Palmer-Bowlus Flume, P-40 = 2
( typically those manufactured by Warminster Fiberglass or Plasti-Fab )
» sized by pipe diameter, D. Enter value ( in units of P-1 ) into P-43.
» flume relief is trapezoidal
» designed to install directly into pipelines and manholes
» head is referenced to bottom of the throat not to bottom of pipes
» for rated flows under free flow conditions, the head is measured at a
distance of D / 2 upstream from the beginning of the converging section
» position the transducer such that it is centered over the flow at a
minimum height 30 cm ( 12" ) above the maximum head
D / 2, point of
measurement
side
plan
Q
0
head
PL-443 6 – 37
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