In contrast of Linear Motion valve, Rotary Motion valves are more popular than before. They use a closure element that rotatesto block the flow. Butterfly, ball, plug, eccentric, and swing check valves, the valve-closure member travels along an angular or circular path. These types of valves are known as rotary motion valves as these valves rely on the rotary motion of the flow obstructer.

A rotary-motion valve usually weighs less and is smaller in size than a comparable linear valve. It is also easier to control emissions through the stem packing of a rotary valve without the use of bellows seals. They are less prone to clogging in dirty service applications as well.

Rotary Motion Valves

Rotary Motion Check-Valve

Rotary Motion Valve-Drawing