KROHNE OPTIFLUX 5000 Flange Quickstart EN - Manual (Page 12)

2
INSTALLATION
12
OPTIFLUX 5000
www.krohne.com 04/2011 - 7309872300 - QS OPTIFLUX 5000 FL R03 en
2.7 Mounting
2.7.1 Torques and pressures
DN15...100
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!
Please use "not lubricated" 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 gaskets are delivered (2 to be used with installation, 2 as spare). No
other gaskets are required.
Nominal size
DN [mm]
Pressure
rating
Bolts Max. torque
[Nm]
15 PN 40 4 × M 12 73.5
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