Water pump front pump role?
(1) due to the lower speed of the front pump, the required pump inlet pouring height (ie, the calorification margin) is small, thus reducing the height of the deaerator installation, saving the construction cost of the main room;
Feed water front pump role: in order to improve the deaerator in the sliding operation of the economy, while ensuring the safe operation of the water pump, and the pump running in series.
(2) After the water is pressurized by the front pump, the outlet pressure is higher than the limited vapor pressure margin required for the feed pump and the additional vaporized pressure head at the small flow rate, effectively preventing the cavitation of the feed pump.
