American Fisher pneumatic, single-acting positioner Pneumatic, single-acting positioner can be used with various actuators on straight-stroke valves for throttling applications. The rugged positioner provides valve positioning proportional to the pneumatic input signal received by the control device. Precise, efficient, and shock-resistant positioners are designed to provide a precise, fast-response instrument capable of withstanding the vibrations of most factory environments. Low steady-state air consumption improves efficiency. Variable Gain Gain and damping are easily adjustable to fine-tune positioner stability to specific application needs. The multifunction positioner accepts standard pneumatic input signals or standard mA DC input signals from control devices. This positioner provides split-range control and adjustable zero and span. Fewer spare parts are required and most spare parts of the positioner are interchangeable so only few spare parts need to be prepared. Structurally rugged housing and cover designed to withstand mechanical vibration and rough treatment. Positioner adjustment is simple. Zero and span adjustments can be made without removing the protective cover. The control valve diagnostic test function supports the detection of valves/actuators/positioners. The Valve Diagnostic System performs diagnostic testing of valves/actuators/positioners by installing connectors, pipes and other components between or between the positioner and actuator.
American Fisher 3660 pneumatic, single-acting positioner