The Gate Valve seats have a front sealing area with 1 or 2 inserts of different materials. The seats can also be metal-to-metal with Stellite or TCC coating. To facilitate assembly and on-line maintenance, the design usually includes “wings”. Sizes range from 1/2” to 72” and materials can vary from carbon steel to nickel alloys.
The Gate Valves are used in pipelines for crude oil or gas in plants.