A, product features:

The valve is installed in the ventilation device is fixed on the top of the tank or tanks, reduce the evaporation loss, control the tank pressure, keep the pressure balance, at the same time, to prevent the outside effect of flame spread. The valve has a large amount of ventilation, a small amount of leakage, corrosion resistance and other characteristics, and the electrostatic grounding wire, so that the valve and the tank to keep other potential; 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, divided into common type and all-weather type two series and A, B, C three operating pressure: A: -295pa +355pa, B: -295pa +980pa, C: -295pa - +1765pa.

Two, ordering instructions:

1, please according to product specification statements indicate the order products are all-weather type (Q) and ordinary type (P), and indicate the pressure level and specifications of the products.

The valve key part 2, products made of polytetrafluoroethylene material. In use, 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.

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.

4, please pay attention to the name, specifications, models, specifications.

Three, the technical parameters: