose Enclosure Explosion- roof 0-12 W.C W.C W.C W.C W.C W.C W.C. 2.0 W.C. 2.5 W.C. 6 W.C. 10 W.C. 15 W.C A40D A30D A20D A20D A10D A10D A40D A30D A40D A20D A30D A20D A10D A30D A10D A20D A10D A10D A10D A10D A10D A10D A10D A10D A10D A41D A31D A21D A21D A11D A11D A41D A31D A41D A21D A31D A21D A11D A31D A11D A21D A11D A11D A11D A11D A11D A11D A11D A11D A11D A42D A32D A22D A22D A12D A12D A42D A32D A42D A22D A32D A22D A12D A32D A12D A22D A12D A12D A12D A12D A12D A12D A12D A12D A12D 1.0 W.C. 1.2 W.C. 1.4 W.C. 3 W.C. 6 W.C. 8 W.C B40D B30D B20D B20D B10D B10D B40D B30D B40D B20D B30D B20D B10D B30D B10D B20D B10D B10D B10D B10D B10D B10D B10D B10D B10D B41D B31D B21D B21D B11D B11D B41D B31D B41D B21D B31D B21D B11D B31D B11D B21D B11D B11D B11D B11D B11D B11D B11D B11D B11D B42D B32D B22D B22D B12D B12D B42D B32D B42D B22D B32D B22D B12D B32D B12D B22D B12D B12D B12D B12D B12D B12D B12D B12D B12D All switch units above are in stock for immediate delivery Values shown are nominal.

17 4 123 Options Add appropriate suffix for desired option (see pages 34-35). Important Note: The third digit of each of the catalog numbers must be identical, e.g., A 4 0D and TA 4 0A11. elect transducer unit below A, B, C, D and E unit below C witch Unit Two-tage Fixed units consist of two separate snap-action switches, each with an independently adjustable set point and non-adjustable reset point. The difference between the set and reset points of each switch is the deadband listed below; the minimum difference between the set points of the two switches is the separation. Explosion roof eries TA-TC eries TD-TQ tandard connection is 1/4 NT; (Optional 1/2 NT add suffix B to catalog numbers TD thru TQ) Transducer Unit These guage pressure type transducers provide for one pressure connection in the bottom of the transducer. They are diaphragm/piston type transducers using an elastomer in contact with the fluid, backed by a piston cylinder. This allows high sensitivity for low pressures and strength for high pressures. Two-tage Fixed Transducer Units Fixed At 1 eparation Maximum Full cale Minimum At 1 urpose Enclosure Explosion- roof Air, Oil or Gas Aluminum & Buna N Water, Air Oil or Gas Brass & Buna N Corrosive Fluids All & Viton W.C. 1.4 W.C. 1.6 W.C. 4.0 W.C. 7.0 W.C W.C W.C. 2.7 W.C. 6.5 W.C. 14 W.C. 25 W.C. 40 W.C C40D C30D C20D C20D C10D C10D C40D C30D C40D C20D C30D C20D C10D C30D C10D C20D C10D C10D C10D C10D C10D C10D C10D C10D C10D C41D C31D C21D C21D C11D C11D C41D C31D C41D C21D C31D C21D C11D C31D C11D C21D C11D C11D C11D C11D C11D C11D C11D C11D C11D C42D C32D C22D C22D C12D C12D C42D C32D C42D C22D C32D C22D C12D C32D C12D C22D C12D C12D C12D C12D C12D C12D C12D C12D C12D TA40A11 TA30A11 TA20A11 TB20A11 TB10A11 TC10A11 TD40A11 TD30A11 TD20A11 TE20A11 TE10A11 TE10A11 TG10A11 TH10A11 TJ10A11 TD40A21 TD30A21 TD20A21 TE20A21 TE10A21 TF10A21 TG10A21 TH10A21 TJ10A21 TK10A21 TL10A21 TM10A21 TN10B21 TE40A44 TE30A44 TE20A44 TE10A44 TF10A44 TG10A44 TH10A44 TJ10A44 All switch units and transducer units above are in stock for immediate delivery transducers increase deadband by 50%. 3 Transducers ending in 32 have 303 process connections, not 316. TA40A32 TA30A32 TA20A32 TB20A32 TB10A32 TC10A32 TD40A42 TD30A42 TD20A42 TE20A42 TE10A42 TG33A42 TF10A42 TG23A42 TG13A42 TG10A42 TH10A42 TJ10A42 TK10A42 TL10A42 TM10A42 TN10B42 TQ10B42 17

