SPR series


The SPR Series Sub atmospheric Pressure Regulator is designed for the introduction of a low vapor pressure reactive or purge gas into a sub atmospheric process. The large diameter diaphragm provides optimum sensitivity for sub atmospheric or positive pressure control.

  • Gas service
  • 316L stainless steel or Brass (alloy 360) construction
  • Stainless steel diaphragm with PTFE lining
  • Electropolished body (316L) with better than 25 Ra finish in diaphragm cavity
  • 20 micron inlet filter
  • Bubble tight shutoff
  • Outlet pressure range is 1-30 psia (27.88 in Hg – 15.3 psig)
  • Proof pressure is 2 times maximum working pressure
  • Burst pressure is 4 times maximum working pressure
  • Weight: 3.2 lbs (1.45 kg)
  • Mounting style is surface or panel (see Outline and mounting dimensions)Maximum Temperature & Operating Inlet Pressures


Seat Material Maximum Temperature Maximum Operating Inlet Pressure
Tefzel® 150º F (66º C) @ 145 psig (1000 kpa)
Viton® 250º F (121º C) @ 145 psig(1000 kpa)
Kalrez® 250º F (121º C) @ 145 psig(1000 kpa)



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