VENTURI CHANNEL DEBITFLO - 755-01 Brochure

Flow rate measurementin open channelDEBITFLO04-11-2009 755 I1 01 LDEB755-01/1755- According to ISO 4359 - 10 ranges - From 7 to 2500 m3/h - Construction: composite material - Easier civil engineering - Options: Complete measurement system Logger and transmitter Inserted channel in PE module PRINCIPLE Manufactured Venturi channels are dedicated for flow rate measurement inopen flumes, and totalization on effluents. They are useful either on wastewater, contaminated fluid even with solids/ particles or chemically aggressi-ve. Venturi channel is a channel with a width narrowing. Correlation exists bet-ween flow rate value and the height of upstream fluid when the differenceof height between upstream and downstream is greater than 0.25 h. Flow rate calculation: Q = (2)3/2 v g Cv be he3/23Q : Flow rate [m3/s]Cv : (He / he)3/2b : Venturi width [m]h : Effluent height [m]The curve Q(h) is joined with each Venturi channel. DESCRIPTIONIn our standard models, you may choose between 4 types of instruments, allwith an ISO 4359 Venturi, with or without approach and tranquilization flumes.They are manufactured in reinforced polyester fibreglass for flow ratesfrom 2 to 2500 m3/h. For the smallest flow ranges, we can provide a PE module allowing aneasiest installation on site. For the greater flow rates we can provide just theVenturi channel, without approach and tranquilization flumes.Flow rate measurement in open channelVENTURI CHANNEL DEBITFLO(DF20A)DF7A, complete open channelwith PEHD integration housingDEB755-01/2Flow rate measurementin open channelDEBITFLO04-11-2009 755 I1 01 L755CODE NUMBERS AND REFERENCESNOTES According to requirements installation, theaccuracy is ±2% or ±3% of the reading betweenthe higher and lower limits specified for eachchannel. The error between 0 and the minimal flow ratevalue corresponds to ±2% or ±3% of the lowerflow rate value. Venturi channels accept an overflow rate withno risk of overflowing.The higher heights of fluids are rough valuesindicated for an easy model selection. Code Model Max flow rate Max flow rate h max Overflow B I Z L (A) L (C)Q l/s Q m3/h (mm) Q m3/h (mm) (mm) (mm) (mm) (mm)755 600 DF7A 1,9 7 96 9,3 100 200 185 1260 -755 602 AV07A 1,9 7,59 100 12 100 200 185 1260 -755 610 DF20A 5,3 19 122 22,4 100 200 205 1350 -755 612 AV25A 6,9 25 142 28,5 100 200 205 1350 -755 620 DF100A 27,8 100 285 111 150 250 356 2414 -755 630 DF250A 69,4 250 327 271 300 400 395 3583 1143755 640 DF500A 138,9 500 398 548 450 550 470 4889 1495755 650 DF1000A 277,8 1000 545 1070 550 650 620 6253 1919755 660 DF1500A 416,7 1500 622 1621 650 750 705 7229 2161755 670 DF2500A 694,4 2500 621 2679 1100 1200 700 10117 2804*Note: smaller VENTURI DF7A, AV07A, DF20A and AV25A do not correspond to ISO 4359 on specified width of thethroat < 100 mm.DF7A and DF20A: their upstream flumes have a 20 mm raised bottom with a sided well measurement (allows the use of abubbling level transmitter). Venturi channel only, without flumeVenturi with integrated approachand tranquillization flumesDF1000A, DF1500A and DF2500A (length A) are delivered in three parts.Code Model755 635 DF250C755 645 DF500C755 655 DF1000C755 665 DF1500C755 675 DF2500CMeasurement well forDF7A & DF20A only