18 -ERIE Vacuum, Differential witches How to elect and Order ACO -eries switches consist of two components, the switch unit and the transducer unit. How to elect 1. elect the adjustable operating range based on desired actuation point. 2. Check that proof pressure is sufficient. 3. Read across and select the desired -eries switch unit with the proper enclosure. 4. Continue across and select a matching transducer unit compatible with the fluid. How to Order Factory assembled imply order the switch and transducer unit by catalog number joined by a slash (/), e.g., A30D/TA34A11. Field assembled imply order the switch and transducer units separately by individual catalog number, e.g., one A30D and one TA34A11. A witch Unit B, D or E witch Unit C witch Unit ingle-tage units allow independent adjustment of the set and reset points over the full operating range of the switch. The minimum difference between set and reset points is the deadband listed below; the maximum difference is the full range of the switch. urpose elect -eries pressure switch B witch Unit: ingle-tage Fixed units have an adjustable set point and a non-adjustable automatic reset point. D witch Unit: Manual reset on decreasing pressure units operate automatically on increasing pressure and must be reset manually on decreasing pressure. (To order, change second digit to letter D, e.g., B 30D becomes D 30D). E witch Unit: Manual reset on increasing pressure units operate automatically on decreasing pressure and must be reset manually on increasing pressure. (To order, change second digit to letter E, e.g., B 30D becomes E 30D). Options Add appropriate suffix for desired option (see pages 34-35). Important Note: The third digit of each of the catalog numbers must be identical, e.g., A 3 0D and TA 3 4A11. A, B, C, D and E unit below Two-tage Fixed units consist of two separate snap-action switches, each with an independently adjustable set point and non-adjustable reset point. The difference between the set and reset points of each switch is the deadband listed below; the minimum difference between the set points of the two switches is the separation. Explosion roof elect transducer unit below The vacuum transducer has a spring which preloads the switch unit when no vacuum is applied. On application, the vacuum acts on a piston area to overcome the spring to operate the switch unit. Vacuum Transducer The differential pressure transducer has two pressure sources acting on the piston area in opposite directions. The force output is proportional to the difference between these pressures, allowing the differential pressure to be contolled by adjustment of the switch unit. Differential ressure Transducer pecifications Fixed or Manual Reset Two-tage Fixed Transducer Units Operating Range (In W.C.) roof ressure At (In W.C.) 1 From/To urpose Explosion- roof Fixed At (In W.C.) 1 urpose Explosion- roof Fixed At (In W.C.) 1 eparation Maximum Full cale Minimum At (In W.C.) 1 urpose Explosion- roof Air or Gas Aluminum & Buna N Water, Air Oil or Gas Brass & Buna N Corrosive Fluids 303 & Viton Vacuum 0-30 Hg 15 I - 30 Hg Hg 3-57 Hg A30D A20D A30D A20D A20D A10D A10D A31D A21D A31D A21D A21D A11D A11D A32D A22D A32D A22D A22D A12D A12D 1.2 Hg 1.7 Hg B30D B20D B30D B20D B20D B10D B10D B31D B21D B31D B21D B21D B11D B11D B32D B22D B32D B22D B22D B12D B12D 1.7 Hg 2.0 Hg Hg 8 Hg C30D C20D C30D C20D C20D C10D C10D C31D C21D C31D C21D C21D C11D C11D C32D C22D C32D C22D C22D C12D C12D TV34A11 TV24A11 TA31A11 TA21A11 TB21A11 TB11A11 TC11A11 TV34A21 TV24A21 TV34A32 TV24A32 Differential A40D A30D A20D A20D A10D A10D A41D A31D A21D A21D A11D A11D A42D A32D A22D A22D A12D A12D B40D B30D B20D B20D B10D B10D B41D B31D B21D B21D B11D B11D B42D B32D B22D B22D B12D B12D C40D C30D C20D C20D C10D C10D C41D C31D C21D C21D C11D C11D C42D C32D C22D C22D C12D C12D TA41A11 TA31A11 TA21A11 TB21A11 TB11A11 TC11A11 1 Values shown are nominal. All switch units above are in stock for immediate delivery. All switch units and transducer units above are in stock for immediate delivery

19 -ERIE Combustion witches ressure witches Designed to UL or FM Requirements for Combustion ervice Features: et point repeatability, +1% of operating range. UL Listed in the gas and oil equipment list. FM Approved as pressure supervisory switches. Externally visible pressure setting scales. External adjusting nuts. Choice of fixed or full-range adjustable deadbands. Choice of single or two-stage units. Mounts in any position. Rugged and vibration resistant. eparate electrical, pressure and adjusting chambers. Mix and match switch and transducer components for increased stock flexibility or to change pressure ranges in field. Withstands high surge pressures. Description: ACO -eries combustion switches consist of a switch unit and a transducer unit. They can be ordered separately for customer stocking and/or field assembly or as a complete factory-assembled unit. witch -eries combustion switch units incorporate the unique ACO TRI-OINT alternating fulcrum balance plate to control the operation of one or more electrical snap-action swtiches. The electrical snap-action switch together with the adjusting mechanism is a fully-tested, self-contained subassembly. Transducer Transducer unit incorporates a diaphragm/piston type pressure sensor, and is also a fully-tested, self-contained subassembly. Operation When pressure is applied to the transducer it is converted into movement of the piston. This piston movement is then used to control the operation of the electrical snap-action switch in the switch unit. Options (ee pages 34-35) Dimensions (ee page 15) tandard Electrical Ratings A, D and E eries 1 5 Amp Res., 125, 250 VAC 1/8 H, 125 VAC 1/4 H, 250 VAC 1/2 Amp Res., 125 VDC 1/4 Amp Res., 250 VDC B and C eries 5 Amp Res., 125, 250 VAC 1/4 H, 125 VAC 1/2 H, 250 VAC.4 Amp Res., 125, VDC ^ 1 D and E eries not FM Approved. tandard Temperature Ratings # Ambient: -4 F (-20 C) to 140 F (60 C) Fluid: For Buna N or Neoprene Diaphragm -4 F (-20 C) to 180 F (82 C) For Viton Diaphragm -4 F (-20 C) to 250 F (121 C) For 316 Diaphragm -50 F (-45 C) to 300 F (149 C) NO C NC DT 20

