valve actuator 1.Dual piston Rack and pinion design 2.Double acting and spring ... NAMUR is convenient for mounting accessories such as Limit Switch box, positioner and so on.2,Pinion The pinion ... colours, PTFE or Nickel plated.5,Pistons The twin rack pistons are made form Die-casting aluminum treated with ... high and low temperature applications Viton or Silicone. rack pinion pneumatic valve actuator