DA /DS Bourdon Tube es Visible setpoint, adjustable deadband, snap action switch pressure ranges to 000 psi Weather-Proof Types DAW, DSW, DRW -/1 2-1/1 REAR MOUNTING FLANGE ().20 DIA. HOLES AT 120 ON -1/2 DIA. BOLT CIRCLE 7 DIA. Ø-1/ [12.] 1-/ [1.2] / 1/2 HUB GASKET 7007-00 1/1 1/29 HOLE SCREWS / [1.] DA is equipped with two external adjustments. One sets high pressure operating point, the other sets reset point. Deadband, or the difference between set and reset points is adjustable over the full scale. DS has a single external adjustment and fixed deadband. Visible calibrated dial, on/off indication. SPDT snap-action or sealed mercury switches. Minimum deadband obtainable at any point in range. Ranges vacuum to 000 psig. U.L. and C.S.A. listed. Many models FM listed. GASKETED COVER FOR S 1-/ OPERATING S 1/ NPT 7/ [22.2] PHYSICAL DATA Max. Temperature: 10 F. For higher temperature media applications, a remote connection or siphon (pigtail) should be used. Connection: 1/9 NPT. (1/29 on range 1S). Housing: pressed steel with transparent cover. Wiring Connections: screw type. Wetted Parts: same as Bourdon tube material. Weight: lb. (std); lb. (wea-proof); lb. (exp-proof). Max. Press.: Max. adjustment operating range. Suggested Specification switch shall be Mercoid DA operated by a (brass) (type 1 stainless steel) (type 0 stainless steel) Bourdon tube actuating a (mercury switch) (snap-switch). shall have deadband fixed or adjustable up to a maximum of 100% of switch range. shall have calibrated dial and one or two pointers indicating set and reset points. shall have visible on/off indication. Setpoints shall be adjustable without removing switch cover or shutting down process. Types DAH, DRH, DSH 7-/ -1/2-1/2 (2) STD. 1/2 DIA. MOUNTING HOLES 2-9/1-7/ 10 1-/ U 7-7009-00 Customers tell us that this is the best pressure switch made. Our most popular, Model DA combines extremely high sensitivity and repeatability with easily adjustable set and reset points through non-interactive external adjustments. Visible calibrated dial for setpoints and on/off indicator to indicate switch actuation are included. Choose either high current snap-switch or hermetically sealed contact mercury switch. The DS Model has a fixed deadband. FEATURES 2-1/ [7.1] FM / TH D L CONTROL S / PIPE THD. 1/2 NPT HOLE 1-1/ STOCKED MODELS in bold SNAP ACTION SWITCH SPDT SNAP ACTION SWITCH SPDT MERCURY SWITCH SPDT 1A @ 120/20 VAC 1A @ 120/20 VAC A @ 120V., 2A @ 20V. AC/DC ADJUSTABLE OPERATING FIXED MINIMUM MINIMUM RANGE (PSIG) DEADBAND PSIG MODEL NUMBER DEADBAND PSIG MODEL NUMBER DEADBAND PSIG MODEL NUMBER 0-09 Hg. Vac. 9 Hg. Vac. DS-721-1-2* 99 Hg. Vac. DA-701-1-2* 