Burkert 2657 Instructions De Service page 16

Use only those adhesives which are suitable for joining PVC
products.
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After applying the adhesive, wait at least 24 hours before con-
ducting a pressure test.
7.2.2. heating element socket welding
(pp-h, pVdF)
Procedure:
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Chamfer the pipe ends by approx. 15°.
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Check outer diameter of pipe / inner diameter of the socket
according to the following table.
nominal width pipe
dn outer Ø
[mm] [mm]
10 16
15 20
20 25
25 32
32 40
40 50
50 63
16
socket
inner Ø
[mm]
15.85 ... 15.95
19.85 ... 19.95
24.85 ... 24.95
31.85 ... 31.95
39.75 ... 39.95
49.75 ... 49.95
62.65 ... 62.95
english
Type 2657
Installation
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Set the temperature controller of the welding equipment to
250 - 270 °C.
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Observe the warming-up time, welding time and cooling- down
time according to the following tables.
Leave the welded joints to cool down always at room
temperature!
Welding parameters
nominal pipe Minimum thickness
width outer
[mm]
dn Ø
[mm] [mm]
10 16 2.5 (PP-H) - 1.5 (PV DF)
15 20 2.5 (PP-H) - 1.9 (PV DF)
20 25 2.7 (PP-H) - 1.9 (PV DF)
25 32 3.0 (PP-H) - 2.4 (PV DF) 8 (PP-H) - 10 (PV DF)
32 40 3.7 (PP-H) - 2.4 (PV DF) 12 (PP-H) - 12 (PV DF)
40 50 4.6 (PP-H) - 3.0 (PV DF) 16 (PP-H) - 18 (PV DF)
50 63 3.6 (PP-H) - 3.0 (PV DF) 24 (PP-H) - 20 (PV DF)
Warming up time
[s]
5 (PP-H) - 4 (PV DF)
5 (PP-H) - 4 (PV DF)
7 (PP-H) - 8 (PV DF)