Hot water and central heating pumps
Circulating pumps are installed in installations in order to increase the momentum momentum of the flowing liquid. This is achieved by an impeller driven by a motor, which in turn is mounted in the pump casing. The principle of operation of the pump is based on the pressure differences in the system. Operation of the impeller causes an increase in water pressure on the discharge side of the pump. At the same time, the pressure on the other side of the pump decreases, creating the effect of suction of the next batch of water. There are glandless and glandless pumps. In the former, the motor is separated from the flowing liquid, as opposed to the glandless pump.