type all-weather resistance fire breathing valve

type all-weather resistance fire breathing valve

Product model: QZF
Valve diameter: DN25-300mm
Nominal pressure: PN0.3~1.6MPa
Applicable temperature: 30 ℃~60 ℃
Applicable media: kerosene, diesel, toluene, etc

Performance and characteristics

The QZF all-weather fire-resistant breathing valve is a ventilation device installed on a fixed roof tank, which reduces oil evaporation loss, controls tank pressure, and prevents external flames from entering. This valve has the characteristics of high ventilation, low leakage, corrosion resistance, and has an electrostatic grounding wire to maintain an equal potential with the tank body. This valve has antifreeze performance and is suitable for cold regions.

National standard flange connection external dimensions: GB, JB


Model


Installation dimensions（mm）

D1

D

L

H

N-d

DN50

?110

?140

362

360

4×14

DN80

?170

?185

513

445

4×18

DN100

?170

?205

513

445

4×16

DN150

?225

?260

640

610

8×18

DN200

?280

?315

770

700

8×18

DN250

?335

?370

918

828

12×18

DN300

?395

?435

1050

910

12×23

 
American standard flange connection dimensions: ANSI, API, ASME available for JIS standards

model

Installation dimensions（mm）

D1

D

L

H

N-d

2

120.5

152

362

360

4×14

3

152.5

190

513

445

4×18

4

190.5

229

513

445

4×16

6

241.5

254

640

610

8×18

8

298.5

343

770

700

8×18

10

362

406

918

828

12×18

12

483

432

1050

910

12×23