WDAOV

Automatic unloading overflow valve is independent secondary forward throttle valve. The design for preventing gravity oil transmission in underground storage tanks (UST) unloading oil overflow.When unloading oil in the process of underground oil tank liquid level reaches about 92% of the storage capacity and oil storage tanks will be the valve first level low float upward. So the main poppet valve unloading overflow valve to start working, the unloading flow decreased to about 10% of the normal amount of oil.The main lift valve closed flow caused by the sudden drop "line shock" of oil discharge pipe, and the tank is close to 95% capacity of the notice to the unloading valve driver. The oil unloading driver then stops discharging the oil to the storage tank, and the oil in the unloading oil pipe is broken off and discharged. Close unloading second high float tank capacity will reach 95% in the oil level.

Advantage

■Spring loaded two stop damper can reduce the pipeline impact.

■Vertical floating body design, even when the tank is full, you can also remove the valve.

■Check test port.

■Pipe bottom with screwthread.

Installation

■Design for the application of underground storage tanks. Only for gravity unloading. Don't try this product for the ground tank,otherwise the valve will not work and lead to a very dangerous situation.