BOILER CONTROLS. Hot Water Boilers. How to Select Low Water Cut-Offs for Hot Water Boilers

Transcription

1 OILR ONTROLS ot Water oilers OILR ONTROLS Mconnell & Miller Low Water cut-offs are specially designed to protect hot water boilers from the hazards of a low water condition. In operation they will interrupt the electrical current to the firing device, if the water in the system drops below the boiler manufacturer s minimum safe water level. Our low water cut-offs also provide an additional circuit for a low water alarm, should you desire to install one, for additional protection. ow to Select Low Water ut-offs for ot Water oilers oiler pressure and the method of mounting are the primary factors to consider when selecting a low water cut-off. Maximum Method of Installation low own Valve oiler irectly into Pressure oiler Tappings To Piping bove the Provided with psi (kg/cm 2 ) OR on the oiler oiler with " (25mm) Product Size Low Water Supply Riser* qualizing Piping Series Required ut-off 50 (.5) 60 () X R-24 X 64-4 No N/ X 6 Yes No X 64 Yes No Yes Yes X Yes No X 850 X R-20 X R (-8) X 750/750P * Use the tapping designated by the boiler manufacturer for low water cut-off installation. 4 No N/ 4 No N/ 4 No N/ 4 - No N/ 0

2 OILR ONTROLS Steam oilers Mconnell & Miller Low Water ut-offs are specially designed to protect steam boilers from the hazards of a low water condition. In operation they will interrupt the electrical current to the firing device, if the water in the system drops below the boiler manufacturers minimum safe water level. Our low water cut-offs also provide an additional circuit for a water feeder or a low water alarm, should you desire to install one, for additional protection. ow to Select Low Water ut-offs for Steam oilers oiler pressure and the method of installation are the primary factors to consider when selecting a low water cut-off. We recommend that secondary (redundant) Low Water ut-off controls be installed on all steam boilers with heat input greater than 400,000 TU/hour or operating above 5 psi of steam pressure. t least two controls should be connected in series with the burner control circuit to provide safety redundancy protection should the boiler experience a low water condition. Moreover, at each annual outage, the low water cut-offs should be dismantled, inspected, cleaned, and checked for proper calibration and performance. OILR ONTROLS Maximum Method of Installation low own Valve oiler onnect to the Provided with Pressure irectly into oiler with " Product Size Low Water psi (kg/cm 2 ) oiler Tappings* qualizing Piping Series Required ut-off 5 () X PS-800 X 750/P X 67 4 No N/ 4 No N/ X 6 Yes No Yes Yes 20 (.4) X Yes Yes 50 (.5) 50 (0.5) X 69 2 No N/ X 70 2 Yes No X 70-2 Yes Yes X 64- X 6 Yes No X 64 Yes No Yes Yes X Yes No X 9/9 Yes No X 50/50S/50 Yes No X 57/57S/57 Yes No 250 (8) 4 94/94 4 Yes No X 750-/4 Yes No * Use the tapping designated by the boiler manufacturer for low water cut-off installation.

3 OILR ONTROLS ow to Select ontrols onversion actors OILR ONTROLS STM OILRS Steam eating oilers are classified as boilers in closed heating systems where all condensate is returned to the boiler. est recommendation for all automatically fired boilers is a feeder cut-off combination. It adds water as needed to maintain a safe operating level, and stands by to interrupt circuit to burner if water level drops into emergency zone. Steam Process oilers are classified as boilers in systems where not all the condensate is returned, and some make-up water is needed. separate feeder and separate cut-off are recommended, so operating levels can be set for the wider differential required in such service. Selection of the correct feeder cut-off combination, or feeder depends upon:. Maximum boiler pressure. 2. ifferential between water supply pressure and the pressure setting of the steam safety valve.. oiler size OT WTR OILRS est recommendation for all automatically fired boilers is a feeder cut-off combination. It adds water if needed to match the discharge capacity of the relief valve, and stands by to interrupt circuit to burner if water level drops into emergency zone. Selection of the correct feeder cut-off combination, or feeder depends upon:. Maximum boiler pressure. 2. ifferential between water supply pressure and the pressure setting of the safety relief valve.. oiler size oiler orsepower (P) = allons of Water TU R TU = = = = R 9 Lbs. of Water 8. R x 240 TU 240 P x,479 oiler Steaming Rate (allons Per Minute) R PM = 2000 PM = (P) x PM = PM = TU 480,000 R x oiler Rating TU P R ond. Lb./r, , , ,06 7.5, ,750 0, ,48 2.5, ,25 5 2, , , , , ,875 25,500 86,004, ,200,05,7, ,900,208,9, ,600,80,506, ,00,55,67, ,000,725 2 Pounds of condensate per hour = R 4 Water eeders and ombination Water eeders/low Water ut-offs Mconnell & Miller oiler Water eeders and eeder ut- Off ombinations are used to provide automatic operation, and to safeguard steam and hot water boilers against the hazards of a low water condition. feeder cut-off combination mechanically adds water as needed to maintain the required minimum water level, and electrically stops the firing device in case of an emergency.

4 OILR ONTROLS ow to Select Water eeders (continued) Steam oilers oiler Size Maximum (Mfr. ross Rating Sq. t. of R) oiler Series haracteristics Pressure *ifferential Pressure psi (kg/cm 2 ) psi (kg/cm 2 ) 0 (.7) 20 (.4) 0 (2.) 40 (2.8) 50 (.5) 60 (4.2) 70 (4.9) Uni-Match or utomatic ired 5 (.0) eating oilers ll oilers up to 2,000 sq. ft. 0 or utomatic ired 25 (.8) eating oilers ll oilers up to 5,000 sq. ft. 47 or eating or 25 (.8) Process oilers ll oilers up to 5,000 sq. ft or utomatic ired 25 (.8) eating oilers ll oilers up to 5,000 sq. ft. 247 or eating or 0 (2.) Process oilers ll oilers up to 5,000 sq. ft or utomatic ired 0 (2.) eating oilers ll oilers up to 5,000 sq. ft. 5 or eating or 5 (2.5) 8,600 2,000 5,000 7,600 20,000 2,800 2,400 Process oilers 5-2 or utomatic ired 5 (2.5) 8,600 2,000 5,000 7,600 20,000 2,800 2,400 eating oilers 5S or eating or 5 (2.5) 0,500 7,500 22,400 26,500 0,000 2,600 5,000 Process oilers 5S-2 or utomatic ired 5 (2.5) 0,500 7,500 22,400 26,500 0,000 2,600 5,000 eating oilers 5 or eating or 75 (5.) 8,600,600 4,600 7,000 8,800 20,600 22,00 Process oilers 5-2 or utomatic ired 75 (5.) 8,600,600 4,600 7,000 8,800 20,600 22,00 eating oilers *ifferential pressure should be based on water supply pressure at boiler, minus pressure setting of steam safety valve OILR ONTROLS

5 OILR ONTROLS Low Water ut-offs lectronic or ot Water and Steam oilers OILR ONTROLS Series 750 Low Water ut-offs with Remote Sensor or commercial or industrial applications Primary or secondary control on hot water boilers Secondary control (manual reset models only) on steam boilers Manual reset models meet the requirements of SM Standard S-. If the control is in a low water condition when there is an interruption of power, the control will remain in a low water condition when power is restored. The reset button will need to be pressed when the water level is restored to a level above the probe to allow the burner to fire. reen L power indicating light Red L low water indicating light Test switch 20,000 ohms sensitivity Knockouts on rear of chassis for direct mounting Options: - Manual reset button - 750P-MT model includes P-800 probe - 750P-MT-U model includes P-800-U probe NM enclosure Maximum ambient temperature 20 (49 ) Series 750 ontrol Unit 750P-MT P-MT-U-20 (Remote sensor must be ordered separately (see page 82-85) Number Number escription lbs. (kg) 750-T uto reset 2 (.9) 750-MT Manual reset 2 (.9) 750P-MT Manual reset and P-800 probe 2.5 (.9) 750P-MT-U Manual reset and P-800-U probe 2.5 (.9) lectrical Ratings Motor Switch Rating (mperes) Voltage ull Load Locked Rotor Pilot uty 20 V V at 20 or 240 V 240 V or 60 z imensions, in. (mm) Std. U Std U 6 8 (62) 5 8 (0) (65) 9 6 (40) 6 (78) 2 8 (54) 9 6 (40) 4 4 (20) 4

6 OILR ONTROLS Low Water ut-offs lectronic or ot Water and Steam oilers Series 750 onductance ctuated Level ontrols /4" or commercial or industrial applications Low water cut-off, pump on, pump off, or high level alarm 5/6" 2 /6" 24 V and 20 V models Panel and plug-in modular mount electronics LWO eed Water/Pump ontrol ual and Tri-unctions utomatic or manual reset option on each board Maximum circuit board ambient temperature 50 (5 ) 26,000 ohm sensitivity Manual reset models meet the requirements of SM Standard S-. If the control is in a low water condition when there is an interruption of power, the control will remain in a low water condition when power is restored. The reset button will need to be pressed when the water level is restored to a level above the probe to allow the burner to fire. Module 2 /2" 5/8" /4" Module on Socket 2 /6" /4" 7/2" TRNSORMR 2 /2" OILR ONTROLS. Select and order panel mount or plug-in module 750 control unit. 2. Select and order appropriate chamber based on the number of levels to be sensed. (Order sensor chamber and probes separately (see page 82-85) Single unction Panel Mount " Panel Mount Number Number escription lbs. (kg) Panel Mount 750-L Low water cut-off 0.5 (0.2) 750-L Low water cut-off 0.5 (0.2) 750-P-20-I 7604 Pump controller 0.5 (0.2) 750-LP-20-I ual LWO & Pump controller 0.6 (0.) 750-LP-20-I LWO & Pump controller 0.6 (0.) Plug-In Module 750M-L Low water cut-off 0.6 (0.) 750M-L Low water cut-off 0.6 (0.) 750M-P-20-I 7609 Pump controller 0.6 (0.) Plug-In Module Sockets 750M-8PS 760 ight pin socket 0. (0.) 750M-PS 76 leven pin socket 0. (0.) daptor P adaptor plate kit 0. (0.) ual unction 2 /2" 5/8" /6" 4 /8" 4" /4" Transformer " /4" ual unction /6" lectrical Ratings Switch ontact Ratings Model Voltage ull Load Locked Rotor " /8" 2 /8" Transformer 5 /6" 4 /8" /4" 24 V 24 V 20 V V 240 V Tri-unction Tri-unction 5

