The Fisher type 3582 series pneumatic and type 3582i electro-pneumatic valve positioners are used with diaphragm-actuated sliding stem control valves. The 3582 receives a pneumatic input signal (3-15# or 6-30#) from a control device and sends that signal to the actuator, providing a valve stem position that is directly proportional to the pneumatic input signal. The 3582i electro-pneumatic valve positioner contains an electro-pneumatic converter that converts a dc current input signal to a proportional pneumatic output signal. Available for same day shipping!