Action 

Range 

of 

Max 

Max 

Diff erential

 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 

 

8757-PG72-804/P1 Air  DPDT2 1-30"wc  2  180 

8"wc 

5  5 

UL 

 

8757-PG70-153/P2 

Air 

SPDT1 

0.5-5 psi 

10 

180 

0.5 psi 

15 

UL  

8757-PG72-804/P2 

Air 

DPDT2 

0.5-5 psi 

10 

180 

1 psi 

UL  

8757-PGW70-153/P2 

Air 

SPDT1 

0.5-5 psi 

10 

180 

0.5 psi 

15 

UL  

3R 

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-2I Air 

SPDT1 

0.2-2.4"wc 

8.5 

176 

0.08-0.12"wc 

FM, 

UL 

IP65 

1,3

8757-DG-4I 

Air 

SPDT1 

0.4-4.0 wc 

8.5 

176 

0.1-0.16 wc 

FM, UL 

IP65 

1,3

8757-DG-20I Air 

SPDT1 

1-20"wc 

8.5 

176 

0.31-0.59"wc 

FM, 

UL 

IP65 

1,3

8757-DG-60I Air 

SPDT1 

12-60"wc 

8.5 

176 

1.17-1.95"wc 

FM, 

UL 

IP65 

1,3

8757-DG-200I Air 

SPDT1 

40-200"wc 

8.5 

176 

3.12-6.63"wc 

FM, 

UL 

IP65 

1,3

8757-A4-1.2I 

Air 

SPDT1 

0.16-1.2"wc 

150 

0.12"wc 

5 res,3 ind  n/a 

FM, UL,CSA 

1,3 

8757-A4-4I 

Air 

SPDT1 

0.4-4"wc 

150 

0.2"wc 

5 res,3 ind  n/a 

FM, UL, CSA 

1.3

8757-A4-20I 

Air 

SPDT1 

1-20"wc 

150 

0.4"wc 

5 res,3 ind  n/a 

FM, UL, CSA 

1,3

8757-A4-60I 

Air 

SPDT1 

12-60"wc 

150 

1.2"wc 

5 res,3 ind  n/a 

FM, UL, CSA 

1,3

Switch Rating

Switch Rating

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 buff er.   

  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 buff er.

6.  The fi rst 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 defi ned 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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  

 

Action 

Range of 

Max 

Max 

Diff erential

 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 

CE,ANSI/ISA  4X,Class I,II  1,5,6,9

 

 

 

    

 

 

    

12.27.01 

Div. 

I, 

II 

 

 

 

    

 

 

    

UL, 

cUL

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 

CE,ANSI/ISA  4X,Class I,II  1,5,6,9

 

 

 

    

 

 

    

12.27.01 

Div. 

I, 

II 

 

 

 

    

 

 

    

UL, 

cUL 

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 

5.1 

UL, CSA 

1,4

8757-L404F1102 

Steam 

SPDT1 

10-150 psi 

225 

150 

10-22 psi 

5.1 

UL, CSA 

1,4

Static Pressure continued | Pressure Switches

For use with hard wired systems

Diff erential Pressure | Pressure Switches

For use with hard wired systems

Catalog Combustion 2021 - Page 1684

Fives Group
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FIVES GROUP-FIVES GROUP-1684-1668

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