7 OILR ONTROLS OILR ONTROLS Low Water ut-offs lectronic or Steam oilers New and Improved Series PS-800 Low Water ut-offs or residential and commercial applications lectronic operation New eatures: User-friendly diagnostics - Red low water and shorted probe L - reen power and test L igher probe sensitivity: 7,000 ohms No lock out with loss of power if probe is in water elay on Make (OM) feature (5 seconds) elay on reak (O) feature (0 seconds) No blow down of control required when mounted directly into boiler tappings Test button standard on all models Options available include Manual reset xtended barrel, remote and short probe models 20 volt and 24 volt models (24 volt models meet NSI specification Z2.a) Power consumption.7 V Provisions to add alarm or automatic water feeder Maximum ambient temperature 20 (49 ) Maximum steam pressure 5 psi ( kg/cm 2 ) Maximum water temperature 250 (2 ) Series PS-800 lectrical Ratings Motor Switch Rating (mperes) Model Voltage ull Load Locked Rotor Pilot uty 24 V 24 V 50 V at 24 V 20 V 20 V V at 20 or 240 V 240 V or 60 z K imensions, in. (mm) K ll U Std SP RX2 U ll RX 4 4 (08) 9 6 (40) 6 (78) 2 8 (54) 8 (5) 2 8 (54) 9 6 (40) 4 (20) 6 (2) 5 6 (48) 8 (5) (7) 7 8 (22) Number Number escription lbs. (kg) PS Low water cut-off 20V 2.7 (.2) PS-80-M PS w/manual reset 2.7 (.2) PS-80-U PS w/ext. barrel 2.7 (.2) PS-80-M-U PS w/ext. barrel 2.7 (.2) & manual reset PS Low water cut-off 24V 2.7 (.2) PS-802-M PS w/manual reset 2.7 (.2) PS-802-U PS w/ext. barrel 2.7 (.2) PS-802-M-U PS w/ext. barrel 2.7 (.2) & manual reset PS-802-RX PS w/remote sensor 2.7 (.2) UTION o not use manual reset models with electric automatic water feeders. ailure to follow this caution can cause flooding and property damage. 6

8 OILR ONTROLS Low Water ut-offs lectronic or ot Water oilers New and Improved Series PS-850 Low Water ut-offs or residential, commercial and industrial applications lectronic operation New eatures: User-friendly diagnostics - Red low water and shorted probe L - reen power and test L igher probe sensitivity: 7,000 ohms No lock out with loss of power if probe is in water No blow down of control required when mounted directly into boiler tappings Test button stamdard on all models Options available include Manual reset xtended barrel, remote and short probe models 20 volt and 24 volt models (24 volt models meet NSI specification Z2.a) Power consumption.7 V Provisions to add alarm Maximum ambient temperature 20 (49 ) Maximum water pressure 60 psi (.2 kg/cm 2 ) Maximum water temperature 250 (2 ) lectrical Ratings Switch Rating (mperes) Model Voltage ull Load Locked Rotor Pilot uty 24 V 24 V 50 V at 24 V 20 V 20 V V at 20 or 240 V 240 V or 60 z Series PS-850 Number Number escription lbs. (kg) PS Low water cut-off 20V 2.7 (.2) PS-85-U PS w/extended 2.7 (.2) barrel PS-85-M PS w/manual reset 2.7 (.2) PS-85-M-U PS w/extended 2.7 (.2) barrel & manual reset PS-85-RX PS w/remote probe 2.7 (.2) PS-85-M-RX PS w/remote probe 2.7 (.2) & manual reset PS-85-SP PS w/short probe 2.7 (.2) PS-85-SP-M PS w/short probe 2.7 (.2) & manual reset PS Low water cut-off 24V 2.7 (.2) PS-852-M PS w/manual reset 2.7 (.2) PS-852-SP PS w/short probe 2.7 (.2) PS-852-SP-M PS w/short probe 2.7 (.2) & manual reset K OILR ONTROLS imensions, in. (mm) K ll U Std SP RX2 U ll RX 4 4 (08) 9 6 (40) 6 (78) 2 8 ( 54 ) 8 (5) 2 8 (54) 9 6 (40) 4 (20) 6 (2) 5 6 (48) 8 (5) 4 (20) (25) (7) 7 8 (22) UTION o not use manual reset models with electric automatic water feeders. ailure to follow this caution can cause flooding and property damage. 7

9 OILR ONTROLS Low Water ut-offs lectronic or ot Water oilers R-24 Low Water ut-offs or residential applications ompact size OILR ONTROLS asy to install and wire utomatic reset feature resumes operation after a power outage when water is on probe reen power on indicating L Red low water indicating L Solid state operation 5,000 ohms probe sensitivity Model R-24 Maximum ambient temperature 20 (49 ) Maximum water temperature 250 (2 ) Maximum water pressure 50 psi (.5 kg/cm 2 ) ft. harness cable included lectrical Ratings Voltage Power Load Switching onsumption 24 V 2.5 V 2 at 24 V Note: 5 m minimum current draw is required. imensions, in. (mm) 4 4 (9) 4 (9) (76) 4 (9) Number Number escription lbs. (kg) R Residential low water cut-off.7 (.2) 8

10 OILR ONTROLS Low Water ut-offs lectronic or ot Water oilers R-22 Low Water ut-offs or residential and (where codes allow) commercial applications lectronic operation asy to install and wire Red low water indicating L reen power indicating L utomatic reset No blow down required 5,000 ohms probe sensitivity Series R-22 OILR ONTROLS Maximum ambient temperature 20 (49 ) Maximum water temperature 250 (2 ) Maximum water pressure 60 psi (.2 kg/cm 2 ) lectrical Ratings Voltage Power Load Switching onsumption 20 V 5 V 5.8 at 20 V imensions, in. (mm) 2 4 (70) 5 8 (5) 8 (5) 4 (20) 7 8 (22) 7 6 (87) 4 6 (8) Number Number escription lbs. (kg) R Low water cut-off.7 (.78) 9

11 OILR ONTROLS Low Water ut-offs lectronic or ot Water oilers R-20 Low Water ut-offs or residential and (where codes allow) commercial applications lectro-mechanical operation OILR ONTROLS utomatic reset feature resumes operation after a power outage when water is on probe No blow down required 6,000 ohms probe sensitivity Maximum ambient temperature 20 (49 ) Maximum water temperature 250 (2 ) Series R-20 Maximum water pressure 60 psi (.2 kg/cm 2 ) lectrical Ratings Voltage Power Load Switching onsumption 20 V 5 V 5.8 at 20 V imensions, in. (mm) 6 8 (62) 5 8 (0) (65) 5 8 (4) 8 (5) 4 (20) 7 8 Number Number escription lbs. (kg) R Low water cut-off.8 (.7) 40

12 OILR ONTROLS Low Water ut-offs lectronic ombination Low Water ut-off/pump ontrollers for Steam oilers Series 50 Primary and secondary low water fuel cut-off protection and pump control for commercial and industrial steam boilers Motorized valve controller, low water cut-off, high water cut-off, and alarm actuators for boilers, vessels and tanks Set points and differentials remain constant throughout pressure range iagnostic features incorporated in the control include: igh ambient temperature protection Internal Ls that indicate water position and condition xternal Ls that indicate control activity Replacement head assemblies available for Model 50 and 50S Series upgrade ontrol unit can be mounted remotely from probes djustable 60-second burner-off time delays djustable /4 or -/6 pump differentials P burner and pump relays NM enclosure Maximum ambient temperature 5 (57 ) Maximum operating pressure 50 psi (0.5 kg/cm 2 ) Maximum operating temperature 66 (85 ) at probes Manual reset models meet the requirements of SM Standard S-. If the control is in a low water condition when there is an interruption of power, the control will remain in a low water condition when power is restored. The reset button will need to be pressed when the water level is restored to a level above the probe to allow the burner to fire. Series 50 UT O LVL Series 50 imensions, in. (mm) 6 6 (69) 5 6 (286) 6 (52) 4 6 (59) 5 6 (84) (275) 4 8 (05) 7 6 (87) L UT-O LVL OILR ONTROLS K Series 57 Number Number escription lbs. (kg.) ombination low water 22.9 (0.4) cut-off/pump controller 50-M w/manual reset 22.9 (0.4) w/water column 6.9 (6.7) 57-M w/manual reset 6.9 (6.7) Series 57 imensions, in. (mm) (62) (59) (25) K L (9) 6 (406) (292) (89) (49) lectrical Rating and Switch Ratings Supply Probe ull load (mps) Locked Rotor (mps) Pilot uty (V) Motor (P) Voltage Voltage NO (N), (V) NO (N), (V) NO (N), (V) NO (N), (V) 20 V 5 V 6 (5.8), (4.8), (290), 20 (/4), 20 50/60z Maximum 8 (4.9), (7.4), (290), (/2), 240 4

13 OILR ONTROLS Low Water ut-offs Mechanical or Steam oilers Series 6 Low Water ut-offs or residential and commercial low pressure steam boiler applications or boilers of any steaming capacity djustable X outlet for easy installation OILR ONTROLS ual precision switches for dependable operation of the low water cut-off and alarm or electric water feeder Packless bellows " equalizing pipes and blow down valve required Maximum steam pressure 20 psi (.4 kg/cm 2 ) Series 6 UT-O LVL lectrical Ratings Motor Switch Rating (mperes) 20 V. mp, 240 V.5 mp Voltage ull Load Locked Rotor Pilot uty 20 V V at V or 240 V imensions, in. (mm) (252) (89) 6 (65) 8 (79) 5 8 (0) Number Number escription lbs. (kg) Low water cut-off.5 (6.) w/spt threads 5.0 (6.8) 42

