Design Data

Page 1 of 4

Benefits• Manufactured from high grade stainless steel.

• Configurationsavailabletosuitawidevarietyofinstallations.

• Simple installation.

• Self-activating.

• Nomovingpartsorexternalpowerrequirements.

• Low-cost,low-complexityflowcontrol.

PrecisionEngineeredOrificePlates1. Precisioncutstainlesssteelorificeplate(toapplicablesectionsof

BS EN ISO 5167-2:2003).2. Neoprene gasket.3. Fixingbolts.

The Hydro-Brake® Orifice is manufactured under strict QualityAssurance procedures to the stringent methods and tolerances set out in the international standard BS EN ISO 5167-2:2003.

Each Hydro-Brake® Orifice is manufactured to suit the precisehydraulicrequirementsoftheindividualapplication.

Figure 1 - The Hydro-Brake® Orifice flow control is designed and manufactured to deliver precise, repeatable flow control.

The Hydro-Brake® Orifice flow control is designed and manufactured in accordance with the applicable sections of BS EN ISO 5167-2:2003 to deliver precise, repeatable flow control.Ideallysuitedtositeswherethereareminimalon-sitestorage/attenuationconstraints,generousdischargeconsentsortheneedforalow-cost,low-complexityflowcontrolsolution.

CustomConfiguredAtHydroInternational,weprideourselvesonprovidingsolutionsthatmeetyourrequirements,ratherthanprovidingastandardsolutionandaskingyoutocompromiseonyourprojectneeds.TheHydro-Brake®Orificeisavailableinawidevarietyofconfigurationstosuitnumerousapplications–aselectionoftheseareshownbelow.Ifyoudon’tseeaconfigurationthatmeetsyourrequirements,contactourdedicatedprofessionalengineers,whowouldbehappytoworkwithyoutoprovidethebestpossiblesolution.

TheHydro-Brake®Orificecanalsobesuppliedpre-fittedwithininmanholetoallowforsimpleplug-and-playinstallationonsite.

Hydro-Brake®OrificePrecisionCutOrificePlateFlowControl

1

2

3

Integrated mesh guards

Curved mount pipe insert

Slide mounted

Push-fit spigot

Pipe end cap

Pivot mounted

Hydro-Brake®FlowControlSeries

Hydro-Brake® Hotline: 01275 337937

stormwater@hydro-int.com

hydro-int.com

Page 2 of 4

Design Data

Operating PrinciplesWhenitisnotsubmerged,theloweredgeoftheorificeactsasaweir.

Once the water level rises and submerges the orifice, thestandardorificeequationgovernstheflow.

Hydro-Brake®OrificePrecisionCutOrificePlateFlowControl

Unsubmerged Orifice (Weir) Low downstream

water level

Steep slope

Figure 2 - Typical unsubmerged orifice plate.

Figure 3(b) - Submerged flow.Figure 3(a) - Free flow.

Note:Wheretheorificedischargesasafreeoutfall,thentheeffectivehead,h,ismeasuredfromthecentreoftheorificetotheupstream(headwater)surfaceelevation(seeFigure3(a)).

Iftheoutlettotheorificeissubmerged,thenadifferentialheadistakenasthedifferenceinsurfaceelevationbetweentheupstream(headwater)andthedownstream(tailwater)(seeFigure3(b)).

Figure 4 - Typical head-discharge relationship.

Headwater

Tailwater

H

D

Headwater

TailwaterH

D

Hydro-Brake®FlowControlSeries

Hydro-Brake® Hotline: 01275 337937

stormwater@hydro-int.com

Page 3 of 4

Design Data

ExpertDesignSupportServicesHydroInternational’sprofessionalengineersworkwithyoutoprovideexperttechnicalandaftersalessupporttoensureyourprojectsmeetexactingdesignrequirementsanddelivertheverybesthydrauliccontrolsforyoursite.

Withover35years’experienceofflowcontrolknowledgeandexperience,HydroInternational’sdesignsupportteamisavailabletoadviseonanyaspectofwaterflowmanagement,includingdetailedmodellingoforificeplatesandcompositeouletstructures

ResiliencebyDesignHydro-Brake®Orificeplatescanbesuppliedwith integratedprotectionagainst the riskofblockages.Alternatively, theHydro-Brake®

Orificecanbemountedonmoveableorremovablestructurestoallowformanualinterventiontodrainthecontrolchamberfromsurfacelevelandclearanyblockagesthatdooccur.Ourengineerswillbehappytoadviseonthemostappropriateprotectionorinterventionstructure(s)foryourapplication.

Technical Details and Further InformationHydroInternationalwillsupplydetailedhydraulicdataanddimensionedinstallationdrawingsforeachunit.Exampledetailsareshownbelow.

Hydro-Brake®OrificePrecisionCutOrificePlateFlowControl

Hydro

Site Ref:

Control Points Flow (l/s) Head (m)Warning

Head (m) Flow (l/s)0 0.000 0.00

0.04 0.040 1.150.08 0.080 3.630.12 0.120 5.560.16 0.160 6.970.2 0.200 8.14

0.24 0.240 9.160.28 0.280 10.080.32 0.320 10.930.36 0.360 11.710.4 0.390 12.26

0.44 0.430 12.960.48 0.470 13.630.52 0.510 14.260.56 0.550 14.870.6 0.600 15.60

0.64 0.640 16.150.68 0.680 16.690.72 0.720 17.220.76 0.760 17.720.8 0.800 18.21

0.84 0.840 18.690.88 0.880 19.160.92 0.920 19.620.96 0.960 20.06

1 1.000 20.501.04 1.040 20.931.08 1.080 21.351.12 1.120 21.761.16 1.160 22.161.2 1.200 22.56

Copyright2015HydroInternational HBDesignerReleasev0.1

100mm HYDRO-BRAKE® ORIFICE FLOW CONTROLSPECIFICATION SHEET

Project Information Date: 08October2015 XX-XX-XXXX Site Name: DemoSiteTestTown

Primary Design Point: Maxdischargeatdesigntopwaterlevel

20.50l/s 1.000m Any changes to the flow control design should be checked by the design engineer as there will be an impact on the overall network design

Shearwater House • Clevedon Hall Estate • Victoria Road • Clevedon • BS21 7RDTel: 01275 878371 • Fax: 01275 874979 • www.hydro-int.com

Head / Flow Characteristic for100mm HYDRO-BRAKE® ORIFICE FLOW CONTROL

If you would like details for an alternative flow control solution using our Hydro-Brake Optimum® that can offer savings on construction costs, then please contact us for a revised quote.

