High performance plug valveA new brochure, free upon request, describes the Durco Mach 1 high performance plug valve.The nonlubricated quarter-turn valves are available in ASME Class 150, 300, and 600 (derated) flanged ends.The valve lowers turning torques for reduced manual and automated actuation costs, the brochure says. Turning torques are unaffected by increases in line pressure, so turning torques are constant and predictable. The Durco Mach 1 is designed with an ISO mounting pad. The expanded temperature coverage ranges from -20° F. (-29° C.) to +525° F. (274° C.) with excursions to 550° F. (288° C.).The brochure notes that the valve's standard port seal...

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