Application of products with dual connecting pipe flame retardant breathing valve:

The breathing valve with double connecting pipes is a ventilation device installed on the top of a storage tank. It not only avoids accidents caused by sudden overpressure in the tank, but also maintains the pressure balance of the tank and reduces the volatilization of the medium. The breathing valve fully utilizes the pressure bearing capacity of the tank to reduce the discharge of the medium. Its principle is to use the weight of the positive and negative pressure valve discs to control the positive and negative pressure of the tank's exhaust and suction; When the medium is extracted from the outside of the tank, the pressure in the upper gas space inside the tank decreases, reaching the operating negative pressure of the breathing valve. The atmosphere outside the tank opens the negative pressure valve disc of the breathing valve, allowing external gas to enter the tank, preventing further pressure drop, and balancing the air pressure inside and outside the tank to protect the protective device of the tank. It is particularly suitable for arched atmospheric tanks with nitrogen capped storage materials. It has the characteristics of constant pressure discharge, flexible opening and closing, compact structure, good sealing performance, reliability, large ventilation capacity, small leakage, and corrosion resistance. The valve disc is made of polytetrafluoro material, which has advantages such as low temperature resistance and frost resistance.

Product features and performance:

The fire breathing valve with double connecting pipes is a connecting pipe installed on the top of a fixed indoor storage tank, which has a fire breathing function. It can automatically adjust the pressure difference inside and outside the oil storage tank, and its performance is reliable and stable, fully complying with the SY7511-87 standard of the Ministry of Petroleum Industry.

Product Scope of Application:

The breathing valve with dual connecting pipes is suitable for storing temperatures below 28 ℃. Class A oil products and Class B oil products with a flash point below 100 ℃, such as gasoline, kerosene, light diesel, thick oil, and chemical product storage tanks with similar properties.

Main technical parameters:

Operating pressure

+980Pa

+100mmH2O

-295Pa

-30mmH2O

Product maintenance and upkeep:

In order to ensure the performance of the fire breathing valve with double connecting pipes and achieve safe use, the fire breathing valve should be regularly inspected and maintained:

1. Check if the pressure valve disc and vacuum valve disc move flexibly, and if there is any damage to the contact surface of the guide rod and valve sealing ring.

2. When reinstalling the pressure plate and vacuum plate, ensure that the contact surface is tight and the guide rod can be lifted and lowered flexibly.

3. When using a new breathing valve, the shock absorber on the valve disc must be removed.