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.

High Pressure Line Valves

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

High Pressure Oxygen Cylinder Valves

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)

On/Off Control Oxygen Toggle Valve

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

M7908 Series Low Pressure Check Valves

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

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
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