20 4 123 UL Requirements Underwriters Laboratories, Inc. s tandard UL 353 defines construction and performance requirements for limit controls. witch -eries combustion switch units when mated to the pressure transducers described below form pressure switches in accordance with UL requirements. Transducers Fuel Gas UL requires a pressure transducer with a secondary chamber. This chamber allows the gas to be vented to a safe location in the event of primary sensing element rupture. The double chamber with vent pressure transducers meet this requirement. Fuel Oil UL requirements for fuel oil applications waive the double chamber requirement, providing the sensing element is made of Type 316 or eries type 316 pressure transducers are designed to meet this requirement. ervice ressure transducers for water, steam and air service may be of the single chamber design. Enclosures ACO TRI-OINT -eries switches are available in three standard enclosures. All of these enclosed units are made in accordance with NEMA and UL standards. urpose Type 1. These enclosures are designed for indoor use to protect personnel from accidental contact with the equipment. -eries general purpose switch units consist of a copper-free* aluminum die-cast body with a formed copper-free* aluminum cover; two 3/4 conduit hubs with one plug are provided. Type 4. and dust-tight enclosures are intended for use indoors and outdoors to protect the enclosed equipment against splashing or falling water, windblown dust and water, hose directed water, and severe external condensation. -eries watertight switch units have a copper-free* aluminum die-cast body and a formed copper-free* aluminum cover with Buna N gaskets; two 3/4 conduit hubs with one plug are provided. Explosion-roof Types 7 and 9. Type 7 enclosures are intended for use in locations defined by the National Electrical Code as Class I. Type 9 enclosures are intended for Class II locations. Class I locations are those in which flammable gases are or may be present in the air in sufficient quantities to produce explosive or ignitable mixtures. Class I locations are classified by group letter, which defines particular atmospheres. Division 1 locations are areas where the hazardous concentration exists continuously, intermittently or periodically under normal operating conditions. Division 2 locations are those where the hazardous vapors are present only in case of accidental rupture or breakdown of equipment. ACO TRI-OINT explosion-proof enclosures with letter B, C or D in the fifth position are listed for Class I, Groups B, C, and D, Division 1. They are also suitable for the less stringent Division 2 environment. Class II locations are those which are hazardous because of the presence of combustible dust. All ACO TRI-OINT explosion-proof enclosures are listed for Groups E, F, and G locations. The switch body and cover are die-cast copper-free* aluminum with a Buna N gasket. Two 3/4 conduit hubs with one plug are provided. FM Requirements Fuel Gas and Fuel Oil FM requires that fuel gas and fuel oil pressure supervisory switches shall have a visible external means of determining switch position. No specific constructions are required for the pressure transducer. witch units with visual position indication (suffix V ) in conjunction with single chamber pressure transducers will meet these requirements. ervice tandard switch units with an adjusting nut cover, when mated to single chamber transducers, meet FM requirements for general applications such as airflow interlocking switches. Enclosures urpose Designed to Type 1 specifications for indoor applications. Die casting is copper-free* aluminum; covers are polycarbonate. Two 3/4 conduit hubs with one plug are provided. Designed to Types 4 specifications for indoor/outdoor use. Die casting is copper-free* aluminum. Cover are polycarbonate and gaskets are neoprene. Two 3/4 conduit hubs with one plug are provided. * Less than 0.6% copper. 21

21 -ERIE Combustion witches How to elect and Order ACO -eries switches consist of two components, the switch unit and the transducer unit. How to elect 1. elect the adjustable operating range based on desired actuation pressure. 2. Check that proof pressure is sufficient. 3. Read across and select the desired -eries switch unit with the proper enclosure. 4. Continue across and select a matching transducer unit compatible with the fluid. How to Order Factory assembled imply order the switch and transducer unit by catalog number joined by a slash (/), e.g., A30D/TA31A11. Field assembled imply order the switch and transducer units separately by individual catalog number, e.g., one A30D and one TA31A11. A witch Unit ingle-tage units allow independent adjustment of the set and reset points over the full operating range of the switch. The minimum difference between set and reset points is the deadband listed below; the maximum difference is the full range of the switch. UL urpose elect -eries pressure switch B, D or E witch Unit B witch Unit: ingle-tage Fixed units have an adjustable set point and a non-adjustable automatic reset point. D witch Unit: Manual reset on decreasing pressure units operate automatically on increasing pressure and must be reset manually on decreasing pressure. (To order, change second digit to letter D, e.g., B 30D becomes D 30D). E witch Unit: Manual reset on increasing pressure units operate automatically on decreasing pressure and must be reset manually on increasing pressure. (To order, change second digit to letter E, e.g., B 30D becomes E 30D). pecifications Fixed or Manual Reset 2 roof ressure Maximum Full cale Minimum At 1 urpose Enclosure Explosion- roof Fixed At (psig.) 1 urpose Enclosure Explosion- roof W.C. 2.5 W.C. 6.0 W.C W.C W.C A30D A20D A20D A10D A10D A40D A30D A30D A20D A10D A20D A10D A31D A21D A21D A11D A11D A41D A31D A31D A21D A11D A21D A11D A32D A22D A22D A12D A12D A42D A32D A32D A22D A12D A22D A12D 1.2 W.C. 1.4 W.C. 3.0 W.C. 6.0 W.C. 8.0 W.C B30D B20D B20D B10D B10D B40D B30D B30D B20D B10D B20D B10D B31D B21D B21D B11D B11D B41D B31D B31D B21D B11D B21D B11D B32D B22D B22D B12D B12D B42D B32D B32D B22D B12D B22D B12D Operating Range UL Listed 0-27 W.C W.C W.C W.C W.C FM Approved 2-12 W.C W.C W.C W.C W.C W.C W.C. 2.0 W.C. 2.5 W.C. 6.0 W.C W.C W.C A40DV A30DV A20DV A20DV A10DV A10DV A40DV A30DV A20DV A20DV A10DV A10DV A41DV A31DV A21DV A21DV A11DV A11DV A41DV A31DV A21DV A21DV A11DV A11DV 1.0 W.C. 1.2 W.C. 1.4 W.C. 3.0 W.C. 6.0 W.C. 8.0 W.C B40DV B30DV B20DV B20DV B10DV B10DV B40DV B30DV B20DV B20DV B10DV B10DV B41DV B31DV B21DV B21DV B11DV B11DV B41DV B31DV B21DV B21DV B11DV B11DV 22 1 Values shown are nominal. 2 Manual reset units not available for FM.

