Air Pressure Release Valves
The APCO #50 Air Vent Valve shall operate (open) under pressure and allow entrapped air to escape from a pipeline, pump, tank or hot water system. After air escapes out of the APCO #50 Air Vent Valve orifice, the orifice shall close by means of a simple lever mechanism to prevent water from escaping. The orifice will then stay closed until more air accumulates inside and the opening cycle will repeat automatically.
The needle shall be Buna-N, accurately guided to the seat orifice by means of a stainless steel lever and needle arm for drop tight shut-off. The seat shall be stainless steel with a 3/32" orifice to operate (open) up to 175 psi or 1/16" orifice for 300 psi. The APCO #50 Air Vent Valve shall have a stainless steel float designed to withstand a shock pressure of 1000 psi or more. The APCO #50 Air Vent Valve body shall have a 1/2" NPT female threaded inlet and outlet and be rated for 350 psi test pressure.
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