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Pressure Independent
Control Valve (PICV)
General Notes
The Hatterley Fig. 1934 PICV;
•
can be used in variable volume heating and
chilled water systems
•
provides modulating control for terminal units
when installed with a modulating actuator
•
has an equal percentage control characteristic
at all pre-set flow rates with actuator
•
has built in Differential Pressure Control
•
has an operating temperature: 0 to 90˚C
•
has a maximum working ∆P of 400kPa
•
has a maximum operating pressure of 25 bar
•
Integral test points for verification of ∆P and
valve performance
Installation and Operating Instructions
PICV Fig. 1934
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Summary of Contents for Hattersley 1934 PICV
- Page 1 Installation and Operating Instructions Pressure Independent Control Valve (PICV) General Notes The Hatterley Fig. 1934 PICV; • can be used in variable volume heating and chilled water systems • provides modulating control for terminal units when installed with a modulating actuator •...
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Page 2: Limits Of Use
These instructions are issued as guidelines only and do not cover all installed conditions. If unsure, please contact our Technical Helpline before installation. • Hattersley products are designed for installation and use within suitably designed systems reflecting CIBSE, BSRIA and HVAC guidelines. Particular care should be taking with regards to;... -
Page 3: Set Position
Installation Cont. Please note this valve must not be used for end of line service or as an isolation valve. In order for the valve to function as intended water quality should be maintained at all times (e.g. as per BSRIA BG50 or equivalent). Flushing Control valves, like the PICV, are sized to give good control over the system flow, therefore have been designed with small convoluted flow paths. - Page 4 PICV is set to the required differential pressure, all other PICVs must have a higher differential pressure. However, we would also recommend that a selection of other PICVs are tested along the circuit to verify this. Hattersley – Pressure Independent Control Valve – Fig. 1934...
- Page 5 Care should be taken to ensure that reduced flow rates are still within the measuring range of the branch FMD, i.e. that the measured ‘signal’ doesn’t drop below 1kPa. Hattersley – Pressure Independent Control Valve – Fig. 1934...
- Page 6 BUILDING 4, OFFICE 901, EXPORT SALES: +44 (0)1473 277450 THE GALLERIES, PO BOX 17415, TECHNICAL HELPLINE: +44 (0)1473 277400 DOWNTOWN JEBEL ALI FAX: +44 (0)1473 277411 DUBAI, UAE EMAIL: uksales@hattersley.com TELEPHONE: 5800 816 4(0) 971+ EMAIL: export@hattersley.com EXPORT SALES ENQUIRES: www.hattersley.com mena-enquiries@cranefs.com •...