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From Emerson Process Management, Valve Automation
Products & Services
Electric valve actuators mount on valves which, in response to a signal, automatically move to a desired position using an outside power source. Single-phase or three-phase AC or DC motors drive a combination of gears to generate the desired torque level.
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Learn more about Electric Valve Actuators
Valve actuators mount on valves and, in response to a signal, move a valve to a desired position using an outside power source.
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Learn more about Valve Actuators
Valve positioners compare a control signal to a valve actuator’s position and move the actuator accordingly. They are used with both linear valves and rotary valves.
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Learn more about Valve Positioners
Electrohydraulic valve actuators and hydraulic valve actuators convert fluid pressure supply pressure into motion.
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Learn more about Electrohydraulic Valve Actuators and Hydraulic Valve Actuators
Valve position indicators are devices that show the position of the closure element.
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Learn more about Valve Position Indicators
Product Announcements
Topics of Interest
Overview
While the most often used actuators for pneumatic drives are cylinders for translational movements, there are many applications that require a turning or twisting movement of up to 360...
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Another common, inexpensive double-acting actuator is the vane actuator, which uses a pie-shaped pressure-retaining housing and a rectangular piston, called the vane, to seal between the two pressure...
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Piston cylinder actuators have some drawbacks. First, if the actuator remains in a static position for some time, some breakout force may be necessary to move the piston when a signal is eventually...
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Control valve pressure drops that are not engineered. If you consistently see 5 or 10 psi pressure drops or line size control valves, the process or instrument engineers are playing the lottery with...
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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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