VIP member
Compact pneumatic double seat regulating valve
The precision small pneumatic double seat regulating valve has two valve seats inside the valve body, and the fluid flows out through the upper and lo
Product details
The precision small pneumatic double seat regulating valve has two valve seats inside the valve body, and the fluid flows out through the upper and lower sealing surfaces of the valve core. It has a small unbalanced force and is a balanced structure that allows for the use of large pressure differentials. It is suitable for situations with large pressure differentials, high flow rates, and less strict requirements for leakage. It is widely used in industrial sectors such as petroleum, chemical, pharmaceutical, metallurgical, power station, etc., to control media such as gases, liquids, and steam.
1、 Precision small pneumatic double seat regulating valve body
Valve body form: Straight through double seat cast ball valve
Nominal diameter: 25-300mm
Nominal pressure: PN1.6 4.0 6.4MPa
Connection type: flange type according to JB78-59 JB79-59
Material Science: HT200 ZG230—450 ZG1Cr18Ni9Ti ZG0Cr18Ni12Mo2Ti
2、 Valve cover on precision small pneumatic double seat regulating valve
Room temperature type:- 20℃~+200℃
Heat dissipation type:- 40℃~+450℃
Cover form: bolt compression type
Packing: V-shaped polytetrafluoroethylene packing, flexible graphite, stainless steel corrugated pipe.
3、 Precision small pneumatic double seat regulating valve internal components
Valve core type: Double guide double seat plunger type valve core
Flow characteristics: linear characteristics, equal percentage characteristics, or quick opening characteristics
Material: 1Cr18Ni9Ti 0Cr18Ni12Mo2Ti
4、 Precision small pneumatic double seat regulating valve actuator
Type: Multi spring thin film actuator
Membrane material: Nitrile rubber clip reinforced polyester fabric
Spring range: 0.02~0 1. 0.04~0.20MPa
Gas supply pressure: 0.14 0.16 0.28MPa
Air source connector: M10 × 1
Environmental temperature:- 30~+70℃
5、 Precision small double seat pneumatic control valve Valve action type: gas closed or gas open
Attachment: Positioner, Handwheel Mechanism
Performance: (with locator)
Leakage rate: less than 0.5% of the rated flow coefficient Kv
Basic error: ± 1.5%
Return difference: 1.5%
Dead zone: 0.6%
Constant point deviation: ± 1.5%
Adjustable range: 30:1
6、 Flow coefficient of precision small pneumatic double seat regulating valveKvTravel and allowable pressure difference
|
Nominal diameter (mm)
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
125
|
150
|
200
|
||
|
Valve seat diameter (mm)
|
15
|
20
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
125
|
150
|
200
|
|
Flow coefficient Kv
|
4
|
6.3
|
10
|
16
|
25
|
40
|
63
|
100
|
160
|
250
|
400
|
630
|
|
Travel distance (mm)
|
16
|
25
|
40
|
60
|
||||||||
|
Allowable pressure difference (MPa)
|
5.8
|
4.9
|
3.8
|
2.9
|
4.0
|
3.3
|
2.6
|
3.6
|
3.0
|
2.3
|
||
Note: Allowable pressure difference in valve open state
7、 Dimensions of Precision Pneumatic Double Seat Regulating Valve
|
nominal
orifice
|
execute
institution
|
H
|
ΦA
|
H1
|
L
|
|||
|
Normal temperature type
|
Heat dissipation type
|
PN1.6
|
PN4.0
|
PN6.4
|
||||
|
25
|
ZHA22
|
498
|
648
|
285
|
117
|
185
|
190
|
205
|
|
32
|
ZHA22
|
501
|
651
|
285
|
120
|
200
|
210
|
220
|
|
40
|
ZHA22
|
522
|
691
|
285
|
139
|
220
|
230
|
240
|
|
50
|
ZHA22
|
530
|
699
|
285
|
144
|
250
|
255
|
265
|
|
65
|
ZHA34
|
645
|
815
|
363
|
188
|
275
|
285
|
295
|
|
80
|
ZHA34
|
661
|
835
|
363
|
208
|
305
|
310
|
325
|
|
100
|
ZHA34
|
687
|
887
|
363
|
220
|
350
|
355
|
370
|
|
125
|
ZHA34
|
1234
|
1444
|
363
|
270
|
410
|
425
|
440
|
|
150
|
ZHA45
|
1242
|
1492
|
470
|
280
|
450
|
460
|
475
|
|
200
|
ZHA45
|
1394
|
1654
|
470
|
320
|
550
|
560
|
570
|
8、 Specification for Model Compilation of Precision Small Pneumatic Double Seat Regulating Valve
|
Z
|
J
|
H
|
N
|
25
|
P
|
G
|
B
|
| Automatic control valve |
Executing Agency:
|
Executing Agency:
|
Valve structure type:
|
Nominal pressure:
|
Valve body material:
|
Temperature type:
|
Type of action:
|
|
|
J： Indicating small and precise size
|
Multi spring pneumatic thin film
|
P： Indicating a single seat
|
16: Indicating 1.6MPa
|
C： Representing carbon steel
|
G： Medium temperature type, room temperature omitted
|
K： Indicating air opening type
|
|
|
|
|
N： Representing two seats
|
25: represents 2.5MPa
|
P： Representing stainless steel
|
|
B： Indicate the type of air seal
|
|
|
|
|
M： Indicating sleeve valve
|
40: represents 4.0MPa
|
|
|
|
|
|
|
|
|
64: represents 6.4MPa
|
|
|
|
Online inquiry
-
Contacts
-
Company
-
Telephone
-
Email
-
WeChat
-
Verification Code
-
Message Content
-