3 tightening torques, 1 tightening torques for hexagon nuts (bonnet), 2 tightening torques for hexagon nuts (plug) – ARI Armaturen STEVI 451 EN User Manual
Page 19: 3 tightening torques for seat rings, 0 troubleshooting, Refer to item 7.3.), Rques refer to item 7.3.)
Rev. 0040306000 0410
Page 19
Operating and installation instructions
3-way control valves - STEVI
®
450 / 451
7.3 Tightening torques
7.3.1 Tightening torques for hexagon nuts (bonnet)
7.3.2 Tightening torques for hexagon nuts (plug)
7.3.3 Tightening torques for seat rings
Refer to operating and installation 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.
(Pos. 11, 29, 20.8)
M 10
=
15 - 30 Nm
M 12
=
35 - 50 Nm
M 16
=
80 - 120 Nm
M 20
=
150 - 200 Nm
(Pos. 4)
(Pos. 60)
M 10
=
50 Nm
M 10
=
35 Nm
M 12
=
85 Nm
M 12
=
60 Nm
M 16
=
180 Nm
M 16
=
140 Nm
M 20 x 1,5
=
360 Nm
M 20 x 1,5
=
270 Nm
(Pos. 2)
DN 15
=
150 Nm
DN 20
=
200 Nm
DN 25
=
215 Nm
DN 32
=
280 Nm
DN 40
=
400 Nm
DN 50
=
550 Nm
DN 65
=
840 Nm
DN 80
=
1170 Nm
DN100
=
1680 Nm
DN125 / 125v
=
1700 Nm
DN150 / 150v
=
2000 Nm
-
ATTENTION !
- It is essential that the safety regulations are observed when identifying faults.