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Summary of Contents for Albion ART 250
- Page 1 Installation & Operating Manual ART 250 Variable Orifice Double Regulating Valve Albion Valves (UK) Ltd www.albionvalvesuk.com Email: sales@albionvalvesuk.com Tel: 01226 729900 ART 250 Rev 2...
- Page 2 EN 1092 PN 16 -20°C – 120°C 16 bar ART 250 PN 25 DN 50 – DN 300 EN 1092 PN 25 -20°C – 120°C 25 bar Flow Coefficient The flow rate can be calculated using the Kv value and a measured signal. Kv = Q*36 / √ ΔP Kvs = Q*36 / √ ΔPs Where Kv & Kvs = flow coefficient (m3/hr at 1 bar differential) Q - Flow rate (l/s) ΔP - Headloss attributable to valve (kPa) ΔPs - Differential pressure across tappings (signal) (kPa) Kvs Values Size 48.2 82.6 117.4 211.4 381.5 462.4 1135 2022 Sizing Once the required flow rate has been calculated, the size of the Variable Orifice Double Regulating Valve can be determined based on the following: With the valve fully open, a minimum signal at the design flow rate of 1 kPa. The maximum signal is normally less than 5 kPa but can be up to 10 kPa. For sizing the flow velocity should not exceed 3 m/s at the design flow rate. ART 250 Rev 2...
- Page 3 • Where fitted, remove flange protectors / dust caps and all other packaging material. • Care should be taken to ensure the surface finish of the valve is protected during installation. • The valves may be installed in horizontal or vertical pipework. • The valve is uni-directional and should only be used for flow in the direction shown on the valve. • Suitable gaskets / sealing material should be used during installation. • ART 250 VODRV should be installed with a minimum of 5 pipe diameters upstream and 2 pipe diameters downstream, this is to ensure flow accuracy is maintained during the commissioning stage. • The memory stop can be set once the valve is at the correct design flow rate. This can be done by removing the black handwheel cap and rotating the cross head screw in a clockwise direction until resistance is met. Approvals Classification • The valve is classified in accordance with PED 2014/68/EU as Sound Engineering Practice (SEP). Troubleshooting • If any maintenance is to be undertaken on the valve it is the responsibility of the installer to ensure the system is adequately drained and depressurized. • A full risk assessment should be undertaken prior to any works taking place. Warranty • For further details of Albion Valves (UK) Ltd warranty period, please refer to Albion Valves (UK) Ltd ‘Conditions of Sale’ available on our website. ART 250 Rev 2...
- Page 4 DN50 ART 250 Variable Orifice Double Regulating Valve Position 10.2 15.2 21.9 29.7 38.9 44.7 48.2 Signal / Flowrate Chart used to determine flowrate from signal measured across orifice Q = Kvs √ Δp Where Q = Flowrate l/s Δp = Signal kPa Kvs = Signal Co-efficient ART 250 Rev 2...
- Page 5 DN65 ART 250 Variable Orifice Double Regulating Valve Position 20.6 30.9 44.0 58.3 70.3 77.8 82.6 Signal / Flowrate Chart used to determine flowrate from signal measured across orifice Q = Kvs √ Δp Where Q = Flowrate l/s Δp = Signal kPa Kvs = Signal Co-efficient ART 250 Rev 2...
- Page 6 DN80 ART 250 Variable Orifice Double Regulating Valve Position 20.9 35.4 52.1 73.7 92.1 105.6 117.4 Signal / Flowrate Chart used to determine flowrate from signal measured across orifice Q = Kvs √ Δp Where Q = Flowrate l/s Δp = Signal kPa Kvs = Signal Co-efficient ART 250 Rev 2...
- Page 7 DN100 ART 250 Variable Orifice Double Regulating Valve Position 61.5 95.7 130.4 158.1 181.3 195.6 211.4 Signal / Flowrate Chart used to determine flowrate from signal measured across orifice Q = Kvs √ Δp Where Q = Flowrate l/s Δp = Signal kPa Kvs = Signal Co-efficient ART 250 Rev 2...
- Page 8 DN125 ART 250 Variable Orifice Double Regulating Valve Position 99.9 155.3 221.0 266.5 305.9 346.6 381.5 Signal / Flowrate Chart used to determine flowrate from signal measured across orifice Q = Kvs √ Δp Where Q = Flowrate l/s Δp = Signal kPa Kvs = Signal Co-efficient ART 250 Rev 2...
- Page 9 DN150 ART 250 Variable Orifice Double Regulating Valve Position 125.1 183.3 254.9 320.5 369.2 418.0 462.4 Signal / Flowrate Chart used to determine flowrate from signal measured across orifice Q = Kvs √ Δp Where Q = Flowrate l/s Δp = Signal kPa Kvs = Signal Co-efficient ART 250 Rev 2...
- Page 10 DN200 ART 250 Variable Orifice Double Regulating Valve Position 268.1 335.3 399.2 Signal / Flowrate Chart used to determine flowrate from signal measured across orifice Q = Kvs √ Δp Where Q = Flowrate l/s Δp = Signal kPa Kvs = Signal Co-efficient ART 250 Rev 2...
- Page 11 DN250 ART 250 Variable Orifice Double Regulating Valve Position 1013 1135 Signal / Flowrate Chart used to determine flowrate from signal measured across orifice Q = Kvs √ Δp Where Q = Flowrate l/s Δp = Signal kPa Kvs = Signal Co-efficient ART 250 Rev 2...
- Page 12 DN300 ART 250 Variable Orifice Double Regulating Valve Position 1025 1215 1393 1575 1730 1850 2022 Signal / Flowrate Chart used to determine flowrate from signal measured across orifice Q = Kvs √ Δp Where Q = Flowrate l/s Δp = Signal kPa Kvs = Signal Co-efficient ART 250 Rev 2...
- Page 13 Delivery We know that time is money, and when a priority project depends on a part you can trust Albion to deliver – next day for all orders placed before 4:00PM. Choice We may have started out with a single brass ball valve, but our range has grown substantially since and we now consider ourselves to be a ‘One Stop Shop’...
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