ZHA/B multi-spring pneumatic membrane actuator is improved according to old ZHA/B single-spring pneumatic membrane actuator with large size、heavy weight and some unreliable problems. Complex structure of diaphragm, using special suppressed technology, multi-spring type improve the manufacturing process of spring , can group with different range of springs .With high fastness and corrosion resistance, good stability, small size, light weight and so on.

Can be used with pneumatic、electric一pneumatic positioner and air filter and other accessories. Also can be used with ZPXS、ZDXS type light side-mounted、top-mounted manual actuator.

Action type:

ZHA type: positive action, when pressure signal increase, valve stem moves down

ZHB type: negative action, when pressure signal increase, valve stem moves up.