Breathing Air Valve – CGA950 Post Valve, 1/2″ NGT – 25+ Valves

This Sherwood Breathing Air Post Valve CGA950 is made from heavy-duty forged brass and is specifically designed for use with breathing air in steel cylinders. These breathing air valves have a CGA950 valve outlet with a 1/2″ NGT inlet and safety (burst disk).


Premium Construction

  • Inert PTFE packing provides leak-free stem seal, long cycle life and resistance to corrosion.
  • Secondary O-ring helps to provide a secure seal under vacuum purging and low-pressure operation.
  • Strong, durable body is made from extruded brass rod and coated with a protective chrome finish.
  • Chamber design protects threads and stem from damage.
  • Exceptional machining finishes for low-torque sealing and long packing life.
  • Durable lower plug is made of tough naval brass and coated with PTFE for lubricity.
  • Pressure Relief Device is an integrated assembly to ensure proper assembly and to resist tampering.
  • Designed for use with all yokes made to CGA 860 drawing specifications.


Valve Features

  • Gas Service: Breathing Air
  • CGA950 outlet
  • Inlet Thread Size: 1/2″ NGT
  • Safety CG-4
  • Maximum Working Pressure: 3360 PSI
  • Operating Temperature Range: -50° F to +149° F
  • Storage Temperature Range: -65° F to +155° F
  • Leak Rate Internal/External: 1×10-3 cc/sec.
  • Cv Flow Factor: Standard: .102
  • Minimum Cycle Life: 5000 Cycles
  • Opening Torque: 8–10 in.-lbs.
  • Closing Torque: 8–10 in.-lbs.
  • Operating Torque: 10–30 in.-lbs.
  • Bonnet Torque: 25–30 ft.-lbs.
  • PRD Torque: 50–65 in.-lbs.
  • Pin Indexing Hole Numbers: Pins #1 and #5
  • Automated assembly and testing processes ensure exceptional quality

Must be installed by a qualified cylinder technician due to torque specifications. Compressed gas cylinders and valves are dangerous. Please use caution.

Have questions? Email us at [email protected].

Weight 2 lbs
Dimensions 4 × 2 × 3 in


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