Trunnion mounted ball valves are effective in both low and high pressure situations. In low or no-pressure situations the spring-loaded seats will create a seal, while also working for high pressure applications.

What is the use of trunnion?

A trunnion (from Old French "trognon", trunk) is a cylindrical protrusion used as a mounting or pivoting point. First associated with cannons, they are an important military development. Alternatively, a trunnion is a shaft that positions and supports a tilting plate.

How does a trunnion work?

How do Trunnion Mounted Ball Valves Work? Trunnion mounted ball valves are quarter-turn valves. This means you need to turn the actuator on a 90-degree angle to turn the valve on or off. Once the actuator is turned the ball rotates so that the bore faces the pipeline and medium can flow freely.