22 4 123 Options Add appropriate suffix for desired option (see pages 34-35). Important Note: The third digit of each of the catalog numbers must be identical, e.g., A 3 0D and TA 3 1A11. elect transducer unit below A, B, C, D and E unit below C witch Unit Two-tage Fixed units consist of two separate snap-action switches, each with an independently adjustable set point and non-adjustable reset point. The difference between the set and reset points of each switch is the deadband listed below; the minimum difference between the set points of the two switches is the separation. UL Listed FM Approved tandard connection is 1/4 NT Transducer Unit Two-tage Fixed FM urpose These guage pressure type transducers provide for one pressure connection in the bottom of the transducer. They are diaphragm/piston type transducers using an elastomer in contact with the fluid, backed by a piston cylinder. UL requires a double chamber transducer for fuel gas service and single chamber 316 transducer for fuel oil service. Transducer Units eparation Fixed At W.C. 2.0 W.C. 4.0 W.C. 7.0 W.C W.C W.C. 1.7 W.C. 2.0 W.C. 4.0 W.C. 7.0 W.C W.C Maximum Full cale Minimum At W.C. 6.5 W.C W.C W.C W.C W.C. 2.7 W.C. 6.5 W.C W.C W.C W.C urpose C30D C20D C20D C10D C10D C40D C30D C30D C20D C10D C20D C10D C40DV C30DV C20DV C20DV C10DV C10DV C40DV C30DV C20DV C20DV C10DV C10DV Enclosure C31D C21D C21D C11D C11D C41D C31D C31D C21D C11D C21D C11D C41DV C31DV C21DV C21DV C11DV C11DV C41DV C31DV C21DV C21DV C11DV C11DV Explosion- roof C32D C22D C22D C12D C12D C42D C32D C32D C22D C12D C22D C12D Aluminum & Buna N TA31A11 TA21A11 TB21A11 TB11A11 TC11A11 TA40A11F TA30A11F TA20A11F TB20A11 TB10A11 TC10A11 TD40A11 TD30A11 TD20A11 TE20A11 TE10A11 TF10A11 Fuel Gas Brass & Buna N TF32A21 TF22A21 TF12A21 All 316 Fuel Oil TE40A44 TE30A44 TE20A44 TE10A44 TF10A44 Fuel Gas and Fuel Oil TD40A21 TD30A21 TD20A21 TE20A21 TE10A21 TF10A transducers increase deadband by 50%. 4 Transducers ending in 32 have 303 process connections, not & Viton 4 TA40A32F TA30A32F TA20A32F TB20A32 TB10A32 TC10A32 TD40A42 TD30A42 TD20A42 TE20A42 TE10A42 TF10A42 23

