Installation, 2 torques and pressures flanged versions – KROHNE OPTIFLUX 7300 Quickstart EN User Manual
Page 13
INSTALLATION
2
13
OPTIFLUX 7300
www.krohne.com
01/2011 - 7312082200 - QS OPTIFLUX 7300 R02 en
2.6.2 Torques and pressures flanged versions
Tighten the bolts in fixed order, see picture:
• Step 1: by hand
• Step 2: approx. 25% of max. torque
• Step 3: approx. 50% of max. torque
• Step 4: approx. 80% of max. torque
• Step 5: 100% of max. torque given in table
EN 1092-1
WARNING!
Use stainless steel A2 / 6.9 class bolts.
INFORMATION!
Diameters DN80 and DN100 have 8 holes per flange, please continue in the same way to tighten
the other bolts.
CAUTION!
With the instrument, 4 PTFE sealing rings are included (2 to be used with installation,
2 as spare).
No other gaskets are required.
Nominal size
DN [mm]
Pressure
rating
Bolts
Max. torque
[Nm]
25
PN 40
4 × M 12
73.5
40
PN 40
4 × M 16
178
50
PN 40
4 × M 16
178
80
PN 40
8 × M 16
178
100
PN 16
8 × M 16
178