Combustion North American Pressure Switches Bulletin 8757 Pressure switches are used with Automatic Shutoff Valves or Solenoid Valves to interrupt fuel flow in the event of fuel or air failure. They are also used with Supervising Valve Systems (Bulletin 1857) and to protect regulators and other control devices from excessive pressures. North American offers a variety of standard snap-acting pressure switches to monitor both static and differential pressures. Standard pressure switches are offered in multiple ranges and for different process fluids including air, natural gas, oil and steam. For applications requiring explosion-proof switches, oxygen service, or any other special requirement, contact North American for further information. 8757-GAO, -GML, -GMH: Pressure switches for gas or air Ranges from 0.16 wc to 200 wc NEMA 4 enclosure FM, UL, CSA approved 8757-12: Pressure switches for gas, air or oil Ranges from 4 wc to 100 psi UL, CE, ANSI/ISA 12.27.01 approved Class I, II, Div. I, II 8757-B4, - D4: Pressure switches for gas, air or oil Ranges from 4.5 wc to 200 psi UL, CE, FM approved 8757-DG: Pressure switches for gas or air Ranges from 0.2 wc to 200 wc FM and UL approved 8757-xNN: Pressure switches for air Ranges from 2 PSI to 180 PSI SPDT snap-action switch NEMA 4X enclosure FM approved 8757-PG, -DS: Pressure switches for air Ranges from 1 wc to 150 PSI FM, UL, CSA approved 8757-H400: Pressure switch for air Ranges from 2 wc to 100 PSI SPDT snap-action switch NEMA 4X enclosure FM, UL, CE approved 8757-L404: Pressure switches for steam Ranges from 5 PSI to 150 PSI Snap-action switch NO, NC, SPDT UL, CSA approved
Buletin 8757 page 2 PRESSURE SWITCHES - STATIC PRESSURE Action Range of Max Max Differential Switch Rating Switch Press. Operating Static Ambient Pressure 120Vac 240Vac Designation Service Rise Pressures psi Temp F (Dead Band) (Amps) (Amps) Approvals Enclosure Notes 8757-PG70-153/P1 Air SPDT1 1-30" wc 15,20 (6) 180 4" wc 15 8 UL 1 1,6 8757-PG72-804/P1 Air DPDT2 1-30" wc 15,20 (6) 180 8" wc 5 5 UL 1 2,6 8757-PG70-153/P2 Air SPDT1 0.5-5 psi 15,20 (6) 180 0.5 psi 15 8 UL 1 1,6 8757-PG72-804/P2 Air DPDT2 0.5-5 psi 15,20 (6) 180 1 psi 5 5 UL 1 2,6 8757-H400-441 Air SPDT1 0-10" wc 3,225 (6) 160 0.15-0.3" wc 15 15 FM, UL, CE 4X 1,6 8757-H400-442 Air SPDT1 0-20" wc 3,225 (6) 160 0.2-0.5" wc 15 15 FM, UL, CE 4X 1,6 8757-H400-443 Air SPDT1 0-80" wc 3,225 (6) 160 0.5-1.8" wc 15 15 FM, UL, CE 4X 1,6 8757-H400-453 Air SPDT1 0-20 psi 20,225 (6) 160 0.05-0.2 psi 15 15 FM, UL, CE 4X 1,6 8757-H400-454 Air SPDT1 0-30 psi 30,225 (6) 160 0.05-0.3 psi 15 15 FM, UL, CE 4X 1,6 8757-DSF-7231/4 Air SPDT1 1-35 psi 35 180 1.5 psi 15 15 FM, UL, CSA 1 1,3 8757-DSF-7231/7 Air SPDT1 5-150 psi 150 180 3 psi 15 15 FM, UL, CSA 1 1,3 8757-12NNCA4 Air SPDT1 0.5-6 psi 200,400 (6) 180 0.4 psi 22 22 FM 4X 1,6 8757-12NNCA45 Air SPDT1 1-16 psi 200,400 (6) 180 0.6 psi 22 22 FM 4X 1,6 8757-4NNCA4 Air SPDT1 2-25 psi 