GFQ-2 type all-weather breather valve

product description

The GFQ-2 type all-weather breathing valve is used on oil and liquid tanks to remove the positive and negative pressure gas in the tank, so that the liquid in the tank is convenient to enter and exit. If the tank body is not equipped with a breathing valve, the liquid in the tank enters and exits to a certain degree Obstacles, tank deformation and vibration are likely to occur. According to the standard "Code for Fire Protection Design of Petrochemical Enterprises" (GB50160-90). "Fixed top tanks for Class A and Class B liquids shall use flame arresters and breathing valves." It can be seen that breathing valves and flame arresters are indispensable safety facilities for storage tanks. It can not only maintain the pressure balance of the storage tank, ensure that the storage tank is not damaged under overpressure or vacuum, but also reduce the volatilization and loss of the medium in the tank. Breathing valve is a safe and energy-saving product that maintains the air pressure balance of the storage tank and reduces the volatilization of the medium. It is often used in conjunction with a flame arrestor. The product has reasonable design, simple structure and convenient use; it is an indispensable product for storage tanks and is indispensable.

Performance and characteristics:

The new all-weather breathing valve shell is made of cast iron, cast steel and aluminum alloy, which has good corrosion resistance;

The valve disc is made of tetrafluoroethylene, which is resistant to low temperature and has good antifreeze performance;

Simple structure, easy to check and repair, safe and convenient;

The performance of the new all-weather breathing valve fully complies with the standard SY7511-87 of the Ministry of Petroleum Industry.

technical parameter

Shell material: carbon steel, aluminum alloy, stainless steel (SUS304, SUS304L, SUS316, SUS316L), fluorine lining.

Internal core parts: valve disc, valve seat, valve stem, valve sleeve.

Internal core material: stainless steel or polytetrafluoroethylene.

Seal ring material: PTFE

Ambient temperature: -40~+60℃.

Operating pressure: Type A: +355Pa (+36mmH2O), -295Pa (-30mmH20)

Type B: +980Pa(+100mmH2O), -295Pa(-30mmH2O)

Type C: +1750Pa(180mmH2O), -295Pa(-30mmH2O)

Special pressure, according to user's designation.

Flange standards: GB, HG, SH, HGJ, JB, ANSL, JIS and other standards. (Specified by the user, please indicate the pressure level)

Manufacturing and testing standards: According to (petroleum storage tank breathing valve) SY7511-87, (petroleum storage tank flame arrestor performance and test method) GB5908-86 and other standards for manufacturing and acceptance; or user-specified standards.

Scope of application:

The new all-weather breathing valve is suitable for storing Class A oil products with a flash point below 28 ℃ and Class B oil products with a flash point below 60 ℃, such as gasoline, stupid, toluene, kerosene, light diesel, engine oil, crude oil, etc. And storage tanks for chemical products of the same nature. It can be used with new corrugated flame arrester.

Instructions for use:

The breathing valve is installed on the top of the storage tank to solve the positive and negative pressure of the gas in the tank, so that the liquid in the tank is not obstructed. When the external liquid is input into the tank, a large amount of gas is exhaled (called positive pressure). For example, when the liquid in the tank is output to the outside, the inside of the tank must be sucked into the tank from outside air (called negative pressure). If the breathing valve is automatically closed when the work is stopped, the liquid and gas in the tank will not leak out, so that the quality of the liquid in the tank is advantageously guaranteed.

maintenance:

In order to use the breathing valve safely, check whether the guide rod and valve disc are flexible before use.

This valve should be checked regularly (within 3-6 months) whether the positive and negative valve discs of the vent are flexible and whether the contact surface of the valve disc is damaged. If there is any damage, it should be repaired immediately. After the overhaul, everything is normal and can be reused.

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