Hot water well submersible pump orders should pay attention to what technical requirements

Hot water well submersible pump the most troublesome problem is the cavitation, the key is the choice of NPSH, plus cooling device is better, in addition to media, flow, temperature, there are pump head, especially the NPSH Requirements, because the hot water is easy to produce cavitation, using a mechanical seal or packing seal, the motor is an ordinary motor or household shape motor or explosion-proof motor, the pump seal is required to bring cooling water.
Should be concerned:
1, the implementation of the standard pump.
2, the pump NPSH.
3, the use of mechanical seals or packing seal, if the need for mechanical seal quench.
4, whether the need for cooling bearings.
5, the structure of the pump type.
6, the pump material