Aluminum Back Pressure Regulator: 1/4 in FNPT


Anodized aluminum back pressure regulator, 1/4 in FNPT. Maximum rated pressure: 6000 psi (414 bar). Outlet pressure adjustment range: 300-5000 psi (21-345 bar). The set pressure can be adjusted by loosening the jam nut and turning the adjusting screw.


Also known as a priority valve, the model 211 is a fully balanced, economical regulator. It serves a wide variety of uses, however its main use is on small compressors. The regulator will improve moisture separator efficiency and filter life as much as 450%. This is done by maintaining pressure in the separator and filter at 1800 psi or more when tank pressure is lower. It has two outlet ports permitting attachment of a filling yoke and gauge directly to the regulator. This eliminates costly fittings.


Type Back pressure regulator
Maximum Rated Pressure 6000 psi (40 MPa)
Outlet Pressure Setting Range/Adjustment Range 300-5000 psi (21-345 bar)
Inlet Port Size 1 ea 1/4 in FNPT
Outlet Port Size 2 ea 1/4 in FNPT
Outlet Pressure Rating 6000 psi (414 bar)
Flow Capacity 2 to 50 SCFM
Leakage Zero external; 0.05 SCFM internal
Weight 6.9 oz (195 g)
Size (L x W x H) 3.7 x 1.5 x 1 in
Minimum Temperature -15ºF (-26ºC)
Body Material Anodized Aluminum
Internal Materials Brass
Seal Materials Viton
Flow Coefficient (Cv) 0.15

Typical Applications

  • Separator and filter systems
  • Compressors
  • Control systems
  • Cascading systems