BARV Series Tri-Clamp Air Relief Valve

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  • Regular price $98.00

The BARVE Air Relief Valves are used primarily when removal of air from a line without loss of product is a concern. How it functions is a ferrule, a housing with a plastic ball, and a vent pipe all connected using standard tri-clamps. This design will not let air enter the line under negative pressure, It is also double seated.

A vacuum will cause the valve to open slightly, but not fully as that would cause the entire line to drain quickly. The polymer ball moves freely and depending on pressure conditions will close against the upper or lower seat. This valve is not designed for use in operation with liquids having less than 1.0 specific gravity.


  • Bleeding of a tube line where an air pocket has formed. This application calls for installation at the top of the tube.
  • Bleeding of a tube on the suction side of a pump. The suction side is bled automatically, before the pump starts, establishing a vacuum. Binding of air to liquid will be prevented, and so will subsequent cavitation. In this application, the valve is mounted in front of the pump, on the top of the inlet tube.
  • No special tools required
  • Ball and gaskets are replaceable
  • Valve seals are for both pressure and vacuum
  • 180 ° Elbow is 3A Certified
  • The valve ball is constructed of FDA, 3A approved polypropylene.
  • 1/8" NPT tap
  • All product contact surfaces have a radius of 1/4" or better.
Available Options
  • PTFE valve ball is available
  • Other gasket materials are available
How It Works
  • Allows air to be removed from a line or container without the liquid flowing out. Its design does not allow air to enter the line or container, even if subjected to negative pressure. It is a double-seated valve with a freely moving polypropylene ball. The ball, which is lighter than water, closes against the upper or lower seat, depending on the pressure conditions.

Certifications, 180 ° Elbow ONLY

Dimensional Specifications