All weather breathing valve

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, benzene, methyl benzene, kerosene, light diesel, engine oil, crude oil, and chemical product storage tanks with similar properties. The all-weather breathing valve can be used in conjunction with the ZGB corrugated flame arrester.

For the safety of using the all-weather breathing valve, check whether the guide rod and valve disc are flexible before use. The all-weather breathing valve should be checked regularly (within 6 months) to ensure that the positive and negative valve discs of the ventilation port are flexible, and the contact surface of the valve disc is not damaged. If there is any damage, it should be repaired immediately. After maintenance, everything is normal and can be reused.

The new all-weather breathing valve housing is made of stainless steel, cast steel, and aluminum alloy, with good corrosion resistance; Simple structure, easy maintenance, safe and convenient; The performance of the new all-weather breathing valve fully complies with the regulations of the Ministry of Petroleum Industry standard SY7511-87. The valve disc is made of PTFE material, which is resistant to low temperature and has good anti freezing performance;

Breathing valve is a type of safety valve, which is a ventilation device fixed on the top of the storage tank to ensure the normal state of pressure inside the tank, prevent damage to the storage tank caused by overpressure or vacuum inside the tank, and reduce the evaporation loss of the tank. Breathing valves are usually used in conjunction with flame arresters.

The selection method of breathing valve:
1. The requirements for installation location and temperature range, such as the selection of all-weather breathing valves in cold areas, and the selection of pipeline type breathing valves for installation in pipelines.

 2. Mechanical breathing valve
The control pressure should be adapted to the relevant pressure bearing capacity. 

3. The specifications of the mechanical breathing valve should meet the maximum inlet and outlet breathing gas flow requirements of the oil tank.
Fifth, the installation and maintenance of the breathing valve should pay attention to the following matters
All types of breathing valves should be installed vertically. There should be no resistance at the outlet of the breathing valve to avoid compression. Before installation, the breathing valve should be specifically tested and its sealing should be checked. Regular inspections should be conducted on the breathing valve in use.

Sixth, Instructions for using the breathing valve:
The breathing valve is installed on the top of the storage tank to solve the problem of positive and negative pressure gas inside the tank, so that the liquid in and out of the tank is not obstructed. When the external liquid enters the tank, a large amount of gas is exhaled (called positive pressure). When the liquid inside the tank is output to the outside, it must be sucked into the tank from the outside air (called negative pressure). If the breathing valve automatically closes when it stops working, it will not leak the liquid and gas inside the tank, which ensures the quality of the liquid inside the tank.
The breathing valve is used on oil and liquid tanks to eliminate positive and negative pressure gases inside the tank, making it convenient for the liquid to enter and exit the tank. If there is no breathing valve installed on the tank, there may be certain obstacles for the liquid in and out of the tank, which may cause tank deformation and vibration. The product is designed reasonably, has a simple structure, and is easy to use; It is an essential product for storage tanks and is indispensable.

Breathing valve size：