Sleeved and lined plug valves are non-lubricated for a few applications they operate virtually maintenance free for several years.
These valves are used for On/Off and Controlling service in demanding process applications with media temperatures ranging from -30°C to 260°C. Standard sizes from 1/2" to 24", ANSI classes 150,300 & 600. Body & plug materials range from carbon steel and stainless steel to the most exotic alloys.
The face to face can be ANSI or DIN.