Control Valve Study Material - Instrumentation Tools

Working Principle of Hydraulic Actuators

Hydraulic actuators use liquid pressure rather than instrument air pressure to apply force on the diaphragm to move the valve

Although not a type of actuator itself, a form of actuation worthy of mention is where the process fluid pressure

In the Ball Valve design, a spherical ball with a passageway cut through the center rotates to allow fluid more

Globe valves restrict the flow of fluid by altering the distance between a movable plug and a stationary seat (in

Gate valves work by inserting a dam (“gate”) into the path of the ﬂow to restrict it, in a manner

Diaphragm valves use a flexible sheet pressed close to the edge of a solid dam to narrow the flow path

A sliding-stem valve body is one where the moving parts slide with a linear motion. Some examples of sliding-stem valve

Very basic does not imply obvious…i really like this statement. Very often the answer is very fundamental and basic to

The following collection of photographs chronicles the complete disassembly of a Fisher E-body globe valve with pneumatic diaphragm actuator. This

An ON/OFF Valve is the fluid equivalent of an electrical switch, a device that either allows unimpeded flow or acts