Control Valve Study Material - Instrumentation Tools

Types of Valve Actuators

Valve actuators are devices used to position valves. They can be used to fully open and shut a valve, or

In essence a valve simply functions as a restriction in a flow line, with flow areas A1 and A2 and pressure

The essential function of a valve is to start, throttle and stop a fluid flow. Throttling, as shown in Below Figure,

In all of our activities, safety is one of the prime points under consideration. The same is true when we

The electric actuator uses an electric motor to provide torque to operate a valve. They are quiet, non-toxic and energy

A valve actuator is the mechanism for opening and closing a valve. Manually operated valves require someone in attendance to

Another style of globe valve body is the three-way body, sometimes called a mixing or a diverting valve. This valve

A more modern version of the globe valve design uses a piston-shaped plug inside a surrounding cage with ports cast

Some globe valves use a pair of plugs (on the same stem) and a matching pair of seats to throttle

Another variation on the globe valve design is the port-guided globe valve, where the plug has an unusual shape, projecting