See all products of Cast iron pressure independent control valves (PICV) Pressure independent control valve. Flat seat union with gasket for cast iron 145 series. Pressure independent control valve. Rotational proportional actuator for pressure independent control valve 146 series. Rotational proportional actuator for pressure independent control valve 145 series. Manual actuator for 145895 and 145905 valves. Manual actuator for 146 series regulating valve.