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Actuators
Technical article
A descriptive definition of valve actuators
Chris Warnett reviews the types of actuators used in the flow control industry. He also shows how the advent of micro-circuitry has resulted in actuators becoming more sophisticated, checking on the health and well being of a valve as well as providing predictive maintenance data....
Written paper
Actuation: a growing market
Industry veteran Mr Earnie Carey (Marketing and Product Manager at Flowserve Limitorque) spoke to Valve World's Gillian Gersley about his thoughts on the actuation industry and expectations for future trends....
Technical article
Advanced technology in pneumatic part-turn actuators
Writing for Valve World, Günter Öxler brings his personal views on technical developments and achievements in the flow control industry. In this article he discusses advanced technology in pneumatic part-turn actuators for process valve actuation. NOTE: Mr Oxler can now be reached on: guenteroexler@aol.com...
Technical article
Advantages of low-pressure Jet Engine Actuators
In the past decade a new type of actuator has been developed, using the principle of the reactive gas turbine – a jet engine - as the driving force. This article discusses the advantages of the jet engine actuator (supplied by low pressure compressed air at 0.4MPa) compared to the piston pneumatic-hydraulic actuator....
Technical article
Control valve actuators: their impact on control and variability
Chris Warnett discusses important issues during actuator selection for control valves such as resolution, repeatability and precision, and explains how a new electric actuator can significantly improve on traditional performance. ...
Technical article
Electric actuators for control valves
In this technical paper, Rotork discusses its new electric actuator for the operation of process control valves. The CVA range provides continuous, repeatable modulating control with a programmable fail to position option. It can operate on an industry-standard 4-20mA control signal or digital bus...
Technical article
Electric valve actuators in the modern power industry
In recent years electric valve actuators have grown in importance in modern power plants, contributing to efficiency, economy and safety as well as facilitating the quick start-ups demanded by today’s working practices and the emission reductions dictated by environmental legislation. Electric actuators may be required for an extensive range of duties encompassing isolation, regulation, modulation and failsafe operation of valves and dampers. This article looks at the selection and specification...
Technical article
Electro-hydraulic actuators with operating comfort
Electric actuators are compact, simple to use and offer numerous monitoring features. However electric actuators do not have quick operating option or stored energy. In this article, Henoch Hoster offers a solution: a Schuck electronic control system plus the SST electro-hydraulic actuator....
Technical article
Recent developments in process valve diagnostics
Most process valve manufacturers market 'smart' or 'intelligent' valves – typically a digital positioner plus a control valve. While this technology has been available for a long time for control valves, the situation in automated on/off valve development is totally different, argue Metso Automation Managers....
Technical article
Scotch Yoke or Rack-and-Pinion pneumatic part-turn actuator?
Further to previous discussions regarding pneumatic part-turn actuators, Gunter Oxler takes the opportunity to report on the best choice between the different technical solutions offered by pneumatic part-turn actuators. NOTE: Mr Oxler can now be reached on guenteroexler@aol.com...
Technical article
Shipping and storing butterfly valves with actuators
By popular demand, Günter Öxler returns to the topic of storage and shipping of valves. He discussed simple and cost-effective solutions to eliminate trouble and work on the job-site during installation, commissioning and start-up procedures. NOTE: Mr Oxler can now be reached on guenteroexler@aol.com...
 
RotorkProcess Resources Inc-Kace Ball ValvesMetso AutomationWeirTyco/Flow control
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