5 Installation at Site
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BOA-CVE C/CS/W/IMS/EKB/IMS EKB
5.4 Piping
WARNING
Impermissible piping forces
Leakage from or rupture of the valve body!
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Connect the pipes to the valve without transmitting any stresses or strains.
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Take constructional measures to prevent any piping forces from being
transmitted to the valve.
CAUTION
Painting pipes and actuator
Valve function impaired!
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Protect stem, plastic components and actuator elements prior to applying paint.
5.4.1 Flange connection
Fasteners
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.
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°.
Flange connection
DN 65 PN 10/16 (steel/steel):
DIN EN 1092-1 with DIN EN 1092-1:
Bolts through 8 holes
DN 65 PN 10/16 (steel/cast iron):
DIN EN 1092-1 with DIN EN 1092-2:
Bolt hole circle to DIN EN 1092-1 turned through
22.5°, bolts through 4 holes, 4 holes free
Fig. 6:
Flange connections
ü
The mating flange faces are clean and undamaged.
1. Use an appropriate tool to evenly tighten the fasteners crosswise.
5.4.2 Bolt lengths for flange connections
Connecting elements are needed to install a valve in a pipeline. These are bolts and
nuts. For BOA-SuperCompact fully threaded studs with nuts can also be used.
The bolts and nuts must be selected in accordance with DIN EN 1515-4 "Flanges and
their joints, Part 4, Selection of bolting". In order to ensure the correct installation of
the valve, the bolts and nuts must be made of the materials defined by this standard
as a function of pressure and temperature for use within the scope of the Pressure
Equipment Directive Pressure Equipment Directive (PED).
