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One Piece Check Valve


1/4” & 1/2" NPT
0 – 3000 Psig

Description

Compact one piece body, fully retained O-ring seal, poppet type check valve. Available in 1/4” and 1/2” NPT in brass or 316 stainless steel. Suitable for working pressures to 3000 Psig. A wide selection of seal materials and crack pressures make the Series OPC a quality and cost effective solution. All valves are 100% factory tested and available cleaned and packaged for oxygen service.

Features and Benefits

  • Compact One Piece Body Construction
  • Working Pressures to 3000 Psig (206 bar)
  • Full Back Pressure Rating
  • Fully Retained O-Ring Seal
  • Cracking Pressures from .3 to 25 Psig (0.02 - 1.7 bar)
  • 100% Factory tested for crack, leakage and reseal performance


Technical Data

  • Nominal Crack Pressures: .3, 1, 10, & 25 Psig (0.02, 0.07, 0.7 & 1.7 bar)
  • Maximum Pressure: 3000 Psig @ 70°F (206 bar @ 21°C)
  • Temperature Rating:
    • -80°F to 450°F (-62°C to 232°C)

    (based on seal selection, see ordering information)

Materials of Construction

Component Valve Body Material
Brass Stainless Steel
Body, Poppet, Seat
Insert, Locking Screw1
Brass
ASTM B16
316 SS,
ASTM A479
Spring 302 SS, ASTM A313
O-Ring Seal2 Buna-N VitonTM
1 1/4" Brass Valves have 316 SS locking screw
2 Lubricated with Krytox

Dimensional/Flow Data


Model Code Port Configuration A(inches) Hex Cv
Inlet Outlet
OPC-4P 1/4" Male NPT 1/4" Male NPT 1.62 9/16" 0.35
OPC-4MF 1/4" Male NPT 1/4" Female NPT 1.75 3/4"
OPC-4FF 1/4" Female NPT 1/4" Female NPT 2.41
OPC-8P 1/2" Male NPT 1/2" Male NPT 2.28 7/8" 1.20
OPC-8MF 1/2" Male NPT 1/2" Female NPT 2.83 1 - 1/16"
Flow tested in accordance with ISA S75.21 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.

For Instructions on How to Select Your Model, click here.

One Piece Check Valve
ModelSizeFile TypeDownload
OPC-4FF1/4" F x 1/4" FSTEP Download
OPC-4MF1/4" M x 1/4" FSTEP Download
OPC-4P1/4" M x 1/4" MSTEP Download
OPC-8MF1/2" M x 1/2" FSTEP Download
OPC-8P1/2" M x 1/2" MSTEP Download