14 OILR ONTROLS Low Water ut-offs Mechanical or Steam and ot Water oilers Series 6 Low Water ut-offs or residential, commercial, and industrial applications eavy duty Includes No. 2 switch Optional manual reset available Maximum boiler pressure 50 psi (.5 kg/cm 2 ) Use with T-4 on hot water systems Series 6 UT O LVL OILR ONTROLS lectrical Ratings Motor Switch Rating (mperes) 20 V.5 mp Voltage ull Load Locked Rotor Pilot uty 20 V V at 20 or 240 V 240 V z imensions, in. (mm) 6 (65) (65) 5 5 () 9 8 (28) 8 (79) 0 (267) 5 8 (0) Number Number escription lbs. (kg) Low water cut-off.5 (6.) w/ float block 5.0 (6.8) 6-M w/float block & manual reset 5.0 (6.8) w/spt threads 4.0 (6.4) 6-M w/manual reset 4.0 (6.4) 6-P w/" plug 4.0 (6.4) 6-M w/manual reset 4.0 (6.4) w/pt switch 4. (6.5) 4

15 OILR ONTROLS Low Water ut-offs Mechanical or Steam and ot Water oilers Series 64 Low Water ut-offs or residential, commercial, and industrial boiler applications of any steaming capacity eavy uty djustable X outlet for easy installation OILR ONTROLS ual precision switches for dependable operation of the low water cut-off and alarm or electric water feeder Packless bellows Optional manual reset available " (25mm) equalizing pipes required Maximum boiler pressure 50 psi (.5 kg/cm 2 ) SRIS 64 UT-O LVL Use with T-4 on hot water systems imensions, in. (mm) (252) (65) 6 (65) 8 (79) Model 64- Low Water ut-offs Quick hook-up fittings provided for installation directly into gauge glass tappings UT-O LVL Model 64- imensions, in. (mm) min. max (66) (252) 4 () (72) 8 (9) 8 (79) Number Number escription lbs. (kg) Low water cut-off. (5.) w/quick hook-up fittings 8. (8.) w/float block.5 (5.2) 64-M w/manual reset 2.5 (5.7) lectrical Ratings Motor Switch Rating (mperes) Voltage ull Load Locked Rotor Pilot uty 20 V V at V or 240 V 44

16 OILR ONTROLS Low Water ut-offs Mechanical or Steam and ot Water oilers Series 764 Low Water ut-offs or residential, commercial, and industrial boiler applications of any steaming capacity eavy duty djustable X outlet for easy installation ual precision switches for dependable operation of the low water cut-off and alarm or electric water feeder Packless bellows 2 " side tapping provided for installation with close nipple Maximum boiler pressure 50 psi (.5 kg/cm 2 ) Series 764 UT O LVL OILR ONTROLS lectrical Ratings Motor Switch Rating (mperes) Voltage ull Load Locked Rotor Pilot uty 20 V V at V or 240 V imensions, in. (mm) (75) 6 (65) 8 (79) 2 Number Number escription lbs. (kg) Low water cut-off 2.5 (5.7) 45

17 OILR ONTROLS Low Water ut-offs Mechanical or Steam oilers Series 67 Low Water ut-offs or residential and commercial applications or boilers of any steaming capacity K OILR ONTROLS Quick hook-up fittings provided Lever-operated, full port ball valve for easy blow down djustable X outlet for easy installation ual precision switches for dependable operation of the low water cut-off and alarm or electric water feeder Optional features Low voltage switches for self-generating millivolt circuits Manual reset switch Series 67 Max Swing L M N Large float chamber Maximum steam pressure 20 psi (.4 kg/cm 2 ) K lectrical Ratings Motor Switch Rating (mperes) Voltage ull Load Locked Rotor Pilot uty 20 V V at V or 240 V Model 67-LQU (without quick hook-up fittings) Max Swing M N imensions, in. (mm) K L M N min. max. 6 (65) 4 (56) 4 (45) 4 4 (2) 8 (86) 8 (29) (40) (247) 9 6 (90) 2 (64) 2 6 (7) Number Number escription lbs. (kg) Low water cut-off 0 (4.5) for millivolt service 0 (4.5) 67-LQU without quick hook-up fittings 8 (.6) 67-M w/manual reset 0 (4.5) 46

18 OILR ONTROLS Low Water ut-offs Mechanical or Steam oilers Series 767 Low Water ut-offs or residential and commercial low pressure boiler applications or boilers of any steaming capacity 2 " body tapping for side mounting on boilers Lever-operated, full port ball valve for easy blow down djustable X outlet for easy installation ual precision switches for dependable operation of the low water cut-off and alarm or electric water feeder Large float chamber Maximum steam pressure 20 psi (.4 kg/cm 2 ) Series 767 N P (Max. Swing) K L M OILR ONTROLS lectrical Ratings Motor Switch Rating (mperes) Voltage ull Load Locked Rotor Pilot uty 20 V V at V or 240 V imensions, in. (mm) K L M N P 5 (29.) (86.5) (7) 5 8 (7) (5.9) 5 8 (92) 8 5 (207) 9 6 (246.6) 5 (40) Number Number escription lbs. (kg) Low water cut-off 8.5 (.9) 47

19 OILR ONTROLS Low Water ut-offs Mechanical or Steam oilers Series 69 uilt-in Low Water ut-offs or residential and commercial low pressure steam boiler applications OILR ONTROLS or boilers of any steaming capacity or mounting in 2 " boiler side tappings Insertion lengths available in 6-4 8" (0-05mm) Packless bellows djustable X outlet for easy installation ual precision switches for dependable operation of the low water cut-off and an alarm or electric water feeder Optional low voltage switches for self-generating millivolt circuits Series 69 UT-O LVL 2 4 Maximum steam pressure 20 psi (.4 kg/cm 2 ) lectrical Ratings Motor Switch Rating (mperes) Voltage ull Load Locked Rotor Pilot uty 20 V V at V or 240 V imensions, in. (mm) Insertion Model Length (05) 69 8 (79) (57) (25) 4 8 (05) 69 4 (45) 469, (0) 8 () 2 9 (24) Number Number escription lbs. (kg) Low water cut-off w/4 8" (05mm).7 (.7) insertion length w/spt threads.7 (.7) 69-MV-P w/millivolt switch 4.0 (.8) w/ 8" (79mm) insertion length 4.0 (.8) w/2 4" (57mm) insertion length 4.0 (.8) w/ 4" (45mm) insertion length 4.0 (.8) 69-MV w/millivolt switch 4.0 (.8) w/ 6" (0mm) insertion length 4.0 (.8) w/ 6" (0mm) insertion length 4.0 (.8) w/ 4" tapping 48

20 OILR ONTROLS Low Water ut-offs Mechanical or Steam oilers Series 70 uilt-in Low Water ut-offs or residential and commercial low pressure boiler applications or boilers of any steaming capacity or mounting in 2 " boiler side tappings djustable X outlet for easy installation ual precision switches for dependable operation of the low water cut-off and alarm or electric water feeder loat chamber provided 4" pressure control tapping provided Maximum steam pressure 20 psi (.4 kg/cm 2 ) imensions, in. (mm) Series 70 UT-O LVL OILR ONTROLS K 4 (4) 2 4 (76) (25) 4 8 (05) K L M 4 L 2 8 (60) 9 6 (249) 4 (8) 5 6 (29) 2 8 (60) M Model 70- Low Water ut-offs Lever-operated, full port ball valve for easy blow down imensions, in. (mm) K 4 (4) 2 K L M N 2 (64) 2 6 (7) 9 6 (249) 7 (78) 4 (8) 5 (40) lectrical Ratings 4 (76) (25) 4 8 (05) 4 Model 70- UT-O LVL Motor Switch Rating (mperes) Voltage ull Load Locked Rotor Pilot uty 20 V V at V or 240 V L M Number Number escription lbs. (kg) Low water cut-off 6.7 (.0) w/blow down valve 8.0 (.6) N (max. swing) 49

21 OILR ONTROLS Low Water ut-offs Mechanical ombination Low Water ut-off/pump ontrollers for Steam oilers Series 42 Low Water ut-off/pump ontrollers OILR ONTROLS or residential, commercial, and industrial low and medium pressure steam boilers with a separate water column or boilers of any steaming capacity Monel bellows provides corrosion resistance Single pole, single throw mercury switches nclosed junction box protects switches Optional features Quick hook-up fittings auge glass connector SPT threads Maximum pressure 50 psi (.5 kg/cm 2 ) SRIS 42 UT-O LVL lectrical Ratings T Pump ircuit Rating (mperes) Voltage ull Load Locked Rotor Pilot uty 20 V V at 240 V or 240 V UT-O LVL larm ircuit Rating (mperes) Voltage mps MOL V 240 V /2 Number Number escription lbs. (kg) Q N P M S ombination low water cut-off/ 5.5 (7.0) pump controller w/quick hook-up fittings 2. (9.7) w/spt threads 5.5 (7.0) 42-N w/glass connector 2. (9.7) MOL 42-N L K UT-O LVL R imensions, in. (mm) Model () (65) (225) 6 (94) 8 (79) () (65) (84-47) 2 4 (45) 8 (79) 42-N 2 4 () (65) (225) 6 (94) 8 (79) Model K L M N P Q R S T 42-N (65) (65) 4 (45) 6 (94) 6 (46) 6 (27) 6 (27) (8) (67) 50

22 OILR ONTROLS Low Water ut-offs ombination Low Water ut-off/pump ontrollers for Steam oilers Series 42S Low Water ut-off/pump ontrollers with MRURY R Snap-ction Switches or residential, commercial, and industrial low and medium pressure steam boilers with a separate water column or boilers of any steaming capacity Monel bellows provides corrosion resistance Single pole, single throw snap action switches nclosed junction box protects switches Optional features Quick hook-up fittings auge glass connector Maximum pressure 50 psi (.5 kg/cm 2 ) SRIS 42S UT-O LVL OILR ONTROLS lectrical Ratings T Pump ircuit Rating (mperes) Voltage ull Load Locked Rotor Pilot uty 20 V V at 240 V or 240 V UT-O LVL Voltage larm ircuit Rating (mperes) mps MOL 42S- 20 V 240 V /2 Number Number escription lbs. (kg) 42S 2902 ombination low water cut-off/ 5.5 (7.0) pump controller 42S S w/" SPT threads 5.5 (7.0) 42S S w/quick hook-up fittings 2. (9.7) 42S-N S w/glass connector 2. (9.7) MOL 42S-N L K Q N P M UT-O LVL S R imensions, in. (mm) Model 42S 2 4 () (65) (225) 6 (94) 8 (79) 42S- 2 4 () (65) (84-47) 2 4 (45) 8 (79) 42S-N 2 4 () (65) (225) 6 (94) 8 (79) Model K L M N P Q R S T 42S-N (65) (65) 4 (45) 6 (94) 6 (46) 6 (27) 6 (27) (8) (67) 5

