Pilot Operated Pressure/Vacuum Relief Valve

The 9800 Series Pilot Operated Valve have two principal advantages over other types of relief valve：It is bubble tight to set pressure.And,the full flow folw is attained at no more than 10% over-pressure.These characteristics permit an operating pressure nearer to the maximum allowable woking pressure of the tank.High operationg pressures reduce evaporation and total ventiing volume,thereby reducing product loss and cost of processing emission.

Features

Designed and tested according to API2000；
Size 2” through 12”；
Available material option：aluminum，carbon steel，stainless steel and other material；
Full open at less than 10% overpressure；
Main valve remains tight at the set pressure;
Soft seats seal tight to conserve product and minimize valve wear which improves reliability;
The inlet and outlet flange are in according with ANSI B 16.5 150Lb RF（It can be designed according to users’ requirement）；