750,1000 (6) 180 1.2 psi 22 22 FM 4X 1,6 8757-4NNCA5 Air SPDT1 3-50 psi 750,1000 (6) 180 1.6 psi 22 22 FM 4X 1,6 8757-4NNCA45 Air SPDT1 4-75 psi 750,1000 (6) 180 2.0 psi 22 22 FM 4X 1,6 8757-6NNCA3 Air SPDT1 12-100 psi 1500,2500 (6) 180 3.6 psi 22 22 FM 4X 1,6 8757-6NNCA5 Air SPDT1 20-180 psi 1500,2500 (6) 180 5.6 psi 22 22 FM 4X 1,6 8757-GAO-A4/4/2 Gas, Air SPDT1 0.16-1.2" wc 7 140 0.12" wc 10 5 FM, UL, CSA 4 1,3 8757-DG-2I Gas, Air SPDT1 0.2-2.4" wc 8.5 176 0.08-0.12" wc 5 5 FM, UL IP65 1,3 8757-DG-4I Gas, Air SPDT1 0.4-4.0" wc 8.5 176 0.1-0.16" wc 5 5 FM, UL IP65 1,3 8757-GAO-A4/4/3 Gas, Air SPDT1 0.4-4.0" wc 7 140 0.2" wc 10 5 FM, UL, CSA 4 1,3 8757-GAO-A4/4/5 Gas, Air SPDT1 2-20" wc 7 140 0.4" wc 10 5 FM, UL, CSA 4 1,3 8757-DG-20I Gas, Air SPDT1 1-20" wc 8.5 176 0.31-0.59" wc 5 5 FM, UL IP65 1,3 8757-GML-A4/4/4 Gas, Air SPDT1 1-20" wc 7 140 0.4" wc 10 5 FM, UL, CSA 4 1,3,7 8757-GAO-A4/4/6 Gas, Air SPDT1 12-60" wc 7 140 1.2" wc 10 5 FM, UL, CSA 4 1,3 8757-DG-60I Gas, Air SPDT1 12-60" wc 8.5 176 1.17-1.95" wc 5 5 FM, UL IP65 1,3 8757-GML-A4/4/6 Gas, Air SPDT1 12-60" wc 7 140 1.2" wc 10 5 FM, UL, CSA 4 1,3,7 8757-GMH-A4/4/6 Gas, Air SPDT1 12-60" wc 7 140 1.2" wc 10 5 FM, UL, CSA 4 1,3,7 8757-GAO-A4/4/8 Gas, Air SPDT1 40-200" wc 14 140 4.0" wc 10 5 FM, UL, CSA 4 1,3 8757-DG-200I Gas, Air SPDT1 40-200" wc 8.5 176 3.12-6.63" wc 5 5 FM, UL IP65 1,3 8757-12-20I Gas, Air, Oil SPDT1-20-20" wc 75, 100 (6) 203 0.5-3.5" wc 5 5 CE,ANSI/ISA 4X,Class I,II 1,5,6,9 8757-D4-30I Gas, Air, Oil SPDT1 4.5-30" wc 40,160 (6) 150 1.5-2.5" wc 15 15 FM, UL, CE 4X 1,5,6,8,9 8757-12-50I Gas, Air, Oil SPDT1 2-50" wc 75, 100 (6) 203 0.5-5" wc 5 5 CE, ANSI/ISA 4X,Class I,II 1,5,6,9 8757-D4-60I Gas, Air, Oil SPDT1 9-60" wc 40,160 (6) 150 1.5-3.5" wc 15 15 FM, UL, CE 4X 1,5,6,8,9 8757-12-65I Gas, Air, Oil SPDT1 4-65" wc 25,50 (6) 203 5.5" wc 5 5 CE,ANSI/ISA 4X,Class I,II 1,5,6,9 8757-D4-100I Gas, Air, Oil SPDT1 15-100" wc 40,160 (6) 150 2.5-5.5" wc 15 15 FM, UL, CE 4X 1,5,6,8,9 8757-D4-150I Gas, Air, Oil SPDT1 22.5-150" wc 40,160 (6) 150 4.5-8.5" wc 15 15 FM, UL, CE 4X 1,5,6,8,9 8757-12-5P Gas, Air, Oil SPDT1 0.5-5 psi 25,50 (6) 203 0.4 psi 5 5 CE,ANSI/ISA 4X,Class I,II 1,5,6,9 12.27.01,UL Div. I, II 8757-12-200I Gas, Air, Oil SPDT1 10-200" wc 75, 100 (6) 203 1-10" wc 5 5 CE,ANSI/ISA 4X,Class I,II 1,5,6,9 8757-12-15P Gas, Air, Oil SPDT1 1-15 psi 300,500 (6) 203 0.5-2.0 psi 5 5 CE,ANSI/ISA 4X,Class I,II 1,5,6,9 (see page 3 for additional information)
Bulletin 8757 page 3 PRESSURE SWITCHES - STATIC PRESSURE continued Action Range of Max Max Differential Switch Press. Operating Static Ambient Pressure 120Vac 240Vac Designation Service Rise Pressures psi Temp F (Dead Band) (Amps) (Amps) Approvals Enclosure Notes 8757-B4-15P Gas, Air, Oil SPDT1 2.25-15 psi 120,500 (6) 150 0.5-1.5 psi 15 15 FM, UL,CE 4X 1,5,6,8,9 8757-B4-30P Gas, Air, Oil SPDT1 4.5-30 psi 120,500 (6) 150 0.5-1.5 psi 15 15 FM, UL, CE 4X 1,5,6,8,9 8757-12-50P