Installing A Threaded Pipe Union Pump; Installating A Flanged Pump - Wilo Stratos Notice De Montage Et De Mise En Service

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7.1.1 Installing a threaded pipe union pump

• Install appropriate threaded pipe unions before installing the pump.
• Use the supplied flat gaskets between the suction/pressure ports and threaded
pipe unions when installing the pump.
• Screw union nuts onto the threads of the suction/pressure ports and tighten
them using a suitable open-end wrench or pipe wrench.
CAUTION! Risk of damage to property!
Do not hold the pump by the motor/module when tightening the screwed con-
nections. Apply the wrench surfaces to the suction/pressure port instead.
Pump type
Stratos 25/1-4(6, 8, 10)
Stratos 30/1-4(6, 8, 10)
Stratos 25(30)/1-12
• Check the threaded pipe unions for leaks.

7.1.2 Installating a flanged pump

Installation of pumps with combination flange PN6/10 (flange-end pumps from
DN32 up to and including DN 65) and flange-end pumps DN80/DN100.
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 / 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 (
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
• DN32/DN40
• DN50/DN65
66
Width across flats [mm]
Suction port
36
36
41
Nominal pressure PN6
M12
4.6 or higher
40 Nm
55 mm
60 mm
Width across flats [mm]
Pressure port
36
36
41
≥
4.6) are used, since otherwise
Nominal pressure PN10/16
M16
4.6 or higher
95 Nm
60 mm
65 mm
WILO SE 04/2016