Valve Magazine - Summer 2010

1616 WHERE VALVES ARE USED: ON THE SEA AND UNDER THE GROUND Valve Magazine takes a look at the roles valves and actuators play in two unique industry segments—marine and mining. We outline what types of valves are used and what those valves are tasked with, then address the special conditions they must tackle.

BY GREG JOHNSON AND CRAIG BEKINS

FEATURES

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SEVERE SERVICE VALVES RESPOND TO NEW PRESSURES Valves are called upon to respond to increasingly difficult conditions as the systems they control and operate plunge deeper into the ocean and further into the arctic, desert and other remote areas with harsh environments. BY PETER CLEAVELAND

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VALVE ENGINEERING CHALLENGES FOR FLOW CONTROL OF RECLAIMED WATER The use of reclaimed water for irrigation and other purposes is growing in the U.S. We take a look at how valves are used in the process and where opportunities and challenges lie. BY ROLF S TRUTZENBERG

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THE TRUE MEANING OF DOUBLE BLOCK AND BLEED Rudy Garza of Exxon Mobil Upstream explains that while many think their block and bleed valves provide double isolation, they don’t—and that could be dangerous. BY PETER CLEAVELAND

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SPOTLIGHT ON

SUPPLIERS

Suppliers to valve and actuator manufacturers play a critical role in keeping our industry’s products operating efficiently and effectively. Here’s a preview of products from some of those suppliers as well as a list of VMA associate members and a special focus on flowmeters.

ON VALVEMAGAZINE.COM: WEB-ONLY CONTENT ; Rationalizing Valve Specifying Through Metadata ; Dealing with the Threat of Chinese Counterfeiting ; Past the Obstacles to Lean Manufacturing New articles posted and news items updated regularly—visit ValveMagazine.com often!

Valve MAGAZINE

Summer 2010 VOLUME 22, NO. 3

COLUMNS Perspectives 4 The Voice of Flow Control BY BILL SANDLER Actuators & Control 48 Rotary Electric Actuators BY PAUL SOUZA Industry Insights 50 Innovation Reigns in Marshalltown BY JUDY TIBBS Materials Q&A 52