Gas, Air, Oil SPDT1 3-50 psi 300,500 (6) 203 0.5-4 psi 5 5 CE,ANSI/ISA 4X,Class I,II 1,5,6,9 8757-B4-60P Gas, Air, Oil SPDT1 9-60 psi 120,500 (6) 150 1.0-3.5 psi 15 15 FM, UL, CE 4X 1,5,6,8,9 8757-12-100P Gas, Air, Oil SPDT1 5-100 psi 300,500 (6) 203 1.0-8 psi 5 5 CE,ANSI/ISA 4X,Class I,II 1,5,6,9 8757-B4-100P Gas, Air, Oil SPDT1 15-100 psi 400,1000 (6) 150 1.5-5 psi 15 15 FM, UL, CE 4X 1,5,6,8,9 8757-B4-200P Gas, Air, Oil SPDT1 30-200 psi 400,1000 (6) 150 5-13 psi 15 15 FM, UL, CE 4X 1,5,6,8,9 8757-L404F1078 Steam SPDT1 5-50 psi 85 150 6-14 psi 8 5.1 UL, CSA 1 1,4 8757-L404F1102 Steam SPDT1 10-150 psi 225 150 10-22 psi 8 5.1 UL, CSA 1 1,4 PRESSURE SWITCHES - DIFFERENTIAL PRESSURE Action Range of Max Max Differential Switch Rating Switch Pressure Operating Static Ambient Pressure 120Vac 240Vac Designation Service Rise Pressures psi Temp F (Dead Band) (Amps) (Amps) Approvals Enclosure Notes 8757-PG70-153/P1 Air SPDT1 1-30" wc 2 180 4" wc 15 8 UL 1 1 8757-PG72-804/P1 Air DPDT2 1-30" wc 2 180 8" wc 5 5 UL 1 2 8757-PG70-153/P2 Air SPDT1 0.5-5 psi 10 180 0.5 psi 15 8 UL 1 1 8757-PG72-804/P2 Air DPDT2 0.5-5 psi 10 180 1 psi 5 5 UL 1 2 8757-PGW70-153/P2 Air SPDT1 0.5-5 psi 10 180 0.5 psi 15 8 UL 3R 1 8757-H400K-455 Air SPDT1 5-80" wc 225 160 1-4" wc 15 15 FM, UL, CE 4X 1 8757-H400K-457 Air SPDT1 3-30 psi 225 160 0.1-0.4 psi 15 15 FM, UL, CE 4X 1 8757-DG-4I Air SPDT1 0.4-4.0" wc 8.5 176 0.1-0.16" wc 5 5 FM, UL IP65 1,3 8757-DG-20I Air SPDT1 1-20" wc 8.5 176 0.31-0.59" wc 5 5 FM, UL IP65 1,3 8757-DG-60I Air SPDT1 12-60" wc 8.5 176 1.17-1.95" wc 5 5 FM, UL IP65 1,3 8757-DG-200I Air SPDT1 40-200" wc 8.5 176 3.12-6.63." wc 5 5 FM, UL IP65 1,3 NOTES: 1. SPDT (Single Pole Double Throw) action means the switch makes one circuit and breaks another. 2. DPDT (Double Pole Double Throw) action means the switch makes two circuits and breaks two circuits. 3. Depending on the severity of some mechanical vibration, which may cause the pressure switch to break and remake momentarily, these switches may not be good for those types of applications. 4. A siphon (ordered seperately) must always be connected between the pressure switch and the line when used with steam to act as a themal buffer. Specify R830-6699 for 180 siphon, R830-6698 for a 90 siphon. 5. When used with pre-heated oil, a siphon loop must always be connected between the pressure switch and main pipe to act as a themal buffer. 6. The first pressure rating under heading "Max Static psi" is the max allowable pressure that can be applied without the need for recalibration. The second pressure rating is the proof pressure, which is defined as the max pressure to which the switch may be subjected to causing no permanent damage, however recalibration must be performed. 7. Manual Reset required. 8. These switches have a 1/4" vent which must be piped to an approved location. 9. These switches do not require a conduit seal to meet 4.1.3.2 of NFPA 86 2011.
