Static Pressure continued | Pressure Switches For use with hard wired systems
Switch Rating
Action Press.
Range of Operating Pressures
Max
Max
Differential
Switch
Static
Ambient Temp F
Pressure
120Vac 240Vac
Designation
Service
Rise
psi
(Dead Band) (Amps) (Amps) Approvals
Enclosure Notes
8757-B4-15P 8757-B4-30P 8757-12-50P
Gas, Air, Oil SPDT1 2.25-15 psi 120,500 (6)
150 150 203
0.5-1.5 psi 0.5-1.5 psi 0.5-4 psi
15 15
15 15
FM, UL,CE FM, UL, CE
4X 4X
1,5,6,8,9 1,5,6,8,9
Gas, Air, Oil SPDT1 Gas, Air, Oil SPDT1
4.5-30 psi
120,500 (6) 300,500 (6)
3-50 psi
5
5
CE,ANSI/ISA 4X,Class I,II 1,5,6,9 12.27.01 Div. I, II UL, cUL CE,ANSI/ISA 4X,Class I,II 1,5,6,9 12.27.01 Div. I, II UL, cUL FM, UL, CE 4X 1,5,6,8,9
8757-B4-60P 8757-12-100P
Gas, Air, Oil SPDT1 Gas, Air, Oil SPDT1
9-60 psi 5-100 psi
120,500 (6) 300,500 (6)
150 203
1.0-3.5 psi 1.0-8 psi
15
15
5
5
8757-B4-100P 8757-B4-200P
Gas, Air, Oil SPDT1 15-100 psi 400,1000 (6) Gas, Air, Oil SPDT1 30-200 psi 400,1000 (6)
150 150 150 150
1.5-5 psi 5-13 psi
15 15
15 15
FM, UL, CE FM, UL, CE
4X 4X
1,5,6,8,9 1,5,6,8,9
8757-L404F1078 8757-L404F1102
Steam Steam
SPDT1 SPDT1
5-50 psi 10-150 psi
85
6-14 psi 10-22 psi
8 8
5.1 5.1
UL, CSA UL, CSA
1 1
1,4 1,4
225
Differential Pressure | Pressure Switches For use with hard wired systems
Action
Range of Operating Pressures 1-30"wc 1-30"wc 0.5-5 psi 0.5-5 psi 0.5-5 psi 5-80"wc 3-30 psi 0.2-2.4"wc 0.4-4.0 wc 1-20"wc 12-60"wc 40-200"wc
Max
Max
Differential
Switch Rating
Switch
Pressure
Static Ambient
Pressure
120Vac 240Vac (Amps) (Amps)
Designation
Service
Rise
psi
Temp F
(Dead Band)
Approvals Enclosure
Notes
8757-PG70-153/P1 8757-PG72-804/P1 8757-PG70-153/P2 8757-PG72-804/P2 8757-PGW70-153/P2 8757-H400K-455 8757-H400K-457
Air Air Air Air Air
SPDT1 DPDT2 SPDT1 DPDT2 SPDT1 SPDT1 SPDT1 SPDT1 SPDT1 SPDT1 SPDT1 SPDT1 SPDT1 SPDT1 SPDT1 SPDT1
2 2
180 180 180 180 180 160 160 176 176 176 176 176 150 150 150 150
4"wc 8"wc
15
8 5 8 5 8
UL UL UL UL UL
1 1 1 1
1
5
2
10 10 10
0.5 psi
15
1
1 psi
5
2
0.5 psi
15
3R
1
Air Air
225 225 8.5 8.5 8.5 8.5 8.5
1-4"wc
15 15
15 15
FM, UL, CE FM, UL, CE
4X 4X
1 1
0.1-0.4 psi
8757-DG-2I 8757-DG-4I 8757-DG-20I 8757-DG-60I 8757-DG-200I 8757-A4-1.2I 8757-A4-4I 8757-A4-20I 8757-A4-60I
Gas, Air Gas, Air Gas, Air Gas, Air Gas, Air
0.08-0.12"wc 0.1-0.16 wc 0.31-0.59"wc 1.17-1.95"wc 3.12-6.63"wc
5 5 5 5 5
5 5 5 5 5
FM, UL FM, UL FM, UL FM, UL FM, UL
IP65 IP65 IP65 IP65 IP65
1,3 1,3 1,3 1,3 1,3 1,3 1.3 1,3 1,3
Air Air Air Air
0.16-1.2"wc
7 7 7 7
0.12"wc 0.2"wc 0.4"wc 1.2"wc
5 res,3 ind n/a 5 res,3 ind n/a 5 res,3 ind n/a 5 res,3 ind n/a
FM FM FM FM
4 4 4 4
0.4-4"wc 1-20"wc 12-60"wc
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 ¼ " 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 2019.
Bulletin 8757 page 4
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