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First, there is no liquid supply, liquid supply and pressure are insufficient. This situation may be caused by the following failures:
1. First check if the pump is not filled with water or is not properly vented because the pump casing and inlet line are not filled with liquid.
2. Check if the speed caused by incorrect motor wiring is too low.
3. Check the head of the system for friction loss. 4. Check whether the net pressure head used by the fire pump is wearing. 5. Check the impeller and pipeline for obstacles. 6. Check if there is any error in the direction of rotation. The presence of cavitation in the inlet line or the presence of air leaks. 8. Check that the stuffing box is not properly lubricated. 9. Check that the correct bottom valve size is installed. 10. Check whether the immersion depth of the bottom valve or inlet pipe is up to standard 11. Check the impeller. Whether there is a gap between the clearance phenomenon 12, check the correct diameter of the impeller 13, check the position of the outlet nozzle or pipe pressure gauge is correct.
Second, the power consumption of the fire pump is too large and needs to be checked:
1. Check whether the direction of operation of the impeller is correct or not. 2. Check whether the wear gap of the internal components is abnormal. 3. Check whether the alignment shaft is bent. 4. Check whether the packing in the stuffing box is insufficient or not. 5. Check. Is there any excessive stress in the pump casing? 6. Check wear ring for correct running clearance
Detailed explanation of fire pump fault diagnosis
Fire pumps are now widely used in many fields. Although there are many applications, many people are still in trouble when they have some failures. The following Xiaobian makes a brief summary of some of its common troubleshooting.