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CVG Check Valve Series, Unequal Union Straight

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SKU: CVG Categories: , Tags: , , ,



  • Back flow-preventing valve with push-in fitting.
  • Keeps pressure in outlet side. Permits air flow in one direction but checks the flow in the opposite direction, thus keeping the output pressure at a constant level.
  • Able to maintain service pressure at-750mmHg (vacuum) and permit piping under low pressure.
  • Ideal for vacuum retention and low-pressure applications.
  • 4 options available
  • CVC, straight.
  • CVU, in-line straight.
  • CVG, in-line reducer.
  • CVF, bush.


  • Fluid admitted: Air
  • Maximum pressure range: -29.5inHg~130.5psi (0.1~0.9MPa)
  • Check valve operating pressure: 1.45psi (0.01MPa)
  • Service temperature range: 32~140°F (0~60°C) (No freezing)


Parts Metal models Resin models
Metallic body Nickle-plated brass
Spring Stainless steel
O-ring NBR
Poppet Aluminium POM
Poppet retainer N/A POM
Poppet packing N/A NBR
Resin body PBT
Elastic sleeve NBR
Lock claws Stainless steel
Release ring POM
Guide ring Nickle-plated brass
Taper pipe thread Sealock coating
Metric thread: gasket SUS304 + NBR

PISCO-CV Check Valve-01

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