Wilo TOP-S Instrucciones De Instalación Y Funcionamiento página 38

English
WARNING! Risk of injury and damage to property!
The flange connection can be damaged and develop leaks if the pump is not
installed correctly. There is a risk of injury and damage to property due to hot
fluid escaping.
• Never connect two combination flanges to each other!
• Pumps with combination flanges are not suitable for operating pressures
PN16.
• The use of securing elements (e.g. spring rings) can result in leaks at the
flange connection. They are therefore not permitted. The washers supplied
(fig. 3, item 1) must be inserted between screw heads / nuts and the combi-
nation flange.
• The permissible tightening torques listed in the table below must not be
exceeded, even if screws of higher strength (
splintering can occur at the edges of the long holes. This causes the screws
to lose their preload and the flange connection can become leaky.
• Use screws of sufficient length. The screw thread must protrude at least one
thread turn beyond the nut (fig. 3, item 2).
DN 32, 40, 50, 65
Screw diameter
Strength class
Permitted tightening torque
Min. screw length for
• DN 32/DN 40
• DN 50/DN 65
DN 80, 100
Screw diameter
Strength class
Permitted tightening torque
Min. screw length for
• DN 80
• DN 100
• Install appropriate flat gaskets between pump and counter flanges.
• Tighten the flange bolts crosswise in two steps to the prescribed tightening
torque (see Table 7.1.2).
• Step 1: 0.5 x permissible tightening torque
• Step 2: 1.0 x permissible tightening torque
• Check the flange connections for leaks.
• Single pump:
Fit the two half-shells of the thermal insulation before commissioning and push
them together so that the guide pins engage in the opposite holes.
34
Rated pressure PN 6
M12
≥
4.6
40 Nm
55 mm
60 mm
Rated pressure PN 6
M16
≥
4.6
95 Nm
65 mm
70 mm
≥
4.6) are used, since otherwise
Rated pressure PN 10/16
M16
≥
4.6
95 Nm
60 mm
65 mm
Rated pressure PN 10/16
M16
≥
4.6
95 Nm
65 mm
70 mm
WILO SE 08/2020