29 Hg. Vac. DA-1-1-2* 1/-1 1. DS-721-1-1 DA-701-1-1 1 DA-1-1-1 1/-20 1. DS-721-1-A DA-701-1-A 1 DA-1-1-A 1-1. DS-721-1- DA-701-1- 1.7 DA-1-1- 2-0 2 DS-721-1- DA-701-1- DA-1-1- BRASS -100 2. DS-721-1- 9 DA-701-1-.7 DA-1-1- -10 DS-721-1-7 1 DA-701-1-7 DA-1-1-7 10-200 DS-721-1- 1 DA-701-1- DA-1-1- 10-00 DS-721-1-9 2 DA-701-1-9 12 DA-1-1-9 2-0 DS-7221-1-S 9 DA-7021-1-S DA-21-1-S -100. DS-7221-1-S 1 DA-7021-1-S DA-21-1-S 10-200 DS-7221-1-S 1 DA-7021-1-S DA-21-1-S 10-00 DS-7221-1-9S 19 DA-7021-1-9S 1 DA-21-1-9S 0SS 2-00 10 DS-7221-1-10S DA-7021-1-10S 2 DA-21-1-10S 100-100 0 DS-7221-1-12S 10 DA-7021-1-12S 90 DA-21-1-12S 00-000 200 DS-7221-1-1S* 900 DA-7021-1-1S* 0 DA-21-1-1S* 10-10 DS-721-1-2E 11 DA-701-1-2E DA-1-1-2E 1SS 10-00 DS-721-1-9E 2 DA-701-1-9E 1 DA-1-1-9E Additional features available on special order, include other electrical ratings and circuits, lower minimum differentials, special housings, diaphragm seals and manual reset. For severe vibration, a special Delrin Bushed Movement is available. *Range 2 and 1S not FM approved. Other ranges FM approved. For FM approved models specify DAF or DSF. Example DAF-1-1-1. BOURDON TUBE MATERIAL Northeast Controls Inc. Tel: 201-27-70 Fax: 201-27-22 sales@northeastcontrolsinc.com Upper Saddle River, New Jersey 07 USA
STOCKED MODELS in bold High Current Capacity or Extra Low Deadband Mercury es (SPST) MERCURY SWITCH SPST HIGH CURRENT MERCURY SWITCH SPST LOW DEADBAND BOURDON ADJUSTABLE 10A @ 120V., A @ 20V. AC/DC A @ 120VAC., 2A @ 20VAC., 2.A @ 120VDC TUBE OPERATING MINIMUM OPEN ON INC. CLOSE ON INC. MINIMUM OPEN ON INC. CLOSE ON INC. MATERIAL RANGE (PSIG) DEADBAND PSIG MODEL NUMBER MODEL NUMBER DEADBAND PSIG MODEL NUMBER MODEL NUMBER 0-0 Hg. Vac. 2 Hg. Vac. DA-1-2-2* DA-1--2* 1 Hg. Vac. DA-1-2-2* DA-1--2* 1/-1 1 DA-1-2-1 DA-1--1 0. DA-1-2-1 DA-1--1 1/-20 1 DA-1-2-A DA-1--A 0. DA-1-2-A DA-1--A 1-1.7 DA-1-2- DA-1-- 0.7 DA-1-2- DA-1-- BRASS 2-0 DA-1-2- DA-1-- 1.0 DA-1-2- DA-1-- -100.7 DA-1-2- DA-1-- 2.0 DA-1-2- DA-1-- -10 DA-1-2-7 DA-1--7.0 DA-1-2-7 DA-1--7 10-200 DA-1-2- DA-1--. DA-1-2- DA-1-- 10-00 1 DA-1-2-9 DA-1--9.0 DA-1-2-9 DA-1--9 2-0 DA-21-2-S DA-21--S 2. DA-21-2-S DA-21--S -100 DA-21-2-S DA-21--S.0 DA-21-2-S DA-21--S 10-200 DA-21-2-S DA-21--S.0 DA-21-2-S DA-21--S 0SS 10-00 1 DA-21-2-9S DA-21--9S 7 DA-21-2-9S DA-21--9S 2-00 2 DA-21-2-10S DA-21--10S 1 DA-21-2-10S DA-21--10S 100-100 90 DA-21-2-12S DA-21--12S 0 DA-21-2-12S DA-21--12S 00-000 0 DA-21-2-1S* DA-21--1S* 200 DA-21-2-1S* DA-21--1S* 1SS 10-10 DA-1-2-2E DA-1--2E.0 DA-1-2-2E DA-1--2E 10-00 1 DA-1-2-9E DA-1--9E.0 DA-1-2-9E DA-1--9E Also available in Weather-proof (DAW-) or Explosion-proof (DAH-1) Housings. *Range 