A, product features:
The valve is ventilation device is arranged in the fixed roof tank, reducing the evaporation loss of oil tank, pressure control, ensure that the pressure balance inside and outside the tank and prevent external 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, all-weather breathing valve type A, B, C three operating pressure: A: -295pa +355pa, B: -295pa +980pa, C: -295pa - +1765pa.
Two, product order information:
1, please according to product specification statements indicate the order products are all-weather type pressure standard range, and indicate the pressure level and specifications of the products.
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, product design legend:
Four technical parameters, product:
公称通径 | 法兰外径D1 | 法兰孔距D1 | 工作压力Mpa | 材 质 |
DN40 | f130 | f100 | 0.6-2.5 | 铸铁,铸钢,铝合金 |
DN50 | f140 | f110 | 0.6-2.5 | 铸铁,铸钢,铝合金 |
DN80 | f185 | f150 | 0.6-2.5 | 铸铁,铸钢,铝合金 |
DN100 | f205 | f170 | 0.6-2.5 | 铸铁,铸钢,铝合金 |
DN150 | f260 | f225 | 0.6-2.5 | 铸铁,铸钢,铝合金 |
DN200 | f315 | f280 | 0.6-2.5 | 铸铁,铸钢,铝合金 |
DN250 | f335 | f335 | 0.6-2.5 | 铸铁,铸钢,铝合金 |