8 Fusion Operating instructions IM 160
32
Heating element butt fusion of PVDF
Fusion chart according to DVS 2207-15
Heating element temperature 240 °C 8 °C
1 2 3 4 5
Nominal wall
thickness
Equalize
Bead height on the
heating element after
equalization time
(equalization at
0.10 N/mm
2
)
Heat soak
Heat soak time = 10 x
wall thickness +40 s
(heat soak
≈ 0.01 N/mm²)
Change-over
Join
Fusion pressure build-
up time
Cooling
Cooling time at fusion
pressure
(p = 0.10 N/mm²
± 0.01)
Cooling time = 1.2 x
wall thickness + 2 min
mm mm (min.value) s s (max. time) s min (min.value)
1.9 – 3.5 0.5 59 – 75 3 3 – 4 5.0 – 6
3.5 – 5.5 0.5 75 – 95 3 4 – 5 6.0 – 8.5
5.5 – 10.0 0.5 – 1.0 95 – 140 4 5 – 7 8.5 – 14
10.0 – 15.0 1.0 – 1.3 140 – 190 4 7 – 9 14.0 – 19
Process steps for heating element butt fusion
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