Regardless of valve type, all stem-actuated control valves require…
Valve actuators provide force to move control valve trim. For precise…
Disturbances in the liquid tend to complicate liquid level…
Pipe is a hollow structure designed to provide an enclosed pathway for…
A laser is a light source emitting waves of light that not only…
In some process applications, it is important that the control valve…
An extremely important topic in engineering is that of transfer…
A proximity switch is one detecting the proximity (closeness) of some…
“Polyphase” means “many phases,” describing a…
A variety of technologies exist to measure the quantity of stored…
A bridge circuit is basically a pair of voltage dividers where the…
Suppose we wished to measure the rate of propane gas flow through a…
(Will be addressed in future versions of this book)
A unique form of differential pressure-based flow measurement deserves…
Self-balancing mechanisms consisting solely of a baffle/nozzle…
The purpose of a control valve actuator is to provide the motive force…
A 4 to 20 mA current signal represents some signal along a 0 to 100…
Sample sizes of chemical substances are often measured in moles. One…
A flow switch is one detecting the flow of some fluid through a pipe.…
An important type of “accessory” relay, especially for…