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ZJHN Pneumatic Thin Film Double Seat Regulating Valve
Caliber range: DN25-400mm Pressure range: PN1.6-6.4MPa Applicable temperature: -250 ℃~+560 ℃ Product application: Widely used for precise control of p
Product details
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ZJHN Pneumatic Thin Film Double Seat Regulating Valve
1、 Product Features
The ZJHN pneumatic thin film double seat regulating valve adopts a dual number guiding structure and is equipped with a multi spring actuator. It has the advantages of compact structure, light weight, sensitive action, large valve capacity, precise flow characteristics, and easy disassembly and assembly. Widely used for precise control of process parameters such as pressure, flow rate, temperature, and liquid level in media such as gases, liquids, and steam to maintain them at given values. Especially suitable for media with large pressure differences, large allowable leaks, and not very clean environments.
This series of products includes various varieties such as standard type, corrugated pipe sealing type, jacket insulation type, etc. The nominal pressure rating of the product includes PN16, 40, and 64; The valve body diameter range is DN25-400. The applicable fluid temperature ranges from -250 ℃ to+560 ℃ in various grades. The leakage standards are Level III and Level IV. The flow characteristics are linear or percentage.2、 Main component materials
Part name
material
temperature range
Valve cover on valve body
HT200
-20～200℃
ZG230-450
-40～450℃
ZG1Cr18Ni9Ti
-250～550℃
ZG0Cr18Ni12Mo2Ti
-250～550℃
Valve core and seat
1Cr18Ni9
-250～550℃
0Cr18Ni12Mo2Ti
-250～550℃
Packing material
PTFE
-40～200℃
Diaphragm film
Ding Qing rubber clip reinforced polyester fabric
compression spring
60Si2Mn
Membrane cover
A3
3、 Specification and Technical Parameters of Pneumatic Thin Film Double Seat Regulating Valve
Nominal diameter mm
25
32
40
50
65
80
100
125
150
200
250
300
400
Rated flow coefficient kv
10
16
25
40
63
100
250
250
400
630
100
1600
2700
Nominal pressure MPa
1.6 4.0 6.4
Travel distance mm
16
25
40
63
100
Medium temperature ℃
-40-230 ℃ (normal temperature type), heat sink 230-450 ℃ (medium temperature type), special order -100-600 ℃
Traffic characteristics
Straight line, equal percentage
Flange standard
Compliant with JB78-59 and JB79-59 standards, can be ordered and produced according to JB/79.1-94, JB/79.2-94, ANSI, JIS, DIN and other standards
valve body
materialPN
(MPa)1.6
WCB(ZG230-450) CF3CF8 CF8M
4.0,6.0
WCB (ZG230-450), ZG1Cr18Ni9Ti, ZG0Cr18Ni12Mo2Ti CF8 CF8M
Valve core material
1Cr18Ni9, 0Cr18Ni12Mo2Ti CF8 CF8M
Upper valve cover type
Ordinary type (constant temperature type), hot plate type (medium temperature type)
rangeability
30:1
Air source connector
M16×1.5
Note: ANSI, JPI, JIS flange products can be provided to users, with flange spacing determined according to user needs.
4、 Main technical parameters of the actuator of the pneumatic diaphragm double seat regulating valve
Model number
ZHA(B)-1
ZHA(B)-2
ZHA(B)-3
ZHA(B)-4
ZHA(B)-5
ZHA(B)-6
Effective area cm2
200
280
400
630
1000
1600
Travel distance mm
10
16
25
40
60
1000
Spring range KPa
20-100 (standard); 20-100, 40-200, 20-60, 60-100, 80-240
5、 Main technical performance indicators of pneumatic diaphragm double seat regulating valve
project
Indicator value
Basic error%
Without locator
±5.0
Equipped with locator
±1.0
Return difference%
Without locator
3.0
Equipped with locator
1.0
Dead zone%
Without locator
3.0
Equipped with locator
0.4
Allowable leakage rate L/h
1×10-3Rated capacity of valve
Can be equipped with accessory locators: electric valve locators, handwheels, solenoid valves, limit switches, electric/pneumatic converters, air filters, and pressure reducers
6、 Pneumatic thin film double seat regulating valve allows pressure difference
air supply pressure
MPaspring pressure
KPaNominal Diameter
25
32
40
50
65
80
100
125
150
200
250
300
0.14
20-100
5.4
4.4
4.9
3.8
4.7
3.6
2.8
3.75
2.7
2.15
2.0
1.7
0.24
40-200
10.8
8.8
9.8
7.6
9.4
7.2
5.6
7.5
5.4
4.3
4.0
3.4
Note: The usage condition is that the valve stem is in the P2=0 state when the medium outlet end is closed.
7、 Main external connection dimensions
Public diameter (mm)
25
32
40
50
65
80
100
125
150
200
250
300
L
(mm)PN1.6MPa
185
200
220
250
275
300
350
410
450
550
670
770
PN4.0MPa
190
210
230
255
285
310
335
425
460
560
740
805
PN6.4MPa
200
210
235
265
295
320
370
440
475
570
750
820
H
(mm)Common
567
570
645
650
877
887
899
1058
1068
1110
1498
1574
Heat sink type
697
700
775
780
1040
1050
1062
1257
1267
1309
1743
1819
H1(mm)
117
120
139
144
188
208
220
268
278
320
441
503
D(mm)
225
360
470
620
Weight (KG)
33
35
47
51
98
111
148
236
292
433
760
920
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