- The Valtek Mark One globe control valve offers superior performance in liquid and gaseous services, while also permitting easy, fast and inexpensive maintenance.- The spring-cylinder actuated Mark One valve provides stiffness and maintains high positioning accuracy, repeatability, controlled high speed, and faithful response. The Mark One valve handles up to 150 psig (10.3 barg) supply air and has the thrust to shut off against much higher fluid pressures.- The Mark One valve is designed so the spring, supply air pres sure and fluid pressure itself combine to produce exceptionally tight shutoff. A self-aligning seatring further enhances the shutoff capability of the Mark One valve.
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