Grundfos SE - Torques for Inlet and Outlet Flanges

4.7 Torques for inlet and outlet flanges
Grade 4.6 (5) galvanised steel bolts and nuts
Nominal
diameter
Pitch circle
diameter
[mm]
Bolts
[mm]
Torques
[Nm]
Slightly oiled Well lubricated
Inlet
DN 65 145 4 x M16 70 60
DN 80 160 8 x M16 70 60
DN 100 180 8 x M16 70 60
DN 150 240 8 x M20 140 120
Outlet
DN 65 145 4 x M16 70 60
DN 80 160 8 x M16 70 60
DN 100 180 8 x M16 70 60
DN 150 240 8 x M20 120 100
Specified tightening torques rounded off by ± 5 Nm Grade A2.50 (AISI 304) steel bolts and nuts
Nominal diameter
Pitch circle
diameter
[mm]
Bolts
[mm]
Torques
[Nm]
Slightly oiled Well lubricated
Inlet
DN 65 145 4 x M16 - 60
DN 80 160 8 x M16 - 60
DN 100 180 8 x M16 - 60
DN 150 240 8 x M20 - 120
Outlet
DN 65 145 4 x M16 - 60
DN 80 160 8 x M16 - 60
DN 100 180 8 x M16 - 60
DN 150 240 8 x M20 - 100
Specified tightening torques rounded off by ± 5 Nm
The gasket must be a full-face, reinforced
paper gasket, such as Klingersil C4300.
When using a softer gasket material,
reconsider the torques.
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English (GB)