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Hotline0513-83351077

Service Hotline:0513-83351077 Tel:0513-833519400513-83841007
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Breather valve, Flame arresting breather valve
Description of products

According to national standard《Fire-prevention code of petrochemical enterprise design》( GB50160-92 ) that the vat for containing Cat.A and B liquids must have flame arrestor and breathing valve. It is very clear that breather valve and flame arrestor is an indispensable device for container. It can keep the storage pressure balanced to prevent the container from being damaged during over-pressure or vacuum condition and reduce the loss and volatilization of medium in the container.
Breather valves manufactured by our company feature compact structure, large flow rate, high-quality sealing performance and less leakage. Our company has developed an advanced world-level breather valve with arrester on the inlet of the breather valve, which can prevent any fire source into the valve body and features small compact, lightweight and convenient repair, cleaning and replacement.

Main technical specifications
◆Suitable to special liquid and gas of petroleum, chemical, medicinal energy engineering;
◆ Operating pressure:
A: -295Pa (-30mmH2O) +355Pa (+36mmH2O)
B: -295Pa (-30mmH2O) +980Pa (+100mmH2O)
C: -295Pa (-30mmH2O) +1750Pa (+180mmH2O)
D: -295Pa (-30mmH2O) +98000Pa (+10000mmH2O)
◆Explosion class; BS 5501:IIA、IIB、IIC
◆Shell material: Carbon steel Al. alloy,
◆Material of valve disc and seat: Al.alloy, stainless steel;
◆Sealing material: Tetrafluoroethylene;
◆Flange standards: HG20592-97 PN1.0. If the customer requires GB,HGJ, JB, ANSI,JIS or change pressure grade, clear it in the contract.
◆Manufacturing, test and inspection should be in accordance with standards: SY7511, 《Manufacturing, test and inspection of breather valve used for petroleum container 》, GB5908-1986 《Fire arrestment performance and test methods of arrestor used for petroleum container》.
Product model and specifications
DN
50 80 100 150 200 250
H
280
350
430
500
430
600
530
600
630
700
730
820
H1
110
180
182
250
180
250
220
290
260
330
320
400
L
320 450 450 320 750 850
Figures in the bottom line refer to SLG-IZ size
DN
50
80
100
150
200
250
H
280
430
430
530
630
730
350
500
500
600
700
820
L
210
350
350
535
700
850
Figures in the bottom line refer to SLG-IIZ size
DN
50
80
100
150
200
250
H
280
400
400
470
550
620
320
470
470
540
625
700
H1
110
160
160
200
250
290
180
270
270
270
320
370
L
320
420
420
520
650
760
L1
185
250
250
320
400
480
Figures in the bottom line refer to SLG-IIIZ size
DN
50
80
100
150
200
250
H
280
430
530
530
630
730
350
500
600
600
700
820
H1
110
180
180
200
260
320
180
250
250
290
330
400
L
310
450
450
635
800
950
Figures in the bottom line refer to SLG-IVZ size
DN
50
80
100
150
200
250
H
250
400
400
470
550
625
320
470
470
540
620
700
L
290
420
420
535
700
635
Figures in the bottom line refer to SLG-VZ size
DN
50
80
100
150
200
250
H
250
400
400
470
550
620
320
470
470
540
625
700
H1
110
160
160
200
250
290
180
230
270
270
320
370
L
300
420
420
520
650
760
L1
185
250
250
320
400
480
Figures in the bottom line refer to SLG-VIZ size
DN
50
80
100
150
200
250
H
270
400
400
470
550
620
340
470
470
540
620
700
L
290
420
420
535
700
635
Figures in the bottom line refer to SLG-VIIZ size
DN
50
80
100
150
200
250
H
280
430
430
530
630
730
350
500
500
600
700
820
H1
110
180
180
220
260
320
180
250
250
290
330
400
L
310
450
450
635
800
950
Figures in the bottom line refer to SLG-VIIIZ size
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