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15 Annex
15.1 Tightening torques, lubricant and tools
15.1.1 Tightening torques
15.1.1.1 Body halves
When screwing the body sections together (1a and 1b), observe
the sequence of the screw connections and the tightening torques
for the respective nominal sizes.
Figure 15-1:
Sequence of the screw connections
EB 20a_EN
November 2023 edition
Subject to technical changes
Table 15-1: Tightening torques for body connections
Nominal size
Connection
DN 15
DN 25
NPS1
DN 40 / NPS1½
DN 50 / NPS2
DN 80 / NPS3
14 and 15
DN 100 / NPS4
15 and 16
DN 150 / NPS6
13 and 14
DN 200 / NPS8
15 and 16
Info
When these instructions are followed correctly, the sealing when
the medium fl ows through the control shaft as well as proper
function are ensured.
Infl uences such as pressure, temperature, as well as the use of
other PTFE material can lead to a change in these assembly in-
structions.
15.1.1.2 Flange connections
Table 15-2: Tightening torques for the DIN fl ange connections
DN
25
40
50
[mm]
MA
25
50
60
[Nm]
Table 15-3: Tightening torques for the ANSI fl ange connections
NPS
1
1½
[inch]
MA
15
30
40
[Nm]
Tightening torque
1 to 4
25 Nm
1 to 6
25 Nm
7 to 8
35 Nm
1 to 4
25 Nm
1 to 7
25 Nm
8 and 9
35 Nm
1 to 7
25 Nm
8 and 9
30 Nm
1 to 13
35 Nm
40 Nm
1 to 14
35 Nm
45 Nm
1 to 12
40 Nm
45 Nm
1 to 14
50 Nm
60 Nm
80
100
150
65
75
100
2
3
4
6
65
50
80
Annex
200
150
8
120
15-1
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