Do you know the importance of Wilden Air Valve?
When filling the pipe with water, the faster the gas in the pipe is discharged, the faster the water filling speed; if the water pressure of the water filling is too high and the flow rate is too fast, the Wilden Air Valve will quickly seal the ball, which is prone to water hammer; During the drainage process of the pipeline, if the air is not sucked into the pipe through the Wilden Air Valve or the suction valve (vacuum breaking valve) in time, the drainage will not be smooth on the one hand, and negative pressure (vacuum formation) will easily occur on the other hand.
For commonly used pipes, this negative pressure is not harmful. If the rigidity of some pipes is insufficient, such as large thin-walled steel pipes, it is easy to cause deformation of the geometric shape of the pipes, resulting in water leakage failures.
There is usually a certain amount of gas dissolved in water, and the degree of dissolution of this gas varies with the temperature and pressure of the water. In the process of water delivery, some gas is also brought into the pipeline with the water flow, and these gases are mixed in the water flow and gradually released, accumulated at the top of the pipe, compressing the cross section of the water, and increasing the extra head loss during the water delivery process, so it must be timely. Excluded by Wilden Air Valve.
