The circulating pump is a conveyor device used to circulate water. It uses the rotating impeller to pass the mechanical energy of the leaves to the liquid due to the interaction between the blades and the liquid when working quickly to ensure that the pressure of the liquid is increased, and then the pumping liquid is reached. The purpose of the circulating pump is as follows:

(1) The circulating pump is started when the valve of the discharge pipeline is turned off. The starting power of the hot water circulating pump can reduce the startup power when the valve is opened.

(2) The circulating pump generally has self -suction capacity, but it is necessary to ensure that the impeller has water to enter to achieve the self -absorbing effect.

(3) After the cycle pump work is stable, there is no pulsation between continuous transportation flow and pressure.

(4) The raising of the circulating pump at a certain speed has a certain specified value. The working point flow and axis power depends on the situation of the device system connected to the circulating water pump. The raising of the circulating pump will change with the changes in traffic.