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F U T U R E V A L V E T E C H N O L O G Y
Maintains a consistent performanceUse with variable speed pumps within HVAC systemsEnhances efficiencyReduces energy consumptionSimplifies the commissioning processEasily adjusted to meet future conditions
HEATING
VENTILATION
AIR CON
WATER
Differential PressureControl ValvesStabilises Differential Pressure in heatingand chilled variable flow systems
UpdatedPackage
Differential Pressure Control ValvesFeatures and Benefits
01 Hattersley DPCV
DPCV - SPECIFICALLY DESIGNED TOOPTIMISE SYSTEM PERFORMANCEExtremely efficient, the DPCV is set to a maximumdifferential pressure limit, under dynamic balancingconditions, which ensures flow cannot exceed a desiredrate. It therefore helps reduce energy consumption, therisk of noise and simplifies the commissioning process.
The EPM diaphragm, which separates the upper andlower chamber of the valve, in combination with thebalanced piston is key to stabilising differential pressurewithin the system. The rubber-seated piston, controlledby the diaphragm, closes the valve on rising differentialpressure and opens it on falling differential pressure. Thevalve will continue to move in this way until equilibrium ofpressure is achieved. This ensures the maximum desiredflow rates or differential pressures are not exceeded.
Installing a DPCV in a system to control differentialpressure, can also help to minimise the risk of noise.
Installing a DPCV in a circuit ensures the system remainsbalanced, independent from any changes in other areasof the circuit, which greatly simplifies the balancing andcommissioning procedure. It also maintains the controlauthority of the 2 port control valve.
Available in sizes from DN15 to DN50, in flow and returnconfigurations, the DPCV operates at a temperaturerange of -10˚C to 100˚C and is PN16 rated. The pressuredifferential is set on installation, across a 20 to 100 kParange, and can be easily adjusted on commissioning asrequired by the changing conditions.
Hattersley highly recommends the use of a companionvalve as a part of the circuit. As well as providingstandard flow measuring and regulating features, thecompanion valve has an integral tapping point for animpulse tube to link the valve and the DPCV.
Diaphragm
Separates and balances the upper andlower chambers and therefore thedifferential pressure. The Diaphragmreacts quickly to fluctuation in pressure.
P2
P1
COMPANIONVALVE
DPCV
LOAD
2 PORT CONTROL VALVE
IMPULSETUBE
DPCV
IMPULSETUBE
COMPANIONVALVE
2 PORT CONTROL VALVE
LOAD
P1
P3
P2
Hattersley DPCV 02
Impulse TubeAlongside the DPCV, an impulse tube andadapter are supplied as standard. It isessential to the valve’s performance as ittaps pressure from the other side of thecircuit and links it to the valve’s chambers.
Flow Configuration (F400)shown as an example
Adjuster
Easily sets differentialpressure across a20-100 kPa range, and can be adjustedto maintain desiredflow rates ordifferential pressure,matching circuitconditions.
Integral PressureBalance Tube
Pressure from beforethe load is linked tothe upper chamber(flow mountedconfiguration only).
TYPICAL INSTALLATION LAYOUTS
EXAMPLE FLOW CONFIGURATION (F400)
EXAMPLE RETURN CONFIGURATION (R400)
DPCV INSTALLED ACROSS FLOW AND RETURNPIPEWORK OF A SINGLE TERMINAL UNIT TO MAINTAINHIGH 2-PORT CONTROL VALVE AUTHORITY.
Bosses enable fittingof Test Points for DPconfirmation andsystem diagnostics.
