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SMC 6431290 Brass Piston Check Valve - 1/4in. MNPT, 500PSI

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This 410 Series brass inline piston check valve has 1/4 inch threaded male connections and a Buna-n seals. Rated for up to 500 PSI.


Technical Specifications

Max PSI: 500
Inlet Port: 1/4 inch
Max Temperature: 180 degrees F
Outlet Port: 1/4 inch

Product Description

1/4in. Brass Check Valve

The 410 piston check valve uses a piston with an embedded o-ring that seals on the seat. Pressure in the flow direction moves the piston and seal off the seat and exposes the cross holes in the piston. Features a compact design and a positive seal at very low back pressure or slight vacuum.

Dimensions: .69" diameter x 1.63" length 


  • 1/4" MNPT inlet
  • 1/4" MNPT outlet
  • Buna-N seals
  • Beryllium copper retainer
  • Good for a wide range of air & fluid applications
  • .203" diameter through hole in ball
  • Cracking pressure: 1 psi
  • Maximum pressure: 500 psi
  • Maximum temperature: 180°F

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