A pneumatic proportional pressure control valve can not only control pressure, but it can also control other process variables, such as flow, force, rotational speed, position, temperature or level.

The valves are termed proportional because output flow is not exactly linear in relation to input current. Despite their nonlinear response, the valves are an inexpensive way to control position ...

A proportional solenoid valve is an electromagnetic valve designed to respond to a variable power input to regulate the flow of liquid and/or gas proportionately. It is used to control the flow rate ...

The ideal expectation is that the flow through the control valve is proportional to the controller output signal such that the loop feedback “gain” remains nearly constant for all process flow ...

“The Parker LM-Pro miniature proportional valve utilizes a patent pending linear motor actuation technology to enable flow up to 540 slpm in a very compact and energy efficient package, while ...