2 and 1S not FM approved. Other ranges FM approved. For FM approved models specify DAF or DSF. Example DAF-1-2-1. STOCKED MODELS in bold Weather-proof Models SNAP ACTION SWITCH SPDT SNAP ACTION SWITCH SPDT MERCURY SWITCH SPDT Bourdon Adjustable 1A @ 120/20 VAC 1A @ 120/20 VAC A @ 120V., 2A @ 20V. AC/DC Tube Operating Fixed Minimum Minimum Material Range (PSIG) Deadband PSIG Model Number Deadband PSIG Model Number Deadband PSIG Model Number 0-0 Hg. Vac. Hg. Vac. DSW-72-1-2* 9 Hg. Vac. DAW-70-1-2* 2 Hg. Vac. DAW--1-2* 1/-1 1. DSW-72-1-1 DAW-70-1-1 1 DAW--1-1 1/-20 1. DSW-72-1-A DAW-70-1-A 1 DAW--1-A 1-1. DSW-72-1- DAW-70-1- 1.7 DAW--1- BRASS 2-0 2 DSW-72-1- DAW-70-1- DAW--1- -100 2. DSW-72-1- 9 DAW-70-1-.7 DAW--1- -10 DSW-72-1-7 1 DAW-70-1-7 DAW--1-7 10-200 DSW-72-1- 1 DAW-70-1- DAW--1-10-00 DSW-72-1-9 2 DAW-70-1-9 1 DAW--1-9 2-0 DSW-722-1-S 9 DAW-702-1-S DAW-2-1-S -100. DSW-722-1-S 1 DAW-702-1-S DAW-2-1-S 10-200 DSW-722-1-S 1 DAW-702-1-S DAW-2-1-S 0SS 10-00 DSW-722-1-9S 19 DAW-702-1-9S 1 DAW-2-1-9S 2-00 10 DSW-722-1-10S DAW-702-1-10S 2 DAW-2-1-10S 100-100 0 DSW-722-1-12S 10 DAW-702-1-12S 90 DAW-2-1-12S 00-000 200 DSW-722-1-1S* 900 DAW-702-1-1S* 0 DAW-2-1-1S* 1SS 10-10 DSW-72-1-2E 11 DAW-70-1-2E DAW--1-2E 10-00 DSW-72-1-9E 2 DAW-70-1-9E 1 DAW--1-9E *Range 2 and 1S not FM approved. All other DAW ranges are FM approved. POPULAR MODELS Explosion-proof Models SNAP ACTION SWITCH SPDT SNAP ACTION SWITCH SPDT MERCURY SWITCH SPDT BOURDON ADJUSTABLE 1A @ 120/20 VAC 1A @ 120/20 VAC A @ 120V., 2A @ 20V. AC/DC TUBE OPERATING FIXED MINIMUM MINIMUM MATERIAL RANGE (PSIG) DEADBAND PSIG MODEL NUMBER DEADBAND PSIG MODEL NUMBER DEADBAND PSIG MODEL NUMBER 0-0 Hg. Vac. Hg. Vac. DSH-721-1-2* 9 Hg. Vac. DAH-701-1-2* 2 Hg. Vac. DAH-1-1-2* 1/-1 1. DSH-721-1-1 DAH-701-1-1 1 DAH-1-1-1 1/-20 1. DSH-721-1-A DAH-701-1-A 1 DAH-1-1-A 1-1. DSH-721-1- DAH-701-1- 1.7 DAH-1-1- BRASS 2-0 2 DSH-721-1- DAH-701-1- DAH-1-1- -100 2. DSH-721-1- 9 DAH-701-1-.7 DAH-1-1- -10 DSH-721-1-7 1 DAH-701-1-7 DAH-1-1-7 10-200 DSH-721-1- 1 DAH-701-1- DAH-1-1- 10-00 DSH-721-1-9 2 DAH-701-1-9 1 DAH-1-1-9 2-0 DSH-7221-1-S 9 DAH-7021-1-S DAH-21-1-S -100. DSH-7221-1-S 1 DAH-7021-1-S DAH-21-1-S 10-200 DSH-7221-1-S 1 DAH-7021-1-S DAH-21-1-S 0SS 10-00 DSH-7221-1-9S 19 DAH-7021-1-9S 1 DAH-21-1-9S 2-00 10 DSH-7221-1-10S DAH-7021-1-10S 2 DAH-21-1-10S 100-100 0 DSH-7221-1-12S 10 DAH-7021-1-12S 90 DAH-21-1-12S 00-000 200 DSH-7221-1-1S* 900 DAH-7021-1-1S* 0 DAH-21-1-1S* 1SS 10-10 DSH-721-1-2E 11 DAH-701-1-2E DAH-1-1-2E 10-00 DSH-721-1-9E 2 DAH-701-1-9E 1 DAH-1-1-9E *Range 2 and 1S not FM approved. Other ranges FM approved. For FM approved models specify DAHF or DSHF. Example DAHF-1-1-1.
