Ozone Check Valves

Posted by Joel Leusink on February 21, 2011 under Ozone Products | Be the First to Comment

Check valves are a big deal in the ozone world.  This is the cheapest and easiest method of preventing water back flow into an Ozone Generator.  There are a variety of check valves and many different applications where they are used.  Due to the questions about check valves, I recently put together a list of information to help sort through the options.

This information is listed HERE at our Check Valve Page.

CVLP – Low Pressure Check Valve

• Low pressure check valve for low pressure (less than 25 PSI)
• Free floating diaphragm will seal with very small pressure differentials
• Very low crack pressure < 0.25 PSI
• Free floating diaphragm will not provide a positive seal every time, expect some water leakage through seal
• Barbed fittings make this an easy check valve to install
• Kynar construction and Viton seal will be ozone resistant up to ~5% ozone, also ozone by-products can deteriorate Viton seal

CVHP – High Pressure Check Valve

• High pressure check valve for high pressures (up to 200 PSI)
• Stainless steel spring and ball provide positive, tight seal
• Crack pressure of ~2 PSI – (crack pressure may vary between valves)
• Crack pressure of ~2 PSI – (crack pressure may vary between valves)
• Male NPT connections require threaded connections to this valve
• Kynar construction and Viton seal will be ozone resistant up to ~5% ozone, also ozone by-products can deteriorate Viton seal

CVSS – Stainless Steel Check Valve

• High pressure check valve for high pressures (up to 200 PSI)
• Stainless steel spring and ball provide positive, tight seal
• Standard valve uses 0.5 PSI crack pressure, other crack pressures are available upon request
• Open design offers very high flow, and very little flow restriction
• Female NPT connections require threaded connections to this valve
• Viton, or PTFE seal designs are available on stainless steel valves
  • PTFE seal will be most ozone resistant and longest lasting seal available.
  • Viton seal will be ozone resistant up to ~5% ozone, also ozone by-products can deteriorate Viton seal.
  • 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.