ZSA/B-P is pneumatic piston right travel actuator with spring return and adjustable to zero proportional. Large output force, simple structure、reliable、light、quick movement、good anti-vibration. Can used with right single/double-seat、angle-type、sleeve、film、seminiferous right travel adjusting valve and positioner as pneumatic piston adjusting valve.

ZS is the piston actuator with two-bit and spring return, used with cut-off valve. With the features of quick movement（up to 1.2-4.5S）、reliable、small size and light weight

ZSN is the two-way and no spring piston actuator , usually used with cut—off valve that has features of high differential pressure、large diameter、high requirement of on-off speed and high temperature.

ZS-P、ZS can be used with ZPXS side-mounted manual operator body

ZSN top-mounted manual operator body ZDS