Centrifugal: Pump Problems And Solutions Pdf !link!

A centrifugal pump draws minimum power at shut-off (0 flow) and maximum power at run-out (high flow). If your amps are high, your flow is likely too high.

| Cause | Solution | |-------|----------| | No power supply | Check fuses, breakers, and disconnects | | Incorrect wiring | Verify wiring against diagram | | Thermal overload tripped | Reset overload; check for binding or high amps | | Seized pump internals | Manually rotate shaft; inspect bearings/impeller | centrifugal pump problems and solutions pdf

| Cause | Solution | | :--- | :--- | | (Seal faces run without fluid film) | NEVER run a centrifugal pump dry. Install a low-level cut-off switch. | | Galled faces (Thermal shock or abrasive solids) | Lap faces or replace seal. Install a API flush plan (e.g., Plan 32 for solids). | | Incorrect seal orientation (Spring direction wrong) | Review seal drawing. Ensure spring is facing the correct pressure side. | | Vaporization (Fluid flashes across seal faces) | Increase seal chamber pressure. Use a bypass from discharge. | A centrifugal pump draws minimum power at shut-off

| Cause | Solution | |-------|----------| | Air entrainment in suction | Submerge suction pipe deeper | | Vortex at suction bell | Install anti-vortex plate | | Leaking foot valve | Replace foot valve | | Leaking gasket on casing | Replace gasket; torque bolts properly | Install a low-level cut-off switch