DA/DS Bourdon Tube es Type DA Adjustable Deadband, Fully Automatic, Double Adjustments DOUBLE S Snap Action Type DR Semi-Automatic, Manual Reset, RESET Manual Reset ( 2 or circuits only) SWITCH INDICATOR DOUBLE S SWITCH INDICATOR Mercury Contact Equipped with two external adjustments, one for setting high pressure operating point, the other for setting low pressure operating point. Deadband, or the difference between high and low setpoints, is adjustable over full scale. Mercoid s most popular operating mode, available on most D pressure and temperature controls. Type DS Fixed Deadband, Fully Automatic, Snap Action Mercury Contact Equipped with single adjustment for setting operating point only. A single pointer on scale sets pressure point at which switch action occurs. Fixed deadband is factory set and cannot be altered in the field. Available on series D-200, D-7200 and D-9200 only. Equipped with a single adjustment for setting operating point to operate the circuit automatically upon a pressure increase or decrease. Pushbutton reset must be operated manually to restore the circuit to original position after automatic operation. Suffix L, i.e. DR-1-1L denotes control will operate automatically on increase; suffix U denotes control will operate automatically on decrease. Type DL Semi-Automatic, Manual Lock Reset, RESET Manual Lock Reset ( 2 or circuits only) Equipped with a single adjustment for setting operating point. Control will operate at setpoint only upon a decrease in pressure. Manual lock feature permits circuit to be reset and locked in position. Lock remains in effect until pressure rises above control setting. Lock then releases and circuit is held in reset position until further automatic operation upon pressure decrease. Type D-00, DA-700 Two-Stage, Fully Automatic, 2 Set Pts. Provides two stage control by actuating one circuit upon a rise or fall in pressure and a second circuit on a further rise or fall. Each setpoint has a fixed deadband.
DA FEATURES External Setpoints Deadband Adjustable (over 100% of scale) or Fixed Visible Calibrated Dial, PSI/kg Visible Operation On/Off Indication Repeatability 1% of full scale Minimum Deadband Obtainable at any Point in Range Welded Stainless Steel Bourdon Tubes Provide Reduced Chance of Leakage in Case of Fire Ranges to 000 psig UL, CSA Listed (most models, features) Bourdon Tube es General Data and Accessories PHYSICAL DATA Max. Temp.: 10 F. For higher media applications, a remote connection or siphon (pigtail) should be used. Connection: 1/ NPT std. 1/2 NPT on range 1S, 1S Wetted Parts: Same as bourdon tube material except range 2K, 2K, 9K. Weight: lb. std., lb. weatherproof lb. exp. proof Max. Press.: Max. adjustment operating range. Use of a surge tank, snubber of capillary tubing connection is recommended where pulsation, pressure surge or water hammer may occur. Suggested Specification switch shall be Mercoid DA operated by a (brass) (type 1 stainless steel) (type 0 stainless steel) Bourdon tube actuating a (mercury switch) (snap-switch). shall have deadband adjustable up to a maximum of 100% of switch range. shall have calibrated dial and two pointers indicating set and reset points. shall have visible on/off indication. Setpoints shall be adjustable without removing switch cover or shutting down process. Mounting Flange For Surface Mounting (Field Installation) For DA, DAF, DS, DSF, DR, DRF and DL controls only. May be ordered separately for field installation. Part No. 17-2 (except on 1S, 1S) Part No. 17-1 (for range 1S, 1S only) Mounting Bracket For use with standard NEMA 1 enclosure general purpose controls only: DA, DAF, DS, DSF, DR, DRF, DL. Note: not adaptable for Range 1S and 1S. Part No. -2 Conduit Hub For 1/2 rigid conduit. Mercury switch type controls with standard general purpose NEMA-1 or optional weather-resistant NEMA- or NEMA- enclosures are suitable for Class 1, Div. 2 applications when ordered with this hub. Available for DA. Part No. 2-1 Breathers & Drains STANDARD BREATHER STANDARD DRAIN For Class I, Groups C, D and Class II, Groups E, F, G (water only). Mercoid s.s. drains are flame-tight, but not watertight which permits water to escape continuously. Mercoid s.s. breathers include a water shedding cap and provide effective case ventilation. For