4. Pipe connectors
If your two-shaft Börger machine was delivered without pipe
connectors (with standard rectangular flanges on the inlet
and outlet), the appropriate pipe connectors must be attached
as follows:
Use:
—
Suitable flange screws
— Suitable spring washers to secure the flange screws
— Seals made from materials compatible with the medium
— O-ring seals must be used as standard, and are to be
installed in the O-ring groove of the rectangular flange
on the inlet/outlet.
Optionally, gaskets are also used, e.g. in the agricul-
tural sector.
5. Gradually tighten the flange screws used to install the pipe
connectors on the inlet and outlet crosswise so that the leak
tightness of the connection is guaranteed.
— Make sure that the seals and the spring washers are not
damaged and not to squeeze out the rubber gaskets
(NBR, EPDM, FKM).
Torque
O-ring seals and PTFE-based gaskets
M12 steel screws: 80 Nm
59 ft-lbs
M12 stainless steel screws,
Property class 70:
60 Nm
44 ft-lbs
The torque cannot be attained when using gaskets made of NBR, EPDM or
FKM. For these seals, gradually tighten the screws crosswise, however only
insofar that the seals are not squeezed out.
Transportation, Storage and Installation
BA-Classic FL_en-US, 03.05.2018 www.boerger.de / www.boerger.com 65
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