EJ Industrial Group Co.,Ltd is a leading professional valves manufacturer in China.
our main products line are for water system service which include cast iron and ductile iron gate, globe, check, eccentric plug, and butterfly valves. We provide both types of metal to metal seat and resilient seat.
Swing Check Valve,Resilient Seated Valve,Resilient Seated Check Valve,Resilient Check Valve EJ Industry Professional Valve Manufacture , https://www.ej-industry.com
　　
The reason: the water pump is not enough water, rotating the wrong direction, the impeller flow blockage.
　　
Remedy: Further injection into the pump, the impeller flow channel, adjust the rotation direction.
　　
2, insufficient pump flow
　　
Reason: part of the pump blockage, the number of revolutions is too low, the total head height above the pump rating, impeller damage.
　　
Reasons to exclude: cleaning pumps and pipes, replace the impeller, increase the pump shaft rotation, adjust the outlet valve.
　　
3, the reasons for the lack of export pressure and solutions
　　
Reason: There is air in the liquid, the speed is too low, the impeller is damaged and the outlet valve is opened too large.
　　
Reasons for the exclusion: to exclude the liquid air, increase pump speed, replace the impeller, adjust the small outlet valve.
　　
4, pump power consumption is too large (motor fever) cover
　　
Reasons: mechanical defects such as running clearance is too small, the motor shaft bending, bolts loose, the pump is too much flow in the work that pump is far below the rated head work.
　　
Reasons for the exclusion: Check the mechanical part of the timely adjustment process, adjust the outlet valve so that the pump in the vicinity of the rated flow and lift 5, the pump vibration.
　　
Reason: Poor piping system support, unbalanced impeller partially clogged, cavitation, and air in the liquid. Reasons for elimination: Check the support department, tighten the nut, and pass the impeller to balance it, removing the air.
　　
6, pump loopholes
　　
Cause: Mechanical seal damage, O-ring damage, pump body leakage.
　　
Remedy: Replace the mechanical seals and o-rings, welding pump body leakage.
　　
7, pump noise appears over the reasons and solutions
　　
Reason: bearing overheating lack of oil, pump overload.
　　
Reasons for exclusion: bearing refueling, according to 4 excluded.
Vertical Pipeline Pump Failure Reasons and Solutions
   1, the pump does not water