MST ZW, Operation

Page: 12 / 14

E
F
G
E. Screw out the fixing nut on the clutch and pull out
the clutch.
F. Remove the end cover on the bearing to remove both
pump shaft and bearing.
G. Take reversed sequences for assembly.
1. No water out of pump
2. Bigger noise and vibration
3. Insufficient water-out
quantity
4. Too big consumption of shaft
power
a. No or insufficient liquid stored inside of pump
casing
b. Air leaks from suck-in pipeline
c. Too slow speed
d. Too high suction travel or too long suck-in
pipeline
e. Too severe leakage from mechanical seal
f. Air inside of suck-in pipeline unable to be
exhausted from the outlet
a. Foot unstable
b. Pump shaft bent
c. Steam erosion
d. Bearing seriously worn out
e. Impurities exist inside of inlet pipeline
a. Impurities get into suck-in pipe or impeller geat
blocked up
b. Too slow speed
c. Impeller or impeller seal seriously worn out
a. Too heavy flow
b. Too quick speed
c. Pump shaft bent or impeller jammed or collided
d. The geat inside of the pump blocked-up or jammed a. Raise the outlet pressure
b. Properly lower it
c. Replace or correct
d. Get rid of blocking matters
a. Get rid of impurities
b. Adjust the speed to the rated one
c. Replace oral ring
a. Solidify it
b. Replace or correct it
c. Adjust working conditions
d. Replace it
e. Get rid of impurities
a. fill sufficient liquid
b. check and settle the air leak
c. adjust the speed
d. lower suction travel or shorten suck-in pipeline
e. repair or replace it
f. open the outlet valve to let air out
Failure Causes
Troubleshooting
09
ZW SELF-PRIMING PUMP