New severe service choke valve Click here to enlarge imageA new severe service choke valve for oil and gas production uses a combination of DRAG velocity control technology and advanced materials to promise long trim life and precise process control.Its design suits it for use in separator level control. Normally this valve application, the company says, suffers from sand erosion and cavitation, but the choke valve trim is made from solid tungsten carbide and is multistaged so that cavitation is prevented.The fluid velocities within the trim of the choke are typically one-third to one-fourth that of conventional single stage chokes, the company notes. Velocity control protects the trim f...

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