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CN | EN

All-weather breathing valve

Technical Parameters

Product model: GFQ
Nominal diameter: DN50~300mm
Nominal pressure: PN0.6~1.6MPa
Working temperature: 30-60 ℃
Applicable media: kerosene, diesel, toluene, etc

Product Details

Applicable scope
The new all-weather breathing valve is suitable for storing Class A oil products with a flash point D of 28 ℃ and Class B oil products with a flash point D of 60 ℃, such as gasoline, benzene, methyl benzene, kerosene, light diesel, engine oil, crude oil, and chemical product storage tanks with the same properties. It can be used together with the new corrugated flame arrester.

Instructions
The breathing valve is installed on the top of the storage tank to solve the problem of positive and negative pressure gas inside the tank, so that the liquid inside the tank is not obstructed. When the external liquid enters the tank, a large amount of gas is exhaled (called positive pressure). When the liquid inside the tank is output to the outside, it must be sucked into the tank from the outside air (called negative pressure). If the breathing valve automatically closes when it stops working, it will not cause the liquid and gas in the tank to leak out, providing a favorable guarantee for the quality of the liquid in the tank.

Maintenance and upkeep
For the safety of using the breathing valve, check whether the guide rod and valve disc are flexible before use. This valve should be regularly (within 6 months) checked for flexibility of the positive and negative valve discs at the ventilation port, and for any damage to the contact surface of the valve disc. If there is any damage, it should be repaired immediately. After maintenance, everything is normal and can be reused.

National standard flange connection external dimensions: GB, JB


model

Installation dimensions（mm）

d1

d

d3

h

m-h

dn25 70 100 115 180 4×10

dn50

110

140

160

255

4×12

dn80

150

185

213

260

4×16

dn100

170

205

265

290

4×16

dn150

225

260

305

330

8×16

dn200

280

315

355

350

8×16

dn250

335

370

420

400

12×16


 American standard flange connection external dimensions: Ansi, API, and ASME can be provided as JIS standards

model

Installation dimensions（mm）

d1

d

d3

h

m-h

1" 79.5 108 115 180 4×15

2"

120.5

152

160

255

4×19

3"

152.5

190

213

260

4×19

4"

190.5

229

265

290

8×19

6"

241.5

254

305

330

8×22

8"

298.5

343

355

350

8×22

10"

362

406

420

400

12×25


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