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Compact pneumatic single seat regulating valve
ZJHP precision small pneumatic single seat regulating valve
Product details
The ZJHP precision small pneumatic thin film single seat regulating valve consists of a pneumatic thin film multi spring actuator and a precision small single seat valve. The multi spring actuator has low height, light weight, simple equipment, compact valve body structure, smooth flow channel, and a large flow coefficient.
Suitable for situations with strict requirements for leakage, low pressure difference before and after valves, and media with certain viscosity and low fiber content.
Technical parameters and performance
■ Valve body
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type |
Straight through single seat cast ball valve | ||||
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Nominal Diameter |
20. 25, 32, 40, 50, 65, 80, 100, 125, 150, 200mm | ||||
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nominal pressure |
PN1.6、4.0、6.4MPa | ||||
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Flange standard |
JB/T79.1-94、 79.2-94, etc | ||||
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material |
Cast steel (ZG230-450), cast stainless steel (ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti), etc | ||||
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Bonnet |
Standard Type -17~+230 ℃, Heat Dissipation Type+230~+450 ℃, Low Temperature Type -60~-196 ℃, Bellows Sealed Type -40~+350 ℃ | ||||
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Cover type |
Bolt compression type | ||||
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filler |
V-shaped PTFE packing, PTFE impregnated asbestos packing, asbestos textile packing, graphite packing | ||||
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structural style |
(See Figures 1-5 for details) | ||||
■ Valve components
| SPOOL TYPE | Single seat plunger type valve core | ||||
| Traffic characteristics | Equal percentage characteristic and linear characteristic | ||||
| material | Stainless steel (1Cr18Ni9Ti, 1Cr18Ni12Mo2Ti, 17-4PH, 9Cr18, 316L), stainless steel overlay with Stellite alloy, titanium, and corrosion-resistant alloys. | ||||
■ Executing Agency
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type |
ZHA/B multi spring membrane actuator | ||||
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model |
ZHA/B-22 | ZHA/B-23 | ZHAB-34 | ZHA/B-45 | ZHA/B-56 |
|
Effective area cm2 |
350 | 350 | 560 | 900 | 1400 |
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Travel distance mm |
10. 16 | 25 | 40 | 40, 60 | 100 |
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Spring range Kpa |
20-100 (standard), 20-60, 60-100, 40-200, 80-240 | ||||
|
Membrane material |
Nitrile rubber with nylon cloth, ethylene propylene rubber with nylon cloth | ||||
|
air supply pressure |
140～400KPa | ||||
|
air connection |
RC1/4" | ||||
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ambient temperature |
-30～+70℃ | ||||
■ Valve action type
Gas closed type (B) - valve position open when gas is lost (FO); Pneumatic opening (K) - valve position closed in case of gas loss (FC)
■ Attachment
Positioner, air filter pressure reducer, holding valve, travel switch, valve position transmitter, handwheel mechanism, etc
■ Performance
|
project |
Without locator |
Equipped with locator |
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Basic error% |
±5.0 |
±1.0 |
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Return difference% |
≤3.0 |
≤1.0 |
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Dead zone% |
≤3.0 |
≤0.4 |
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Constant point deviation% |
air to open |
Starting point |
±2.5 |
±1.0 |
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|
End |
±5.0 |
±1.0 |
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air to close |
Starting point |
±5.0 |
±1.0 |
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End |
±2.5 |
±1.0 |
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Rated travel deviation% |
≤2.5 |
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Leakage rate l/h |
0.01% x valve rated capacity |
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Adjustable range R |
30:01 |
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Rated flow coefficient Kv, rated stroke, equipped actuator model, allowable pressure difference
|
Nominal diameter DN (mm)
|
20
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
125
|
150
|
200
|
||||
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Valve seat diameter dN (mm)
|
10
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12
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15
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20
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25
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32
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40
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50
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65
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80
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100
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125
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150
|
200
|
|
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Rated flow coefficient Kv
|
straight line
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1.8
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2.8
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4.4
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6.9
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11
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17.6
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27.5
|
44
|
69
|
110
|
176
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275
|
440
|
690
|
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Rated travel L (mm)
|
Equal percentage
|
1.6
|
2.5
|
4
|
6.3
|
10
|
16
|
25
|
40
|
63
|
100
|
160
|
250
|
400
|
630
|
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Rated stroke (mm)
|
10
|
16
|
25
|
40
|
60
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Model of actuator
|
ZHA/B-22
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ZHA/B-23
|
ZHA/B-34
|
ZHA/B-45
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