The air fed into the diaphragm chamber is the control signal from the pneumatic controller. The most widely used signal…
The operation of a control valve involves positioning its movable part (the plug, ball or vane) relative to the stationary…
A solenoid valve is an electro-mechanical device in which the solenoid uses an electric current to generate a magnetic field…
Valve fail mode may be shown in instrument diagrams by either an arrow pointing in the direction of failure (assuming…
What is the Trim? The internal parts of the valve body, stem, seating material, package, disc, plug, back rings, etc.,…
Control valves are available in different types and shapes. They can be classified in different ways; based on: (a) action,…
There are two primary system considerations centering around an emergency operational situation for control valves. Control Valve Fail Safe Action…
Separator vessels, storage tanks, heat exchangers, columns and certain piping segments etc. are designed to handle certain operating pressure. However…
There are basically two types of actuators : single action and double action. Single action is a control valve that…
Each valve has a flow characteristic, which describes the relationship between the flow rate and valve travel. As a valve…
