ITT GOULDS PUMPS 3316, Инструкции по установке, эксплуатации и обслуживанию

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3. Impeller diameters may be too small.
4.
Mechanical defects: Wearing rings worn. Impellers damaged. Casing gasket defective.
5. Wrong direction of rotation.
6. Be sure pressure gauge is in correct place on discharge nozzle of pump and not on top of casing.
6.4 Pump works awhile and then quits
1. Leaky suction line.
2. Stuffing box packing worn - 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 gauge.
7. Impellers plugged.
6.5 Pump takes too much power
1. Speed too high.
*1
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 box too tight.
• Pump and driving unit misaligned.
5. Wrong direction of rotation.
*1
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:
• Shaft bent.
• Rotating parts bind, are loose or broken.
• Bearings worn out.
• Pump and driving unit misaligned.
6.4 Pump works awhile and then quits
30 3316 Installation, Operation and Maintenance Instructions