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ZJHPW bellows sealed pneumatic single seat regulating valve
Caliber range: DN20-200mm Pressure range: PN1.0-6.4MPa Applicable temperature: -250-560 ℃ Product application: The ZJHPW bellows sealed pneumatic sing
Product details
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ZJHPW bellows sealed pneumatic single seat regulating valve
1、 Product Details
Product model: ZJHPW
Product Name: Bellows Sealed Pneumatic Single Seat Regulating Valve
The ZJHPW bellows sealed single seat regulating valve is a top guided structure regulating valve with a compact valve body structure, S-shaped fluid channel, low pressure drop loss, high flow rate, and wide adjustable range.
The upper valve cover adopts a corrugated pipe sealing structure, which can completely eliminate the possibility of process medium leaking out from the clearance of the valve stem movement, which is one of the significant features of the corrugated pipe sealing valve. Due to the deformability and outstanding aging resistance of the bellows element, this type of regulating valve completely overcomes the weaknesses of packing aging and temperature difference sensitivity that usually exist in packing seal valves. Secondly, adopting a dual sealing structure of corrugated tube and packing ensures better safety and reliability.
Therefore, it has been widely used in automatic control systems for rare and special media such as highly toxic, highly corrosive, and radioactive substances. The valve core has a large guiding area and good vibration resistance. It is equipped with a multi spring thin film actuator, which has a compact structure and high output force.
2、 Main technical parameters
Nominal diameter DN mm
20
25
32
40
50
65
80
100
125
150
200
Rated flow coefficient Kv
straight line
6.9
11
17.4
27.5
44
69
110
176
275
440
690
Equal percentage
6.3
10
16
25
40
63
100
160
250
400
630
Rated travel L (mm)
16
25
40
60
Effective area of membrane (cm2)
280
400
600
1000
Signal range (kPa)
20-100, 40-200, 80-240
Gas source pressure (MPa)
0.14, 0.25
Inherent flow characteristics
Straight line, equal percentage
Inherent adjustable ratio
50
Allowable leakage amount
Hard seat unbalanced type: Class IV Soft seat: Class VI
Nominal pressure PN (MPa)
1.0, 1.6, 4.0, 6.4
Working temperature (℃)
Normal temperature type
-20-200, -40 to 250, -60 to 250
Heat dissipation type
-40-450, -60-450
High temperature type
300 ～ 560
Low temperature type
-60-100, -100 to -200, -200 to -250
3、 Main external connection dimensions
Nominal Diameter
20
25
32
40
50
65
80
100
125
150
200
A
282
308
394
498
L
PN16 ， 40
150
160
180
200
230
290
310
350
400
480
600
PN64
230
230
260
260
300
340
380
430
500
550
650
H 1
PN16
52.5
57.5
70
75
82.5
92.5
100
110
125
142.5
170
PN40
52.5
57.5
70
75
82.5
92.5
100
117.5
135
150
187.5
PN64
65
70
77.5
85
90
102.5
107.5
125
147.5
172.5
207.5
H
Standard type
PN16
429
438
474
477
502
626
662
687
836
896
987
PN40
429
438
474
477
502
626
662
695
845
896
1000
PN64
456
468
511
525
535
663
673
705
868
958
1260
High temperature heat dissipation type
570
570
610
610
630
730
810
820
960
1090
1180
Three Long Ordering Notice
1. Product model and name 2. nominal diameter DN (mm) 3. nominal pressure 4. flow characteristics requirements 5. valve body material and valve trim material
6. Type of medium and temperature range 7. Pressure difference before and after the valve 8. Sealing form 9. Supporting accessories, it is recommended that users install air filter triple fittings and two position five way solenoid valves
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