23 -ERIE Temperature witches witches for -60 through 510 F with et oints and Fixed or Features: et point repeatability, +1 F (1/2 C). All wiring terminals, adjustments and visual scales are accessible from the front of the switch. Choice of open frame type, general purpose, or watertight enclosure. Choice of fixed, limited adjustable or full-range adjustable deadband. Choice of single or two-stage units. Compact size. Mounts in any position. Rugged and vibration resistant. Visual adjustment scales in F and C. Direct mount (local) or capillary and bulb (remote) sensors. Temperature transducers available with copper or 316 wetted material. Withstands high overrange temperatures. Mix and match switch and transducer components for increased stock flexibility or to change pressure ranges in field. Description: ACO -eries temperature switches consist of an open frame or enclosure protected switch unit and a transducer unit. They can be ordered separately for customer stocking and/or field assembly or as a complete factory-assembled unit. witch -eries temperature switch units incorporate the unique ACO TRI-OINT alternating fulcrum balance plate to control the operation of one or more electrical snap-action swtiches. The electrical snap-action switch together with the adjusting mechanism is a fully-tested, self-contained subassembly. Transducer The temperature transducer unit uses a vapor pressure principle where the internal pressure within the unit is generated by the vapor pressure of a chemical within a sealed system. Temperature transducers are available in two constructions, a direct mount or capillary and bulb construction. The direct mount unit includes a 1/2 NT connection for direct mounting to the process. The capillary and bulb construction allows remote mounting from the process. The transducer unit (like the switch unit) is a fully-tested, self-contained subassembly. tandard Electrical Ratings A, B, C 1 eries 15 Amp Res., 125 VAC 10 Amp Res., 250 VAC 1/8 H, 125 VAC 1/4 H, 250 VAC 1/2 Amp Res., 125 VDC 1/4 Amp Res., 250 VDC G 1 eries DT 15 Amp Res., 125 VAC 10 Amp Res., 250 VAC 1/8 H, 125 VAC 1/4 H, 250 VAC ^ % NO tandard Temperature Ratings Ambient: -4 F (-20 C) to 122 F (50 C) Fluid: ee specification table on page 26 for rated overrange temperature. Operation Temperature sensed by the bulb creates an internal pressure within the transducer. This pressure is then converted into movement of the piston. This piston movement is then used to control the operation of the electrical snap-action switch in the switch unit. Options (ee pages 34-35) C NC 1 C and G eries not UL listed or CA approved, C eries rated 10 Amp Res., 125/250 VAC; 1/3 H 125/250 VAC. 24

24 4 123 Enclosures ACO TRI-OINT switches are available in either a general purpose or watertight enclosure, in addition to open frame construction. These enclosed units are made in accordance with NEMA and UL standards. These standards define the protection level an enclosure gives and the tests it must pass to meet a particular design. urpose Type 1. These enclosures are designed for indoor use to protect personnel from accidental contact with the equipment. -eries general purpose enclosures are painted, zinc-coated Dimensions (inches) steel and have a 7/8 diameter hole at the top for electrical entry. Type 4. and dust-tight enclosures are intended for use indoors and outdoors to protect the enclosed equipment against splashing or falling water, windblown dust and water, hose directed water, and severe external condensation. -eries watertight switch enclosures are epoxy-painted, zinccoated steel with a 1/2 conduit hub in the side of the lower housing for electrical entry. (For optional 316 watertight enclosure see page 29.) -eries Temperature (Mounting brackets optional) Open Frame A and C witch Units with Transducer Unit Types RD-RV Open Frame B and G witch Units with Transducer Unit DIA HOLE FOR MOUNTING WITH #10 (.190 DIA.) CREW (2 LACE) 3.8 DIA. 3.8 DIA /2 NT.233 DIA HOLE FOR MOUNTING WITH #10 (.190 DIA.) CREW (2 LACE) 1/2 NT DIA HOLE FOR MOUNTING WITH #10 (.190 DIA.) CREW (2 LACE) DIA. 3.8 DIA Type 1 urpose witch Unit with Transducer Unit Type 4 witch Unit with Transducer Unit /8 DIA. HOLE FOR 1/2 CONDUIT CONNECTION.223 DIA. HOLE FOR MOUNTING WITH #10 (.190 DIA.) CREW (2 LACE) ADDITIONAL ACING REQUIRED FOR REMOVAL OF COVER DIA DIA /2 NT CONDUIT CONNECTION /2 NT DIA HOLE FOR MOUNTING WITH #10 (.190 DIA.) CREW (2 LACE) 1/2 NT DIA HOLE FOR MOUNTING WITH #10 (.190 DIA.) CREW (2 LACE) DIA DIA

25 -ERIE Temperature witches How to elect and Order ACO -eries switches consist of two components, the switch unit and the transducer unit. How to elect 1. elect the adjustable operating range based on desired actuation temperature. 2. Check that rated overrange temperature is sufficient. 3. Read across and select the desired -eries switch unit with the proper enclosure. 4. Continue across and select a matching transducer unit. urpose Enclosure A witch Unit ingle-tage units allow independent adjustment of the set and reset points over the full operating range of the switch. The minimum difference between set and reset points is the deadband listed below; the maximum difference is the full range of the switch. elect -eries temperature switch B witch Unit ingle-tage Fixed units have an adjustable set point and a non-adjustable automatic reset point. Enclosure Open Frame Open Frame pecifications Fixed Operating Range ( F) Rated Overrange Temperature ( F) Capillary Direct Mount Copper Maximum Full cale Minimum At ( F) 1 Open Frame urpose Enclosure Fixed At ( F) 1 Open Frame urpose Enclosure A16A A16A A16A A16A A16A A16A A16A A16A A10A A10A A10A A10A A10A A10A A10A A10A A11B A11B A11B A11B A11B A11B A11B A11B B16A B16A B16A B16A B16A B16A B16A B16A B10A B10A B10A B10A B10A B10A B10A B10A B11B B11B B11B B11B B11B B11B B11B B11B C = ( F -32) x 5/9 All switch units above are in stock for immediate delivery Values shown are nominal.

