CVST-18 : Stainless Steel Ozone Compatible Check Valve

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Product Overview

This ozone compatible check valve ensures that liquid does not flow in an undesired direction. It incorporates a PTFE seal that can handle any ozone concentration, but it will not seal as well as their Viton counterparts (CVSS-Series).


  • Low crack pressure
  • Compatible with any ozone concentration
  • Fast acting internal spring
  • Minimal pressure loss with straight-through design

More Information

Max Operating Pressure 200 PSI (14.06 Bar)
Weight 0.4000
Dimensions Length: 2.3 in (5.9 cm) Diameter: 1.1 in (2.8 cm)
Crack Pressure 0.5 PSI (0.04 Bar)
Materials Wetted 316L stainless steel, FEP/PTFE flouropolymer
Directional Flow yes
Inlet/Outlet Connections 3/8-inch FNPT
Fitting Style FNPT


Are the CVSS series check valves a Food Grade suitable product?


Are the CVSS series check valves a Food Grade suitable product?


Viton seal or PTFE seal, which is right for you? Please read below!

Elastomer Durability
- PTFE seat will be most ozone resistant and longest lasting seal available.
- Viton seat will be ozone resistant up to ~5% ozone, also ozone by-products can deteriorate Viton seat.

Sealing Capabilities
- Viton is very pliable and will offer the most reliable seal.
- PTFE is very rigid, small particulates will keep this material from offering a positive seal.