Bamo DF 1000 A User manual

Flow rate measurement
in open channel
DF 1000 A
MESURES
22, Rue de la Voie des Bans - Z.I. de la Gare - 95100 ARGENTEUIL
Tél : [phone] - Web : www.bamo.fr
Fax : [phone] - E-mail : [email protected]
29-10-2008 755 M1 016 B
MES
755-16/1
II
IINN NNSS SSTT TTRR RRUU UUCC CCTT TTII IIOO OONN NNMM MMAA AANN NNUU UUAA AALL LL
VENTURI CHANNEL
VENTURI CHANNEL DEBITFLO DEBITFLO
Flow rate measurement in open channel
DF 1000 A
Nominal flow rate
1000 m3/h
According to ISO 4359

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755 M1 016 B 29-10-2008
1. DEBITFLO LOCATION
Please consider carefully all following requirement to choose a suitable location of the open channel DEBITFLO.
UPSTREAM SIDE SURROUNDINGS
To respect the minimum straight flow distance before the Venturi: the approach channel of the complete DEBITFLO is sufficient.
However, it is better to limit the slope of the input line at a minimal value.
In case the slope is too high, an undertow effect will be the consequence, visible in the channel. In this case, the complete system
will be operational only when the undertow (wave) is at a greater distance than 30 times the highest water height of the DEBITFLO
(see the flow rate table at 100%).
If the flow input line is not in the axis of the channel axe or through a valve, it is necessary to built up a longer approach channel.
When the approach channel width is lower than the input line, it is necessary to built up a restriction input line in order to avoid
turbulences.
The best solution is to set up a basin for tranquilization just before the approach channel, larger than the DEBITFLO and an
input flow through a vertical pipeline.
DOWNSTREAM SIDE SURROUNDINGS
The most important is to procure a free draining.
The DEBITFLO may never get a drop pressure back due to a bad drain off.
So, do not install a pipeline with a smaller diameter than the diameter of input line. Better to choose a really greater diameter and
to design it with the highest possible slope value
Never the height of downstream is over 80% of the upstream height.
The most convenient when it is possible is to let the flow output falling freely in a cataract way.
2. LEVELLING THE DEBITFLO
DIRECTION
- Install the DEBITFLO with its axis in the same axis of the flow.
RAISING
- The bottom of the channel should be at the height of the input line bottom.
LEVELLING
- Please use a bubble indicator to assure a perfect horizontal installation.

3. CARES FOR BEDDING
Before bedding the DEBITFLO in concrete, follow these recommendations to avoid any deformation inside the channel and
unbalanced channel parts.
- The strengthening pieces are sufficient to keep optimal all dimensions of the channel during stocking and transport.
- These strengthening pieces are not designed to resist with the pressure due to materials (concrete, sand, foams, etc.) during bedding.
- Therefore, it is necessary to adapt bracing device, internal wood struts to balance the pressure from bedding materials and avoid
restrictions/surface defects in the channel.
- Until all the materials are stabilized, dried, keep all the original strengthening pieces in place.
- Steel frameworks are of a good help for huge channels: drill into the external wood strengthening pieces to fix the channel to the structure.
- First bedding the ends of the channel and bottom of each strengthening pieces assure to keep a good position when filling is
done with sand or weak concrete.
No respect of these recommendations will cancel the manufacturer warranty.
UPSTREAM FINISHING
Coupling of DEBITFLO and input channel should be done of concrete, avoiding sudden changes of dimensions.
DOWNSTREAM FINISHING
Coupling of DEBITFLO and output line should be done of concrete, keeping a freely falling.
4. FLOW RATE TABLE
5. DIMENSIONS
The drawing is on the next page. Throat width b = 370.0 mm
Channel width B = 550.0 mm
Venturi length L = 1090.0 mm
Roughness Ks = 0.06 mm
Nominal temperature = 20.0 °C
Maximal height = 544.8 mm
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755 M1 016 B 29-10-2008
HEIGHT % HEIGHT mm FLOW RATE I/S FLOW RATE m3h
5,0 27 2,6 9,5
10,0 54 8,1 29,1
15,0 81 15,2 54,6
20,0 108 24,0 86,4
25,0 136 33,7 121,4
30,0 163 44,5 160,1
35,0 190 56,2 202,5
40,0 217 68,8 247,8
45,0 245 82,8 298,1
50,0 272 97,1 349,5
55,0 299 112,1 403,4
60,0 326 127,8 460,0
65,0 354 144,7 521,1
70,0 381 161,8 582,3
75,0 408 179,5 646,2
80,0 435 197,7 711,8
85,0 463 217,3 782,1
90,0 490 236,7 852,0
95,0 517 256,6 923,8
100,0 545 278,0 1000,8

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755 M1 016 B 29-10-2008
DF 1000 A Nominal flow rate 1000 m3/h
Overflowing rate 1070 m3/h
Acc. standard ISO 4359 VENTURI + approach channel
Construction: Fiber reinforced polyester
Roughness K = 0,06
Free fluid outgoing
Ultrasonic
level transmitter
FLOW STREAM
Mortar embedding Strengthening structure
Slope = 0