26 4 123 How to Order Factory assembled imply order the switch and transducer unit by catalog number joined by a slash (/), e.g., A16A/KA10A1. Field assembled imply order the switch and transducer units separately by individual catalog number, e.g., one A16A and one KA10A1. Options Add appropriate suffix for desired option or accessory (see pages 34-35). Important Note: The third digit of each of the catalog numbers must be identical, e.g., A 1 6A and KA 1 0A1. elect transducer unit below A, B, or C unit below C witch Unit Two-tage Fixed units consist of two separate snap-action switches, each with an independently adjustable set point and nonadjustable reset point. The difference between the set and reset points of each switch is the deadband listed below; the minimum difference between the set points of the two switches is the separation. Open Frame Two-tage Fixed Direct Mount 1/2 NT Transducer Unit Capillary and Bulb The temperature transducer works on the vapor principle where the internal pressure within the system is generated by the vapor pressure of a chemical within a sealed system. The temperature sensed by the bulb is related uniquely to an internal pressure within the system. The pressure acts on a diaphragm/piston to create the force output from the transducer into the switch unit. Temperature transducers are available in two constructions. The direct mount (local) unit includes a 1/2 NT connection for direct application to the process. The capillary and bulb-type construction allows for remote mounting from the process. Temperature Transducer Units eparation Fixed At ( F) Maximum Full cale Minimum At ( F) Open Frame urpose Enclosure Direct Mount Copper 6 Capillary and Bulb 316 Copper 316 Copper Capillary and Bulb 7 9 C16A C10A C11B KB10A1 KB10A4 KB11A1 KB11A4 KB11A1D KB11A4D 7 9 C16A C10A C11B KD10A1 KD10A4 KD11A1 KD11A4 KD11A1D KD11A4D 7 11 C16A C10A C11B KF10A1 KF10A4 KF11A1 KF11A4 KF11A1D KF11A4D 7 12 C16A C10A C11B KJ10A1 KJ10A4 KJ11A1 KJ11A4 KJ11A1D KJ11A4D 7 10 C16A C10A C11B KL10A1 KL10A4 KL11A1 KL11A4 KL11A1D KL11A4D 7 12 C16A C10A C11B KN11A1 KN11A4 KN11A1D KN11A4D 9 15 C16A C10A C11B KT11A1 KT11A4 KT11A1D KT11A4D 9 16 C16A C10A C11B KU11A1 KU11A4 KU11A1D KU11A4D All switch units and transducer units above are in stock for immediate delivery. 27

27 -ERIE Temperature witches How to elect and Order ACO -eries switches consist of two components, the switch unit and the transducer unit. How to elect 1. elect the adjustable operating range based on desired actuation temperature. 2. Check that rated overrange temperature is sufficient. 3. Read across and select the desired -eries switch unit with the proper enclosure. 4. Continue across and select a matching transducer unit. How to Order Factory assembled imply order the switch and transducer unit by catalog number joined by a slash (/), e.g., G16A/KA10A1. Field assembled imply order the switch and transducer units separately by individual catalog number, e.g., one G16A and one KA10A1. Options Add appropriate suffix for desired option (see pages 34-35). Important Note: The third digit of each of the catalog numbers must be identical, e.g., G 1 6A and KA 1 0A1. elect -eries switch unit and transducer unit below G witch Unit Transducer Unit Limited units have an adjustable set point and use a special snapaction switch that varies the deadband within the limits listed below. The temperature transducer works on the vapor principle where the internal pressure within the system is generated by the vapor pressure of a chemical within a sealed system. The temperature sensed by the bulb is related uniquely to an internal pressure within the system. The pressure acts on a diaphragm/piston to create the force output from the transducer into the switch unit. Open Frame Direct Mount 1/2 NT Capillary and Bulb pecifications Limited Temperature Transducer Units Operating Range ( F) Rated Overrange Temperature ( F) Capillary Direct Mount Copper Maximum Full cale Minimum At ( F) 1 Open Frame urpose Enclosure Direct Mount Copper 6 Capillary and Bulb 316 Copper 316 Copper Capillary and Bulb G16A G10A G11B KB10A1 KB10A4 KB11A1 KB11A4 KB11A1D KB11A4D G16A G10A G11B KD10A1 KD10A4 KD11A1 KD11A4 KD11A1D KD11A4D G16A G10A G11B KF10A1 KF10A4 KF11A1 KF11A4 KF11A1D KF11A4D G16A G10A G11B KJ10A1 KJ10A4 KJ11A1 KJ11A4 KJ11A1D KJ11A4D G16A G10A G11B KL10A1 KL10A4 KL11A1 KL11A4 KL11A1D KL11A4D G16A G10A G11B KN11A1 KN11A4 KN11A1D KN11A4D G16A G10A G11B KT11A1 KT11A4 KT11A1D KT11A4D G16A G10A G11B KU11A1 KU11A4 KU11A1D KU11A4D C = ( F -32) x 5/9 All switch units and transducer units above are in stock for immediate delivery Values shown are nominal.

