Torques; Installation Instructions - Grundfos SRP Installation And Operating Instructions Manual

6.2 Torques

All nuts and screws used for the installation must be made of
stainless steel.
Use grease (Alu-paste) together with a spring washer or lock nut;
otherwise, use Loctite or a similar product for lubrication and
locking.
All stainless-steel nuts and screws should be tightened to the
following torques:
Screws F-Class 70
[Nm]
M6 8.8
M8 21.4
M10 44
M12 74
M16 183
M20 370
When mounting the hub/impeller, use lock washer (pos. 1107),
and tighten the two shaft nuts (pos. 1106) to a torque of 50 Nm.
See fig. 6.
Shaft nuts on impeller shaft
Fig. 6

6.3 Installation instructions

See section 6.2 Torques and fig. 5.
1. Weld the connection flange to the cast-in pipe end in the tank.
2. Weld the profile section to the connection flange and pipe end.
Place it in position 12 o'clock.
Profile section on connection flange
Fig. 7
3. SRP.xx.80.xx: Weld the guide claws to the connection flange.
See fig. 8.
Position of guide claws
Fig. 8
4. Drill the holes for the mounting screws for the top fixation
5. Mount the screws and fit the top fixation bracket.
6. Depending on the length of the column profile, weld the
Screws F-Class 80
[Nm]
11.8
28.7
58
100
245
494
7. Position and align the column profile with the profile section on
1106
8. Remove the epoxy insulator and the turnable metal part by
9. Adapt the outside of the square epoxy insulator to the inside of
10.Place the column profile on the profile section on the
1107
11.Fit an intermediate fixation bracket to the turnable part welded
12.Drill the holes for the mounting screws for the crane foot in the
13.Mount the crane foot and fit and tighten the screws.
14.Mount the lifting wire (pos. 15) on the pump rack using the
15.Mount the top end of the safety wire to the hole (pos. 31) of
bracket in the concrete.
turnable part of an intermediate fixation bracket to the column
profile.
A
C
B
Top fixation
Fig. 9
the connection flange. Shorten the column profile (pos. 2) to
the correct length to match the position of epoxy insulator
(pos. C) at the top fixation bracket. A gap of 5 to 10 mm
between collar of epoxy and column profile is optimal.
See fig. 9.
removing the centre screw (pos. A) and the two fixation
screws (pos. B).
the column profile. The epoxy insulator must fit tightly inside
the column profile.
connection flange and mount the top end with the epoxy
insulator and the turnable metal part on the already installed
top fixation bracket. Tighten the three screws (pos. A) and
(pos. B) in the desired position.
on to the profile tube in step 6. Drill holes in the tank wall, fit
screws in the bracket and tightening the screws.
concrete.
shackle. See fig. 10.
Fig. 10 Mounting of lifting wire on the pump rack
the top fixation bracket by means of a shackle. The other end
of the safety wire ends in a shackle through which the lifting
wire must run.
31
11