Start deep well submersible pump, should be smooth rotation, no vibration and abnormal sound, observe the motor running current and line voltage before and after the start of any significant fluctuations. Pay attention to the first installation or maintenance after the operation of the submersible pump, test machine can only start on the ground in order to observe, if found submersible pump abnormalities, should immediately stop, check the direction of rotation is correct, the installation is appropriate, find the reasons after troubleshooting run. Lifting should pay attention to protect the cable to prevent damage, the lifting device (such as tripod, hoist or electric hoist, etc.) should be greater than the weight of the submersible pump, and leave enough room. Before the hanging of the artificial rotation of the impeller to check whether the rotation is flexible, the main contactor contact contact is good, cable and cable joints with or without rupture, abrasion marks, motor shell grounding is reliable, and check the three-phase circuit with a multimeter line conduction.
According to the pump selection principle and selection of basic conditions, the specific operations just as follows:
1.According to the arrangement, terrain conditions, water level conditions, operating conditions of the device, determine to select horizontal, vertical, or other type (pipeline, submersible type, non-clogging type, self-priming, gear, etc.) pump.
2.According to the nature of the liquid medium to determine the washing machine, hot water pump or pumps, chemical pumps or corrosion pump or trash pump, or the use of non-clogging pump. Pump installed in the blast area should be based on grade explosive areas, with the corresponding explosion-proof motor.
3.According to the size of the flow to determine the menu suction pump or double suction pump; according to head level, to choose menu-stage pump or a multi-stage pump, high speed pump or low speed pump (air conditioning pump). The efficiency multi-stage pump is lower than the single-stage pump. If menu-stage pump and multi-stage pumps both can be used at the same time, the first choice is single-stage pump.
4.Determine the specific type of pump: When determine the series of the pump, you can press the maximum flow rate,take 5% -10% margin to enlarge after lift the two main parameters of performance in the series or type spectrum characteristic curve to determine the specific type