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: uksales@hattersley.comEMAIL: export@hattersley.comEMAIL: tech-enquiries@hattersley.comwww.hattersley.com

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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