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Inline Check Valve


1/8” - 3/4” NPT
Vacuum - 800 Psig

Description

A compact, inline, direct acting poppet check valve suitable for pressure and vacuum applications. Bubble tight sealing is achieved by a line of contact between a precision machined seat and a standard elastomer O-ring with minimum differential pressure, regardless of mounting attitude. Floating poppet and fluted retainer design provides laminar flow. Metal to metal positive stop ensures long service life.

Technical Data

  • Nominal Crack Pressures: .15, 1 & 3 Psig (0.01, 0.07 & 0.21 bar)
  • Proof Pressure: 1200 Psig (83 bar)
  • Operating Pressure Range: Vacuum - 800 Psig (55 bar)
  • Leakage: Zero @ > 0.5 Psig Back Pressure (0.03 bar)
  • Temperature Rating:
    -80°F to 375°F (-62°C to 190°C)
    based on seal material

Materials of Constructions

Component Valve Body Material
Brass Stainless Steel1
Body, Poppet Brass, ASTM B16 316 SS, ASTM A479
Spring Retainer Brass, ASTM B162 316 SS, ASTM A479
Spring 302 SS, ASTM A313
O-Ring3 Buna-N Viton™
Retaining Ring Zinc Plated Carbon Steel Stainless Steel
1 Stainless Steel available in 1/8”, 1/4”, 3/8” & 1/2” Male x Male only
2 1/8” & 1/4” Brass valves have 316SS retainer
3 Lubricated with Krytox™

Dimensionsional Data


Pipe Size (NPT) Port Configuration A (inches) Hex Orifice (inches) Cv Flow at Max Psid1 (SCFM)
Inlet Outlet
1/8" Male Male 1.312 1/2" 0.140 0.4 7.2
Female Female 1.687
Female Male 1.437
1/4" Male Male 1.592 5/8" 0.193 0.8 14.3
Female Female 1.937 3/4"
Female Male 1.500
3/8" Male Male 1.610 3/4" 0.270 1.2 21.5
1/2" Male Male 2.140 7/8" 0.327 2.0 35.5
3/4" Male Male 2.160 1-1/8" 0.467 5.0 90.0
1 Maximum allowable pressure drop 15 Psid.
Flow tested in accordance with ISA S75.02 with air. Restrictions in the inlet or outlet piping may reduce flow.

Ordering Information

PROPER COMPONENT SELECTION - When specifying a component, the total system design must be considered to ensure safe and trouble-free performance. Intended component function, materials compatibility, pressure ratings, installation, environment and maintenance are the responsibility of the system designer.