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Valve Packing

Textbook

Regardless of valve type, all stem-actuated control valves require…

Actuator Bench-set

Textbook

Valve actuators provide force to move control valve trim. For precise…

Level Sensor Accessories

Textbook

Disturbances in the liquid tend to complicate liquid level…

Pipe and Pipe Fittings

Textbook

Pipe is a hollow structure designed to provide an enclosed pathway for…

Laser Spectroscopy

Textbook

A laser is a light source emitting waves of light that not only…

Valve Seat Leakage

Textbook

In some process applications, it is important that the control valve…

Transfer Function Analysis

Textbook

An extremely important topic in engineering is that of transfer…

Proximity Switches

Textbook

A proximity switch is one detecting the proximity (closeness) of some…

Polyphase AC Power

Textbook

“Polyphase” means “many phases,” describing a…

Material Volume Measurement

Textbook

A variety of technologies exist to measure the quantity of stored…

Basics of Bridge Circuits

Textbook

A bridge circuit is basically a pair of voltage dividers where the…

The Concept of Differentiation

Textbook

Suppose we wished to measure the rate of propane gas flow through a…

Function Block Diagram (FBD) Programming

Textbook

(Will be addressed in future versions of this book)

Laminar Flowmeters

Textbook

A unique form of differential pressure-based flow measurement deserves…

Pilot Valves and Pneumatic Amplifying Relays

Textbook

Self-balancing mechanisms consisting solely of a baffle/nozzle…

Control Valve Actuators

Textbook

The purpose of a control valve actuator is to provide the motive force…

Relating 4 to 20 mA Signals to Instrument Variables

Textbook

A 4 to 20 mA current signal represents some signal along a 0 to 100…

Molecular Quantities

Textbook

Sample sizes of chemical substances are often measured in moles. One…

Flow Switches

Textbook

A flow switch is one detecting the flow of some fluid through a pipe.…

Auxiliary and Lockout (86) Relays

Textbook

An important type of “accessory” relay, especially for…