ITT Goulds Pumps 3405, Инструкции по установке, эксплуатации и обслуживанию

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3. Impeller diameter may be too small.
4. Mechanical defects: Wearing rings worn. Impeller damaged. Casing gasket defective.
5. Wrong direction of rotation.
6. Be sure pressure gauge is in correct place on dis charge nozzle of pump and not on top of cas-
ing.
*1 When connected to electric motors, check whether motor wiring is correct and receives full voltage.
When connected to steam turbines, make sure that turbine receives full steam pressure.
6.4 Pump works awhile and then quits
1. Leaky suction line.
2. Stuffing box packing worn - or water seal plugged allowing leakage of air into pump casing.
3. Air pocket in suction line.
4. Not enough suction head for hot water or volatile liquids. Check carefully as this is a frequent
cause of trouble on such service.
5. Air or gases in liquid.
6. Suction lift too high (suction pipe may be too small or long, causing excessive friction loss).
Check with switch gauge.
7. Impeller plugged.
6.5 Pump takes too much power
1.
*1
Speed too high.
2. Head lower than rating, pumps too much water.
3. Liquid heavier than water. Check viscosity and specific gravity.
4. Mechanical defects:
• Shaft bent.
• Rotating element binds.
• Stuffing boxes too tight.
• Pump and driving unit misaligned.
5.
*1
Wrong direction of rotation.
*1 When connected to electric motors, check whether motor wiring is correct and receives full voltage.
When connected to steam turbines, make sure that turbine receives full steam pressure.
6.6 Pump leaks excessively at stuffing box
1. Packing is worn or not properly lubricated.
2. Packing is incorrectly inserted or not properly run in.
3. Packing is not right kind for liquid handled.
4. Sleeves scored.
6.7 Pump is noisy
1. Hydraulic noise - cavitation, suction lift too high. Check with gauge.
2. Mechanical defects:
6.4 Pump works awhile and then quits
3405-3406-3416 Installation, Operation and Maintenance Instructions 35