Wilo Stratos MAXO Notice De Montage page 19

en
5.4.2 Flange-end pump installation
130
Installation
Fig. 13: Opening shut-off devices
5. Open the shut-off devices in front of and behind the pump.
6. Check impermeability.
WARNING
Hot surface
The pipes might be hot. There is a risk of injury due to burns.
▪ Wear protective gloves.
WARNING
Risk of injury and scalding due to improper installation!
The flange connection can be damaged and develop leaks if the pump is not in-
stalled correctly.
▪ Never interconnect two combination flanges!
▪ Pumps with combination flanges are not permitted for operating pressures PN 16!
▪ The use of securing elements (e.g. spring lock washers) can result in leakages at the
flange connection. They are therefore not permitted. Use the washers supplied (scope
of delivery) between screw heads/nut heads and the combination flange!
▪ The permissible tightening torques listed in the table below must not be exceeded,
even if screws of higher strength (≥ 4.6) are used, since splintering may otherwise occur
at the edges of the long holes. This may cause the screws to lose their prestress and
leakage can occur in the flange connection. Risk of scalding!
▪ Use screws of sufficient length. The screw thread must project by at least one pitch of
screw thread from the screw nut.
▪ Perform leakage test at maximum permissible operating pressure!
Screws and tightening torques
Flange-end pump PN 6
Screw diameter
Strength class
Tightening torque
Screw length
Screw diameter
Strength class
Tightening torque
Screw length
DN 32 DN 40
M12 M12
≥ 4.6 ≥ 4.6
40 Nm 40 Nm
≥ 55 mm ≥ 55 mm
DN 65 DN 80
M12 M16
≥ 4.6 ≥ 4.6
40 Nm 95 Nm
≥ 60 mm ≥ 70 mm
DN 50
M12
≥ 4.6
40 Nm
≥ 60 mm
DN 100
M16
≥ 4.6
95 Nm
≥ 70 mm
WILO SE 2018-11