High Flow Aluminum Reducing Regulator: 6000 psi In > 0–1500 psi Out


Aluminum high flow reducing regulator. 1/2 in NPT outlet; 1/4 in NPT inlet. Outlet pressure range: 0–1500 psi out. Maximum pressure rating 6000 psi. The model 873 is a piston type, hand loading, and self-venting regulator. It utilizes a balanced poppet design for high flow and minimum effect of inlet pressure on outlet pressure. The poppet assembly is contained in a cartridge with internal filtration for easy in-field changing.


Typical Applications

  • Component testing
  • Air tank fill stations
  • Firefighting air systems
  • Instrumentation and calibration panels
  • Process industry control
  • Shipboard and offshore air and gas control
  • Aircraft service equipment
  • Electronic industry rare gas flow
  • Vehicle CNG stations
  • Precision gas mixing equipment


Type High flow reducing regulator
Hand Loaded/Operated or Dome/Air Operated Hand/Spring Loaded
Maximum Rated Pressure 6000 psi
Outlet Pressure Range 0–1500 psi
Outlet Pressure Rating 6000 psi
Inlet Port Size 2 ea 1/4 in FNPT (one inlet, one gauge)
Outlet Port Size 1 ea 1/4 in FNPT (gauge), 1 ea 1/2 in FNPT (outlet)
Flow Coefficient (Cv) 0.8 (equals 0.23 in orifice)
Outlet Pressure Variations with Inlet Pressure Variations 35 psi rise/1000 psi inlet drop
Leakage Bubble tight
Weight 1300 g
Overall Length 6.5 in
Round Diameter 3 in
Minimum Temperature -15ºF
Body Materials Anodized aluminum
Internal Materials Anodized aluminum, Brass, Stainless
Seal Materials Kel-F, Viton