Re-Assembly; Motor; Tightening Torques - Samson NESE Manuel D'installation Et Mise En Service

ENGLISH
Note!
loose inner ring
Use m andrel for assem bly
13. Pull out with care the stationary seat of the mechanical seal from the
bearing bracket housing 33.00.
14. Remove vent fitting 74.10, greasing nipple 63.60, O'Ring 41.20 and
the mechanical seal housing 48.70. Remove the foot 18.30.
The mechanical seal housing should be forced out.
9.3.2 RE‐ASSEMBLY
Refer to tightening torques table for screws and bolts..
Never use grease : EPDM seals inside!
All pump parts should be cleaned before assembly. Silicon based
lubricant, glycol, glycerin or water with soap can be used to ease
assembly of O'Ring. Don't add lubricant on flat gaskets.
1. Assemble bearing bracket.
2. Assemble the shaft. Add grease into the ball bearing (Klüber
Microlube GL 261).
3. Fit the mechanical seal stationary seat into bearing bracket 33.00.
4 Install shaft assembly in the bearing bracket housing 33.00 and fasten
the cover 36.00 with its screws.
5. Fit rotating part of the mechanical seal 43.30 onto the shaft sleeve
52.30 and slide it onto the shaft.
Markings done during dismantling will help to find back the right
position of the seal.
Tighten mechanical seal stop screw and sleeve screws when mechanical
seal is positioned to previous location (use thread locking paste) or see
the table below.
Mechanical seal
SIC/CARBON/EPDM
Shaft dia.28
Shaft dia. 38
92.21
32.10
93.11
52.50
Size a Size b Size L
1
159,5 15 50
233,5 17 52,5
6. Fasten mechanical seal housing 44.10 on the intermediate flange
15.20. Locate outer rib as indicated below :
7. Add the flat gasket 40.01 on the intermediate flange 15.20 and
assemble it with bearing bracket 33.00.
8. Slide spacer rings 52.51, sleeve 52.90 and spacer ring 52.51 onto the
shaft 21.00.
9. Put the gaskets 40.00 and 40.02 on the intermediate flange and
assemble it with casing cover 16.10 with care. Internal flushing hole
should be positioned vertically (12h).
10. Press the key 94.01 in the shaft and slide the impeller 23.00 onto the
shaft. Use Molykote G paste to ease impeller assembly. Add washer
93.10 and tighten nut 92.20.
Never use a mallet during assembly : carbide bearing inside !
11. Install the casing seal 40.00 in the casing 10.20 and assemble back‐
pull‐out assembly with casing. Screw the vent fitting 74.10 with its
gasket 41.10.
9.3.3 MOTOR
In order to ensure an optimum lifetime of the integrated motor a
minimum maintenance is necessary : clean cooling fins regularly, check
coupling alignment (if any), check cable gland tightening, ...
Ball bearing lifetime depends on axial and radial forces applied on motor
shaft therefore on the pump design (close‐coupled pump, pump sets
with elastic coupling, ...).
Motor can be fitted with lifetime lubricated ball bearings (identified ZZ
or 2Z) or greased. Greasing nipples are located at the ball bearings and
re‐greasing quantities are indicated on motor nameplate.
See motor instructions manual to find data about maintenance work to
be performed.
9.4 TIGHTENING TORQUES
Tightening torques depend on the material used in the assembly and on
the type of lubricant that is used.
Refer to applicable regulation to know the tightening torques for
the fastening of cast iron or stainless steel made flanges. The
values given below should be only indicative. If real tightening torques
are required please ask our technical services.
Stainless steel bolts : apply anti‐fretting paste before assembly.
Tightening torque for back cover fastening nuts 92.00 :
16
Threads Tightening torques
M6 8,5 Nm
M8 12 Nm
M10 25 Nm
M12 40 Nm
M16 90 Nm
M20 175 Nm
M24 300 Nm
M30 500 Nm
M36 700 Nm
Thread Tightening torque
M12 65 Nm
M16 130 Nm