Flow ConfigurationTop View
Return ConfigurationTop View
1
2
3
4
IMPULSE TUBECONNECTION
107
B
A
5
119 119
Hattersley DPCV 03
MATERIALS
Item Description Material
1 Body Bronze BSEN1982 (CC491K)
2 Bonnet Bronze BSEN1982 (CC491K)
3 Chamber Bronze BSEN1982 (CC491K)
4 Adjuster Nylon Grade PA6
5 Plug R 1/4” DZR Brass BSEN12164 (CW602N)
INT Stem / Piston Stainless Steel BSEN10088 - 1: 2005
INT Diaphragm Rubber EPDM
INT O-Ring Seals Rubber EPDM
DIMENSIONS AND WEIGHTS
F400 Flow R400 Return
PN16 | DPCV
DIMENSIONAL DRAWINGS
See diagrams for item numbers INT denotes an internal component not visible on these drawings
Flow ConfigurationFront View
Flow & Return ConfigurationSide View
Return ConfigurationFront View
Size A(mm)
B(mm)
End ConnectionEN10226
Weight(kg)
Flow(Fully Open Kv)
DN15 87 175 Rp 1/2” Parallel 2.32 2.32
DN20 96 175 Rp 3/4” Parallel 2.36 3.2
DN25 100 185 Rc 1” Taper 2.53 6.45
DN32 114 190 Rc 11/4” Taper 2.73 11.0
DN40 125 195 Rc 11/2” Taper 3.01 15.39
DN50 146 205 Rc 2” Taper 3.46 24.68
4
3
2
1
IMPULSE TUBECONNECTION
80
DN15 & DN20 End Connections: EN10226 Rp ParallelDN25 to DN50 End Connections: EN10226 Rc Taper
PN16 | DPCV
Hattersley DPCV 04
MATERIALS
DIMENSIONS AND WEIGHTS
Fig. DPF1732 Companion Valve
Item Description Material
1 Body Bronze BSEN1982 (CC491K)
2 Bonnet DN15 to DN32 DZR Brass BSEN12164 (CW602N)Bonnet DN40 to DN50 Bronze BSEN1982 (CC491K)
3 Stem DZR Brass BSEN12164 (CW602N)
4 Disc (DN25 Only) DZR Brass BSEN12164 (CW602N)Disc ( DN32 to DN50) DZR Brass BSEN12164 (CW602N)
5 Handwheel Plastic
6 O-Ring Seal EPDM Rubber WRAS approved
7 Orifice Insert DZR Brass BSEN12164 (CW602N)
8 Test Valve DZR Brass BSEN12164 (CW602N)
9 Plug R 1/8” DZR Brass BSEN12164 (CW602N)
10 Plug R 1/4” DZR Brass BSEN12164 (CW602N)E
A
90
B
8
1
2
3
4
6
7
10
PLUGS CAN BEREPLACED AT SITEWITH TEST POINTSFOR DIFFERENTIALPRESSURE VERIFICATION
Fig No. Nom.Size
A(mm)
B(mm)
C(mm)
D(mm)
E - End ConnectionEN10226
Fully Open
KVs Weight
Flow (Kv) HeadLoss (K)
DN15 & DN20 End Connections: EN10226 Rp ParallelDN25 to DN50 End Connections: EN10226 Rc Taper
DPF1732
DN15 87 105 50 34 Rp 1/2” Parallel 1.87 30.27 1.943 0.57
DN20 96 106 54 36 Rp 3/4” Parallel 3.14 34.55 4.181 0.61
DN25 100 127 62 39 Rc 1” Taper 5.59 27.85 7.46 0.90
DN32 114 128 66 43 Rc 11/4” Taper 10.8 22.60 15.33 1.07
DN40 125 143 70 46 Rc 11/2” Taper 18.1 14.76 23.06 1.42
DN50 146 144 78 48 Rc 2” Taper 29.1 14.62 47.7 1.97
DPF1732L DN15 87 105 50 34 Rp 1/2” Parallel 0.57 325.8 0.506 0.57
DPF1732M DN15 87 105 50 34 Rp 1/2” Parallel 1.06 94.20 1.003 0.57
C
D
8
5
9 IMPULSE TUBECONNECTION POINT
DIMENSIONAL DRAWINGS
PO BOX 719, IPSWICH IP1 9DUHOME SALES: +44 (0)1744 458670EXPORT SALES: +44 (0)1744 458671TECHNICAL HELPLINE: 0845 604 1790FAX: +44 (0)1744 26912EMAIL: [email protected]: [email protected]: [email protected]
www.cranebsu.com
H_DPCV_10_2012
• Designed and manufactured under quality management systems in accordance with BS EN ISO 9001-2008
FM311ISO 9001
Every effort has been made to ensure that the information contained in this publication is accurate at the time ofpublishing. Hattersley assumes no responsibility or liability for typographical errors or omissions or for anymisinterpretation of the information within this publication and reserves the right to change without notice.
We hope that our communications have an impact on you, but not on the environment. We have taken steps toensure this leaflet is printed on FSC material and the paper is made by a totally chlorine free process.
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