HAMMELMANN B7.02502.0210, Operating Instructions Manual

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Troubleshooting Page 1 of 1 Chapter 8
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(Sterling Fluid Systems BV 2001)
8. Help in case of trouble
8.1 Use of trained staff
Trouble shooting must be undertaken only by appropriately trained personnel.
8.2 Symptoms, causes and remedies
Symptom Cause Remedy
Output too low - Back pressure too high. Check the plant for contamination.
Regulate anew the operating point.
- Pump or pipework, resp., not completely
filled. Vent and fill the pump as well as the
suction or inflow line.
- Suction lift too high or positive suction
head too low. Check the liquid levels, open the shut-off
valves on the suction side.
Clean the filters and dirt traps installed on
the suction side.
- Sealing gap too large because of wear. Replace worn parts.
- Wrong direction of rotation. Change the motor connection.
- Casing or suction line leaks. Replace the casing seal.
Check the flange connections.
Pump does not prime or only
intermittently - Pump casing, shaft seal, foot valve or
suction line leaks. Replace the casing seal.
Check the shaft seal.
Check the flange connections..
- Suction lift too high or positive suction
head too low. Check the liquid levels, open the shut-off
valves on the suction side.
Clean the filters and dirt traps installed on
the suction side.
- Loose or jammed parts in the
pump. Open and clean the pump.
Pump leaks - Casing bolts not correctly
tightened. Check the tightening torque of the casing
bolts.
- Mechanical seal leaks.
Check the seal surfaces and elastomere of
the mechanical seal. In case of damages
exchange mechanical seal.
- Stuffing box leaks. Check the condition of the stuffing box. If
possible, retighten the stuffing box, if not,
replace it.
- Seals defective. Replace the seals.
Temperature of the pump
increases - Pump or pipework not completely filled. Vent and fill the pump as well as the
suction line or inflow line.
- Suction lift too high or positive suction
head too low. Check the liquid levels, open the shut-off
valves on the suction side.
Clean the filters and dirt traps installed on
the suction side.
- Stuffing box overtightened. Loosen the stuffing box.
- Pump is run against closed valve. Open the shut-off valve on discharge side.
Pump runs noisily - Pump or pipework not completely filled. Vent and fill the pump as well as the
suction line or inflow line.
- Suction lift too high or positive suction
head too low. Check the liquid levels, open the shut-off
valves on the suction side.
Clean the filters and dirt traps installed on
the suction side.
- Pump is not properly levelled or is
distorted. Check the pump installation
- Foreign material in the pump. Dismantle and clean the pump.
Motor protection switch
switches off. - Pump is not properly levelled or is
distorted. Check the pump installation.
- Operating conditions outside of
performance range of pump. Refer to pump operating conditions stated
in technical data.
- Loose or jammed parts in the pump. Open and clean the pump.
HAMMELMANN Code no.: 04.03226.0769
Type 32-200