vapor recovery valve 

installed on the top of manlid,control to open by the gas.To avoid the leakage .When oil tanker unloading oil,

the vapor recovery joint and valve can connect and open the lift valve. When stop unloading,the lift valve will automatically close, to prevent any pollutant into the valve.

Material:

Body:AL alloy

Shaft:SS

Seal:VITON

Specification : 4 " DN100 ,automatically open the 1/4" vent at the 600KPA vacuum.

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