In floating ball valve, the ball is held in the position by the compression of the two elastomeric seats against the ball. Trunnion mounted ball valve is a solution to the problem of excessive torque required by floating ball valve in high-pressure service.
Ball Valve is a form of quarter-turn valve which uses a hollow, perforated and pivoting ball to control flow through it.Stainless steel ball valve is open when the ball’s hole is in line with the flow and closed when it is pivoted 90 degrees by the valve handle.
Gate valves are characterized as having either a rising or a non-rising stem. Rising stems provide a visual indication of valve position because the stem is attached to the gate such that the gate and stem rise and lower together as the valve is operated.