DAH, DAHF, DRH, DRHF, DSH, DSHF. Part No. 2-27 Standard drain. Part No. 2-27 Standard breather. For DAE, DRE. Part No. 2-27 Drain with 1/ connection. *Part No. 2-27 Standard breather with 1/2 connection. *Part No. 2-279 Reducer (/ to 1/2 ) for breather. *Breather and reducer must be ordered together. Miscellaneous Oxygen & Acetylene Service Spec. 2 Fungus Proof Spec. 2720 FM Approval DAF, DRF, DSF DELRIN* Bushed Movement B *Registered Trademark of E.I. DuPont de Nemours & Co. PIVOT POINT BEARINGS, TOP & BOTTOM, BUSHED WITH DELRIN SWITCH CARRIER STOP POST SLEEVED WITH DELRIN DELRIN PIN Factory Mutual Approved D es F M Cover Over External Adjustments DELRIN PIN BAR LINK DELRIN BRUSHED PIVOTAL END BEARING & BAR PIN OF DELRIN Remote Connections Pigtail Siphon Part No. 9-2HP ft. copper remote connection, 200 psig max. Part No. 9-210 12 ft. 1 s.s. connection with 0 s.s. fittings, 000 psig max. 1/ NPT Recommended for steam applications psig or higher. For D-0, D-0, D-20, D-700, D-720 pressure controls. Please specify. Part No. 2-2000 psig max. Provides longer service life for D pressure and temperature controls. Vibration and pulsation are the prime causes of control wear. Almost all types of vibration will have some effect on the life and continued accuracy of controls. To offset the wearing of metal surfaces found in bearings and pivot points, the control mechanism is designed to incorporate Delrin bushed movements at each possible wear point. Also for environments where corrosion may be a factor. Add Letter B After Type and Suffix Nos. Example: DS-221-2B, DA-1-B, DAH-1-B. 7
General Purpose Types DA, DS, DR, DL Drawing No. 1000B HOLES FOR FLANGE SCREWS 1/2 -/ DIA. DA22 DA2 DA2 DA21 DA1 DA1 1-1/2 DA Bourdon Tube es Control Dimensions 1/ NPT 1-1/ 1/ NPT [«\«1 Weather-Proof Types DAW, DSW, DRW Drawing No. 102 7 DIA. REAR FLANGE MOUNTING HOLES () 1/ NPT [\««1 S GASKETED COVER 2-1/1 1/2 HUB Types DAH, DRH, DSH Drawing No. 10-1/2 BREATHER (OPTIONAL) 9-7/ 7-/ MOUNTING HOLES (OPTIONAL) 1/2 DIA. 1/2 NPT 1/ NPT / *Consult factory for Cenelec approved DAH models. Diaphragm Seal Types MSAG Drawing No. 20 Flange for Surface Mounting Drawing No. 1000F PN 17-20 (2) DA2 DA DA Types DAE, DRE, DSE Drawing No. 9D 10-1/1 DIA. 7-/ -9/1-1/2 DIA. BACK S 10-11/1 9-1/ 2-/1 DIA. 1/ NPT FLUSHING PROCESS 1/, 1/2, 1, 1-1/2 NPT 1/ DIA. DA2 DA DA BOTTOM 1/ NPT 7/ MOUNTING HOLES () (1.) 1/2 NPT Connection for ranges 1S, 1S (2.) Use PN 17-1 for ranges 1S, 1S General Purpose NEMA 1 Enclosure For indoor use and other general purpose applications under normal atmospheric conditions. Provides protection against dust and light splashing. Heavy gauge plain steel case. Flanged case available. Transparent cover for visible on-off operation. Locking device prevents tampering. connection, 1/ NPT. Electrical connection back of case for 1/2 conduit or BX. Shipping wt. lbs. See above for dimensions. Furnished as standard unless otherwise specified. Watertight, Dust-tight/ Type W NEMA S,, & X Enclosure For outdoor or indoor applications. Complies with hose test and requirements for watertight, dust-tight, drip-tight weatherproof, weather-resistant, splash-proof, sleet-proof, and moisture-resistant. Flanged, heavy gauge steel case with transparent cover for visible on-off operation. External adjustments protected by cover. Bottom pressure connection. 1/ NPT. Electrical connection back of case for 1/2 conduit, removable 1/2 hub. Shipping wt. lbs. See above for dimensions. Optional, add W to prefix, i.e. DAW, DRW, DSW, when ordering. Explosion- Proof Type H Hazardous Area Enclosure suitable for Class I, Groups C & D, Class II, Groups E, F & G; NEMA 7 & 9 applications. Control mechanism is an integral part of enclosure and cannot be replaced in the field. For surface, panel or pipe mounting. Aluminum case with glass window in cover for visible on-off operation. Bottom pressure connection, 1/2 NPT male 1/ NPT female. External adjustments. Available with breather and drain. Shipping wt. lbs. (. kg.). See above for dimensions. Optional housing, to order add H to prefix. Example: DAH, DRH, or DSH. Not available on D0. NOTE: Standard general purpose NEMA 1 and NEMA enclosures are suitable for Class I, Division 2 applications with addition of conduit hub (mercury switch models only).