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Technical

Ready for Low-E Valve Technology?

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With an estimated 60% of fugitive emissions attributed to valves it is easy to see EPA’s attention is on valve emissions reduction. Traditionally valve stem leakage was a visible event. Improvements in packing materials and design lead to non-visibly leaking valves.

In today’s world, government regulations drive measurement of valve leakage to the molecular level in parts per million (ppm). These extremely low vaporous emissions required packing manufacturers to evaluate their product performance to the latest EPA standards for Low E Valve Packing Technology.

 


Ball Valve Coatings: Different Coats for Different Apps

coatings-ball-valveCoatings protect valves and actuators against wear, erosion, chemical attack and other forces that threaten their durability and effectiveness. But because they are faced with such a diversity of challenges, there are a broad number of differences in the types of coatings used. The coatings used for ball valves have their own set of characteristics that differ in many cases from other types of valves.

Networking Considerations for Electric Actuation

networkingWhen considering the electric actuation industry, several topics are subject to conversation and analysis, including non-intrusive electric actuators and their overall capabilities and construction. Alternative discussion revolves around the evaluation of diagnostics and maintenance information available through (or in support of) Computerized Maintenance Management Software (CMMS), Asset Management Systems (AMS), Field Device Tools (FDT), Device Type Managers (DTM), Electronic Device Description Language (EDDL), and many other acronyms that make up the “alphabet soup” of the industry. However, regardless of what’s under discussion, one fundamental topic must be addressed adequately before truly considering data evaluation and data management—this topic is data acquisition (networking).

 

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.

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