Spraywater control valves

November 2012 Valves, Actuators & Pump Control

PSV Mitech’s globe control valves for attemporator spraywater control have been operating successfully at a power station for over seven years with zero defects. The valve bodies were designed to ANSI 1500# with butt weld ends. The trims were a combination design with the ZZ trim at the bottom for the low-flow high-pressure drop startup condition, and a cavitation control trim at the top to handle the high-flow low-pressure drop running conditions. The tri-linear characteristic increased the operating range ability to over 100:1.

The valves were designed to operate with an electric actuator and they had a standard type bonnet with stainless steel Grafoil gaskets. The line size was 80 mm with an incoming pressure of 172 bar G. Maximum flow was 5 kg/s.

For more information contact Greg Walker, PSV Mitech, +27 (0)11 657 6000, [email protected], www.mitech.co.za

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