Notes for 2 inch submersible deep well pump operation

When the 2 inch submersible deep well pump is running, you should make the following checks.

1) Inspect motor temperature. The temperature of motor shaft shall not surpass 95 centigrade degree, measured by thermometer. The temperature rise (resistance method) of motor stator winding shall not surpass 800 K, provided that the surroundings temperature is not higher than 40 centigrade degree and it is not higher than 1000m above sea level.   

2) Check the temperature of the shaft bearing of water pump  If there is no oil or too much oil inside the bearing cavity, the bearing temperature will rise.  The bearing temperature generally should not rise to more than 400 k above environment temperature. The maximum temperature of shaft bearing shall not be higher than 80 centigrade degree.  If neither temperature meter nor measuring instrument is available, you can feel the temperature with hand and make judgment according to your experience.  If the pump case feels roasting hot and your hand cannot stay on it even for seconds, you should stop the pump for inspection.  

3) If abnormal noise or vibration is detected during operation, you should stop the pump immediately for inspection. It can be started again only after the problem has been found and solved.  

4) Check if the bearing leaks oil. If so, deal with the trouble timely.    8) Don’t increase the rotation speed of the pump casually. Otherwise, accidents may happen because the pump doesn’t have enough mechanical strength. But you can decrease its speed, as long as its pressure and flow quantity meet site requirements.  

5) Keep an operation diary, including records of operation date, pressure, electric current, voltage, vibration, noise, bearing temperature, shaft seal leakage, failures and problem solutions, etc.

Notes for stopping the 2 inch submersible deep well pump

1) Before stopping the pump, turn off the sluice valve for water outlet first and then turn off the pressure meter. 

2) Return all control system, protective system, devices, instruments, meters and so on back to their original status. Note if anything is abnormal.  

3) If the power is cut off suddenly during operation, you should turn off the power supply switch and the sluice valve for water outlet immediately.