Pneumatic positioner for linear valves Model 9540L is a single acting, compact, force-balance positioner. This positioner is utilized to linearize the relationship between valve stem position and the system¡¯s control signal, and to precisely position the valve stem.
Model 9520L is a single acting, compact, force-balance positioner with an integral I/P transducer. Unit receives a 4-20mA analog input and outputs a pneumatic loading pressure.