Suppose the liquid temperature range for the water pump is -20 .. 90 °C. However it should be worked under liquid temperature upto 180 °C. For this, what has to to be done?
YOu need to provide sufficient inlet pressure so that cavitation does not occur.
The pump will work well if it can increase head to 10 bar. Also, I think it will affect pump alignment, so you must determine hot alignment dimensions.
(edited) The physical size of the pumping arrangement was not described. I assume that the pump has all metallic components because of the high (194 F) 90degC design operating temperature. There may be some problem with an elastomeric bellows in a mechanical seal at the 180degC (356F) temperature. Other than that, there should be no problem with the temperatures as far as the pump is concerned. There may be a need for shaft cooling to protect the standard electric motor and possibly the flexible drive coupling arrangement. (edit) Depending on the physical size, rotating speed and drive arrangement, a special coupling set-up may be needed to accommodate any potentially wide swing in operating temperatures. From ambient to 180degC there will be about a 160C (288F) variation. The liquid will be either a salt or a glycol brine solution for freeze protection at the lower temperatures. (edit) That same concentration will provide some elevation of the boiling temperature and therefore a reduction of the pressure of the water solution needed to prevent boiling. ( 130 psig is the saturation pressure of plain water at that elevated temperature.) This can be found on the charts provided by the glycol suppliers for the various glycol and salt solution characteristics. To prevent cavitation you may need to pressurize the suction. If the proposed pressure of the system is already above the vapor pressure of the solution at that maximum temperature, you may already be OK. A motor with high temperature windings may be considered.