23 OILR ONTROLS Low Water ut-offs Mechanical or Steam oilers Series 50 Low Water ut-off/pump ontrollers or commercial and industrial low or high pressure boiler applications or boilers of any steaming capacity OILR ONTROLS Monel bellows provides corrosion resistance Mercury switches for high temperature service Single pole, single throw switch for pump control Single pole, double throw switch for low water cut-off and alarm actuation Optional features Manual reset 2 Single pole, single throw switches 2 Single pole, double throw switches loat block SPT threads Maximum pressure 50 psi (0.5 kg/cm 2 ) Series 50 UT-O LVL or new electronic 50 Series see page 4 Model 50-M Maximum differential operation Prevents nuisance burner shutdowns in low pressure applications Maximum operating pressure 50 psi (.5 kg/cm 2 ) UT-O LVL or additional information see page 56 lectrical Ratings ut-off and Pump ircuits Rating (mperes) Voltage ull Load Locked Rotor Pilot uty 20 V V at 240 V or 240 V larm ircuit Rating (mperes) Voltage mps 20 V 240 V /2 Number Number escription lbs. (kg) ombination low water cut-off/ 24.7 (.2) pump controller w/float block 24.7 (.2) 50--M w/manual reset 24.7 (.2) w/spt threads 24.7 (.2) 50-M w/maximum differential 24.7 (.2) 50-M w/manual reset 24.7 (.2) 50-M-M M w/maximum differential 24.7 (.2) 50-M M w/spt threads 24.7 (.2) w/2 SPT switches 26. (.9) 58-M w/manual reset 27. (2.4) w/2 SPST switches 26.0 (.8) 50M w/float block and max. diff (.2) 50M-M M w/manual reset 24.7 (.2) imensions, in. (mm) (49) (6) 6 (52) 4 (7) 5 6 (84) (252) 4 8 (05) 7 6 (87) 52

24 OILR ONTROLS Low Water ut-offs Mechanical or Steam oilers Series 57 Low Water ut-off/pump ontrollers or residential, commercial and industrial low or high pressure boiler applications or boilers of any steaming capacity Monel bellows provides corrosion resistance loat chamber with integral water column provided Mercury for high temperature service Single pole, single throw switch for pump control Single pole, double throw switch for low water cut-off and alarm actuation Optional features Manual reset Integral conductance probes for additional levels and greater operating differential-model 57-RP-M " or 4" equalizing tappings " or 4" tappings for gauge glass/tri-cock installations SPT threads Maximum pressure 50 psi (0.5 kg/cm 2 ) or new electronic 50 Series see page 4 Model 57-M Maximum differential operation Prevents nuisance burner shutdowns in low pressure applications Maximum operating pressure 50 psi (.5 kg/cm 2 ) or additional information see page 56 Series 57 Model 57-RP-M L K L OILR ONTROLS lectrical Ratings ut-off and Pump ircuits Rating (mperes) Voltage ull Load Locked Rotor Pilot uty 20 V V at 240 V or 240 V larm ircuit Rating (mperes) Voltage mps 20 V 240 V /2 Number Number escription lbs. (kg) low water cut-off w/water column 9.7 (8.0) 57-M w/maximum differential 9.7 (8.0) w/alternate tappings 9.5 (7.9) 57--M w/manual reset 9.5 (7.9) 57-M w/manual reset 9.7 (8.0) 57-M-M M w/maximum differential 9.7 (8.0) 57-R w/alternate tappings 42.0 (9.0) 57-R-M R w/manual reset 42.0 (9.0) 57-RP-M w/2 integral conductance probes5.0 (2.) 57-RL w/alternate tappings 42.0 (9.0) 57-RL-M RL w/manual reset 42.0 (9.0) imensions, in. (mm) Model R 57-RL 4 8 (9) (59) 4 5 6(25) 4 8 (9) (59) 4 5 6(25) 8 (9) 2 4 (57) (49) 9 6 (45) (89) (49) Model K L 57 4 (298) 6 (406) (292) (89) 57-4 (298) 6 (406) (292) (89) 57-R 4 (298) 7 (42) (292) (89) 57-RL 4 (298) 7 (42) 2 4 (24) (89) (49) (49) (59) (59) 5

25 OILR ONTROLS Low Water ut-offs Mechanical or Steam oilers Series 50S Low Water ut-off/pump ontrollers or commercial and industrial low or high pressure boiler applications or boilers of any steaming capacity OILR ONTROLS Monel bellows provides corrosion resistance Snap action switches for high temperature service Single pole, single throw switch for pump control Single pole, double throw switch for low water cut-off and alarm actuation Optional features Manual reset 2 Single pole, single throw switches 2 Single pole, double throw switches loat block SPT threads Maximum pressure 50 psi (0.5 kg/cm 2 ) Series 50S with MRURY R Snap-ction Switches UT-O LVL or new electronic 50 Series see page 4 Model 50S-M Maximum differential operation Prevents nuisance burner shutdowns in low pressure applications Maximum operating pressure 50 psi (.5 kg/cm 2 ) UT-O LVL or additional information see page 56 lectrical Ratings Pump ircuit Rating (mperes) Voltage ull Load Locked Rotor Pilot uty 20 V V at 240 V or 240 V larm ircuit Rating (mperes) Voltage mps 20 V 240 V /2 Number Number escription lbs. (kg) 50S 7702 ombination low water cut-off/ 24.7 (.2) pump controller 50S S w/float block 24.7 (.2) 50S--M S- w/manual reset 24.7 (.2) 50S-M S w/float block and max. dif (.2) 50S-M-M S-M w/manual reset 24.7 (.2) 50S S w/spt threads 24.7 (.2) 50S-M S w/maximum differential 24.7 (.2) 50S-M S w/manual reset 24.7 (.2) 50S-M-M S-M w/maximum differential 24.7 (.2) 50S-M S-M w/spt threads 24.7 (.2) 58S S w/2 SPT switches 26. (.9) 58S-M S w/manual reset 27. (2.4) 59S S w/2 SPST switches 26.0 (.8) imensions, in. (mm) (49) (6) 6 (52) 4 (7) 5 6 (84) (252) 4 8 (05) 7 6 (87) 54

26 OILR ONTROLS Low Water ut-offs Mechanical or Steam oilers Series 57S Low Water ut-off/pump ontrollers or residential, commercial and industrial low or high pressure boiler applications or boilers of any steaming capacity Monel bellows provides corrosion resistance loat chamber with integral water column provided `Snap action for high temperature service Single pole, single throw switch for pump control Single pole, double throw switch for low water cut-off and alarm actuation Optional features Manual reset Integral conductance probes for additional levels and greater operating differential-model 57S-RP-M " or 4" equalizing tappings " or 4" tappings for gauge glass/tri-cock installations SPT threads Maximum pressure 50 psi (0.5 kg/cm 2 ) or new electronic 50 Series see page 4 Model 57S-M Maximum differential operation Prevents nuisance burner shutdowns in low pressure applications Maximum operating pressure 50 psi (.5 kg/cm 2 ) or additional information see page 56 Series 57S Model 57S-RP-M L K L OILR ONTROLS lectrical Ratings ut-off and Pump ircuits Rating (mperes) Voltage ull Load Locked Rotor Pilot uty 20 V V at 240 V or 240 V Voltage larm ircuit Rating (mperes) mps 20 V 240 V /2 Number Number escription lbs. (kg) 57S S low water cut-off w/water column 9.7 (8.0) 57S-M S w/maximum differential 9.7 (8.0) 57S S w/alternate tappings 9.5 (7.9) 57S--M S- w/manual reset 9.5 (7.9) 57S-M S w/manual reset 9.7 (8.0) 57S-M-M S-M w/maximum differential 9.7 (8.0) 57S-R S w/alternate tappings 42.0 (9.0) 57S-R-M S-R w/manual reset 42.0 (9.0) 57S-RP-M S w/2 integral conductance probes 5.0 (2.) 57S-RL S w/alternate tappings 42.0 (9.0) 57S-RL-M S-RL w/manual reset 42.0 (9.0) imensions, in. (mm) Model K L 57S 57S- 4 57S-R 57S-RL 4 57S-RP-M 8 (9) (59) (25) 4 (298) 6 (406) (292) (89) (49) 4 8 (9) (59) (25) 4 (298) 6 (406) (292) (89) (49) 8 (9) 2 4 (57) (49) 4 (298) 7 (42) (292) (89) (59) 9 6 (45) (89) (49) 4 (298) 7 (42) 2 4 (24) (89) (59) 9 6 (45) 2 4 (57) (49) 4 (298) 7 (42) (292) (89) N 2 4 (24) 55

27 OILR ONTROLS M Model Setpoints OILR ONTROLS The bellows on the 50 units are sensitive to pressure. t higher pressures the bellows is stiffer requiring more force to move it. t lower pressures the bellows is more pliable (less stiff) requiring less force to move it. onsequently, the on/off points tend to narrow at lower pressures. (Less distance between on and off). arly versions of the 50 mercury bulb units were able to be adjusted. These units had knurled adjustment screws that could be used to raise, lower or widen the setpoints. lthough the available adjustment was small (usually 6" to 8 " total), it was enough to compensate in the field for lower pressure systems. Later versions of the 50 mercury bulb units and all snap switch units are not adjustable in the field. The M models were created to provide a 50 control with factory settings to compensate for the narrowing of setpoints on new and existing installations. On M models the distance between pump off and burner off is increased by approximately 7 6 ". Note that the pump on/off differential on both standard and M models is set at 4". This larger differential is accomplished by lowering the burner off setpoint 8 " below the casting line on M models when setting the burner on/off points at 50 psi. This compensates for the narrowing of the setpoints at lower operating pressures because the burner off point will move upward (closer to the casting line) at lower pressures. Operating Levels Series 50/57 & Series 50S/57S Standard Models /4" ifferential "M" Models PUMP O PUMP O /8" ifferential urner Off Switch setpoints at 50psi urner Off /6" ifferential 56

