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Conrader SRV250 Soft Seat Safety Valves

Set Pressure Range: 25-450 psig

Set Pressure Tolerance:

  • +/- 2 psig up to and including 70 psig, +/-3% of set pressure greater than 70 psig.
  • As required in paragraph UG-134(d)(1) of the ASME Boiler & Pressure Vessel Code Sec. VIII Div. 1.

Seat Leakage:

  • Bubble Tight within 5 psig for set pressure 50 psig or less.
  • Bubble Tight within 10% for set pressure greater than 50 psig.
  • As required in paragraph 2.2.3 of API 527.

Flow Factor (Slope Method): 0.74

Operating Temperature Range: -65F to 400F

Materials of Construction:

  • Seat, Cap, Piston: ASTM B16 Brass
  • Spring: 17-7 Stainless Steel
  • Seal: Silicone or Viton

Valve Options:

  • Valve Material: ASTM B16 Brass or ASTM A582 Stainless
  • Compliance: European PED 2014/68/EU, "CE" Stamp
  • Seal: Silicone (-65F to 400F) or Viton (-15F to 400F)
  • High Pressure Setting: 351-450 PSI
  • Plating: Nickel Plating
  • Inlet NPT Sizes: 1/8" NPT or BSPT, 1/4" NPT, BSPT, or BSPP, 3/8" NPT, BSPT, or BSPP


  • ASME Boiler & Pressure Vessel Code Section VIII Division 1
  • CSA B51 Boiler, Pressure, Vessel, and Pressure Piping Code