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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 h...
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 f...
Advanced technology in pneumatic part-turn actuators
Günter Öxler (firstname.lastname@example.org) discusses advanced technology in pneumatic part-turn actuators....
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 en...
Advantages of variable speed actuators
Overview article authored by SIPOS Aktorik's Mrs Noelp and Mr Rebhan....
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 improv...
Corrosion protection for actuators
Reliable and safe field device operation is of crucial importance for perfect and economical service in process technology. The resistance of devices against most adverse environments is a decisive fa...
Digital communication goes underground
Tyco Flow Control's Nick Smith shows how mining sites can work more efficiently by installing underground computer systems....
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 fa...
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...
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 of...
IMTEX develops innovative PST solution
IMTEX Controls has developed an innovative solution for partial stroke testing of valves, says Engineering Manager Paul Turner....
Proper actuator sizing for rotary control valves, Part 1
In the sizing of rotary control valves, cost pressure leads to the actuators being sized with the lowest possible safety factors so that smaller actuator sizes can be used. The problem is that no appl...
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 valv...
Retrofitting a refinery
A previous Valve World report on AUMA’s success winning a contract to supply the BP Refinery in Rotterdam outlined the challenging requirements for electric actuation set by one of the world’s b...
Scotch Yoke or Rack-and-Pinion pneumatic part-turn actuator?
Technical article by Gunter Oxler....
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 installati...
Subsea valve actuation - reliability in depth
Valve World reviews actuator applications including emergency shutdown, subsea isolation and FPSOs....
Up close: developments in valve actuation
David Sear recently interviewed five staff at Rotork, who agreed to have their comments captured directly on film!...
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