Agricultural small submersible pumps, rural solve farmers a major production and living water and irrigation water equipment, but because many of the submersible electric pump manufacturers, technical strength gap is bigger, the product quality. So if you want to choose a pump with reliable quality, the price is cheap, must be from the following several aspects: 

 

1, the manufacturer's option 

 

Choose submersible pump, first to realize the pump manufacturer, it is recommended that give priority to buy water filling type submersible pumps, pump when first to see the brand and product certification, don't buy "3 without" product, namely no manufacturer, production date, production license. Otherwise there is a problem, the user will do. 

 

2, single phase or three phase pump selection 

 

Should be according to the local power supply situation to determine with single phase or three phase pump, where a three-phase power supply generally should choose the three-phase pump. This is because compared with specifications of the single-phase and three-phase pump, three-phase pump light, small volume, light weight, vibration so choose three-phase pump is more economic. 

 

3, the determination of pump parameters 

 

Select the key is to determine the pump flow and head submersible pump such as parameter. Pump flow to choose, and water inflow and water consumption, and family economic conditions, to specific treatment. Head needed by the users the best choice and the pump head close to on the card, can use economic, to achieve the highest efficiency. But not require absolute equal, general deviation less than 20% can be compared under the condition of energy conservation work. If the selected pump head is too small, low lift pump for high head work, namely "small mara carts", can even pumping water, the water also will be small; Pump head is too high, high lift pump used for low head work, namely the "big horse-drawn cart", there will be superfluous at runtime, motor overload, if the long run, the motor temperature, winding insulation will gradually aging, and even burning motor. 

 

4, water pump quality inspection 

 

Submersible electric pump motor has a water filling type, oil filled type and block type structure, the general water filling type most widely used. This pump before use, must be all the two injection hole bolt screw, a water injection (no water), another discharge air, need to wait for 15 minutes after water injection, such as motor chamber air all add water after discharge, until filled with water before the two water injection to tighten bolts. The motor in the sealing state. Motor after water filling, winding work in water, but the motor insulation measurement, measuring insulation resistance must use megohmmeter shaking table, not using the multimeter, because the multimeter range is limited, for winding and the insulation resistance test is not clear. Insulation after passing for commissioning test pump. Conditional place, filled with water inside the motor, tighten bolts water flooding, the pump can be energizing test run within the pool, but not for a long time, no conditions to do idling in inoue, but no more than three seconds. 

 

5, buy location choice 

 

Be aware that approved by the department of agricultural machinery sales or store and ask for formal invoice, otherwise there is a problem, the user will not be able to solve.