ZPDG-type self-balancing multistage centrifugal pump is a new product introduced by Changsha Zoomlion pump. High efficiency and energy saving, ZLD self-balance multistage centrifugal pump completely overcomes the mechanical seal of old multi-stage pump Ring grinding surface failure due to poor contact, but also in actual operation, so that the drip does not leak. In the pump has passed ISO9001: 2000 quality system certification, product design, production and services have strict norms control system, product quality and adequate protection. Self-balancing multi-stage pump, open a hollow hole in the pump shaft, the pump shaft is located at the upper chamber of the balance drum with a through hole communicating with the hollow hole in the upper drum and the shaft of the balance drum, and a hollow hole seal at the top of the pump shaft , The hollow shaft at the bottom of the pump shaft communicates with the shaft return nozzle. With this structure, the pressure in the upper cavity of the balance drum is reduced through the improvement of the structure of the multistage pump, and the multistage pump transportation is solved without connecting an external relief pipe In the same time due to the elimination of the external pressure relief pipe, reducing production costs, and the appearance of the structure beautiful and generous; when the pump is running, balancing the pressure on the drum cavity, through the hole into the shaft Hollow hole, through the hollow hole to the water pump inlet to complete the purpose of pressure relief, reducing the pressure on the balance drum cavity, multi-stage pump axial force has been overcome, played a multi-stage pump self-balancing effect.
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