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Stainless steel inline spring check valve with FNPT ends

Legris

Legris 4895 22 1/2" FNPT 316 Stainless Spring Check Valve 3.6 psi

SKU CH-1SAE-6GD24 MPN 4895

Inline spring check valve in 316 stainless steel with FKM seals, 3.6 psi cracking pressure, rated to 580 psi water and 356 °F

  • TypeDrain Components
  • MaterialHAWA
  • Corrosion-resistant 316 stainless steel body handles aggressive fluids
  • Spring-loaded inline design opens at 3.6 psi cracking pressure
  • FKM seals withstand -4 °F to 356 °F temperature range
  • 580 psi water pressure rating suits high-pressure systems
  • 1/2" FNPT connections install in horizontal or vertical orientation

1/2" FNPT 316 Stainless Spring Check Valve

This Legris 4895 check valve uses an inline spring mechanism in a 316 stainless steel body with FKM seals. It fits 1/2 inch FNPT connections and opens at a cracking pressure of 3.6 psi. The valve handles water pressure up to 580 psi and operates between -4°F and 356°F. It mounts in horizontal or vertical orientations.

Suited for corrosion-resistant inline flow control

Installations needing a compact spring-loaded check valve with 316 stainless construction and FKM compatibility will match this specification. Systems requiring a higher cracking pressure, a different connection type, or a steam-rated valve should look at other options. The 302 stainless spring and 580 psi water limit define the operating envelope.

3.6 psi cracking pressure sets the opening point

This single figure determines when the valve permits flow in the forward direction. If the system pressure differential never reaches 3.6 psi, the valve will remain closed and block the intended flow. Verify the required cracking pressure before selecting this part.

Highlights

  • Corrosion-resistant 316 stainless steel body handles aggressive fluids
  • Spring-loaded inline design opens at 3.6 psi cracking pressure
  • FKM seals withstand -4 °F to 356 °F temperature range
  • 580 psi water pressure rating suits high-pressure systems
  • 1/2" FNPT connections install in horizontal or vertical orientation

Specifications

TypeDrain Components
MaterialHAWA
BrandLegris
Model4895 22 22

Questions about this item

What pipe size and thread type must my existing plumbing have to accept this 4895 valve?

The valve connects via 1/2 inch FNPT threads on both ends, so your piping needs matching 1/2 inch male NPT connections.

Will the 3.6 psi cracking pressure and FKM seals handle the same temperatures as my older brass check valves?

This unit operates from -4 °F to 356 °F with FKM seat and seal material, a wider range than many brass valves, and the 3.6 psi spring opens at a low, consistent pressure.

How can I confirm the 4895 is sealing properly after I thread it into the line?

Pressurise the system up to the 580 psi water rating; no flow should pass in the reverse direction and the valve should open only when forward pressure exceeds 3.6 psi.

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