28 OILR ONTROLS low own Piping SRIS 50/50S, 50 N SRIS 9/94 ONTROLS Larger LWO/Pump controller units are installed on equalizing lines. The piping must be full size and include cross connections where pipes change direction. ach control should include its own blow down piping and valves. Recommended ual Valve low-own Piping These controls should be blown down daily when installed on commercial/industrial boilers and weekly in residential applications. Regular blow down keeps the control free of sediment and ensures it operates properly. When blowing down a control at pressure, the blow down valve should be opened slowly. The piping needs to be warmed up and stagnant water in the drain piping needs to be pushed out. Suddenly opening a blow down valve causes steam to condense, which creates water hammer. rushed floats and damaged linkages can occur when water hammer occurs due to improper blow down piping. onnecting lines to boiler should be straight runs Positive Shutoff Valve (all Valve) Slow Opening Valve "Throttling Valve" (ate Valve) OILR ONTROLS or these reasons, Mconnell & Miller recommends a dual valve blow-down system for each control. Proper low-down Procedure: (Using dual valve system). With water in the boiler at its normal level, open Positive Shut-off all Valve. 2. Open Throttling ate Valve slowly until drain piping heats up and then open fully. Observe that the water level starts falling in the gauge glass.. lose Throttling ate Valve after verifying that the pump contacts have closed and the burner contacts have opened thus shutting down the boiler. Note: If this does not happen, immediately close all valves, turn off burner and correct the problem. 4. lose Positive Shut-off all Valve. 5. Observe that the water level returns to its normal level before leaving site. Piping must be pitched to drain with no restrictions or reduction in pipe size 57

29 OILR ONTROLS Low Water ut-offs Mechanical ombination Low Water ut-off/pump ontrollers for Steam oilers Series 9 Low Water ut-off/pump ontrollers or commercial and industrial low or high pressure steam boilers Maintains consistent water level regardless of pressure OILR ONTROLS or boilers of any steaming capacity No. 5 Switch included Magnetic repulsion eliminates need for bellows Optional features Manual reset On/Off or proportional control switch to maintain constant boiler water level SPT threads " connections SRIS 9 UT-O LVL 50 Maximum pressure 50 psi (0.5 kg/cm 2 ) lectrical Ratings 45 V at 20 or 240 V imensions, in. (mm) (256) (47) 4 5 (.5) 5 9 (42) (225) (27) Number Number escription lbs. (kg) ombination low water cut-off/ 5.0 (5.9) pump controller w/no. 5 switch w/spt threads 5.0 (5.9) w/spt threads & No. 7- switch 5.5 (6.0) 9-M w/manual reset 5.0 (5.9) 9-M M w/spt threads 5.0 (5.9) w/no. 7 switch 5.5 (6.0) 9-7-M W/manual reset 5.5 (6.0) 58

30 OILR ONTROLS Low Water ut-offs Mechanical ombination Low Water ut-off/pump ontrollers for Steam oilers Series 9 Low Water ut-off/pump ontrollers or commercial and industrial low or high pressure steam boilers Maintains consistent water level regardless of pressure Water column with integral tappings for gauge glass and tri-cock installations or boilers of any steaming capacity No. 5 Switch included Magnetic repulsion eliminates need for bellows Optional features Manual reset On/Off or proportional control switch to maintain constant boiler output " connections Maximum pressure 50 psi (0.5 kg/cm 2 ) lectrical Ratings 45 V at 20 or 240 V imensions, in. (mm) SRIS 9 Model K M L Q R UT-O LVL 50 K N P V U T W X S UT-O LVL Number Number escription lbs. (kg) ombination low water cut-off/ 52.5 (2.8) pump controller w/no. 5 switch w/alternate tappings 52.5 (2.8) w/no. 7 switch 52.5 (2.8) 9--7M w/manual reset 52.5 (2.8) 9--M w/manual reset 52.5 (2.8) w/alternate tappings 52.5 (2.8) 9--M w/manual reset 52.5 (2.8) w/no. 7 switch 52.5 (2.8) w/alternate tappings 52.5 (2.8) w/no. 7 switch 52.5 (2.8) 9-M w/manual reset 52.5 (2.8) w/no. 7 switch 52.5 (2.8) 9-7M w/manual reset 52.5 (2.8) 9--M w/manual reset 52.5 (2.8) w/alternate tappings 52.5 (2.8) OILR ONTROLS Model L M N P Q R (24) 0 6 (274) (0) (7) 9- (292) 0 6 (274) (0) 2 4 (57) (24) 0 6 (274) (0) (7) 9- (292) 0 6 (274) (0) 2 4 (57) 9- (292) 0 6 (274) (0) 2 4 (57) Model S T U V W X (7.4) 7 (445) 20 (52) (89) (89) 6 (52) (7.4) 7 (445) 20 (52) (89) (89) 6 (52) (7.4) 7 (445) 20 (52) (89) (89) 6 (52) (7.4) 7 (445) 20 (52) (89) (89) 6 (52) (7.4) 7 (445) 20 (52) (89) (89) 6 (52) 59

31 OILR ONTROLS Low Water ut-offs Mechanical ombination Low Water ut-off/pump ontrollers for Steam oilers Series 94 Low Water ut-off/pump ontrollers or commercial and industrial low or high pressure steam boilers Maintains consistent water level regardless of pressure or boilers of any steaming capacity No. 5 Switch included K L OILR ONTROLS Magnetic repulsion eliminates need for bellows Optional features Manual reset On/Off or proportional control switch to maintain constant boiler water level SPT threads 4" connections Maximum pressure 250 psi (7.6 kg/cm 2 ) SRIS 94 M 250 N K lectrical Ratings 45 V at 20 or 240 V Number Number escription lbs. (kg) ombination low water cut-off/ 52.5 (2.8) pump controller w/no. 5 switch w/alternate tappings 50. (22.8) 94-M w/manual reset 50. (22.8) M w/no. 7 switch 52.5 (2.8) w/spt threads 52.5 (2.8) w/spt threads 52.0 (2.6) 94-M w/manual reset 52.5 (2.8) w/no. 7 switch 52.0 (2.6) M N UT-O LVL N imensions, in. (mm) Model 94 6 (52) 7 (78) (268) 8 6 (478) 94-6 (52) 7 (78) (268) 8 6 (478) Model (49) 4 6 (9) 8 4 (222) (28.6) (49) 4 6 (9) 8 4 (222) (28.6) Model K L M N 94 (5) (5) (52) 4 (2) 60

32 OILR ONTROLS Low Water ut-offs Mechanical ombination Low Water ut-off/pump ontrollers for Steam oilers Series 94 Low Water ut-off/pump ontrollers or commercial, and industrial low or high pressure steam boilers Maintains consistent water level regardless of pressure or boilers of any steaming capacity Water column with integral tappings for gauge glass and tri-cock installations No. 5 Switch included Magnetic repulsion eliminates need for bellows Optional features Manual reset No. 7- On/Off or proportional control switch to maintain constant boiler water level 4" connections Maximum pressure 250 psi (7.6 kg/cm 2 ) lectrical Ratings 45 V at 20 or 240 V imensions, in. (mm) Model K SRIS 94 4 R M Q S 4 K UT-O LVL 250 Y N P U V L W T X N 4 4 UT-O LVL Number Number escription lbs. (kg) ombination low water cut-off/ 72.0 (2.7) pump controller w/series 5 switch w/alternate tappings 72.0 (2.7) w/series 7 switch 72.0 (2.7) 94-M w/manual reset 72.0 (2.7) w/series 7 switch 72.0 (2.7) 94-7M w/manual reset 72.0 (2.7) w/alternate tappings 72.0 (2.7 OILR ONTROLS Model L M N P Q R S (295) 6 4 (7.4) 6 (2) 2 6 (7) 4 (2) 2 8 (60) (27) 6 4 (7.4) 6 (2) 2 6 (7) 4 (2) 2 8 (60) (27) 6 4 (7.4) 6 (2) 2 6 (7) 4 (2) 2 8 (60) Model T U V W X Y (48) 20 (52) (76) (76) 6 (52) 0 6 (274) (48) 20 (52) (76) (76) 6 (52) 0 6 (274) (48) 20 (52) (76) (76) 6 (52) 0 6 (274) 6

33 OILR ONTROLS Water eeders lectric Series W Uni-Match lectric Water eeders or low pressure steam boilers with cold water feed Three position slide switch allows the timing cycle to be matched to that of the major low water cut-off manufacturers OILR ONTROLS ield adaptable feed rate, 2, or 4 gpm (.8, 7.6, or 5. lpm) lectronic operation provides consistent, accurate cycleto-cycle repeatability Universal design simplifies selection and reduces stock an be used with mechanical or electronic low water cut-off controls Manual feed button Uni-Match Includes 8 thread x " (mm) tubing adapters for quick installation with " (mm) copper tubing K asy to clean strainer Maximum water pressure 50 psi (0.5 kg/cm 2 ) Maximum boiler pressure 5 psi ( kg/cm 2 ) Maximum water temperature 20 (49 ) Maximum ambient temperature 00 (8 ) Maximum power consumption (during water feed only) 5 V at 24 V 20 V at 20 V (50 or 60 z) imensions, in. (mm) K (7) 6 4 (59) (24) 4 4 (08) 8 7 (9) 6 (78) 8 (26) 5 6 (48) Number Number escription lbs. (kg) W-2-U lectric Water eeder, 24V 2.8 (.) W-2-U lectric Water eeder, 20V 2.8 (.) 62

34 OILR ONTROLS Water eeders lectric Series 0- lectric Water eeders or low pressure steam boilers with cold water feed liminates necessity to manually add water to the boiler an be used with mechanical or electronic low water cut-off controls Quick-change replaceable cartridge valve and strainer Manual feed button Model 0- features a 20 V solenoid Model features a 24 V solenoid and a separate 50V transformer Maximum water supply pressure 50 psi (0.5 kg/cm 2 ) Maximum boiler pressure 25 psi (.8 kg/cm 2 ) Series 0- OILR ONTROLS Maximum inlet water temperature 20 (49 ) Maximum power consumption 40 V at 24 V 40 V at 20 V low ata Pressure ifferential low Rate psi (kg/cm 2 ) gpm (lpm) 5 (.4).4 (5.) 0 (.7).7 (6.4) 20 (.4) 2. (7.9) 40 (2.8) 2.9 (.0) 60 (4.2).4 (2.9) 80 (5.6) 4.0 (5.) imensions, in. (mm) 4 6 (0) (75) 5 8 (0) (92) 5 6 (76) Number Number escription lbs. (kg) lectric water feeder, 20V 2.8 (.) 0-24V lectric water feeder, 24V 2.8 (.) 6