28 4 123 witches with Optional 316 tainless teel Enclosure Every ACO -eries temperature switch is available in a corrosion-resistant, stainless steel enclosure. Typical applications include: Offshore platforms Hydrocarbon processing plants Oil & gas fields Oil & gas transmission lines Chemical plants Breweries aper pulp mills alt spray locations tainless teel Enclosure ACO Type 4X watertight enclosure is designed to provide protection against windblown dust, rain, sleet or external ice formation. The switch and transducer unit are available only as factory-assembled units. How to elect and Order ACO -eries switches with 316 enclosure consist of two factory-assembled components, the switch unit and the transducer unit. How to elect (use tables on pages 26-28) 1. elect the adjustable operating range based on desired actuation temperature. 2. Check that rated overrange temperature is sufficient. 3. Read across and select the desired -eries switch unit with open frame construction. 4. To add a 316 enclosure, change the fourth digit of the open frame catalog number from 6 to 5, e.g., G1 6 A becomes G5 5 A. 5. Continue across and select a matching direct mount or capillary and bulb transducer unit compatible with the fluid. For direct mount unit add suffix D to switch catalog number, e.g., G15A becomes G15AD; for capillary and bulb unit add suffix C, e.g., G15A becomes G15AC. How to Order Factory assembled only imply order the switch and transducer unit by catalog number joined by a slash (/), e.g., G15AD/KA10A4 for direct mount and G15AC/KA11A4 for capillary and bulb unit. Options Add appropriate suffix for desired option (see pages 34-35). Dimensions (inches) -eries Temperature with Optional 316 Enclosure 1/2 NT CONDUIT CONNECTION WRENCH TIGHT DIM. FOR 1/2 IE THREAD *MOUNTING BRACKET OTIONAL /2 NT CONDUIT CONNECTION /8 DIA /8 DIA..27 DIA. 2 HOLE FOR MOUNTING* 1/2 NT /2 NT CONDUIT CONNECTION.27 DIA 2 HOLE FOR MOUNTING* 29

29 -ERIE Temperature witches witches for -60 through 640 F with et oints, Fixed or and urpose, or Explosion-roof Enclosures Features: et point repeatability, +1 F (1/2 C). All wiring terminals, adjustments and visual scales are accessible from the front of the switch. Choice of general purpose, watertight or explosion-proof enclosures. Choice of fixed or full-range adjustable deadband. Choice of single or two-stage units. Manual reset units available. Mounts in any position. Rugged and vibration resistant. Visual adjustment scales in F and C. External adjusting nuts. eparate temperature, electrical and adjusting chambers. Direct mount (local) or capillary and bulb (remote) sensors. Temperature transducers available with copper or 316 stainless steel wetted material. Withstands high overrange temperatures. Mix and match switch and transducer components for increased stock flexibility or to change pressure ranges in field. Description: ACO -eries temperature switches consist of a switch unit and a transducer unit. They can be ordered separately for customer stocking and/or field assembly or as a complete factory-assembled unit. tandard Electrical Ratings A, B, C, D and E eries 15 Amp Res., 125 VAC 10 Amp Res., 250 VAC 1/8 H, 125 VAC 1/4 H, 250 VAC 1/2 Amp Res., 125 VDC 1/4 Amp Res., 250 VDC ^ % DT NO C NC witch -eries temperature switch units incorporate the unique ACO TRI-OINT alternating fulcrum balance plate to control the operation of one or more electrical snap-action swtiches. The electrical snap-action switch together with the adjusting mechanism is a fully-tested, self-contained subassembly. Transducer The temperature transducer unit uses a vapor pressure principle where the internal pressure within the unit is generated by the vapor pressure of a chemical within a sealed system. Temperature transducers are available in two constructions, a direct mount or capillary and bulb construction. The direct mount unit includes a 1/2 NT connection for direct mounting to the process. The capillary and bulb construction allows remote mounting tandard Temperature Ratings Ambient: -4 F (-20 C) to 140 F (60 C) Fluid: ee specification table on page 32 for rated overrange temperature. from the process. The transducer unit (like the switch unit) is a fully-tested, self-contained subassembly. Operation Temperature sensed by the bulb creates an internal pressure within the transducer. This pressure is then converted into movement of the piston. This piston movement is then used to control the operation of the electrical snap-action switch in the switch unit. Options (ee pages 34-35) 30

30 4 123 Enclosures ACO TRI-OINT -eries switches are available in three standard enclosures. All of these enclosed units are made in accordance with NEMA and UL standards. urpose Type 1. These enclosures are designed for indoor use to protect personnel from accidental contact with the equipment. -eries general purpose switch units consist of a copper-free* aluminum die-cast body with a formed copper-free* aluminum cover; two 3/4 conduit hubs with one plug are provided. Type 4. and dust-tight enclosures are intended for use indoors and outdoors to protect the enclosed equipment against splashing or falling water, windblown dust and water, hose directed water, and severe external condensation. -eries watertight switch units have a copper-free* aluminum die-cast body and a formed copper-free* aluminum cover with Buna N gaskets; two 3/4 conduit hubs with one plug are provided. Explosion-roof Types 7 and 9. Type 7 enclosures are intended for use in locations defined by the National Electrical Code as Class I. Type 9 enclosures are intended for Class II locations. Class I locations are those in which flammable gases are or may be present in the air in sufficient quantities to produce explosive or ignitable mixtures. Class I locations are classified by group letter, which defines particular atmospheres. Division 1 locations are areas where the hazardous concentration exists continuously, intermittently or periodically under normal operating conditions. Division 2 locations are those where the hazardous vapors are present only in case of accidental rupture or breakdown of equipment. ACO TRI-OINT explosion-proof enclosures with letter B, C or D in the fifth position are listed for Class I, Groups B, C, and D, Division 1. They are also suitable for the less stringent Division 2 environment. Class II locations are those which are hazardous because of the presence of combustible dust. All ACO TRI-OINT explosion-proof enclosures are listed for Groups E, F, and G locations. The switch body and cover are die-cast copper-free* aluminum with a Buna N gasket. Two 3/4 conduit hubs with one plug are provided. Dimensions (inches) -eriestemperature With Direct Mount Transducer 3.5 ADDITIONAL ACE REQUIRED FOR REMOVAL OF COVER With Capillary and Bulb Transducer /4 NT FOR CONDUIT CONN. BOTH END /32 DIA. FOR MOUNTING (2LACE) 3.8 DIA /2 NT * Less than 0.6% copper. 31

