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CVLU Check Valve Series for Low Operating Pressure, Union Straight

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SKU: CVLU Categories: , Tags: , ,



  • Push-in fitting type resin check valve for low operating pressure.
  • Opening pressure at 5kPa, securing air flow at lower pressure than that of the conventional check valves do not. (Opening pressure is the initial pressure on the secondary side when the pressure is applied from free flow side.)
  • Low level ozone proof; rubber parts made of HNBR and FKM.
  • No springs incorporated; less noise generation compared to the conventional valves.
  • Resin material contributes to low cost and its lightweight body.


  • Fluid admitted: Air
  • Maximum operating pressure: 145psi (1.0MPa)
  • Working vacuum: -29.5inHg (-100kPa)
  • Opening pressure: 5kPa at 25°C
  • Minimum opening differential pressure: 0.01MPa
  • Service temperature range: 32~140°F (0~60°C) (No freezing)
  • Material
Parts Material (Standard Type)
Resin body PBT
Valve fastening Nickel-plated brass
Valve packing FKM
Elastic sleeve HNBR
Guide ring Nickel-plated brass
Release ring POM
Lock claws Stainless steel





  • Shut-off valves to turn on and off air pressure to a pneumatic device or a circuit.
  • The 3-way, pressure relief type isolates the supplied air pressure and exhausts the downstream (connected device) pressure when turned off; suitable for maintenance purpose, and sometimes necessary for protection against device malfunction.
  • The 2-way type holds the downstream pressure; ideal for the application where the residual pressure maintained such as an air tank or some vacuum system.
  • 4 options available
  • Straight A type.
  • Straight B type.
  • Union straight type.
  • Nipple type.


  • Fluid admitted: Air
  • Maximum pressure range: 0~131psi (0~0.9MPa)
  • Working vacuum: -29.5inHg (-100kPa)
  • Service temperature range: 32~140°F (0~60°C) (No freezing)


Parts Material (Standard Type)
Metallic body Nickel-plated brass
Resin body PBT
O-ring Nitrile rubber
Lock claws Stainless steel
Release ring Polyacetal
Elastic sleeve Nitrile rubber
Spool Nickel-plated brass
Cap knob Polyacetal

PISCO-CVLU Check Valve for Low Operating Pressure-01

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