35 OILR ONTROLS Water eeders Mechanical Series 47/47-2 Mechanical Water eeders/low Water ut-offs LOSIN LVL or steam and hot water boilers with cold water feed ontinuous maintenance of minimum safe water level, independent of electrical service Proportional feed action Quick hook-up fittings provided Series 47 OILR ONTROLS Quick-change replaceable cartridge valve and strainer Optional features No. 2 switch Manual reset Model 47 can be field upgraded with a No. 2 switch to add low water cut-off function Maximum water supply pressure 50 psi (0.5 kg/cm 2 ) LOSIN LVL Maximum inlet water temperature 20 (49 ) Maximum boiler pressure 25 psi (.8 kg/cm 2 ) Series 47-2 N K K P L M lectrical Ratings Motor Switch Rating (mperes) Voltage ull Load Locked Rotor Pilot uty 20 V V at 20 or 240 V 240 V z imensions, in. (mm) 7 8 (02) 5 4 () 7 8 (87) min (67) (0) (270) 4 (56) max. 64 TOP VIW K L M N P (86) (7) 29 (58.4) (5.7) (76) (5)

36 OILR ONTROLS Water eeders Mechanical Series 47 (continued) Mechanical Water eeders apacities gpm (kg/hr.) lbs./hr. STM Sq. t. OILR OILR tu hp (K-alories/r.) (Kilowatts) (84) (6) (907) (454) 4,000,000 2,000,000 Maximum apacity apacity at Switch ut-off 6,000 2,000 8,000 4,000 4,000,000 (5,900),000,000 (,900) 2,000,000 (7,900),000,000 (4,000) 6 (7) 87 (85) 58 (569) 29 (284) OILR ONTROLS 0 (0) 0 psi (kg/cm 2 ) (0) (.7) (.4) (2.) (2.8) (.5) (4.2) (4.9) (5.6) (6.) (7.0) IRNTIL PRSSUR IN POUNS PR SQ. IN. (Water pressure less boiler pressure) Number Number escription lbs. (kg) Mechanical water feeder 27.5 (2.5) w/no. 2 switch 28.5 (.0) 47-2-M w/manual reset 28.5 (.0) 47-X w/o quick hook-up fittings 25.0 (.4) 47-2X w/o quick hook-up fittings 26.0 (.8) 65

37 OILR ONTROLS Water eeders Mechanical Series 247/247-2 Mechanical Water eeders/low Water ut-offs or steam and hot water boilers with cold water feed ontinuous maintenance of minimum safe water level, independent of electrical service Proportional feed action Quick-change replaceable cartridge valve and strainer Quiet, durable operation OILR ONTROLS Isolated feed valve minimizes lime and scale build-up Optional features No. 2 switch Manual reset Model 247 can be field upgraded with a No. 2 switch to add low water cut-off function Maximum water supply pressure 50 psi (0.5 kg/cm 2 ) Series 247 Maximum inlet water temperature 20 (49 ) Maximum vessel pressure 0 psi (2. kg/cm 2 ) Series LOSIN LVL lectrical Ratings Motor Switch Rating (mperes) Voltage ull Load Locked Rotor Pilot uty 20 V V at 20 or 240 V 240 V z K imensions, in. (mm) K 6 (65) 9 8 (22) 5 8 (0) (7) (67) (86) (5.7) 29 (48.4) 66

38 OILR ONTROLS Water eeders Mechanical Series 247 (continued) Mechanical Water eeders apacities gpm (kg/hr.) lbs./hr. STM Sq. t. OILR OILR tu hp (K-alories/r.) (Kilowatts) 8 (84) 4,000 6,000 4,000,000 (5,900) 6 (7) (6) (907) (454),000 2,000,000 Maximum apacity apacity at Switch ut-off 2,000 8,000 4,000,000,000 (,900) 2,000,000 (7,900),000,000 (4,000) 87 (85) 58 (569) 29 (284) OILR ONTROLS 0 (0) 0 psi (kg/cm 2 ) (0) (.7) (.4) (2.) (2.8) (.5) (4.2) (4.9) (5.6) (6.) (7.0) IRNTIL PRSSUR IN POUNS PR SQ. IN. (Water pressure less boiler pressure) Number Number escription lbs. (kg) Mechanical water feeder 22.0 (0.0) w/no. 2 switch 22.5 (0.2) M w/manual reset 22.5 (0.2) 67

39 OILR ONTROLS Water eeders Mechanical Series 5/5-2 Mechanical Water eeders/low Water ut-offs or low pressure steam and hot water boilers larger than 5,000 sq. ft. (465m 2 ) capacity with cold water feed Quick-change replaceable cartridge valve and strainer OILR ONTROLS Optional features No. 2 switch Manual reset loat block Proportional feed action Model 5 can be field upgraded with a No. 2 switch to add low water cut-off function Maximum water supply pressure 50 psi (0.5 kg/cm 2 ) Maximum inlet water temperature 20 (49 ) Maximum vessel pressure 5 psi (2.5 kg/cm 2 ) Series 5 LOSIN LVL lectrical Ratings Motor Switch Rating (mperes) Voltage ull Load Locked Rotor Pilot uty 20 V V at 20 or 240 V 240 V z LOSIN LVL imensions, in. (mm) Series (20) 0 8 (264) 5 4 (46) 4 Number Number escription lbs. (kg) Mechanical water feeder 5. (6.0) w/float block 8.5 (7.5) w/series 2 switch 8. (7.4) 5--2-M w/manual reset 8. (7.4) w/series 2 switch 5.8 (6.2) 5-2-M w/manual reset 5.7 (6.2) apacities R ISR gpm (kg/hr.) lbs./hr. 20 (456) 0, (4082) (629) (75) (2722) (2268) (84) (6) (907) (454) 9,000 8,000 7,000 6,000 5,000 4,000,000 2,000,000 Maximum apacity apacity at Switch ut-off IRNTIL PRSSUR IN POUNS PR SQ. IN. (Water pressure less boiler pressure) STM Sq.t. 40,000 6,000 2,000 28,000 24,000 20,000 6,000 2,000 8,000 4,000 (0) 0 0 psi (kg/cm 2 ) (0) (.7) (.4) (2.) (2.8) (.5) (4.2) (4.9) (5.6) (6.) (7.0) OILR hp (Kilowatts) 290 (284) 26 (2559) 22 (2274) 20 (990) 74 (706) 45 (42) 6 (7) 87 (85) 58 (569) 29 (284) 0 68

40 OILR ONTROLS Water eeders Mechanical Series 5-S/5-S-2 Mechanical Water eeders/low Water ut-offs or high capacity [up to 5,000 sq. ft. (250m 2 )] low pressure steam and hot water boilers with cold water feed Optional features No. 2 switch Manual reset loat block Proportional feed action Maximum water supply pressure 00 psi (7 kg/cm 2 ) Maximum inlet water temperature 20 (49 ) Maximum vessel pressure 5 psi (2.5 kg/cm 2 ) lectrical Ratings Motor Switch Rating (mperes) Voltage ull Load Locked Rotor Pilot uty 20 V V at 20 or 240 V 240 V z Series 5-S LOSIN LVL LOSIN LVL OILR ONTROLS imensions, in. (mm) Series 5-S (20) 0 8 (264) 5 4 (46) 4 Number Number escription lbs. (kg) 5-S 5600 Mechanical water feeder 6.5 (6.6) 5-S S w/no. 2 switch 7. (6.9) 5-S-2-M S-2 w/manual reset 7. (6.9) 5-S S w/float block 4.8 (9.0) 5-S S w/no. 2 switch 4.8 (9.0) 5-S-2-M S-2 w/manual reset 4.7 (9.8) apacities R ISR gpm (kg/hr.) lbs./hr. 20 (456) 0, (4082) (629) (75) (2722) (2268) (84) (6) (907) (454) 9,000 8,000 7,000 6,000 5,000 4,000,000 2,000,000 Maximum apacity apacity at Switch ut-off IRNTIL PRSSUR IN POUNS PR SQ. IN. (Water pressure less boiler pressure) STM Sq.t. 40,000 6,000 2,000 28,000 24,000 20,000 6,000 2,000 8,000 4,000 (0) 0 0 psi (kg/cm 2 ) (0) (.7) (.4) (2.) (2.8) (.5) (4.2) (4.9) (5.6) (6.) (7.0) OILR hp (Kilowatts) 290 (284) 26 (2559) 22 (2274) 20 (990) 74 (706) 45 (42) 6 (7) 87 (85) 58 (569) 29 (284) 0 69

41 OILR ONTROLS Water eeders Mechanical Series 5/5-2 Mechanical Water eeders/low Water ut-offs or low pressure steam and hot water boilers larger than 5,000 sq. ft. (465m 2 ) with hot or cold water feed Optional features No. 2 switch Manual reset loat block LOSIN LVL OILR ONTROLS Proportional feed action Model 5 can be field upgraded with a No. 2 switch to add low water cut-off function Maximum water supply pressure 50 psi (0.5 kg/cm 2 ) Maximum inlet water temperature 20 (49 ) Maximum vessel pressure 75 psi (5. kg/cm 2 ) Series 5 lectrical Ratings Motor Switch Rating (mperes) Voltage ull Load Locked Rotor Pilot uty 20 V V at 20 or 240 V 240 V z LOSIN LVL imensions, in. (mm) Series (206) 0 8 (264) 5 4 (46) 4 Number Number escription lbs. (kg) Mechanical water feeder 8.0 (7.2) w/float block 42.0 (9.0) w/no. 2 switch 42.0 (9.0) 5--2-M w/no. 2 switch & manual reset 42.0 (9.0) w/no. 2 switch 8.5 (7.5) 5-2-M w/manual reset 8.5 (7.5) apacities R ISR gpm (kg/hr.) lbs./hr. 20 (456) 0, (4082) (629) (75) (2722) (2268) (84) (6) (907) (454) 9,000 8,000 7,000 6,000 5,000 4,000,000 2,000,000 Maximum apacity apacity at Switch ut-off IRNTIL PRSSUR IN POUNS PR SQ. IN. (Water pressure less boiler pressure) STM Sq.t. 40,000 6,000 2,000 28,000 24,000 20,000 6,000 2,000 8,000 4,000 (0) 0 0 psi (kg/cm 2 ) (0) (.7) (.4) (2.) (2.8) (.5) (4.2) (4.9) (5.6) (6.) (7.0) OILR hp (Kilowatts) 290 (284) 26 (2559) 22 (2274) 20 (990) 74 (706) 45 (42) 6 (7) 87 (85) 58 (569) 29 (284) 0 70

