Self-priming pump and centrifugal pump, submersible pump, submerged pump

principle of self-priming pump adopt unique patent impeller and separation plate of mandatory gas-liquid separation and completing the process of suction. Its appearance, size, weight, similar to pipeline pump efficiency. Vertical self-priming pump doesn't need hand pneumatic valve, vacuum valve, gas separator and other auxiliary equipment. Normal production start without irrigation fluid, strong self-priming capacity, can replace the current widespread use of submerged pump, Low liquid pump) , as a circulation pump, tank car pump, the suction pump and motor pump. Centrifugal pump:

centrifugal pump in conveying fluid, when the liquid level below, it is the water pump priming. Therefore need to be installed in the pump inlet position of valve. Over time, hand moving valve by corrosion or by screens, exchange or repair is needed, and so is not very convenient.
submersible pump:
submersible pump are used for conveying water, river water, and used in acid and alkali corrosive liquid such as transmission cases are prone to motor corrosion, leakage phenomenon, is not very safe. Pump were choked up with rubbish must pull the pump to clean up, is not very convenient, so is rarely used in practical application.
submerged pump:
submerged pump solves the problems of low transmission. But due to the long axis, combined with the impeller unbalanced radial force, the shaft to the cantilever structure, thus turns on the impeller end caused great deflection. The longer the shaft, the bigger the deflection. In order to solve this problem, in the shaft bearings are installed. But as a result of the shaft for the flexible shaft, continuing unilateral bearing wear, the wear quantity is bigger, bearing violent shaking, wear faster, so the submerged pump damage frequency is higher. And shaft for too long, generally are in meters. Submerged pump bearing is depend on medium for cooling and lubrication of the pump. If not pumping medium for refrigeration and bearing lubrication ( This kind of situation in the empty pump and imported by the clutter jams occur) Tile burning occurs, even burning motor. While submerged pump repair installation is very troublesome. Especially when transport corrosive medium without lifting tools it is difficult to complete.