3 tightening torques, 1 tightening torques for hexagon nuts, 2 tightening torques for seat rings – ARI Armaturen STEVI 446 EN User Manual
Page 18: 0 troubleshooting, Refer to item 7.3.1.), Ues refer to item 7.3.2.)
Page 18
Rev. 0040301000 0410
Operating and installation instructions
Str. thr. control valves - STEVI
®
440 / 441, 445 / 446
7.3 Tightening torques
7.3.1 Tightening torques for hexagon nuts
7.3.2 Tightening torques for seat rings
! Refer to operating instructions for actuator concerned for
installing actuators !
8.0 Troubleshooting
In the event of malfunction or faulty operating performance check that the installation and
adjustment work has been carried out and completed in accordance with these Operating
Instructions.
If malfunctions cannot be eliminate with the help of the following table
“9.0 Troubleshooting table”, the supplier or manufacturer should be consulted.
M 10
=
15 - 30 Nm
M 12
=
35 - 50 Nm
M 16
=
80 - 120 Nm
M 20
=
150 - 200 Nm
M 24
=
340 - 410 Nm
DN 15/ 20
=
140 Nm
DN 25/ 32
=
205 Nm
DN 40
=
305 Nm
DN 50
=
460 Nm
DN 65
=
720 Nm
DN 80
=
980 Nm
DN100
=
1550 Nm
DN125
=
1700 Nm
DN150
=
2000 Nm
DN200
=
3300 Nm
DN250
=
3850 Nm
-
ATTENTION !
- It is essential that the safety regulations are observed when identifying faults.