Control & Check Valves

Whether you have requirements for manual or remote operation of oxygen cylinders, line valves or directional low pressure check valves, FPI offers a host of quality valves manufactured to strict standards.

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Control & Check Valves

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Part Specifications:

FPI P/N 5425 high pressure oxygen valve is designed to provide on/off system control or isolation of oxygen distribution lines.

  • Manufactured I/A/W MIL-V-8612 (s/s AN6012)
  • Hand wheel design with neoprene wrap
  • Brass construction
  • 2000 PSI operating pressure – 5000 PSI proof pressure
  • Mounting via plate with (4) #5 holes on 2.0” centers
  • Operating Temperature -65F to 165F
  • Pressure drop 5 PSI max @ 65 LPM
  • 1/8” ANPT line connections

FPI P/N 2440 toggle valve is designed for use with low pressure oxygen systems, providing on/off activation of isolated oxygen system components. Designated as CRU-18/A by the U.S. Government, these valves are manufactured to comply with MIL-V-38224.

  • Operating Pressure 0 to 150 PSI
  • Pressure Drop 3 PSI max @ 100 lpm with 70 PSI inlet pressure
  • Operating Temperature -65F to 160F
  • Bulkhead mounting possible via (2) 8-32 2B x 5/16” holes in face plate
  • 1/8” ANPT Inlet and Outlet port connections
  • Media – Aviators Breathing Oxygen
  • Toggle provides positive full opening

FPI’s oxygen cylinder valves are manufactured I/A/W MIL-PRF-9439 and are designed to provide manual on/off control of high pressure oxygen cylinders.

  • Available in two inlet sizes – P/N 5500 - 1⁄2” ANPT & P/N 5501 - 1” ANPT
  • 2100 PSI operating pressure – 3000 PSI proof pressure
  • Brass construction
  • Hand wheel operation with neoprene wrap for improved comfort and grip
  • 1⁄4 to 1 turn fully-open operation
  • Overpressure safety device

Also available is FPI P/N 5410 Automatic Opening Valve. Constructed per MIL-PRF-8622 (s/s MS22012), these valves are designed to open automatically when a coupling nut is connected to the valve outlet while closing when it is disconnected, thus allowing flow from remotely located cylinders.

  • 1” ANPT Inlet
  • Flow rate at fully open 50-65 LPM
  • Operating pressure 1800 PSI
  • Brass construction
  • Overpressure rupture disk 2700 to 3000 PSI max*
  • Operating Temperature -65F to 165F
  • Pressure drop 5 PSI max @ 55 LPM !*Alternate burst disk 2500 to 2775 PSI max is available to meet 3HT PRD regulation requirements. (FPI P/N 5410-L)

FPI offers a large number of low pressure oxygen check valves designed per MIL-PRF-7908 (s/s MS21211) to provide directional control of low pressure oxygen systems.

  • Assembly leak tight to 450 PSI – Check leakage 1 cc/minute max in check direction @ 10 to 450 PSI
  • Proof Pressure 750 PSI
  • Pressure Drop 10 PSI maximum
  • Operating temperature -65F to 160F
  • Media – Aviators Breathing Oxygen

Scroll chart horizontally to view specs

FPI P/N Description Mil-Spec P/N Supersedes
4200 Check – flared tube to flared tube M7908-1 MS21211-1
4425 Dual check – tee, end pipe thread to flared tube M7908-2 MS21211-2
4380 Dual check – tee, side pipe thread to flared tube M7908-3 MS21211-3
4390 Dual check – tee, flared tube M7908-4 MS21211-4
4275 Triple check – cross, flared tube M7908-5 MS21211-5
4415 Check – pipe thread to flared tube M7908-6 MS21211-6
4201 Check – flared tube to pipe thread M7908-7 MS21211-7
4395 Check – side pipe thread to flared tube M7908-8 MS21211-8