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1/2 & 3/4 NPTF Balanced Pilot Operated Check Valves

Patents Pending

Basic Operation:

Lock your pneumatic device in position when a pressure drop or total loss of pressure occurs. Manual release for exhausting trapped air before maintaining the system (OSHA Requirement).

  • Immediate Checking
  • Optional Manual Release
  • .0000522 cc/min Leak Rate
  • Low & High Temp

Operating Data:

Max Pressure:
150 psi
Min. Pilot Pressure:
40 psi
25 psi (see table)
Leak Rate:
.0000522 cc/min
Temp. Range:
30 - 150 F
30-350 F (see table '-V')
-40-150 F (see table '-T40')
Cycle Rate:
1 cyc./sec. max.
Flow Capacity (Cv):
3.8 max
Cracking Pressure:
1-2 psi
Properly filtered dry air or lubricated air.

Model No. 1/2 NPTF 3/4 NPTF
No Manual Release B8100 B12100
Manual Release B810M B1210M
Flush Manual Release B81FM B121FM
For a lower pilot pressure add (-K18) to the model # (ex. B810M-K18).
For high temp seals add (-V) to the model # (ex. B810M-V).
For low temp seal add (-T40) to the model # (ex. B810M-T40).

Product Specs: (Click to see a larger images)