VALSTEAM ADCA PP981 PNEUMATIC POSITIONER POSITIONERS & CONVERTORS

The ADCATROL PP 981 positioner requires an input signal of 0,2÷1bar (3÷15psi) for the proportional control actuator. The positioner compares the output signal from a controller with the position feedback and varies a pneumatic output signal to the actuator accordingly. The actuator position is therefore guaranteed for any controller output signal and the effects of varying differential pressure.