Pressure Balance Lubricated Plug Valve Fabricator in China: Inverted Pressure Balance Lubricated Plug Valve, 1/2-30 Inch, Class 150-2500 LB, API 599, API 6D. Main features: 1. Reasonable product structure, reliable sealing, excellent performance and beautiful appearance. 2. Invert pressure balance structure, the switch is light. 3. There is oil groove between the sealing surface of the valve body, which can be used to inject sealing grease into the valve seat at any time to increase the sealing performance. 4. The material and flange dimensions of the parts can be selected according to the actual working conditions and users' requirements, so as to meet various engineering needs. website: https://www.uvalve.cn/inverted-pressure-balance-lubricated-plug-valve.html