1. Characteristics of product:
The valve is ventilation device fixed on the roof of tank, reducing the evaporation loss of oil tank and controlling the pressure, ensure that the pressure balance inside and outside the tank and prevent external flame spread. The valve has characteristics of a large amount of ventilation, a small amount of leakage, corrosion resistance and so on and it has the electrostatic grounding wire so that the valve and the tank to keep other potential; The operating pressure range: positive pressure: 353Pa (36mmH2O) 980Pa (100mmH2O): 295Pa (30mmH2O), negative pressure breathing valve products to meet the requirements of SY/ T0511-1996 standard, all-weather breathing valve type A, B, C three operating pressure: A: -295pa +355pa, B: -295pa +980pa, C: -295pa - +1765pa.

2. Ordering instruction:
2.1 Please indicate the pressure range of products, and indicate the pressure level and specifications of the products.

2.2 The valve key part of products made of polytetrafluoroethylene material. When using, positive and negative pressure valve can not open at the same time. Therefore, in the storage and transportation, the installation should avoid products will be inverted and the violent collision.

2.3 Every six months to product positive, negative valve sliding properties and the fire retardant core to conduct a clean-up cleaning and inspection. Open the normal and fire resistance performance to ensure.

2.4 Please indicate the product name, type, specifications and so on when ordering.

3. Drawing of product: