EN-41
RDV - RGV - RCV
RBV - RNV - REV
VERTICAL PUMP
ENGLISH
RG
GRANDEZZA
GIOCO S [mm]
50-25, 80-20
0.65
65-25, 80-25, 80-31, 80-40, 100-20, 100-25, 100-31, 100-40, 125-25, 125-31,
125-40
0.8
RE
GRANDEZZA
GIOCO S [mm]
ALL THE SIZE
0.8÷1
8.2.7. BEARING BUSHES
Periodically verify the bearing bushes wear, particularly in presence of unusual vibrations and/or excessive noise. In order
to guarantee that bearing bushes work properly, verify that the radial clearance P, between the shaft sleeve and the
bearing bush, falls within the range of values shown in the chart below.
If this value goes beyond the suggested limits, the bearing bush must be replaced.
D
d
d
D
Middle bearing bush
Bottom bearing bush
BEARING HOUSING
TYPE
d
P = D - d
CLEARANCE
1
Middle
40
0.15
0.1
Bottom
33
0.15
0.1
2
Middle
45
0.15
0.1
Bottom
43
0.15
0.1
3
Middle
60
0.2
0.1
Bottom
53
0.2
0.1
Radial clearance values of bearing bushes
8.2.8. MECHANICAL SEAL
The mechanical seal does not require maintenance. Except for possible initial leaks after commissioning, the mechanical
seal on the shaft must operate without leaks.
Avoid dry operation
.
When a leak occurs which increases gradually, the seal must be replaced.
Periodically check that the working conditions of the flushes (where present) correspond to that indicated in APPENDIX A.
8.2.9. COLUMN LEVEL
After any maintenance operation, check that the supporting column holes are not clogged (execution A and B)
Check periodically and after every maintenance operation the correct level of medium in the column by the level rod
(execution E).
