In a complete set of water supply equipment, whether it is a non negative pressure water supply equipment or a variable frequency constant pressure water supply equipment, as we all know, its pipeline fittings are equipped with
We seldom pay attention to it in use, only know that the current equipment is like this. Then we first understand the design principle of the pipeline. Of course, the principle of the pipeline fittings is basically the same whether it is a non negative pressure water supply equipment or a constant pressure water supply equipment. From the main inlet pipe, the water enters the butterfly valve, then the water pump, the water pump comes out the check valve, then the butterfly valve, and then the water comes out The main pipe, very simple check valve is generally installed at the outlet end of the water pump. What's the benefit of this? We know that the inlet end of the water pump is generally the natural pressure, and the non negative pressure water supply equipment is the natural pressure of the pipe network. After entering the water pump, the water pump operates to increase the pressure to the set pressure. At this time, the pressure at the outlet end is far greater than the pressure at the inlet end, which will form The pressure difference, if the check valve is not installed, the pressure at the outlet will return to the inlet end of the water pump, or even return, so the effect of pressure stabilization cannot be achieved. The frequency conversion operation of non negative pressure water supply equipment is pressure control. When the set pressure is reached, the equipment stops running, so as to achieve the effect of energy conservation. If there is no check valve, the pressure will not be stable, and the water pump of the equipment will not Stop the machine, so the check valve is very important in the whole set of equipment. In fact, our check valve sometimes has the phenomenon of pressure relief. Most of this situation is that the water quality contains sand or debris. If the contact surface of the check valve is jammed, the equipment can be operated several times, and the sediment and debris can be washed away. Therefore, the check valve is an indispensable part of non negative pressure water supply equipment.