Pneumatic Diaphragm Actuator

What is a ZHA/B Type Pneumatic Diaphragm Actuator?

ZHA/B type multi-spring pneumatic diaphragm actuator changes the output pressure of pneumatic adjustment gauge into push rod displacement change. It can connect a straight trip control valve to change the control system output signal into disk corresponding position to realize to control valve open degree. It has force uniform, good stability, large output push, small size, lightweight and other advantages.

ZHA/B Type Pneumatic Diaphragm Actuator

Action Type

ZHA type: direct action, pneumatic closer. When air pressure increase, the stem part would move down
ZHB type: re-action, When air pressure increase, stem part would more up

Performance and selected parameter

Effective area(cm)2003503505609601600
Air interface sizeM10×1M12×1.25M16×1.5
Air supply pressure0.14、0.25MPa
Working temperature-30~60ºC
Spring scope0.02~0.10、0.04~0.10、0.08~0.24MPa
HystersisWith positioner : 1%, without positioner : 3%
LinearityWith positioner : 1%  Without positioner : ±5%

Model Establishment

ZHAction typeSize specificationSpring scope (KPa)Handwheel structure
ZH series actuatorA: Direct action
Without : Without handwheel
D:top entry handwheel
C: Side entry handwheel

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