What is the difference between booster pump and self-priming pump?

The first and two pumps can be pressurized, one is where the water level in the middle of the pipe is higher than the pump body (booster pump) and the other is where the water level in the middle of the pipe is lower than the pump body (self-priming pump), it is best not to be in the tap water pipeline Install a self-priming pump directly on the top, it may suck the glass of the water meter broken. Second, if the water is not cut off, the booster pump can be used. If the water is cut off frequently, a container (pool, water tank, etc.) must be prepared. The container can be equipped with a drain pipe and the booster pump can be used. The tube can only be equipped with a self-priming pump. The booster pump is equipped with a constant pressure device on the basis of the self-priming pump. That is to say, the water pressure in the water pipe can be maintained at a relatively average pressure, but because of the simple structure, it is not very useful to control, and it is easy to burn the water pump.