PRESSURE SWITCHES - STATIC PRESSURE - 24VDC Bulletin 8757 page 4 Switch Action Range of Max Max Differential Rating Switch Press. Operating Static Ambient Pressure 24Vdc Designation Service Rise Pressures PSI Temp F (Dead Band) (Amps) Approvals Enclosure Notes 8757-J400-449-24VDC Air SPDT1 0-20" wc 3,225 (6) 160 1-2" wc 1 FM, UL, CE 4X 1.6 8757-J400-451-24VDC Air SPDT1 0-80" wc 3,225 (6) 160 1-3" wc 1 FM, UL, CE 4X 1,6 8757-H400-453-24VDC Air SPDT1 0-20 psi 20,225 (6) 160 0.05-0.2 psi 1 FM, UL, CE 4X 1,6 8757-H400-454-24VDC Air SPDT1 0-30 psi 30,225 (6) 160 0.05-0.3 psi 1 FM, UL, CE 4X 1,6 8757-DG-2I-24VDC Gas, Air SPDT1 0.2-2.4" wc 8.5 176 0.08-0.12" wc 0.1 FM, UL IP65 1 8757-DG-4I-24VDC Gas, Air SPDT1 0.4-4.0" wc 8.5 176 0.1-0.16" wc 0.1 FM, UL IP65 1 8757-DG-20I-24VDC Gas, Air SPDT1 1-20" wc 8.5 176 0.31-0.59" wc 0.1 FM, UL IP65 1 8757-DG-60I-24VDC Gas, Air SPDT1 12-60" wc 8.5 176 1.17-1.95" wc 0.1 FM, UL IP65 1 8757-DG-200I-24VDC Gas, Air SPDT1 40-200" wc 8.5 176 3.12-6.63" wc 0.1 FM, UL IP65 1 8757-12-20I-24VDC Gas, Air, Oil SPDT1-20-20" wc 75, 100 (6) 203 0.5-3.5: wc 1 res, 0.5 ind CE, ANSI/ISA 4X, Cls I, II 1,5,6,9 12.27.01, Div. I, II 8757-D4-30I-24VDC Gas, Air, Oil SPDT1 4.5-30" wc 40,160 (6) 150 1.5-2.5" wc 6 FM, UL, CE 4X 1,5,6,8,9 8757-12-50I-24VDC Gas, Air, Oil SPDT1 2-50" wc 75, 100 (6) 203 0.5-5" wc 1 res, 0.5 ind CE, ANSI/ISA 4X, Cls I, II 1,5,6,9 12.27.01, Div. I, 11 8757-D4-60I-24VDC Gas, Air Oil SPDT1 9-60" wc 40,160 (6) 150 1.5-3.5" wc 6 FM, UL, CE 4X 1,5,6,8,9 8757-D4-100I-24VDC Gas, Air, Oil SPDT1 15-100" wc 40,160 (6) 150 2.5-5.5" wc 6 FM, UL, CE 4X 1,5,6,8,9 8757-D4-150I-24VDC Gas, Air, Oil SPDT1 22.5-150" wc 40,160 (6) 150 4.5-8.5" wc 6 FM, UL, CE 4X 1,5,6,8,9 8757-12-200I-24VDC Gas, Air, Oil SPDT1 10-200" wc 75, 100 (6) 203 1-10" wc 1 res, 0.5 ind CE, ANSI/ISA 4X, Cls I, II 1,5,6,9 12.27.01, Div. I, II 8757-12-15P-24VDC Gas, Air, Oil SPDT1 1-15 psi 300,500 (6) 203 0.5-2.0 psi 1 res, 0.5 ind CE,ANSI/ISA 4X, Cls I,II 1,5,6,9 12.27.01, Div. I, II 8757-B4-15P-24VDC Gas, Air, Oil SPDT1 2.25-15 psi 120,500 (6) 150 0.5-1.5 psi 6 FM, UL, CE 4X 1,5,6,8,9 8757-B4-30P-24VDC Gas, Air, Oil SPDT1 4.5-30 psi 120,500 (6) 150 0.5-1.5 psi 6 FM, UL, CE 4X 1,5,6,8,9 8757-12-50P-24VDC Gas, Air, Oil SPDT1 3-50 