Symptoms
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Possible Causes
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Solution
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the pump is not absorbent; pressure gauge and vacuum gauge pointer violently beating
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Injected into the water pump is not enough; pump or instrument leaks
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Fill the water pump again; tighten or plug the leak out
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the pump does not absorb water, the vacuum gauge shows a high degree of vacuum
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Water inlet pipe is not open or blocked; water absorption resistance is too large; water absorption height is too large to exceed allowable value
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Check the inlet pipe; clean or replace the suction pipe; reduce the water absorption heigh
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look at the pressure gauge water pump pressure, and the pump is still water
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Outlet resistance is too large; rotation direction is not correct; impeller blockage; pump speed is not enough
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Check or shorten the outlet pipe; change the motor steering; clean the impeller; increase the pump shaft speed
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traffic is lower than expected
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Pump blocked; too much wear on the seal ring; insufficient speed
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Clean the pump and pipe; replace the seal ring; increase the pump shaft speed
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the pump consumes too much power
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Gland packing too tight; impeller wear; pump water supply increased
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Loosen the packing gland or remove the packing; replace the impeller; adjust the gate valve to reduce the flow rate
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the pump in the process of abnormal sound, flow down until no water; balance device early wear and tear
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Gate valve open too much; suction pipe resistance is too large; there is air infiltration at the water absorption; excessive water absorption; the liquid temperature is too high
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Adjust gate valve to reduce flow; check suction pipe; check bottom valve; reduce suction height; tighten or plug leaks; reduce liquid temperature
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pump vibration
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Pump shaft and motor axis are not in the same center line
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Align pump with motor shaft centerline
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bearing overheating
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No oil or oil dirty; pump shaft and motor shaft is not a centerline
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Fill or change oil; align the shaft centerline
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