Products > Other valve > All-weather breathing valve

All-weather breathing valve

Model: GFQ-11
Nominal diameter: DN25 ~ 250mm (1 "~ 10")
Operating temperature: -30 ~ 60 ℃
body material: carbon steel WCB, 304,316 stainless steel, aluminum
Application: gasoline, benzene, methyl stupid, the same kerosene, light diesel oil, crude oil and other chemical properties of the product storage tank
Connection: flanged (II) a threaded connection (III) male thread (IV)
Design standards: GB5908-86, GB1347 -92
Flange Standard: HG 20592-97, ANSI B 1.6, GB HGJ SH JB
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Scope of application The
       new all-weather breathing valve is suitable for storing Class A oil with flash point D at 28 ℃ and class B oil with flash point D at 60 ℃, such as gasoline, stupid, stupid, kerosene, light diesel oil, engine oil, crude oil, etc. Oil products and properties of the same chemical storage tanks. Can be used with the new corrugated flame arrester.


 
 Instructions for use
       Breathing valve installed in the top of the tank, is to solve the positive pressure tank, negative pressure gas, the tank of liquid access is not hindered, when the external liquid into the tank when a large number of gas out call (called positive pressure) . If the tank liquid output when the tank must be drawn into the tank from the outside air (called negative pressure). Stop breathing when the valve is automatically closed will not leak the liquid gas tank, so that the liquid inside the tank has been a good guarantee.


 
 MAINTENANCE AND SERVICING
       For the safety of the breathing valve, check whether the guide rod and the valve plate are flexible before use. This valve should be regularly (within 6 months) check the positive and negative valve disc is flexible, valve disc contact surface for damage, if damaged should be overhaul immediately. After maintenance, everything is normal and can be reused.

 

The main technical parameters

aJ positive pressure355pa (36mm water column)
Negative pressure295pa (30mm water column)
b-level pressure980pa (100mm water column)
Negative pressure295pa (30mm water column)
c-class pressure1765pa (180mm water column)
Negative pressure295pa (30mm water column)


 Parts and materials

Body materialCarbon steel wcb, stainless steel 304,316, aluminum
Positive pressure valve disc materialStainless steel 304,316, aluminum alloy
Negative pressure valve disc materialStainless steel 304,316, PTFE ptfe
Ambient temperature ℃-30 ~ 60


 GB flange connection Dimensions: gb, jb

specification

Installation size (mm)

d1

d

d3

h

mh

dn25701001151804 × 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 Dimensions: ansi, api, asme for jis standard

specification

Installation size (mm)

d1

d

d3

h

mh

1"79.51081151804 × 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