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Check Valve

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Conval Clampseal® Check Valves are designed for demanding high-pressure applications where light weight and compact size are required.
  • Multiple Body Styles
  • Versatile
  • Performance

Standard Sizes

Sizes through 4"

Pressure Rating

ASME Class through 4500#

Standard Forging ASME Materials

SA105, SA182-F22, SA182-F91, SA182-F92, SA182-F316
Other materials available upon request


SW, BW, FNPT, Grayloc, or Flanged


Angle, Y, or T pattern


Piston, Ball, and Stop Check

Design Features

Pressure Seal Bonnet

The simple and effective pressure seal bonnet provides ready access for servicing with no welds to cut or seal rings or gaskets to replace. The body-to-bonnet joint integrity is maintained through countless thermal cycles.

Only Two Moving Parts

The valve is comprised of five assemblies, with the piston and spring being the only moving parts. The piston utilizes two guide rings, and the spring is Inconel X for smooth operation in any position.


CLAMPSEAL® valves are tailored to the exact requirements of our customers. No other premium forged valve offers so many options. Conval provides multiple body styles in various pressure classes and three standard materials. Other materials are available to meet customer needs. The easy interchangeability of parts means that an entire plant installation can be supported with a very low parts inventory.

World-class innovation and manufacturing of severe service industry products since 1967
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