Why the use of discharge valve, discharge valve should have what function? Water by the water elevations of buried water pipe, water supply pump export and distribution pipe line, in order to improve the efficiency of water supply to prevent pipeline due to the negative pressure caused by broken tube (because usually dissolved in water have a certain air and air solubility decreases with increasing temperature, so the water cycle in the process of gas gradually separated from the water, and gradually gathered together to form large bubbles or air column, because of water added, so it is often produce gas. , should be installed discharge valve.

Three major functions of discharge valve:

1, when the pipeline is filled with water, a large number of discharge valve exhaust pipe to ensure that the pipe is filled with water without air, the discharge valve can be large and with sufficient water to match, can shorten the filling time.

2, in the pipeline operation stage, requires the discharge valve in the high pressure to trace the discharge valve, the release of the water release of trace air (about 2% of the volume), to prevent the accumulation of air in the pipeline to prevent the flow of water, improve the efficiency of water delivery.

3, in the stages of the pipeline emptying, discharge valve, a large number of Qi, prevent to produce negative pressure pipe, when requested discharge valve of the suction flow rate and pipe drainage volume matching, in pipeline local accident, because of the slope of the knife, water discharge great discharge valve quickly a large number of Qi, to prevent the pipeline due to the action of the negative pressure lead to a broken pipe.