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ZHA Pneumatic actuator

Parameters of ZHA Pneumatic actuator

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

ZHA Pneumatic actuator

Description

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

◆ Action type

ZHA type: direct action, pneumatic close. When air pressure increase, stem part would move down

ZHB type: re-action, When air pressure incease, stem part would move up

Reverse ActingReverse Acting

 

  1. Up diaphragm castings               2. Diaphragm
  2. Diaphragm plate                         4. Spring
  3. Down diaphragm castings           6. Actuator stem
  4. Yoke                                             8. Adjust nut

9.Travel indicator

  • Model Establishment

 

 

ZH

 

Action type

 

Size specification

Spring scope ( KPa)  

Handwheel structure

11  

 

20-100

40-200

80-240

Without : Without handwheel

D:top entry handwheel C: Side entry

handwheel

22
ZH series A: Direct action 23
actuator B:Re-action 34
45
56

 

 

Additional information

Air supply pressure

0.14, 0.25, 0.4 MPa

Working temperature

-30~60ºC

Spring scope

0.02~0.10,0.04~0.20,0.08~0.24MPa

Backlash

With positioner : 1%, without positioner : 3%

Linearity

With positioner : 1%, Without positioner : ±5%

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