The characteristics of the air valve: Multiblade wind valve and the vent pipe size regulate the rectangular duct; air valve leaves open the split rolls, ventilation, air conditioning and air purification system as a control valve; by testing, air tightness of the air valve, the relative amount of air leakage in 5%, good regulating performance.
As the name implies, namely air valve, air flow control valve, air valve is the central air conditioning terminal fittings ventilation and air conditioning and air purification of civil building engineering in an industrial plant, commonly used in air conditioning, ventilation pipe system, used to adjust the tube of the air flow, can also be used for mixing of fresh air and return air conditioning.
Generally, the smoke hood of Ji'nan is used in the air conditioning and ventilation system pipes to regulate the air flow of the branch pipe, and also can be used for the mixing regulation of fresh air and return air.
1. strength test, the test pressure is 1.5 times the nominal pressure, duration of not less than 5min, the valve shell, filler should be no leakage.
2. valve installation position, height, import and export direction must comply with the direction of the mouth; design requirements, the connection should be solid and tight.
3. tight test, the test pressure is 1.1 times the nominal pressure; test pressure in the duration of the test should remain unchanged, the time should comply with table 2, to the surface of the valve sealing surface leakage is qualified.
4. valves can be connected in various forms to the ends of the pipe. The most important connections are threaded, flanged and welded connections. If the temperature is more than 350 degrees when the flange is connected, because of the creep of bolts, flanges and gaskets, high temperature bolt material should be chosen.
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