According to the national standard "code for fire protection design of petrochemical industry > (GB50160-90) regulations," a fixed roof tank B liquid, application of flame arrestor and breather valve. Breather valve and flame arrestor are indispensable safety devices.
It can not only maintain the tank pressure balance, ensure the tank overpressure or vacuum in the rabbit when damaged, and can reduce the volatilization and loss in the tank. The tank pressure breathing valve is to maintain balance, reduce product safety and energy saving medium volatile, often associated with the use of flame arresters.
Shell material: carbon steel, stainless steel (SUS304, SUS304L, SUS316, SUS316L), fluorine, plastic.
Internal core: valve disc, valve seat, valve stem, valve cover.
Internal core material: stainless steel or ptfe.
Sealing ring material: ptfe.
Ambient temperature: -40~+60.
Breathing valve, with compact structure, large ventilation capacity, small leakage, corrosion resistance, good sealing performance and so on.
Disc with PTFE material, with low temperature, antifreeze and other advantages. An electrostatic output device is arranged in the valve, so that the valve is kept equal to the tank body at a time.
Operating pressure:
A type: -295Pa (-30mmH20) +355Pa (+36mmH20)
B type: -295Pa (-30mmH20) +980Pa (+100mm H20)
C type: -295Pa (-30mmH20) +1750Pa (+180mm H20)
D type: -295Pa (-30mmH20) +9800Pa (+1000mm H20) (special pressure, user specified)
Explosion proof grade: 5501:IIA IIB, BS, IIC.
|
DN
|
20
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
125
|
150
|
200
|
|
in
|
3/4
|
1
|
11/4
|
11/2
|
2
|
21/2
|
3
|
4
|
5
|
6
|
8
|
|
L
|
160
|
160
|
160
|
160
|
160
|
213
|
213
|
265
|
306
|
355
|
420
|
|
H
|
160
|
255
|
255
|
255
|
255
|
260
|
260
|
290
|
330
|
330
|
350
|
Flange standard: GB, HG, SH, HGJ, JB, ANSL, JIS and other standards. (user specified, please specify pressure level)
Manufacturing, testing standards: according to (oil tank breather valve) SY7511-87, (petroleum tank fire arrester performance and test methods) GB5908-86 standards such as manufacturing and acceptance; or user specified standards.
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