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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.
Installation and Operating Instructions
Fig.1 DN25 / DN32 Style (left) and DN40 / DN50 Style (right)
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Summary of Contents for Hattersley Fig.1051
- Page 1 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.
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Page 2: Installation
• 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... - Page 3 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.
- Page 4 1.90 2.80 75.0 0.36 0.68 1.50 2.40 62.5 0.30 0.56 1.20 2.00 50.0 0.24 0.45 0.90 1.60 37.5 0.18 0.34 0.70 1.20 25.0 0.12 0.23 0.50 0.80 12.5 0.06 0.11 0.30 0.40 0.00 0.00 0.00 0.00 Hattersley Constant Flow Regulator...
- Page 5 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. Hattersley Constant Flow Regulator...
- Page 6 TECHNICAL HELPLINE: 0845 604 1790 FAX: +44 (0)1473 277411 Every effort has been made to ensure that the information contained in EMAIL: uksales@hattersley.com this publication is accurate at the time of publishing. Crane Ltd assumes EMAIL: exportsales@hattersley.com no responsibility or liability for typographical errors or omissions or for any misinterpretation of the information within the publication and www.hattersley.com...