Vacon NX series, Maintenance Manual

Page: 61 / 64

Bolt tightening torque guidelines for metric flange connections with PP-V, PP-steel and PVC flanges
Nominal
diameter DN Pipe
diameter d
Number of
screws x thread
diameter
Bolt tightening torque (Nm)
Flat gasket up
to max.
pressure of 10
bar / 40°C Profile gasket
up to max.
pressure of 16
bar
O-ring up to
max. pressure
of 16 bar
15 20 4 x M12 10 10 10
20 25 4 x M12 10 10 10
25 32 4 x M12 15 10 10
32 40 4 x M16 20 15 15
40 50 4 x M16 25 15 15
50 63 4 x M16 35 20 20
65 75 4 x M16 50 25 25
80 90 8 x M16 30 15 15