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QDQ421F-25/40 Pneumatic Emergency Shut-off Valve

Product overview

Product model: QDQ421F-25/40
Nominal diameter: DN25∽200mm
Nominal pressure: PN2.5~4.0MPa, JIS-10K, 20K
Applicable temperature: -40∽+80℃
Applicable medium: liquefied gas, natural gas
Air source interface: PC1/4
High temperature solution-closing temperature: 70±5℃

QDQ421F-25/40 Pneumatic Emergency Shut-off Valve product details

QDQ421F-25/40 Pneumatic Emergency Shut-off Valve features:

QDQ421F-25/40 Pneumatic Emergency Shut-off Valve produced and sold by Baigang valve group is a kind of safety protection valve.It is installed on the liquid phase and gas phase pipeline of liquefied petroleum gas storage and irrigation station and used with air compressor (or gas storage tank), so that when a large amount of pipeline leakage occurs, pressure relief of air source or high temperature will melt the fusible plug alloy, and the valve will automatically close and stop leakage, playing a role of safety protection.This valve can also be used as a pneumatic globe valve.It can realize remote control, close quickly and open flexibly.


QDQ421F-25/40 Pneumatic Emergency Shut-off Valve 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


QDQ421F-25/40 Pneumatic Emergency Shut-off Valve Main dimensions and connection dimensions:  Unit: mm

DN

L

H

H1

D

D1

D2

b

f

Z-φd

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



Reminder:

All text, data and pictures in this article are for reference only.To see more details of the QDQ421F-25/40 Pneumatic Emergency Shut-off Valve performance parameters, structural dimension parameters, pricing, etc., or to request high quality printing samples, please Contact us.

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