HVV vent valves Stainless steel 3/8” and M22.

HVV
The BDV, AFZ and HVV vent valves are designed to drain (blowdown) or vent (depressurize) pipework, steam traps, valves and others.

HVV – Hand vent valves – Venting of float traps and generally to be used as a vent or depressurization valve.