K Factors; Terms Of Reference; Calculation Of K Factors (In Imp./L) For Saddles, Fusion Spigots, Welding Tabs Or Screw-Ons - Burkert S020 Manuel Utilisateur

Technicaldetails
6.4.

K factors

6.4.1.

Terms of reference

The K factors have all been determined under the following terms
of reference: fluid = water, water and room temperatures of 20°C,
minimum upstream and downstream distances respected, appropri-
ate pipe dimensions.
6.4.2. calculation of K factors (in imp./l)
for saddles, fusion spigots, welding
tabs or screw-ons
This calculation does not apply to T-fittings.
In addition to the terms of reference mentioned above, the K factors
for saddles, fusion spigots, welding tabs and screw-ons have been
determined as a function of the external diameter (d
wall thickness (s ) of the pipe given in the tables.
material
When the dimensions of your pipe are slightly different from dimen-
sions d and s given in the tables, recalculate the K factor using one
of the following formulae:
These formulae can only be applied if the dimensions of
your pipe vary by +/-5% compared with the theoretical
dimensions given in the tables.
Type S020
) and the
material
English
K = K
n
Fig. 6.14: Fitting used with a paddle-wheel flow sensor
K = K
n
Fig. 6.15: Fitting used with an electromagnetic flow sensor
K = recalculated K factor
n
K = K factor given in the table
t
d = D - 2s = theoretical internal diameter of the pipe
t material material
calculated using the values D
s
material
ting material (D
of the pipe and s
the pipe)
d = internal diameter of your pipe
n
d
2
t
x
t
d
2
n
d
2
n
x
t
d
2
t
and
material
given in the tables, for each fit-
= external diameter
material
= thickness of
material
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