Armstrong 4030 Manual de instrucciones de instalación y funcionamiento - Página 10
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i nstal la ti on &
o p era t i n g i n stru ction s
10
symptoms
Bearings overheat
Stuffing box overheats
Pump delivery fails after start
Pump seized
Pump does not prime
Pump Noisy
Motor overloading
Series 4030
Base mounted pump
reasons
• Misalignment.
• Insufficient cooling to stuffing box.
• Badly packed stuffing box.
• Misalignment of pipework.
• Dirt in bearings.
• Bearings too tight.
• Bearings badly installed.
• Packing too tight.
• Insufficient cooling to stuffing box.
• Badly packed stuffing box.
• Misalignment of pipework.
• Suction line not filled.
• Air or vapour pocket in suction line.
• Inlet of suction pipe insufficiently submerged.
• N.P.S.H. available too low.
• Suction lift too high.
• Air leaks in suction line, gland or pump joints.
• Blocked suction.
• Impeller damaged.
• Pump not primed.
• Misalignment of pipework.
• Operation at low capacity
• Pump not primed.
• Inlet of suction pipe insufficiently submerged.
• Suction lift too high.
• Blocked suction.
• Incorrect rotation.
• Badly packed stuffing box
• Misalignment.
• Air or vapour in suction line.
• Inlet or suction pipe insufficiently submerged.
• N.P.S.H. available too low.
• Air leaks in suction line, gland or pump joints.
• Blocked suction.
• Impeller damaged.
• Operation at low capacity.
• Rotating element out of balance.
• Shaft bent.
• Poor foundations.
• Packing too tight.
• Operation at high capacity.
• Misalignment.
• Speed too high.
• Low system friction.
• Pumped liquid density is greater than anticipated.
• Packing too tight.