The synchronizer gear is used to transfer the torque from the driving screw to the idler gear screw, so as to ensure that there is no metal contact and power transmission between the transmission elements. Therefore, the conveying element is highly reliable for any medium, and the pump will not be damaged due to dry in a short time.

The pump body adopts a round valve with special structure, which is opened when the outlet pressure is higher than the working pressure. Then, some medium will return to the inlet of the pump or storage tank through this annular valve. At the same time, the pump can be started under full pressure, thus greatly reducing torque.