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Pneumatic emergency shut-off valve
Model: QDQ421F-25/40
Nominal diameter: DN25??200mm
Nominal pressure: PN2.5 ~ 4.0MPa, JIS-10K , 20K
Temperature: -40?? + 80 ??
Medium: liquefied petroleum gas, natural
Gas source interface: PC1 / 4
High temperature dissolution temperature: 70 ?? 5 ??
Product details

Features:

????This is a safety protection valve installed in liquid and gas pipeline LPG storage and drainage stations, and air compressor (or gas tank) supporting the use of a large number of leaks in the pipeline, the gas pressure relief or high temperature Fusible alloy melts, the valve automatically stop leak, play a safety role in this valve can also be used as a pneumatic valve. Can achieve long-distance control, close quickly, open and flexible. 


 Performance Specifications: 

Nominal pressure PN

2.5, 4.0 MPa

Cylinder pressure

??4.0MPa

Suitable temperature T

-40 ?? +80 ??

Cylinder use medium

Suitable media

LPG, natural gas

Fused temperature

70 ?? ?? ?? 5 ??

Closing time

??10 seconds

Cylinder opening pressure

??4.0MPa


 Main dimensions and connection dimensions:  Unit: mm

DN

L

H

H1

D

D1

D2

b

f

Z-??d

25

160

230

230

115

85

65

16

2

4-14

32

180

240

240

135

100

78

18

2

4-18

40

200

250

250

145

110

85

18

3

4-18

50

230

270

270

160

125

100

20

3

4-18

80

310

320

320

195

160

135

22

3

8-18

100

350

360

360

230

190

160

24

3

8-23

150

480

510

510

300

250

218

30

3

8-25

200

600

550

550

360

310

278

30

4

12-25


The next??Angle gas valve
The previous??LPG globe valve