Joining - LK Systems PE-X Assembly Instructions Manual

Cold bending with fixture
Pipe bending supports are recommended where
PE-X and PE-RT pipes are to be secured in bent
position and where the space requires small bend
radii. The product range includes a number of
different bend fixtures for e.g. connection of radi-
ators, installations against floor heating distribu-
tors or for pipe exits from walls.
Hot bending PE-X pipes
Hot bending is recommended if small radii are
required. The pipe must be heated using a hot
air gun, not a naked flame. The pipe is heated at
the bend location until it becomes colourless and
transparent. This occurs at a temperature of be-
tween 120 ºC and 130 ºC.
LK Bending springs are threaded outside the
pipe, which is then bent to the preferred angle.
The pipe is cooled in water or air, the bending
spring is pulled off and bending is complete. The
oxygen diffusion-sealing layer on the pipe is af-
fected during heating and bending, but this is
only of significance in terms of appearance.
Thanks to the thermal memory of the PE-X ma-
terial, a finished hot bend can easily be straight-
ened out again by reheating the pipe.
NOTE!
LK PE-RT and LK PAL pipes should not be
hot bent.
Bending of LK PAL Universal pipes
The bends are made by using a LK Bending
Spring (Bockfjäder) (up to 40 mm dimension) or
a LK Bending Tool (Bockverktyg) (up to 40 mm
dimension). Larger dimensions up to dim 75 can
be bent using special bending tools; contact an
LK representative.
LK Bending Spring INV, LK Bending Spring UTV, LK
Bending Tool 16-32 and LK Bending Tool PAL Multi 16-32.
Assembly instructions | LK PE-X, PAL and PE-RT pipes
Minimum recommended bend radii:
When bending with LK bending tools
When bending manually
Precautions must be taken when installing PAL
pipes at temperatures below -5 ˚C, particularly
when bending.

Joining

LK PE-X, LK PE-RT and LK PAL pipes for PN10
are joined with couplings as follows:
• LK PressPex press fitting coupling system.
See separate assembly instructions.
• LK Compression fittings.
See separate assembly instructions.
• LK PushFit couplings.
See separate assembly instructions.
Please note the choice of couplings for LK PE-X
and LK PE-RT, pipes intended for pressure class
PN6.
LK PressPex, LK PushFit and LK PI Tube adapter AX.
Example of jointing PE-X and PAL pipes using a LK PI
Tube Adapter.
4 x OD
5 x OD
EN.29.C.41.191217
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