Burkert Type S020 - Manual (Page 37)

37
Installationandcommissioning
Type S020
7.2.7. installing a screw-on in plastic (pp,
pVc, pe)
G 1-1/2''
ø 45
→
Drill a hole 45 mm in dia-
meter in the pipe.
→
Thread to G 1 1/2’’.
G 1-1/2"
L
→
Screw on the spigot until it
reaches length L (see Table
23) corresponding to the
DN of the pipe so that the K
factors given in Table 22 are
respected.
→
Use an appropriate sealing
material (PTFE tape, for
example).
Internal pola-
rising slot
External
polarising
slots
α α
→
When L is reached, slightly
unscrew or continue to
screw until 2 of the 4 pola-
rising slots are aligned in
the axis of the pipe and the
oblong internal polarising
slot is positioned opposite
the flow direction.
Fig. 15: Installing a screw-on (PP, PVC, or PE)
dn of the screw-on
length l to be screwed (in mm)
pVc pp / pe
100 69,3
110 57,8 -
125 57,3 57
150 57,3 57
180 61,3 61,3
200 60,8 60,8
250 - 53,6
300 - 47,5
350 - 40,7
400 - 32,9
Table 23: Lengths L to be screwed to insert flowmeters 8020, 8024,
8025, 8026, 8041 and 8045, depending on the material
of the screw-on
English