Series ARV is a normally-open valve. Until your system is pressurized, the valve is simply open, and air is present. As pressure builds within the system, unwanted air is forced to the highest point in the system, i.e., the normally- open air release valve. When pressure within the system exceeds atmospheric pressure, air is expelled. As liquid rises, the poppet becomes buoyant and eventually closes. (Note, minimum specific gravity of liquid must be .9 or higher). It is possible that trace amounts of air will remain in the system, depending on the rapidity with which the valve closes. It is also likely that some trace amounts of process liquid will be emitted. At system pressure of 10 PSI (with EPDM elastomer), the poppet will seal bubble-tight against the orifice. When pressure and liquid level drop, the valve will automatically re-open. For spigot or other connection types, consult factory.
  • Safety: Allows safe expulsion of unwanted air in piping system.
  • Minimum Closing Pressure: Closes at 0 PSI, as long as liquid is present. Valve closes as liquidrises, after virtually all unwanted air is forced out. Seals bubble-tight at system pressures aslow as 10 psi (EPDM seals).
  • Superior Design: Poppet sealsmore reliable than ball design;does not deform under pressurelike a hollow ball.
Unit of Measure


N/A 1/2 inches

End Connections

N/A Socket

Body Material



N/A Viton

Dimension A

N/A 5.3 inches

Dimension A

N/A 130 mm

Dimension B

N/A 1.9 inches

Dimension B

N/A 48 mm

Dimension C

N/A 2.8 inches

Dimension C

N/A 72 mm