Hattersley Fig.1051 User manual

Installation and Operating Instructions
Constant Flow Regulator (CFR)
Fig.1051
General Notes
The Hattersley Fig.1051
• Can be used in variable volume heating
and chilled water systems.
• Has a double regulating feature allowing
the valve opening to be set with a 3mm
Allen key.
• Is operated by means of the handwheel
with position indicator or with
recordable set position.
• Has a linear control characteristic
across setting operating range.
• Has built in Differential Pressure
Control.
• HasamaximumworkingΔP=4bar
• Has built in pressure test points to verify
operational differential pressures.
Limit of Use
These valves have been categorised in accordance with the Pressure Equipment Directive
2014/68/EU.
The fluid to be transported is limited to group 2 liquids i.e. non-hazardous.
On no account must these valves be used on any group 1 liquids, group 1 gases, group 2
gases or unstable fluids.
Note: Valves are classified as SEP (sound engineering practice) and as such cannot be CE
marked and do not require a declaration of conformity.
Fig.1DN25/DN32Style(left)andDN40/DN50Style(right)

Hattersley Constant Flow Regulator02
Installation and Operating Instructions
Installation
These instructions are issued as guidelines only and do not cover all installed conditions. If unsure
pleasecontactourTechnicalHelplineon01473277400,beforeinstallation.
• It is advised that the valve should be installed in a run of pipe of the same nominal size.
• Hattersley products are designed for installation and use within suitably designed systems
reflectingCIBSE,BSRIAandHVACguidelines.Particularcareshouldbetakenwithregardsto;
 oAccessibilitytovalveforsetting/adjustment
 oTubecutting–aftercuttingandthreading,theendmustbedeburredorreamed
before fitting to the valve.
 oJointing–nothreadjointingmaterialsmustbeallowedtoprotrudeinsidethebore.
 oBracketing/supports–thepipingsystemshallprovidesuitablesupportandmustbe
carefully aligned and at the correct distance between centres for the size and type
of valve.
• Orientation: The Fig. 1051 can be positioned in any orientation.
• Normallyinstalledonreturnpipework,i.e.aftertheequipmentitiscontrolling,butcanbe
installed in flow if required.
• Ensure direction of flow is correct - indicated by an arrow on the valve body.
• Fig.1051 operates between a minimum and maximum pressure drop across the valve -
seecommissioningsectiononpage4.
• CFR’sarenotdesignedasisolationvalves.Dedicatedisolationvalvesshouldbeinstalled
toisolateagainstsystempressure,i.e.formaintenanceetc.,whendisconnecting/draining
pipework.
• Careshouldbetakentonotexceedmaximumoperatingdifferentialpressure,toprevent
damage to the internal components.
• SystemsshouldbeinstalledwithstrainerstoprotecttheCFRandotherinstalleditems.
• StraightlengthsofpipeworkarenotrequiredforCFR’sbutsomestraightlengthsare
recommended to create a more stable flow pattern.
Flushing
Controlvalves,liketheCFR,aresizedtogivegoodcontroloverthe
systemwater,therefore,havebeendesignedwithasmallconvoluted
flow path. These water ways may not allow adequate water velocities
forflushingofthecoil,evenwhenfullyopen.Therefore,inlinewith
BSRIArecommendations,itisrecommendedthataflushingpoint
belocatedbetweenthecoilandtheCFR.Thisallowsthecoiltobe
flushedwithoutthewaterpassingthroughtheCFR.
PleaserefertoBSRIAGuideBG29–2012forguidance.

Product Title Here
03Hattersley Constant Flow Regulator 03
Valve Setting Indicator
Fig.1051 valves operate from closed to fully
openwith4completeturnsofthehandwheel.
The handwheel indicates the valve setting by means
of digits in the outer (left) and inner (right) windows.
The digit in the inner window indicates tenths of a turn.
Theexampletotherightshowsavalvesettingof4-0
turns (fully open).
Regulator
Flowregulationisachievedbyadjustingthevalvesettinguntiltherequiredflowrateisobtained.
The‘Microset’handwheelwillindicatethefinalvalvesetting.Seetable1onpage4forflowrate
setting.
Setting Facility
The valve setting at which the required flow rate is achieved may be retained as follows:
 1.Removecapincentreofhandwheel
 2.UsingtheAllenkeyprovidedtightenthecentrescrewuntilitstops.
Do not over-wench.
 3.Replacecentrecapinhandwheel.
Thevalveisnowsetandbeadjustedandre-settotheoriginalsetpoint.
Pressure Temperature Rating
Temperature °C -10 to 120
Pressure (Bar) 16