PrimaryDesignPoint:Max

discharge at designtopwaterlevel; 20.50l/s;

1.000m

0.000

0.200

0.400

0.600

0.800

1.000

1.200

1.400

0.00 5.00 10.00 15.00 20.00 25.00

Hea

d (m

)

Flow (l/s)

hydro-int.com

ANY WARRANTY GIVEN BY HYDRO INTERNATIONAL WILL APPLY ONLY TO THOSE ITEMS SUPPLIED BY IT. ACCORDINGLY HYDRO INTERNATIONAL CANNOT ACCEPT ANY RESPONSIBILITY FOR ANY STRUCTURE, PLANT, OR EQUIPMENT, (OR THE PERFORMANCE THERE OF) DESIGNED, BUILT, MANUFACTURED, OR SUPPLIED BY ANY THIRD PARTY. HYDRO INTERNATIONAL HAVE A POLICY OF CONTINUOUS DEVELOPMENT AND RESERVE THE RIGHT TO AMEND THE SPECIFICATION. HYDRO INTERNATIONAL CANNOT ACCEPT LIABILITY FOR PERFORMANCE OF ITS EQUIPMENT, (OR ANY PART THEREOF), IF THE EQUIPMENT IS SUBJECT TO CONDITIONS OUTSIDEANY DESIGN SPECIFICATION. HYDRO INTERNATIONAL OWNS THE COPYRIGHT OF THIS DRAWING,WHICH IS SUPPLIED IN CONFIDENCE. IT MUST NOT BE USED FOR ANY PURPOSE OTHER THAN THAT FOR WHICH IT IS SUPPLIED AND MUST NOT BE REPRODUCED, IN WHOLE OR IN PART, WITHOUT PRIOR PERMISSION IN WRITING FROM HYDRO INTERNATIONAL.

©2019 HYDRO INTERNATIONAL

DO NOT SCALE DRAWING UNLESS OTHERWISE SPECIFIED,DIMENSIONS ARE IN MILLIMETERS. TOLERENCES ARE:± 1 MM UNLESS SHOWN OTHERWISE ANGLES: ± .5°

WEIGHT:

N/A

SHEET SIZE:

A3SHEET:

1 OF 1

DRAWING NO.:

D1 225-Orifice Plate 225 Outlet

NEXT ASSEMBLY:

D1 225-

Shearwater HouseVictoria RoadClevedon, UK

BS21 7RDTel: +44 (0)1275 878371 Fax: +44 (0)1275 874979

hydro-int.com

Rev:

B

Title

ORIFICE PLATE TO SUIT 225 OUTLET

DRAWN BY:

SK

CHECKED BY:

WCJAPPROVED BY

ASK

DATE:

09/01/2017

SCALE:

1:3

COMMENTS:

PROJECTION

MATERIAL:

Stainless Steel

Fabrication Drawing

REVISION HISTORY

REV BY DESCRIPTION DATE

B WCJ ISSUE 08 AUG 19

425

37

5

25

25

75

375

32

5

5

n12 (TYP 4 POSN'S)

DIAMETER TBC

1. THIS DRAWING SHALL BE READ IN CONJUCTION WITH ALL RELEVANTGENERAL ARRANGEMENT & DETAIL DRAWINGS. 2. ALL COMPONENTS SHALL BE MANUFACTURED IN ACCORDANCE WITH THE PRODUCTION SPECIFICATION HRD-FM09/15. 3. ALL COMPONENTS SHALL BE MANUFACTURED FROM STAINLESS STEEL GRADE 304

UNLESS SHOWN OTHERWISE.

Page 4 of 4

Design Data

Hydro-Brake®OrificeFlowControlDesignDataSheet C/0919

Hydro-Brake®OrificePrecisionCutOrificePlateFlowControl

TheHydro-Brake®FlowControlSeriesAsabrandleaderforvortexflowcontrolsformorethan30years,HydroInternationalcontinuestosetthestandardinflowcontrolmanagement technologies.

AtHydroInternational,weprideourselvesonourengineeringexcellenceandindevelopingarangeofflowcontrolsolutions,wehaveinvestedinsignificantresearchanddevelopmenttovalidatetheirperformance.

Hydro-Brake®Orifice

Thelow-costoptionfor unconstrainted sites(shownwithoptional screen).

Hydro-Brake® Optimum

Hydro-Brake® Agile Hydro-Brake®FloodAlleviation

Thevortexflowcontrolwithnoequvalent,deliveringNature’sPerfectCuvewithnomovingpartsandindependentlyverifiedbythe BBA and WRc.

Precisionengineeredflowcontrolforhighlyconstrainedapplications.

Thevortexcontrolledsolutiontowatercourseflooding.

HydroInternationalShearwaterHouse,ClevedonHallEstate,VictoriaRoad,Clevedon,BS217RD hydro-int.com

Tel:+44(0)1275337937stormwater@hydro-int.com