Inst Tools - Instrumentation, Electrical, PLC Tutorials

Working Principle of Pneumatic Actuators

Pneumatic actuators use instrument air pressure to apply force on the diaphragm to move the valve actuator and then to

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

Every flow-measuring devices exploits a physical principle to measure the flow rate of fluid stream. Discuss Different Flow Measurement Technologies.

A classic example of an insertion flow meter element is the Annubar, a form of averaging pitot tube. Learn the types and principles.