Hattersley Constant Flow Regulator 04
Installation and Operating Instructions
Commissioning
TheFig.1051controlstheflowratedependingonitssetposition,therefore,removingtheneedto
measure the flow rate.
TheFig.1051maintainsaconstantdifferentialpressureacrossitsinternalseat,anyexcess
pressure being removed by the internal differential pressure controller. To ensure that sufficient
pressureisavailableforthedifferentialpressurecontrollertocontroltheflowratecorrectly,a
differential pressure reading should be taken using the test points provided.
Whentakingdifferentialpressurereadings,itisimportantthatthesystemisrunningatfullload,
i.e.withCFR’ssettodesignflowrate.Thisensuresthatdifferentialpressurereadingsarecarried
outinthemostunfavourableconditions,guaranteeingoptimumperformanceinnormalrunning
conditions.
ToensurethatallCFRsareworkingattherequireddifferentialpressure,itisnecessarytocheck
theleastfavoured/indexCFR.ByverifyingtheleastfavouredCFRissetcorrectlythenallother
CFRsmusthaveahigherdifferentialpressure.However,wewouldalsorecommendthata
selectionofotherCFRsaretestedalongthecircuittoverifythis.
Differential Pressure Requirements
Ateach%settingoptionallsizesrequireaspecificconstantΔP(DifferentialPressure)toensure
theCFRiswithinitsworkingrange:
Table 1 - CFR Flow Rate Setting Table
H/W
Setting
%
Opening
FLOW RATE l/s
DN25 DN32 DN40 DN50
ΔP
Across
Test
Points
Activation
ΔP
Overall
(kPa)
Flow
Rate
l/s
ΔP
Across
Test
Points
Activation
ΔP
Overall
(kPa)
Flow
Rate
l/s
Activation
ΔP
Overall
Across
Test
Points
(kPa)
Flow
Rate
l/s
Activation
ΔP
Overall
Across
Test
Points
(kPa)
Flow
Rate
l/s
4.0 100.0 10 25 0.48 30 40 0.90 35 2.40 35 3.20
3.5 87.5 10 25 0.42 30 40 0.79 35 1.90 35 2.80
3.0 75.0 10 20 0.36 30 35 0.68 30 1.50 30 2.40
2.5 62.5 10 20 0.30 30 35 0.56 30 1.20 30 2.00
2.0 50.0 10 20 0.24 30 30 0.45 25 0.90 30 1.60
1.5 37.5 10 20 0.18 30 30 0.34 25 0.70 30 1.20
1.0 25.0 10 20 0.12 30 25 0.23 20 0.50 25 0.80
0.5 12.5 10 20 0.06 30 25 0.11 20 0.30 25 0.40
0.0 0.0 0 0 0.00 0 0 0.00 0 0.00 0 0.00

Forflowratesbetweensettings,interpolationofpositioncanbeused.
PleasenotethatDN25andDN32testpointsmeasurethedifferentialpressureacrosstheseat,
not overall pressure drop.
PleasenotefortheDN40andDN50thetestpointsmeasuretheoveralldifferentialpressuredrop
across the valve only.
The pump speed should be set to ensure that the required differential pressure is always
available.BysettingthedifferentialpressureacrosstheleastfavouredCFRtothevaluestated
intheabovetable,itensuresthatminimumpumpenergyisused,therefore,reducingsystem
running costs and CO2 emissions:
DN25 & DN32
To set pump speed to achieve this: whilst measuring ΔP (across test points), increase
pump speed until a constant ΔP is achieved, however please note that the typical ΔP
value, as shown in the table above, can differ but in itself is not critical to operation.
DN40 & DN50
To set pump speed to achieve this: whilst measuring ΔP (across test points), increase
pump speed until a value greater than the minimum stated in the above table is achieved.
As the measured ΔP is the total pressure drop across the PICV, the measured value will
continue to rise as pump speed is increased. Any value above the minimum requirement
will increase running costs, therefore, reducing system efficiency.
Theoptimumsettingisachievedwhenthereissufficient,butnotexcessive,pumppressure
available.
Flow rate verification should be carried out using separate Flow Measurement Devices (FMD)
wherefitted.InlinewithCIBSE&BSRIArecommendations,werecommendthatasaminimum
requirement,FMDsareinstalledinallbranches.
Installation and Operating Instructions
Hattersley Constant Flow Regulator5

Product Title Here
2
www.cranebsu.com
H_FIG.1051_1117 IOM_200054-000R01_v1
Every effort has been made to ensure that the information contained in
this publication is accurate at the time of publishing. Crane Ltd assumes
no responsibility or liability for typographical errors or omissions or
for any misinterpretation of the information within the publication and
reserves the right to change without notice.
• Designed and manufactured under quality management
 systemsinaccordancewithBSENISO9001-2008
FM311ISO9001
POBOX719,IPSWICH,IP19DU
HOMESALES:+44(0)1473277410
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TECHNICALHELPLINE:08456041790
FAX:+44(0)1473277411
EMAIL: [email protected]
EMAIL: [email protected]
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