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5 Installation at Site
Flanged connection (DN 65 - 150)
Fig. 6: Flanged-end valve in open position
When installing valves with nominal size DN 65 and above, make sure that the valve
is fully closed on the valve inlet side. A partially open position will affect the valve's
face-to-face length and interfere with the installation process. In addition,
unintentional shocks or impacts may damage the shut-off element.
Only use fasteners (e.g. to DIN EN 1515-4) and flange gaskets (e.g. to DIN EN 1514)
made of materials approved for the respective nominal valve size. Always use all
flange bolt holes provided when connecting the valve to the pipe. For details on
flange connections refer to the type series booklet and (ð Table 10) .
Table 10: Bolt sizes and lengths to DIN EN 1092-2 PN 10/16
DN
Quantity
65
4
80
8
100
8
125
8
150
8
The bolt lengths are specified without considering tolerances; they refer to the
installation of the valve in a pipe with a standardised steel mating flange to
DIN EN 1092-1.
NOTE
Exception: DN 65 PN 16
When using steel flanges to DIN EN 1092-1 in conjunction with cast iron valves with
flanges machined to DIN EN 1092-2, ensure that for nominal size DN 65 classed
PN 16 the mating flanges are fitted offset by 22.5°.
BOA-Control PIC
Thread size
Bolt length
M16
M16
M16
M16
M20
[mm]
55
60
65
65
70
21 of 36
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