The vertical no-sealing self-priming pump adopts foreign advanced hydraulic model,its efficiency is higher than the same category of other domestic companies for 30%.
This series of pump doesn't design suction pipe bottom valve, it can work by its own vacuum suction without filling liquid, self-priming height can reach 5~8 meters.
Flow rate : ~ 8000 m3 / h
Head : ~ 150 m
Working pressure : ~2.0 Mpa
Working temperature :~ 80℃
WFB self-priming pump without seal is mainly composed of pump body, working impeller (main impeller), auxiliary impeller, pump shaft, motor support, electric control valve, stop check valve and other devices. Working principle of gas liquid hybrid, before the pump is running, there is a certain amount of liquid in the pump body, pump starts, due to the rotation of the impeller, work is making the air and into the liquid pipe of liquid in the pump body mix, and have been to the gas-liquid separation chamber, gas liquid separation indoor air from the upper escape, fluid returning from the lower impeller imports, and again into the liquid pipe residual air mixing, cycle, until all the air in liquid into the tube row, complete the imbibition.
The principle of auxiliary impeller dynamic seal: the auxiliary impeller is in the upper part of the working impeller, which rotates together with the working impeller during operation. Its function is to reduce the pressure of the pump chamber, to achieve the balance of axial force and prevent liquid from entering the sealing device. Vice impeller is actually rely on pressure to withstand the high pressure of the impeller outlet leakage, when the vice impeller does not work, so should be equipped with stop sealing, to prevent the outflow of water pump chamber.
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