Centrifugal pump before the start of the water filling method are mainly two: one is the end of valve assembly is filled with water, at the end of valve check valve, installed in the water inlet pipe of the import, the shortcomings of this approach is at the end of the valve head loss is large enough to affect the efficiency of pump device; the other a is no bottom valve is filled with water, the greatest advantage of this method is energy-saving, with respect to the bottom of the pumping station can be saving 10% ~ 15%. The following describes several centrifugal pump water filling method, for users to choose to run the pump.
Artificial filling method for the inlet diameter is less than 300mm of small pumping station, in the inlet pipe imports are usually provided with a bottom valve, the general use of the artificial recharge of water law, namely from the upper part of the pump shell special filling water exhaust hole by a water filled funnel (or a removed inverted bottle bottom of the ordinary bottles) filled with water. The inlet diameter is less than 300mm for a small pumping station, in the inlet pipe imports are usually provided with a bottom valve can also be from the pump outlet pipe mouth (short outlet pipe of the pump) to pump water filled. Because there is no need to purchase other water filling equipment, in the current rural small pumping station, the water filling method is common.
Not the end of the valve, a non-return valve and a shorter pipeline of small pumping stations can also be used to start the one hand, side from the mouth of the outlet pipe to pump water filled way, thus the pumps and pipes in the air is gradually carried out, the general continuous water filled a few minutes later, the pump can be normal pumping work.
