Technical data

19
Compressed Air Applications Manual | Selection of material and pipe system Compressed Air Applications Manual | Selection of material and pipe system
Product range
The BEKOFLOW
®
polybutene (PB)
pipe system is distinguished by a broad
range of pipes from d 16 to d 110, coiled
or in straight lengths, including fittings
and outlet connectors.
Installation of the BEKOFLOW
®
system is
greatly facilitated by the resistance weld
fittings (couplings, elbows, tees, etc.)
with their product-coded plug-in con-
nections and the uncomplicated welding
tool.
Resistance welding method
During resistance welding, the pipe and
overlapping fitting are welded together
without the use of any additional sub-
stances. The heat required for welding
is generated through resistance wires
embedded in the fitting.
A controlled supply of electrical energy
is provided by the HWSG-3 welding tool.
The welding pressure required for the
welding process is achieved through
appropriate dimensioning of the BEKO-
FLOW
®
resistance weld fittings in relation
to the BEKOFLOW
®
pipes.
General requirements
BEKOFLOW
®
resistance weld fittings
made of polybutene (PB) are suitable for
operating pressures up to 16 bar at 20 °C
(PN 16) and 10 bar at 70 °C.
The installation of the BEKOFLOW
®
sys-
tem offers a number of advantages:
• no preparation of pipe ends
• no moving out of alignment of pipes
• during installation
• no holding devices required
• simple, functionally and operationally
• safe cable binding
• well visible marking and welding
• indicator.
For fixing the screws during pipe as-
sembly, the following torques have to be
observed:
d16 and d20 1 Nm
d25 to d40 1.5 Nm
d50 and d63 1.5 to 2 Nm
d75 to d110 2.5 to 3 Nm
These values relate to a temperature of
approx. 23 °C.