21
Movitec V 2,4,6,10,15 & 90
10 Failures
10.1
Failure table
WARNING
Observe the general safety precautions
before install, maintenance and repair.
Problem
Possible cause
Possible solution
Checkpoints
Leakage along the shaft
Running surfaces of the
mechanical seal worn or
damaged
Replace the mechanical
seal.
Check the pump for dirt -
abrasive parts.
New pump: seal stuck due
to assembly
Open and close the outlet
shut-off valve quickly dur-
ing operation
mechanical seal mounted
incorrectly
Install the mechanical seal
correctly. Use water and
soap as a lubricant
Elastomers affected by
medium
Use the right rubber com-
pound for the mechanical
seal
Pressure too high
Use the right type of
mechanical seal
Shaft worn
Replace shaft and
mechanical seal
Pump has been operating
without water
Replace the mechanical
seal
Leakage along the shroud
at the top bracket or at the
pump foot
O-ring worn
Replace the O-ring
O-ring not resistant to the
medium to be pumped
Replace O-ring by an O-
ring with better resistance
Too much tension on the
pump foot; it becomes
oval
Decrease tension on pip-
ing
Mount the pump foot ten-
sionless
Support the connections.
Goodnal STP ST041 Disinfection & Outfall (KSB Service Water Pumps Pu-1030-010/020/030 OM Instructions) Vendor Manual
Q-Pulse Id VM404
Active 29/10/2013
Page 23 of 42
