MANUALE D’USO ROUTE - rev. 2 – 10/01
14
- opening and closing of the pump body
-
removal and replacement of rotating parts
10.4 WASTE
DISPOSAL
Materials: separate plastic from metal parts. Dispose of by authorized companies.
11 IMPROPER
USE
The pump must not be used for purposes other than the transfer of liquids.
The pump cannot be used to generate isostatic or counter pressures.
The pump cannot be used to mix liquids generating an exothermal reaction
The pump must be installed horizontally on a firm base.
The pump must be installed on a suitable hydraulic plant with inlet and outlet connections to proper suction
and discharge pipes.
The plant must be able to shut off the liquid flow independently from the pump.
Handling of aggressive liquids requires specific technical knowledge
12 OPERATING FAULTS AND POSSIBLE CAUSES
Pump does not deliver:
1. rotates in wrong direction
2. suction pipe is excessively long and tortuous
3. insufficient geodetic pump head or excessive suction geodetic lift
4. air infiltration into the suction pipe or branches
5. pump or suction pipe not completely covered by liquid
6. impeller channels blocked by impurities
7. check valve on discharge pipe jammed
8. geodetic system height is greater than maximum potential pump head
9. impeller jammed by considerable layer of crystals or by melting of materials for dry rotation.
10. bottom valve blocked by mud or other debris
11. bottom valve insufficiently immersed
12. bottom valve faulty, thereby causing suction valve to empty when pump stops
13. magnets release a much greater specific weight and flow rate of liquid than planned
Pump discharge rate or pressure insufficient:
see 01, 02, 03, 04, 05, 06, 10, 11, 12, 13
14. system's resisting head is greater than expected
15. suction pipe, closing valve and other items have an insufficient nominal diameter
16. small geometric pump suction head
17. damaged or worn impeller
18. liquid viscosity greater than expected
19. excessive quantities of air or gas in liquid
20. elbow joints, check valves or other items on the outlet port
21. liquid (especially if hot) with tendency to change into gaseous state
Pump absorbs too much power:
see 18
22. pump operates at greater capacity than expected
23. specific weight of liquid is greater than expected
24. impurities inside pump create abnormal wear
25. electric motor supply voltage is not rated voltage
Pump vibrates and is noisy
see 24
26. operates at full capacity (no head)
27. pump or pipes inadequately fixed
28. eccentric impeller operation because of worn bushes
Pump's internal parts wear out too quickly:
see 24
29. liquid excessively abrasive
30. recurring cavitation problems (see. 02, 15, 19, 17)
31. high tendency of liquid to crystallise or polymerise when pump is not operating.
32. pump made of materials that are unsuitable for pumped liquid
33. operation with capacity too reduced
