A different strategy for controlling the flow of fluid is to insert a rotary element into the flow path. Instead of sliding a stem into and out of the valve body to actuate a throttling mechanism, rotary valves rely on the rotation of a shaft to actuate the trim.
An important advantage of rotary control valves over sliding-stem designs such as the globe valve and diaphragm valve is a virtually obstruction-less path for fluid when the valve is wide-open.
Rotary Stem Valves
Of course, gate valves also offer obstruction-less flow when wide-open, but their poor throttling characteristics give most rotary valve designs the overall advantage.
- How Sliding Stem Valves Work ?
- What is Port-guided Globe Valve ?
- Short Notes on Different Valve Types
- Globe Valve Body Design
- Direct Acting Control Valves & Reverse Acting Control Valves
- Classification of Control Valves
- Globe Valve Seat and Disk
- What is Double-ported Globe Valve ?
- Difference between Globe Valve and Gate Valve ?
- Butterfly Valves Construction, Types, Stem & Bonnet Assembly