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Home> pneumatic valve >> ZJHP(small)pneumatic diaphragm single-seat control valve
  • Product number:MC-000000004307
  • Product name:pneumatic diaphragm single-seat control valve
  • Product Type:ZJHP(small)
  • Product nameplate:SAIC
  • Project Category:pneumatic valve >>
  • Manufacturer:Shanghai Automation Instrumentation Co., Ltd.
  • Sales unit: Shanghai Automation Instrumentation Marketing Center
  • Information download:Click to enter the download page  
  • Introduction
  • Specifications
It is a new adjusting valve according to IEC standard, suitable for all kinds of media and processing conditions. Reliable action and precise flow adjustment, wide adjusting range, stable operation, small leakage. Widely used in all industrial departments for high quality controlling
Structure principle
Small pneumatic single-seat valve made up of ZHA（B）pneumatic multi-spring diaphragm actuator and VJP low resistance single-seat valve
After pneumatic signal pressure from regulation instrument input into the film room of pneumatic diaphragm actuator, drive thrust stem to move valve spool, change the opening cross-sectional area, to regulate the flow of media. The travel of valve spool and input signal pressure, form corresponding proportional
Nominal diameter DN（mm）
20
25
40
50
65
80
100
150
200
10
12
15
20
32
40
125
150
Rated flow coefficient KV
Straight line
1.8
2.8
4.4
6.9
11
17.6
27.5
44
69
110
176
275
400
690
Equal percentage
1.6
2.5
4
6.3
10
16
25
40
63
100
160
250
360
630
Rated flow characteristics
Straight line；equal percentage
Inherent flow ratio
50：1
Nominal pressure DN（MPａ）
0.6；1.6；4.0；6.4
Working temperature ℃
－20～200；－40～250；－40～450；－60～450
Environment temperature ℃
－40～85
Pressure of air supply（MPａ）
0.14；0.25；0.4
Actuator model
ZH(A/B)-22
ZH(A/B)-23
ZH(A/B)-34
ZH(A/B)-45
Spring range
KPａ
Air off
20～100；20～100；40～200
Air on
20～100；40～200；80～240
Allowed pressure difference MPａ
Air off
20～100
0.14
6.4
6.19
3.96
2.23
1.43
0.87
0.56
0.35
0.34
0.22
0.14
0.15
0.10
0.06
20～100
0.25
6.4
6.4
6.4
6.4
6.4
5.68
3.64
2.30
2.21
1.43
0.91
0.95
0.66
0.37
40～200
0.4
6.4
6.4
6.4
6.4
6.4
6.4
5.04
3.18
3.06
1.98
1.26
1.32
0.92
0.52
Air on
20～100
0.14
4.64
3.09
1.98
1.11
0.71
0.44
0.28
0.18
0.17
0.11
0.07
0.07
0.05
0.03
40～200
0.25
6.4
6.4
5.94
3.34
2.14
1.31
0.84
0.53
0.51
0.33
0.21
0.22
0.15
0.09
80～240
0.4
6.4
6.4
6.4
6.4
4.99
3.05
1.95
1.25
1.18
0.78
0.5
0.51
0.36
0.21
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