TROUBLESHOOTING
Some of the following may help pinpoint the problem:
Pump does not pump:
►Lost its prime from air lead or low level in tank.
►Suction lift too high.
►Rotating in wrong direction.
►Strainer clogged.
►Bypass valve open, pressure relief valve set too low or pressure relief valve poppet stuck open.
►Improper end clearance.
►Pump worn out.
►Any changes in liquid, system or operation that would influence pump or coupling performance, e.g. new liquid, additional lines or process changes.
►Temperature changes either in the liquid or the environment.
►Magnetic coupling is decoupling. Change in application (temperature, pressure, viscosity,’ etc.) may require torque beyond coupling capabilities.
Pump starts, then loses its prime:
►Supply tank empty.
►Liquid vaporizing in the suction line.
►Air leak or air pocket in the suction line.
Pump is noisy:
►Pump is being starved (heavy liquid cannot get to pump fast enough). Increase suction pipe size, reduce length or slow down pump.
►Pump is cavitating (liquid vaporizing in suction line). Increase suction pipe size or reduce length.
►Check alignment.
►Magnetic coupling decoupled. Shut off and restart.
Pump not delivering up to capacity:
►Starving or cavitating - increase suction pipe size or reduce length.
►Strainer partially clogged.
►Air leak somewhere in suction line.
►Running too slow. Is motor the correct speed and wired up correctly.
►Pressure relief valve set too low, tuck open or has damaged poppet / seat.
►Bypass line around pump partially open.
►Pump worn out or too many gaskets.
Pump takes too much power (stalls motor):
►Liquid more viscous than unit sized to handle.
►System pressure relief valve set too high.
►Coupling misaligned.
►Bushings frozen up or liquid set up in coupling.
PUMP INFORMATION
Pump Model Number:
Serial Number:
Date Received:
Date Installed:
Distributor:
Contact Person:
Phone:
Fax:
Comments:
SECTION TSM 845 | ISSUE F | PAGE 13 OF 14 |
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