Dover Ebsray R75 Manuel d'installation, d'utilisation et d'entretien - Page 11
Parcourez en ligne ou téléchargez le pdf Manuel d'installation, d'utilisation et d'entretien pour {nom_de_la_catégorie} Dover Ebsray R75. Dover Ebsray R75 12 pages. Regenerative turbine pump
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Symptom
Possible cause
No Liquid
No power to drive shaft
Delivery
Coupling damaged or disengaged
Foreign matter in the pump
Ball Bearings seized
Inlet/Discharge valves closed
No liquid in supply tank
Incorrect direction of rotation
Strainer blocked
High static discharge pressure
Inadequate N.P.S.Ha
Pump vapour lock
Excessive
Foreign matter in discharge line
Power
Collapsed or kinked discharge hose
Consumption
Pressure, Viscosity, Temperature or
Speed not as per design conditions
Foreign matter jamming parts
Pump out of alignment with driver
Parts worn
End of service life or adverse
pumping conditions
Leakage
Seals incorrectly installed
from Pump
Excessive dry running or pump
O-rings nicked, cut or twisted
O-rings not compatible with liquid
Worn or damaged shaft in seal zone
Misalignment causing excessive
shaft distortion
Excess system pressure
O-ring failure
Fasteners not tightened to specified
torque.
Thermal expansion of product when
locked between valves either side of
pump
Excessive static pressure
Seal faces cracked, scratched, pitted
or dirty
SECTION 7 – TROUBLESHOOTING
Symptom
Possible cause
Reduced
Incorrect driver speed
Output
Faulty driver
Discharge piping restricted
Strainer blocked
Inlet piping too small or too long
Foreign object in suction line
External bypass pressure setting too low
End of service life or adverse pumping
conditions
Excessive
Foreign matter jamming parts
Noise
Parts worn
End of service life or adverse pumping
conditions
Incorrect driver speed
Faulty or incorrect size driver
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