China OEM Volute Pump - BNZ series Submersible Slurry pumps – Beken

Remarks: We have been OEM for many brands from Europe and USA

Sectional drawing

8、Inducer
To reduce the bending moment on the shaft, when it comes into contact with large particles, the Goodwin inducer is kept as close as possible to the lower bearing.

1、Bearings
Generously oversized to give extended life when pumping high specific gravity slurries.

6、Twin Volute Casing
To balance the load on the pump shaft, bearings and mechanical seal, Goodwin use a twin volute casing, reducing vibration and extending the life of all component parts especially the mechanical seal.

2、Cable
The cable has a double layer of waterproof insulation which is armoured with galvanised steel strands between the two layers of waterproof rubber and as such is much more resistant against damage. The IP68 rated cable gland seals against both the inner and outer sheaths, so even if the cable is damaged it is almost impossible for water to ingress to the electrical connections.

3、Rotor End Plates & Rotor Bars
The Goodwin pump uses high quality copper end plates and bars in their rotor that are brazed together where the melting point of the braze is 787°C. Goodwin chose this over aluminium end rings and bars as aluminium has a lower melting point of 507°C and is susceptible to porosity if die-cast leading to premature rotor failure under severe conditions.

4、Oil Filled Motor Housing
The Goodwin pump motor runs in a submerged oil bath that lubricates and cools the bearings and the mechanical seal. Additionally it transmits heat from the hottest part of the motor to the high mass stator housing that acts as a heat sink, eliminating motor hot spots which can give premature motor failure as would be the case if it was not oil filled.

5、Cooling of the Motor Housing
The Goodwin pump benefits from forced convection cooling by nature of the pumped fluid passing around the motor housing before it leaves the pump. This allows the pump to run for extended periods of time even if it is run dry in fresh air (when other pumps would overheat and burn out) or even if it is only semi-submerged without over heating. This is an integral part of the design and makes the option of additional motor cooling a redundant expense.