The working principle and maintenance of breathing valve

The valve body of the breathing valve can withstand 0.2Mpa water pressure, no penetration and deformation phenomenon. Breathing valve resistance to low temperature performance in the air relative humidity greater than 70%, the lowest temperature is -30 °C, after 24 hours of freezing, the valve opening pressure in line with the working pressure requirements, (allowing a pressure difference of plus or minus 20pa).

When the valve plate of the GTQ type vent pipe operates, the sensitivity is high, and after the operation is completed, the seal is guaranteed. There is enough space in the valve of the breathing valve to ensure the ventilation of the tank. Before the breathing valve did not reach the working pressure: nominal diameter ≤ 150mm, its leakage ≤ 0.04m3 / h; nominal diameter ≥ 220mm, its leakage ≤ 0.4m3 / h; when the breathing valve reaches the working pressure: valve disc immediately Open to ensure proper venting of the tank.

Features and Performance New pipe flame arrester material used: cast iron, cast steel, stainless steel, aluminum alloy, good corrosion resistance. The valve plate and valve seal ring are made of stainless steel PTFE. Low temperature resistance, good antifreeze. The valve is a ventilation device installed on the fixed top tank to reduce the evaporation loss of the oil and control the pressure of the storage tank. The valve has a large amount of ventilation, a small amount of leakage, corrosion resistance, and good antifreeze. It can automatically adjust the pressure inside and outside the oil tank.

The gas flame arrester has a simple structure, light weight, easy maintenance, and easy installation. Water pressure test qualified. Resistance to low temperature and frost resistance Pass: After 2 hours of operation at -42°C, no deformation occurs in the pressure disk, vacuum disk, and seal ring. Full compliance with standard requirements. In the room temperature of 36 °C continuous operation 72 hours, action 10000 times, the pressure valve disc, vacuum valve disc and guide rod contact surface without any signs of wear and bumps, guide rods rise and fall is not sensitive to stuck.

Maintenance and repair To ensure the performance of the new all-weather breathing valve is fully used. Breathing valve for inspection and maintenance in six months.

1. Check whether the pressure valve disc and the vacuum valve disc are flexible and whether the guide rod valve ring is in contact or not.

2. When re-installing the pressure valve plate, it is ensured that the contact surface should be tight and the guide rod should be raised and lowered flexibly.

3. When activating a new breathing valve, the shockproof material between the discs must be removed.

Operating pressure: Class A positive pressure: 355Pa (36 inches water column) Negative pressure: 295Pa (30 meters water column)

Class B positive pressure: 980Pa (100m water column) Negative pressure: 295Pa (30m water column)

Class C positive pressure: 1765Pa (180m water column) Negative pressure: 295Pa (30m water column)

*GFQ all-weather breathing valve *GZW-I detonation flame pipe flame arrester *QZF-89 all-weather fire-resistant aluminum alloy breathing valve *QHXF-89 explosion-proof breathing valve