Liquid flow rate measurement with Palmer-Bowlus

Liquid flow rate measurement with Palmer-Bowlus flumes
ASSUMPTIONS
The liquid flow rate measurement with Palmer-Bowlus flume and water rise method in circular
channels is based on the actual liquid level measured by the ultrasonic sensor (radar sensor,
optional) at the hydraulic structure converted into the value of flow ratio by the measuring
transducer.
The basic condition to apply the method is to provide free, undisturbed outflow of liquid
from the measuring flume.
APPLICATION
Palmer - Bowlus flume, in accordance with ISO 4359:1983 "Liquid flow measurement in open
channels. Rectangular, trapezoidal and U-shaped flumes” is one of the metering flumes
intended for flow measurement in ducts with gravity flow. It is recommended for circular
channels with gravity flow and unpressurized lines. The flume provides a close relation between
liquid level and flow rate in a duct or a pipeline.
FEATURES
→ optimum measuring accuracy of the flow rate
→ standard flume dimensions
→ easy installation in circular channels or pipelines
→ easy flume installation
THE FAMILY OF PALMER-BOWLUS FLUMES (dimensions in mm)
Diameter
DN
Nominal
flow rate
m³/h
B
C
D
Dw
PB 160
Ø 160
50
210
500
1000
155
PB 200
PB 250
PB 300
Ø 200
Ø 250
Ø 315
70
100
220
280
310
360
650
700
820
1400
1400
1450
190
235
300
PB 400
PB 500
Ø 400
Ø 500
450
730
500
550
1000
1100
1800
2100
380
475
PB 600
PB 800
PB 1000
Ø 630
Ø 800
Ø 1000
980
1700
4380
700
900
1050
1330
1670
2100
2400
2800
3500
590
787
960
Typ
zwężki
stu dzie nk a
p omi aro wa
(k in eta)
D
C
DN
B Dw
Na rysunkach poka zano is tot ne wymiary zwęż ki P& B
i spos ób inst alac ji cz ujn ika ult rad źwięk ow ego.
U WAGA ! W c elu uzyskania po praw nego pomiaru
natęż enia prz epływu , z wężka mus i być z ains talowana
w poz iomie, bez sp adku.
przykręcić
czujnik
ultrad źwiękowy
fabryczn y
uchwy t
czujnika
przykręcić
w ozn aczo ny m
mie jscu
zwężkę
instalo wać
w po ziom ie,
b ez spa dków
F
G
Rura DN1000
zwężkę lączy c z rurocią gie m
za pom oc ą nasu wek hy dra ul iczn ych
lub ki elichow
wykon a ć p odp arcie
zwężk i za pe wniaj ące
jej u n ieru ch om ien ie
Rura p ośrednicząca
DN800
Kielich u szcze lniaj ący
UAB "INTERAUTOMATIKA" Elnių 23-6, Vilnius, www.interautomatika.lt, tel. +370 5 2607810, +370 699 19725