Last updateThu, 21 Jun 2018 5pm



Actuators Propel Wind Turbines

wind_turbinesWe in the valve industry tend to think of actuators as operating valves, but they’re used in other fields as well, including such alternate energy applications as wind turbines. These units are steadily increasing in size, with blades between 100 and 150 feet long that weigh between 7 and 14 tons, according to Dheeraj Choudhary, Business Unit Manager, Global Wind Energy, Parker Hannifin. Some of the newer units have blades more than 200 feet long and electrical outputs greater than 5 MW per turbine.

Electric Valve Actuators Set to Move into Control Applications

electric_power_plantElectric valve actuators have made great progress in the past few years, in both performance and acceptance. But until recently there was one area in which they were seldom used: modulating control, where air-powered, diaphragm-actuated units held the top position. But that is changing, as electric actuators seem to be poised to take over another area. We asked >Chris Warnett, sales and marketing director at Rotork Process Controls, what was going on.

An Upside to the Downturn?

cameraAny student of economics will tell you that “creative destruction” and “disruptive technologies” are essential elements of capitalism. An old business model dies and a new one takes its place, or a new technology comes along that fundamentally alters the direction of a field. Some companies survive (often after a near-death experience) while others don’t. A few examples:



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