1. Main application:
The fire breathing valve with connection pipe is installed on top of tank with fixed roof indoor. It can automatically adjust the pressure difference inside and outside the tank Its performance is reliable and stable, fully in line with the national standard GB5908-2004, suitable for storage of gasoline, kerosene, diesel, benzene, thick oil medium tank.

2. The characteristics of product:
According to structure, there are fire breathing valve with single connection pipe and fire breathing valve with double connection pipes
2.1 The fire breathing valve with single connection pipe is suitable for storing A Class oil of which the flash point is lower than 28 ℃ and B Class oil of which the flash point is lower than 60 ℃, such as the oil tanks with the same as oil and same properties such as gasoline, benzene, kerosene, light diesel oil and heavy oil.
2.2 The fire breathing valve with double connection pipes is suitable for storing A Class oil of which the flash point is lower than 28 ℃ and B Class oil of which the flash point is lower than 100 ℃, such as the oil tanks with the same as oil and same properties such as benzene, kerosene, light diesel oil, gasoline, heavy oil.

3. Ordering instruction:
3.1 The key part of the valve for products adopts polytetrafluoroethylene material. It is impossible to open the positive and negative pressure valve at the same time. Therefore, in the storage and transportation, the installation should avoid products will be inverted and the violent collision.

3.2 To carry out a clean dust and the examination of positive, negative valve sliding properties and the fire retardant core products regularly for ensuring the normal breathing valve opens and the fire resistance performance.