Tag Archive: actuator

Aug
31

Process Control Using Wireless Sensors and Actuators

Conference

Over the last 10 years I have worked with a number of technologists from the process industry on various aspects of control using wireless field devices. Much of this work is summarized in the book Wireless Control Foundation – Continuous and Discrete Control for the Process Industry. Recently Mark Nixon (Emerson) and Willy Wojsznis (Emerson), …

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Oct
14

Control Using Wireless Measurements

Control Using Wireless Measurements

During the initial development of WirelessHart we began researching how to address control applications that use a wireless measurement and/or wireless actuator. To extend battery life a wireless transmitter may be setup to communication the measurement value much slower than the update rate of a wired installation. Also, when the transmitter supports Window communications (as …

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Mar
11

Evaluating Valve/Actuator Performance

Impact of Sticky Valve on Control

When a control loop is placed in automatic control, it is easy to detect if a valve or actuator is not responding correctly to the control system. As discussed in Chapter 3 of Advanced Control Foundation – Tools, Techniques and Application, this can be done by observing the response of the controlled parameter to control …

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Nov
07

Interfacing to Motorized Actuator

Interfacing to Motorized Actuators

At Emerson Exchange, 2011, I had the pleasure of working with Tom Pesek, Marketing Manager, Emerson Process Management to host a workshop on Interfacing the DeltaV control system to motorized actuators. The workshop addresses the use of motorize actuators for valves and dampers. These types of actuators may be preferred for some process control applications. …

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Oct
17

Emerson Exchange – 2011

Emerson Exchange

This year Emerson Exchange will be held October 24-28 at the Gaylord Opryland Resort & Convention Center in Nashville, Tennessee. Emerson Exchange is a forum for the free exchange of non-proprietary information among the global user community of all Emerson Process Management’s products and services. The technical sessions in this conference cover a wide range of industry …

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Jul
25

Commissioning Control Systems – Valve Performance

Impact of Sticky Valve on Automatic Control

As addressed in my July 18th blog, when a valve positioner is installed on a valve actuator, as long as it is functioning properly it will automatically increase the actuator pressure until the valve moves to a position that matches that requested by the control system. Feedback of the stem position is used by the …

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Jun
27

Increase-Decrease Control

Increase Decreas Interface for Motorized Actuator

Motorized actuators may be used for applications that require larger valves, such as those used for the regulation of wastewater flow. Also, a motorized actuator may be preferred in some applications, such as the basis weight control of a paper machine, that require precise positioning of the valve. In such an application, these actuators typically …

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