Ventilation butterfly valve leakage rate
Thread Content
The leakage rate of the ventilation butterfly valve is 1-5 percent. But how is this leakage amount calculated?
There are corresponding industry standards for the leakage rate of valves. Some data are obtained through experiments rather than being calculated using specific formulas
1. Ordinary butterfly valves generally lack valve seats or have low sealing precision for these seats; in particular, it is difficult to achieve a precise seal in the area where the rotating shaft of the valve disc contacts the valve body, so leakage is inevitable. 2. In the area where leakage occurs, the amount of leakage increases as the pressure difference between the two sides of the valve disc increases. Even ventilation butterfly valves have such pressure differences, so only a range can be specified. 3. The amount of leakage can be calculated using orifice plates or through software simulations, and actual measurements can be carried out if conditions permit