psi 300,500 (6) 203 0.5-4 psi 1 res, 0.5 ind CE,ANSI/ISA 4X, Cls I,II 1,5,6,9 12.27.01, Div. I, II 8757-B4-60P-24VDC Gas, Air, Oil SPDT1 9-60 psi 120,500 (6) 150 1.0-3.5 psi 6 FM, UL, CE 4X 1,5,6,8,9 8757-12-100P-24VDC Gas, Air, Oil SPDT1 5-100 psi 300,500 (6) 203 1.0-8 psi 1 res, 0.5 ind CE,ANSI/ISA 4X, Cls I,II 1,5,6,9 12.27.01, Div. I, II 8757-B4-100P-24VDC Gas, Air, Oil SPDT1 15-100 psi 400,1000 (6) 150 1.5-5 psi 6 FM, UL, CE 4X 1,5,6,8,9 8757-B4-200P-24VDC Gas, Air, Oil SPDT1 30-200 psi 400,1000 (6) 150 5-13 psi 6 FM, UL, CE 4X 1,5,6,8,9 PRESSURE SWITCHES - DIFFERENTIAL PRESSURE - 24VDC 8757-H400K-455-24VDC Air SPDT1 5-80" wc 225 160 1-4" wc 1 FM, UL CE 4X 1 8757-H400K-457-24VDC Air SPDT1 3-30 psi 225 160 0.1-0.4 psi 1 FM, UL, CE 4X 1 8757-DG-4I-24VDC Air SPDT1 0.4-4.0" wc 8.5 176 0.1-0.16" wc 0.1 FM, UL IP65 1 8757-DG-20I-24VDC Air SPDT1 1-20" wc 8.5 176 0.31-0.59" wc 0.1 FM, UL IP65 1 8757-DG-60I-24VDC Air SPDT1 12-60" wc 8.5 176 1.17-1.95" wc 0.1 FM, UL IP65 1 8757-DG-200I-24VDC Air SPDT1 40-200" wc 8.5 176 3.12-6.63" wc 0.1 FM, UL IP65 1 NOTES: 1. SPDT (Single Pole Double Throw) action means the switch makes one circuit and breaks another. 2. DPDT (Double Pole Double Throw) action means the switch makes two circuits and breaks two circuits. 3. These pressure switches must be mounted level and where they are relatively free from vibration. 4. A siphon (ordered seperately) must always be connected between the pressure switch and the line when used with steam to act as a themal buffer. Specify R830-6699 for 180 siphon, R830-6698 for a 90 siphon. 5. When used with pre-heated oil, a siphon loop must always be connected between the pressure switch and main pipe to act as a themal buffer. 6. The first pressure rating under heading "Max Static psi" is the max allowable pressure that can be applied without the need for recalibration. The second pressure rating is the proof pressure, which is defined as the max pressure to which the switch may be subjected to causing no permanent damage, however recalibration must be performed. 7. Manual Reset required. 8. These switches have a 1/4" vent which must be piped to an approved location. 9. These switches do not require a conduit seal to meet 4.1.3.2 of NFPA 86 2011.
