Control Valve

ZHA/B Type Pneumatic Diaphragm Actuator

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Pneumatic Diaphragm Actuator

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Category : Control Valve. Tags : control valve, 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.

Pneumatic Diaphragm Actuator 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 more up

Performance and selected parameter

Type ZHA/B-11 ZHA/B-22 ZHA/B-23 ZHA/B-34 ZHA/B-45 ZHA/B-56
Travel(mm) 10 10、16 16、25 40 40、60 100
Effective area(cm) 200 350 350 560 960 1600
Air interface size M10×1 M12×1.25 M16×1.5
Air supply pressure 0.14、0.25MPa
Working temperature -30~60ºC
Spring scope 0.02~0.10、0.04~0.10、0.08~0.24MPa
Hystersis With positioner : 1%, without positioner : 3%
Linearity With positioner : 1%  Without positioner : ±5%

Model Establishment

ZH Action type Size specification Spring scope (KPa) Handwheel structure
ZH series actuator A: Direct action
B:Re-action
11
22
23
34
45
56
20-100
40-200
80-240
Without : Without handwheel
D:top entry handwheel
C: Side entry handwheel

Dimension and weight

Model Size ZH-22 ZH-23 ZH-34 ZH-45 ZH-56
A 285 288 365 475 585
H 300 323 417 520 720
H1 90 90 130 135 170
h1 40 41 41 54 61
t 18 18 23 26 34
C 95 100 130 150 180
H3(MAX) 179 179 230 315 400
F 200 200 240 350 449
H2 106 115 170 195 270
h2 40 40 50 55 65
N-d1 2-d10 2-d10 4-d12 4-d14 4-d18
d2 60 60 80 95 100
D 80 80 105 118 130
Weight (kg) 12 16 22 52 125
Control valve diameter Stem screw
3/4” M8
20,25,32,40,50 M8
65,80,100 M12×1.25
125,150,200 M16×1.5
250,300 M20×1.5
Pneumatic Diaphragm Actuator Dimension