42 OILR ONTROLS Make-Up Water eeders In boiler feed systems with higher pressures, a make-up feeder is usually provided on the condensate receiver. It adds water to the receiver when necessary so there is always an adequate supply for boiler demand. ITT Mconnell & Miller Make-up feeders provide large feeding capacity. Unless otherwise stated, valves and seats are of stainless steel and protected by a large integral strainer. Positive alignment of the valve is assured by cam & roller, straight thrust action. These feeders can be used for many other liquid control applications such as: Pharmaceutical Laboratory Industrial istillation equipment Receiver tanks vaporative coolers umidifiers quariums Steam baths Wet and dry hygrometers OILR ONTROLS Water eeding apacity lbs./hr. (kg/hr.) Model ity Water Supply Pressure with /4" Pipe and No Tank Pressure, 0 psi (kg/cm 2 ) Number 0 (.7) 20 (.4) 0 (2.) 40 (2.8) 50 (.5) 60 (4.) 70 (4.8) 80 (5.5) 90 (6.2) (406) 4500 (204) 5600 (2540) 6550 (297) 7400 (57) 850 (697) 8800 (992) 9400 (4264) 0200 (4627) 2 & (860) 6000 (2722) 7500 (402) 8600 (90) 9600 (455) 0500 (476) 00 (526) 2000 (544) 200 (5988) (454) 500 (680) 800 (86) 200 (95) 2400 (089) 2600 (79) 2800 (270) 000 (6) 00 (497) (907) 000 (6) 700 (678) 400 (850) 4800 (277) 85-S 000 (6) 4000 (84) 5000 (2268) 6200 (282) 55-S 2500 (4) 600 (6) 4500 (204) 5200 (259) 5800 (26) 6500 (2948) 7000 (75) 7600 (447) 8800 (992) 7

43 OILR ONTROLS Water eeders Make-Up Series 25- Make-Up Water eeder OILR ONTROLS or boiler receiver tanks loat operated Proportional feed action Soft seat provides positive seal Seal between float chamber and valve chamber is not a positive seal Maximum water supply pressure 00 psi (7 kg/cm 2 ) Maximum inlet water temperature 20 (49 ) Maximum vessel pressure 5 psi (2.5 kg/cm 2 ) Series 25- imensions, in. (mm) 6 (2) () 8 8 (206) (2.7) 0 8 (264) 4 Number Number escription lbs. (kg) Make-up water feeder 7.5 (7) w/float block 4.8 (9) apacities R ISR (kg/hr.) lbs./hr. (4990),000 gpm (lpm) OILR hp (Kilowatts) 22 (8.27) 9 (27) (456) 0, (75.70) 290 (284) (4082) 9,000 8 (68.) 26 (2559) (629) (75) (2722) 8,000 7,000 6,000 Maximum apacity 6 (60.56) 4 (52.99) 2 (45.42) 22 (2274) 20 (990) 74 (706) (2268) 5,000 0 (7.85) 45 (42) (84) 4,000 8 (0.28) 6 (7) (6),000 6 (22.7) 87 (85) (907) 2,000 4 (5.4) 58 (569) (454),000 2 (7.57) 29 (284) (0) 0 0 psi (kg/cm 2 ) (0) (.7) (.4) (2.) (2.8) (.5) (4.2) (4.9) (5.6) (6.) (7.0) (0) 0 (0) WTR SUPPLY PRSSUR IN LS. PR SQ. IN. 72

44 OILR ONTROLS Water eeders Make-Up Series 2 Make-Up Water eeder or boiler receiver tanks irect mounting eliminates need for equalizing connections Proportional feed action Mounting lange six 7 6" (.mm) bolt holes on a 5 4" (46mm) bolt circle Soft seat provides positive seal Maximum water supply pressure 50 psi (0.5 kg/cm 2 ) Maximum inlet water temperature 20 (49 ) Maximum vessel pressure 5 psi (2.5 kg/cm 2 ) imensions, in. (mm) Series 2 8 (26) 5 6 (84) (4) 8 6 (224) 4 4 (2) 6 4 (59) (70) OILR ONTROLS Series 22 Make-Up Water eeder or boiler receiver tanks irect mounting eliminates need for equalizing connections Proportional feed action Mounting lange six 7 " (.5mm) bolt holes on a 8 " (26mm) bolt circle Soft seat provides positive seal Maximum water supply pressure 50 psi (0.5 kg/cm 2 ) Maximum inlet water temperature 20 (49 ) Maximum vessel pressure 5 psi (2.5 kg/cm 2 ) Series 22 imensions, in. (mm) 8 (26) 4 6 (84) (4) 8 6 (224) 4 4 (2) 6 4 (59) 4 (20) 9 (24) apacities (kg/hr.) lbs./hr. PITY URV 6, , ,000 28, ,000 24, , , , , , , ,000 8, ,000 4, psi (kg/cm 2 ) (0) (0.7)(.4)(2.)(2.8)(.5)(4.2)(4.9)(5.6)(6.)(7.0)(7.7)(8.4)(9.)(9.8)(0.5) (7258) (6804) (650) (5897) (544) (4990) (456) (4082) (629) (75) (2722) (2268) (84) (6) (907) (454) (0) WTR SUPPLY PRSSUR IN LS. PR SQ. IN. gpm (lpm) (2.2) (.55) (05.98) (98.4) (90.84) (8.27) (75.70) (68.) (60.56) (52.99) (45.42) (7.85) (0.28) (22.7) (5.4) (7.57) (0) OILR hp (Kilowatts) 464 (4549) 45 (4264) 406 (980) 77 (696) 48 (4) 9 (27) 290 (284) 26 (2559) 22 (2274) 20 (990) 74 (706) 45 (42) 6 (7) 87 (85) 58 (569) 29 (284) 0 (0) Number Number escription lbs. (kg) Make-up water feeder 5. (6.9) Make-up water feeder 2. (9.7) 7

45 OILR ONTROLS Water eeders Make-Up Series 847 Make-Up Water eeder or receiver tanks in commercial or industrial applications Mounts directly on the receiver, eliminating need for equalizing connections Quick-change replaceable cartridge valve and strainer WTR LIN OILR ONTROLS Proportional feed action Mounting lange six 7 6" (.mm) bolt holes on a 5 4" (46mm) bolt circle Optional features No. 2 switch lternate valve orientation Maximum supply pressure 50 psi (0.5 kg/cm 2 ) Maximum inlet water temperature 20 (49 ) Series 847 Maximum receiver pressure 25 psi (.8 kg/cm 2 ) imensions, in. (mm) (86) (25) (7) 9 6 (90) 7 6 (87) Number Number escription lbs. (kg) Make-up water feeder (5.0) w/alternate valve orientation 2 (5.4) w/no. 2 switch 2 (5.4) apacities gpm (kg/hr.) lbs./hr. STM Sq. t. OILR tu/r. (K-alories/r.) OILR hp (Kilowatts) 8 (84) 4,000 6,000 4,000,000 (5,800) 6 (7) (6) (907) (454),000 2,000,000 Maximum apacity apacity at Switch ut-off 2,000 8,000 4,000,000,000 (,900) 2,000,000 (7,900),000,000 (4,000) 87 (85) 58 (569) 29 (284) 0 (0) 0 psi (kg/cm 2 ) (0) (.7) (.4) (2.) (2.8) (.5) (4.2) (4.9) (5.6) (6.) (7.0) IRNTIL PRSSUR IN POUNS PR SQ. IN. (Water pressure less boiler pressure) 74

46 OILR ONTROLS Water eeders Make-Up Series 85 Make-Up Water eeder or receiver tanks in commercial or industrial applications Mounts directly on the receiver, eliminating need for equalizing connections Quick-change replaceable cartridge valve and strainer Proportional feed action Mounting lange six 7 6" (.mm) bolt holes on a 5 4" (46mm) bolt circle Maximum water supply pressure 50 psi (0.5 kg/cm 2 ) Maximum inlet water temperature 20 (49 ) Maximum receiver pressure 5 psi (2.5 kg/cm 2 ) Series 85 imensions, in. (mm) WTR LIN 4 (298) (25) (7) 9 6 (90) (87) OILR ONTROLS Model 85-S Make-Up Water eeder xtended float and rod assembly Wider operating range Maximum water supply pressure 00 psi (7 kg/cm 2 ) Maximum inlet water temperature 20 (49 ) Maximum receiver pressure 5 psi (2.5 kg/cm 2 ) WTR LIN Number Number escription lbs. (kg) Make-up water feeder 4 (6.4) 85-S w/extended float & rod assy. 6 (7.) apacities Model 85 Model 85-S imensions, in. (mm) 4 (298) (25) 6 (8) 9 6 (90) (87) apacities Model 85-S R ISR gpm (kg/hr.) lbs./hr. 20 (456) 0, (4082) (629) (75) (2722) (2268) (84) (6) (907) (454) 9,000 8,000 7,000 6,000 5,000 4,000,000 2,000,000 Maximum apacity apacity at Switch ut-off IRNTIL PRSSUR IN POUNS PR SQ. IN. (Water pressure less boiler pressure) STM Sq.t. 40,000 6,000 2,000 28,000 24,000 20,000 6,000 2,000 8,000 4,000 (0) 0 0 psi (kg/cm 2 ) (0) (.7) (.4) (2.) (2.8) (.5) (4.2) (4.9) (5.6) (6.) (7.0) OILR hp (Kilowatts) 290 (284) 26 (2559) 22 (2274) 20 (990) 74 (706) 45 (42) 6 (7) 87 (85) 58 (569) 29 (284) 0 R ISR gpm (kg/hr.) lbs./hr. 20 (456) 0, (4082) (629) (75) (2722) (2268) (84) (6) (907) (454) 9,000 8,000 7,000 6,000 5,000 4,000,000 2,000,000 Maximum apacity apacity at Switch ut-off IRNTIL PRSSUR IN POUNS PR SQ. IN. (Water pressure less boiler pressure) STM Sq.t. 40,000 6,000 2,000 28,000 24,000 20,000 6,000 2,000 8,000 4,000 (0) 0 0 psi (kg/cm 2 ) (0) (.7) (.4) (2.) (2.8) (.5) (4.2) (4.9) (5.6) (6.) (7.0) OILR hp (Kilowatts) 290 (284) 26 (2559) 22 (2274) 20 (990) 74 (706) 45 (42) 6 (7) 87 (85) 58 (569) 29 (284) 0 75

