Lift Plug Valve

A lift plug valve (commonly referred to as a non-lubricated lift-type plug valve) is a heavy-duty rotary isolation valve engineered with a mechanical lifting mechanism that physically raises the tapered plug off its seat before rotating it 90 degrees to open or close. This complete seat separation during rotation eliminates mechanical friction, seat scraping, and operating wear, enabling smooth, low-torque actuation even in high-temperature or fouling process services. Conforming to standards like API 599, API 6D, and ASME B16.34, these friction-free valves are critical specifications in high-temperature refinery coking units, catalytic cracking systems, and severe-service chemical bypasses, allowing refinery engineers to guarantee positive, long-term line isolation by importing certified lift plug valves directly from premier manufacturers in China via our advanced B2B commercial platform.