DIMENSIONS inches (mm) 5.09 (129.7) 5.09 (129.7) Bulletin 8757 page 5 8757-H400 4.00 4.28 (101.6) (108.7) 2.50 (63.5) 0.75-14 FNPT thru near wall only 0.875" knockout on opposite side and centered in rear of enclosure Clearance for 0.25" screw (2) mounting holes 0.25" FNPT (40.5) 2.53 (64.3) 1.53 (129.7) 5.09 (129.7) 5.50 (139.4) 4.00 (101.6) (40.5) 7.00 (177.8) 2.50 (63.5) LOW Clearance for 0.25" screw (2) mounting holes 0.25" FNPT 1.53 (38.8) 8757-H400K 0.75-14 FNPT thru near wall only 0.875" DIA. knockout on opposite side and centered in rear of enclosure HIGH 2.53 (64.3) 8757-DG
Bulletin 8757 page 6 Reset button (only applies to 8757-GML/-GMH) 3 (76) 2.75 (69.9) 1.31 (33.3) 2.22 (56.5) 1.13 (28.7) 1.03 (26.2) 2.8 (72) 5.94 (150.9) Electrical conduit 0.75" FNPT (40.4) 2.3 (58) 1.5 (37.4) 0.5" FNPT conduit 2.31 (58.7) 4.25 (108.1) 1.97 (50.1) 0.5" FNPT 0.28 (7.1) 0.4 (10) 0.25" FNPT Integrated test nipple 8757-GAO, -GML, -GMH 8757-4NN 2.75 (69.9) 1.31 (33.3) 2.22 (56.5) 1.13 (28.7) 1.03 (26.2) 2.75 (69.9) 1.31 (33.3) 2.22 (56.5) 1.13 (28.7) 1.03 (26.2) 5.78 (146.8) Electrical conduit 0.75" FNPT (40.4) 5.89 (149.5) Electrical conduit 0.75" FNPT (40.4) 2.15 (54.6) 4.25 (108.1) 1.97 (50.1) 0.5" FNPT 0.28 (7.1) 2.26 (57.4) 4.25 (108.1) 1.97 (50.1) 0.5" FNPT 3.72 (94.5) 0.73 (18.7) 0.28 (7.1) 8757-6NN 8757-12NN 4.5 (115) 3.25 (83) 2.75(70) 1.95 (50) 4.34 (111) 1.93 (49) 3.875 (99) HOLE FOR 0.5 INCH CONDUIT 0.81(21) DIFFERENTIAL ADJUSTMENT SCREW 13.18 (30) 3.75 (95) 4.95 (126) 0.18 0.34 (5 X 9) KNOCKOUT 1.81 (46) MAIN SCALE ADJUSTMENT SCREW CLEAR PLASTIC COVER 1.06 (27) 1.5 (38) 0.25" FNPT 2.12 (54) 8757-L404
2.25 (57.15) Bulletin 8757 page 7 6.01 (152.8) 1.62 (41.28) 8757-DS 0.25" MNPT 0.87 (22.23) Adjustment screws 0.62 (15.88) 0.5" Conduit hole Adjustment screw 7 (177.80) 6.01 (152.78) 8757-PG 8.25 (209.55) (3)0.20 (5.16) Mounting holes equally spaced on a 6.5 (165.10) B.C. 0.125 Female NPT negative process 45 0.87 (22.23) Conduit 30 0.5" Male NPT X 0.125" female NPT positive process 0.75 (19.05) Clearance for cover removal 0.25 (6.35) 4 (101.6) 1.42 (36.12) 0.53 (13.49) 1.18 (30.16) Factory Sealed Lead Wires 72" Lg. Factory Sealed Lead Wires 72" Lg. 0.5 Male Conduit 0.5 Male Conduit 5.5 (139.8) 3.5 (88.9) 1.25 (31.8) 5 (127) 1.25 (32) 0.5" NPT 0.5" NPT 8757-12-20I 8757-12-50I 8757-12-65I 8757-12-5P 8757-12-200I 8757-12-15P 8757-12-50P 8757-12-100P
Bulletin 8757 Page 8 4 (102) 2.31 (59) 3.32 (84) 0.75 Conduit 8757-D4-30I 8757-D4-60I 8757-D4-100I 8757-D4-150I 5.81 (147) 0.32 (8) 0.25" Vent 1.62 (41) 5.12 (130) 0.25" NPT 4 (102) 2.37 (60) 8757-B4-15P 8757-B4-30P 8757-B4-60P 8757-B4-100P 8757-B4-200P 5.75 (147) 3.31 (84) 0.75 Conduit 0.31 (8) VENT 0.25" Vent 1.62 (41) 3.25 (83) 0.25" NPT DIMENSIONS SHOWN ARE SUBJECT TO CHANGE. PLEASE OBTAIN CERTIFIED PRINTS FROM FIVES NORTH AMERICAN COMBUSTION, INC. IF SPACE LIMITATIONS OR OTHER CONSIDERATIONS MAKE EXACT DIMENSION(S) CRITICAL. WARNING: Situations dangerous to personnel and property may exist with the operation and maintenance of any combustion equipment. The presence of fuels, oxidants, hot and cold combustion products, hot surfaces, electrical power in control and ignition circuits, etc., are inherent with any combustion application. Parts of this product may exceed 160F in operation and present a contact hazard. Fives North American Combustion, Inc. urges compliance with National Safety Standards and Insurance Underwriters' recommendations, and care in operation. CONTACT US: Fives North American Combustion, Inc. 4455 East 71st Street - Cleveland, OH 44105 - USA Tel: +1 216 271 6000 - Fax: +1 216 373 4237 Email: fna.sales@fivesgroup.com www.fivesgroup.com Copyright 4-15 - Fives - All rights reserved. Bul 8757