47 OILR ONTROLS Water eeders Make-Up Series 55-S Make-Up Water eeder OILR ONTROLS or applications where water is added to steam separators, receivers, tanks, or other vessels Proportional feed action Quick-change replaceable cartridge valve and strainer Optional features loat lock Maximum water supply pressure 75 psi (5. kg/cm 2 ) Maximum inlet water temperature 20 (49 ) Maximum vessel pressure 25 psi (.8 kg/cm 2 ) imensions, in. (mm) (7) 8 (.2) 2 4 () 4 8 (05) 0 8 (264) 6 6 (70) 4 55-S LOSIN LVL Number Number escription lbs. (kg) 55-S 6400 Make-up water feeder 5.8 (6.2) 55-S S w/float block 5.8 (6.2) apacities (kg/hr.) lbs./hr. (75) 7,000 R ISR gpm (lpm) 4 OILR hp (Kilowatts) (52.99) 20 (990) (2722) 6,000 2 (45.42) 74 (706) (2268) (84) 5,000 4,000 Maximum apacity 0 (7.85) 8 (0.28) 45 (42) 6 (7) (6),000 6 (22.7) 87 (85) (907) 2,000 4 (5.4) 58 (569) (454),000 2 (7.57) 29 (284) (0) 0 psi (kg/cm 2 ) (0) (.7) (.4) (2.) (2.8) (.5) (4.2) (4.9) 0 (0) 0 (0) WTR SUPPLY PRSSUR IN LS. PR SQ. IN. (vailable city water supply pressure, or pump pressure, less internal pressure of unit on which control is installed) 76

48 OILR ONTROLS Valves Series 4- all Type low own Valve or Mconnell & Miller Series 47, 67 and 70 boiler control blow down valve replacement ull-ported ball action valve Teflon seats provide bind free, leak tight ball movement asy open handle keeps hands away from hot water and steam asket and mounting screws included Maximum pressure 0 psi (.8 kg/cm 2 ) See page 52 for blow-down information Series 4- OILR ONTROLS imensions, in. (mm) 6 4 (7.4) 4 (02) 2 4 (57) (60) 2 (64) 5 4 (46) 90 Number Number escription lbs. (kg) low down valve (.5) 77

49 OILR ONTROLS Valves Series 250 Pressure Relief Valves or tanks and hydronic heating systems OILR ONTROLS Protects against over-pressure Minimizes hammering with flash steam Low differential pressure psi (.2 kg/cm 2 ) between opening and closing Meets SM Pressure Vessel and oiler ode, Section IV Sizes and material 4" - " bronze body and seat 2" cast iron body, brass seat PM rubber diaphragm and seat disc Maximum temperature 250 (2 ) Series 250 /4" - " (20-25mm) INLT OPN POSITION RIN Maximum operating pressure range 0-25 psig ( kg/cm 2 ) NM PLT OILR ISR VUUM RKR Series 250 2" (50mm) imensions, in. (mm) Size (65) (8) 4 (20) (6) (26) 2 (5.2) (7) 4 (45) 7 8 (22) (25) (26) 2 4 (57) 2 6 (52) (7) 4 (8) (279) 78

50 OILR ONTROLS Series 250 Pressure Relief Valves Performance Model Opening Pressure SM Rating Number psig (kg/cm 2 ) TU (K-alories) 250-/4IN-5 5 () 55,000 (2,04) 250-/4IN-0 0 (2.) 790,000 (,4) 250-/4IN-6 6 (2.5) 900,000 (,57) 250-/4IN (2.8) 97,000 (,86) 250-/4IN (.2),065,000 (4,226) 250-/4IN (.5),60,000 (4,60) 250-/4IN (4.2),252,000 (4,968) 250-/4IN (5.),65,000 (6,409) 250-/4IN (7) 2,075,000 (8,24) 250-/4IN (8.8) 2,55,000 (,059) 250-IN-5 5 () 770,000 (,056) 250-IN-0 0 (2.),70,000 (4,642) 250-IN-6 6 (2.5),0,000 (5,278) 250-IN (2.8),47,000 (5,702) 250-IN (.2),575,000 (6,250) 250-IN (.5),70, 000 (6,786) 250-IN (4.6) 2,0,000 (8,7) 250-IN (5.) 2,85,000 (9,464) 250-IN (7),060,000 (2,42) 250-IN (8.8),75,000 (4,82) 250-2IN-0 0 (2.) 4,00,000 (6,270) 250-2IN-6 6 (2.5) 4,600,000 (8,254) 250-2IN (2.8) 5,000,000 (9,84) 250-2IN (.2) 5,500,000 (2,825) 250-2IN (.5) 5,900,000 (2,42) Number Number escription lbs. (kg) 250-/4IN Relief Valve 4, 5 psi ( kg/cm 2 ). (.6) 250-/4IN Relief Valve 4, 0 psi (2. kg/cm 2 ). (.6) 250-/4IN Relief Valve 4, 6 psi (2.5 kg/cm 2 ). (.6) 250-/4IN Relief Valve 4, 40 psi (2.8 kg/cm 2 ). (.6) 250-/4IN Relief Valve 4, 45 psi (.2 kg/cm 2 ). (.6) 250-/4IN Relief Valve 4, 50 psi (.5 kg/cm 2 ). (.6) 250-/4IN Relief Valve 4, 60 psi (4.2 kg/cm 2 ). (.6) 250-/4IN Relief Valve 4, 75 psi (5. kg/cm 2 ). (.6) 250-/4IN Relief Valve 4, 00 psi (7 kg/cm 2 ). (.6) 250-/4IN Relief Valve 4, 25 psi (8.8 kg/cm 2 ). (.6) 250-IN Relief Valve, 5 psi ( kg/cm 2 ).5 (.7) 250-IN Relief Valve, 0 psi (2. kg/cm 2 ).5 (.7) 250-IN Relief Valve, 6 psi (2.5 kg/cm 2 ).5 (.7) 250-IN Relief Valve, 40 psi (2.8 kg/cm 2 ).5 (.7) 250-IN Relief Valve, 45 psi (.2 kg/cm 2 ).5 (.7) 250-IN Relief Valve, 50 psi (.5 kg/cm 2 ).5 (.7) 250-IN Relief Valve, 65 psi (4.6 kg/cm 2 ).5 (.7) 250-IN Relief Valve, 75 psi (5. kg/cm 2 ).5 (.7) 250-IN Relief Valve, 00 psi (7 kg/cm 2 ).5 (.7) 250-IN Relief Valve, 25 psi (8.8 kg/cm 2 ).5 (.7) 250-2IN Relief Valve 2, 0 psi (2. kg/cm 2 ) 7. (7.8) 250-2IN Relief Valve 2, 6 psi (2.5 kg/cm 2 ) 7. (7.8) 250-2IN Relief Valve 2, 40 psi (2.8 kg/cm 2 ) 7. (7.8) 250-2IN Relief Valve 2, 45 psi (.2 kg/cm 2 ) 7. (7.8) 250-2IN Relief Valve 2, 50 psi (.5 kg/cm 2 ) 7. (7.8) OILR ONTROLS 79

51 OILR ONTROLS Valves Series 260 Pressure Relief Valves or water tanks and hydronic heating systems Protects against over-pressure OILR ONTROLS Minimizes hammering with flash steam Low differential pressure psi (.2 kg/cm 2 ) between opening and closing Meets SM Pressure Vessel and oiler ode, Section IV Sealed spring chamber prevents scale or sediment build-up around seal " Inlet and 2" ischarge ast iron body, brass seat Maximum temperature 250 (2 ) Series 260 NM PLT OILR ISR VUUM RKR Maximum operating pressure range 0-50 psig ( kg/cm 2 ) imensions, in. (mm) Size Inlet Outlet 2 6 (52) (7) 4 (8) (279) Performance Model Opening Pressure SM Rating Number psig (kg/cm 2 ) TU (K-alories) 260- /2IN-0 0 (2.),00,000 (,095) 260- /2IN-6 6 (2.5),800,000 (5,079) 260- /2IN (2.8) 4,00,000 (6,270) 260- /2IN (.2) 4,500,000 (7,857) 260- /2IN (.5) 4,900,000 (9,444) Number Number escription lbs. (kg) 260- /2IN Relief Valve, 0 psi (2. kg/cm 2 ) 7. (7.8) 260- /2IN Relief Valve, 6 psi (2.5 kg/cm 2 ) 7. (7.8) 260- /2IN Relief Valve, 40 psi (2.8 kg/cm 2 ) 7. (7.8) 260- /2IN Relief Valve, 45 psi (.2 kg/cm 2 ) 7. (7.8) 260- /2IN Relief Valve, 50 psi (.5 kg/cm 2 ) 7. (7.8) 80

52 OILR ONTROLS Valves Series T-4 Test-N-heck Valves or hot water boilers Simplifies SM S-a. code mandated testing of low water cut-offs by eliminating the need to drain the system VNT PROO Includes one upper and one lower valve for mounting at crosses in equalizing lines Restricts water flow when the low water cut-off s blow down valve is open djustable built-in vacuum breaker in upper valve provides rapid evacuation of water from the float chamber " Maximum temperature 250 (2 ) Series T-4 Upper Valve OILR ONTROLS Maximum pressure 60 psi ( kg/cm 2 ) imensions, in. (mm) (8) (8) 5 (25) Upper Lower Series T-4 Lower Valve 5 4 () 6 (78) Number Number escription lbs. (kg) T Test-N-heck Valves, set of 2 5. (.4) 8