31 -ERIE Temperature witches How to elect and Order ACO -eries switches consist of two components, the switch unit and the transducer unit. How to elect 1. elect the adjustable operating range based on desired actuation temperature. 2. Check that rated overrange temperature is sufficient. 3. Read across and select the desired -eries switch unit with the proper enclosure. 4. Continue across and select a matching transducer unit compatible with the fluid. How to Order Factory assembled imply order the switch and transducer unit by catalog number joined by a slash (/), e.g., A10D/QA10A1. Field assembled imply order the switch and transducer units separately by individual catalog number, e.g., one A10D and one QA10A1. Options Add appropriate suffix for desired option (see pages 34-35). Important Note: The third digit of each of the catalog numbers must be identical, e.g., A 1 0D and QA 1 0A1. A witch Unit ingle-tage units allow independent adjustment of the set and reset points over the full operating range of the switch. The minimum difference between set and reset points is the deadband listed below; the maximum difference is the full range of the switch. elect -eries temperature switch B, D or E witch Unit B witch Unit: ingle-tage Fixed units have an adjustable set point and a non-adjustable automatic reset point. D witch Unit: Manual reset on decreasing temperature units operate automatically on increasing temperature and must be reset manually on decreasing temperature. (To order, change second digit to letter D, e.g., B 40D becomes D 40D). E witch Unit: Manual reset on increasing temperature units operate automatically on decreasing temperature and must be reset manually on increasing temperature. (To order, change second digit to letter E, e.g., B 40D becomes E 40D). urpose pecifications Fixed or Manual Reset Operating Range ( F) Rated Overrange Temperature ( F) Capillary Direct Mount Copper Maximum Full cale Minimum At ( F) 1 urpose Enclosure Explosion- roof Fixed At ( F) 1 urpose Enclosure Explosion- roof A10D A10D A10D A10D A10D A10D A10D A10D A10D A11D A11D A11D A11D A11D A11D A11D A11D A11D A12D A12D A12D A12D A12D A12D A12D A12D A12D B10D B10D B10D B10D B10D B10D B10D B10D B10D B11D B11D B11D B11D B11D B11D B11D B11D B11D B12D B12D B12D B12D B12D B12D B12D B12D B12D C = ( F -32) x 5/9 All switch units above are in stock for immediate delivery Values shown are nominal.

32 4 123 elect transducer unit below A, B, C, D or E unit below C witch Unit Two-tage Fixed units consist of two separate snap-action switches, each with an independently adjustable set point and non-adjustable reset point. The difference between the set and reset points of each switch is the deadband listed below; the minimum difference between the set points of the two switches is the separation. Direct Mount 1/2 NT Transducer Unit Capillary and Bulb The temperature transducer works on the vapor principle where the internal pressure within the system is generated by the vapor pressure of a chemical within a sealed system. The temperature sensed by the bulb is related uniquely to an internal pressure within the system. The pressure acts on a diaphragm/piston to create the force output from the transducer into the switch unit. Temperature transducers are available in two constructions. The direct mount (local) unit includes a 1/2 NT connection for direct application to the process. The capillary and bulb-type construction allows for remote mounting from the process. Explosion roof Two-tage Fixed Transducer Units eparation Direct Mount 6 Capillary and Bulb 12 Capillary and Bulb Fixed At ( F) 1 Maximum Full cale Minimum At ( F) 1 urpose Enclosure Explosion- roof Copper 316 Copper (Armored Capillary) 316 (lain Capillary) Copper (Armored Capillary) 316 & (lain Capillary) C10D C10D C10D C10D C10D C10D C10D C10D C10D C11D C11D C11D C11D C11D C11D C11D C11D C11D C12D C12D C12D C12D C12D C12D C12D C12D C12D QB10A1 QD10A1 QF10A1 QJ10A1 QL10A1 QB10A4 QD10A4 QF10A4 QJ10A4 QL10A4 QB11A1 QD11A1 QF11A1 QJ11A1 QL11A1 QN11A1 QT11A1 QU11A1 QB11A4 QD11A4 QF11A4 QJ11A4 QL11A4 QN11A4 QT11A4 QU11A4 QW11A4 QB11A1D QB11A4D QD11A1D QD11A4D QF11A1D QF11A4D QJ11A1D QJ11A4D QL11A1D QL11A4D QN11A1D QN11A4D QT11A1D QT11A4D QU11A1D QU11A4D QW11A4D All switch units and transducer units above are in stock for immediate delivery. 33