Specifications

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5.7 Trouble Shooting.
NO FLOW
I
RREGULAR FLOW
U
NDER CAPACITY
P
UMP OVERHEATS
M
OTOR OVERHEATS
E
XCESSIVE ROTOR WEAR
E
XCESSIVE SEAL WEAR
N
OISE / VIBRATION
S
EIZURE
P
UMP STALLS ON START
UP
Causes
ACTION
INCORRECT DIRECTION OF ROTATION. REVERSE MOTOR.
PUMP NOT PRIMED. EXPEL GAS FROM SUCTION LINE / PUMP CHAMBER & PRIME.
INSUFFICIENT NPSH AVAILABLE.
PRODUCT VAPORISING IN SUCTION LINE.
I
NCREASE SUCTION LINE & STATIC SUCTION HEAD DIAMETER.
SIMPLIFY SUCTION LINE & REDUCE LENGTH. REDUCE PUMP
SPEED & PRODUCT TEMPERATURE.
AIR ENTERING SUCTION LINE. REMAKE PIPEWORK JOINTS.
GAS IN SUCTION LINE. EXPEL GAS FROM SUCTION LINE / PUMP CHAMBER.
INSUFFICIENT STATIC SUCTION HEAD. RAISE PRODUCT LEVEL TO INCREASE STATIC SUCTION HEAD.
PRODUCT VISCOSITY TOO HIGH. DECREASE PUMP SPEED / INCREASE PRODUCT TEMPERATURE.
PRODUCT VISCOSITY TOO LOW. INCREASE PUMP SPEED / INCREASE PRODUCT TEMPERATURE.
PRODUCT TEMPERATURE TOO HIGH. COOL PRODUCT / PUMPING CHAMBER.
PRODUCT TEMPERATURE TOO LOW. HEAT PRODUCT / PUMPING CHAMBER.
UNEXPECTED SOLIDS IN PRODUCT CLEAN SYSTEM / FIT STRAINER ON SUCTION SIDE OF PUMP.
DISCHARGE PRESSURE TOO HIGH CHECK FOR BLOCKAGES / SIMPLIFY DISCHARGE LINE.
ROTORCASE STRAINED BY PIPEWORK. CHECK PIPE ALIGNMENT / SUPPORT PIPEWORK.
PUMP SPEED TOO HIGH DECREASE PUMP SPEED.
PUMP SPEED TOO LOW INCREASE PUMP SPEED
SEAL FLUSH INADEQUATE INCREASE SEAL FLUSH TO REQUIRED PRESSURE / FLOW.
BEARING / TIMING GEAR WEAR REPLACE WORN COMPONENTS.