The HPP-5 Series Pneumatic Valve Positioner provides accurate valve positioning when utilized with a double-acting piston actuated control valve.  The HPP-5 accepts a pneumatic instrument signal and positions the double-acting actuator proportionally. The HPP-5 may be utilized for most valve positioning applications. HPP-5s are available in both reverse-acting and direct-acting configurations with a variety of different input signal ranges. Due to its low-bleed characteristics, the HPP-5 is typically utilized when bleed gas must be discharged to atmosphere.