SMC

Inline Poppet Check Valve 685 Series PP 1/2" FPT - BUNA

Part Number: 6850090

Alt. Part Number: FP CHK 685-8F8F-B

In Stock

out of stock

In Stock

$11.57 Regular price


The 685 Series Poppet Check Valve Prevents reverse flow and cross contamination and incorporates a thin elastomer disc supported by a poppet that seals on the seat. Pressure in the flow direction moves the seal off the seat first before pressure builds enough to move the poppet away from the seat. The 685 Series Check Valve maximum operating pressure of 125 psi covers a wide range of air and fluid applications. The 685 Check is a compact design with a light cracking pressure, high flow rate, and a positive seal at very low back pressure or slight vacuum. For higher cracking pressure applications, an embedded o-ring poppet is substituted for the standard elastomer disc poppet.

Specification: 
  • Material Polypropylene Body & Poppet, Black.  Custom order: White 
  • Seal Buna-N.  Custom order:  Ethylene Propylene or Fluoroelastomer (Viton®) 
  • Inlet x Outlet 1/2 Female NPT X 1/2 Female NPT 1/2 Female NPT x 1/2 Male NPT 1/2 Male NPT x 1/2 Female NPT 1/2 Male NPT x 1/2 Male NPT 
  • Cracking Pressure 302 Stainless Spring @ 1/3 psi.  Custom order:  1, 3, 7 psi or Hastelloy Spring @ 1/3, 1, 3 psi. 


Details

Body Material

Polypropylene

O Rings

Buna-N

Operating Pressure Range

125 psi

Origin

USA




The 685 Series Poppet Check Valve Prevents reverse flow and cross contamination and incorporates a thin elastomer disc supported by a poppet that seals on the seat. Pressure in the flow direction moves the seal off the seat first before pressure builds enough to move the poppet away from the seat. The 685 Series Check Valve maximum operating pressure of 125 psi covers a wide range of air and fluid applications. The 685 Check is a compact design with a light cracking pressure, high flow rate, and a positive seal at very low back pressure or slight vacuum. For higher cracking pressure applications, an embedded o-ring poppet is substituted for the standard elastomer disc poppet.

Specification: 
  • Material Polypropylene Body & Poppet, Black.  Custom order: White 
  • Seal Buna-N.  Custom order:  Ethylene Propylene or Fluoroelastomer (Viton®) 
  • Inlet x Outlet 1/2 Female NPT X 1/2 Female NPT 1/2 Female NPT x 1/2 Male NPT 1/2 Male NPT x 1/2 Female NPT 1/2 Male NPT x 1/2 Male NPT 
  • Cracking Pressure 302 Stainless Spring @ 1/3 psi.  Custom order:  1, 3, 7 psi or Hastelloy Spring @ 1/3, 1, 3 psi. 

Details

Body Material

Polypropylene

O Rings

Buna-N

Operating Pressure Range

125 psi

Origin

USA


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