NO FLOW
IRREGULAR FLOW
UNDER CAPACITY
PUMP OVERHEATS
MOTOR OVERHEATS
EXCESSIVE ROTOR WEAR
EXCESSIVE SEAL WEAR
NOISE/VIBRATION
SEIZURE
PUMP STALLS ON START UP
CAUSES ACTION
X
INCORRECT DIRECTION OF ROTATION REVERSE MOTOR
X
PUMP NOT PRIMED EXPEL GAS FROM SUCTION LINE/PUMP CHAMBER & PRIME
X X X X
INSUFFICIENT NPSH AVAILABLE
X X X
PRODUCT VAPOURIZING IN SUCTION LINE
X X X
AIR ENTERING SUCTION LINE REMAKE PIPING JOINT
X X X X
GAS IN SUCTION LINE EXPEL GAS FROM SUCTION LINE/PUMP CHAMBER
X X X
INSUFFICIENT STATIC SUCTION HEAD RAISE PRODUCT LEVEL TO INCREASE STATIC SUCTION HEAD
X X X X
PRODUCT VISCOSITY TOO HIGH DECREASE PUMP SPEED/INCREASE PRODUCT TEMPERATURE
X
PRODUCT VISCOSITY TOO LOW INCREASE PUMP SPEED/DECREASE PRODUCT TEMPERATURE
X X X X X
PRODUCT TEMPERATURE TOO HIGH COOL PRODUCT/PUMPING CHAMBER
X X
PRODUCT TEMPERATURE TOO LOW HEAT PRODUCT/PUMPING CHAMBER
X X X X
UNEXPECTED SOLIDS IN PRODUCT CLEAN THE SYSTEM/FIT STRAINER ON SUCTION SIDE OF PUMP
X X X X X X X
DISCHARGE PRESSURE TOO HIGH CHECK FOR BLOCKAGES/SIMPLIFY DISCHARGE LINE
X X X X X
ROTORCASE STRAINED BY PIPING CHECK PIPE ALIGNMENT /SUPPORT PIPING
X X
PUMP SPEED TOO HIGH DECREASE PUMP SPEED
X
PUMP SPEED TOO LOW INCREASE PUMP SPEED
X X X X X X
SEAL FLUSH INADEQUATE INCREASE SEAL FLUSH TO REQUIRED PRESSURE/FLOW
X X X X X X X
BEARING/TIMING GEAR WEAR REPLACE WORN COMPONENTS
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