Product Center

Breathing Valve Series

Single exhaling valve

|Product introduction

According to the national standard "petrochemical enterprise design fire code" (GB50160-90) regulations, "a, B type liquid fixed roof tank, the application of flame arrester and breathing valve". Visible breathing valve, flame arrester is an indispensable safety equipment storage tanks. It can not only maintain the tank pressure balance, to ensure that the tank in the overpressure or vacuum when the rabbit was destroyed, and can reduce the volatile and loss of medium in the tank. The valve is arranged on the top of the nitrogen sealing tank, which is a safe and energy-saving product for maintaining the pressure balance of the storage tank and reducing the volatilization of the medium.
My company's production of breathing valve, with a compact structure, large ventilation, small leakage, corrosion resistance, good sealing performance, etc..

|product mix

|Product technical parameters

[main technical parameters]:
Housing material: carbon steel, aluminum alloy, stainless steel (SUS304, SUS304L, SUS316, SUS316L), fluorine, plastic
Internal core components: valve disc, valve seat, valve stem, valve sleeve. Internal core material: stainless steel or ptfe.
Sealing ring material: ptfe.
Ambient temperature: -40~+60OC.
Operating pressure:
Type A: +355Pa (+36mmH20), -295Pa (-30mmH20)
Type B: +980Pa (+100mmH20), -295Pa (-30mmH20)
Type C: +1750Pa (+180mmH20), -295Pa (-30mmH20)
Type D: special pressure, user specified.
Fire resistant layer material: stainless steel.
Explosion proof grade: 5501:IIA IIB, BS, IIC.
Flange standard: GB, HG, SH, HGJ, JB, ANSL, JIS and other standards. (user specified, please specify pressure level)
Manufacturing and testing standards: according to (oil storage tank valve) SY7511-87, (oil tank fire resistance and fire resistance performance and test methods) GB5908-86 and other standards for manufacturing and acceptance, or user specified standard.
[main dimension]:
Nominal diameter Outline dimension
 DN H L
50 270 240
80 300 290
100 300 310
150 350 380
200 400 480
250 420 550
300 500 640

|Installation and maintenance

1, In transported to the site, if not installed or after the factory overhaul, rainproof facilities should be stored in a warehouse. Respiratory valve products in the transportation shall not be inverted.
2, breathing valve common fault: leakage, card die, bond, jam, ice, rust, and positive pressure valve and vacuum valve normally open and so on. These faults some will make breathing valve to control pressure can not move, resulting in tank overpressure, which endangers the safety of the tank; some will make breathing valve lose effect, causing large and small breathing out to Pei gas evaporation loss, the oil quality under long, or aggravate the pollution to the atmosphere around the tank, increase regional risk factors.
3, in addition to routine inspection and maintenance of the respiratory valve, but also should be regularly carried out a comprehensive inspection and maintenance, generally the first and fourth quarter of the year two times a month, the two or three quarter of the month to check once. Inspection and maintenance of the main contents are:
1. Open the breathing valve cover, check for breathing valve within the valve plate, a valve seat, a guide rod, a guide hole, a spring etc. there is no rusting and fouling, and clean, if necessary with kerosene cleaning;
Check valve plate opening and closing is flexible, without card hysteresis phenomenon, valve disc and valve seat contact surface (sealing surface) is good, when necessary, remove the repair, the sealing surface of the material for nonferrous metal, using lubricating oil, abrasive grinding;
Check valve seal is intact, there is no frozen, blocked, should wipe off the dirt and dust on the Internet, to ensure the smooth flow of gas;
Check the gland liner is tight, should be replaced when necessary;
The bolt for gas protection.
The breathing valve products inside and outside of the housing surface paint shall annually besmear again again.

|Order notice

Order shall be determined by the following parameters: diameter; work pressure; (3) material; (4) flange standard; dielectric; the operating pressure; to give you provide suitable products.

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