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Other Topics You Might Be Interested In
When the first edition of Valve Handbook was published by McGraw-Hill in 1998, the valve industry was in the midst of an evolutionary era, which was driven by significant advances in digital...
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5.1.3 Definition of Actuators and Actuation Systems
Automatic control of valves requires an actuator, which is defined as any device mounted on a valve that, in response to a signal, automatically...
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5.2.2 Manual Operator Design
Generally, manual operators are divided into two categories: linear motion and rotary motion. Linear-motion manual handwheels use a threaded connection between a...
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5.3.2 Pneumatic Actuator Design
The most commonly applied pneumatic actuator over the past 40 years has been the diaphragm actuator (Fig. 5.8). Most diaphragm actuators are designed for linear motion,...
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5.4.1 Electric Actuators
Electric motors installed on process valves were one of the first types of actuators used in the process industry. Such electric actuators have been used since the 1920s,...
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