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Twinflow STDR

Twinflow STDR
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Twinflow STDR

Product catalog summary
Overview: The Twinflow STDR is a roof-mounted direct drive twin centrifugal fan designed for external mounting. It features a high-efficiency BAT Vpro backward curved impeller and Ziehl-Abegg EC motor, ensuring reliability and efficiency. Available in 10 sizes (200mm to 710mm), it supports air volume flow rates up to 3.9 m³/s and static pressures up to 1300 Pa, suitable for temperatures up to +60°C.
Casing: Made from 1.2mm thick Aluzinc, the casing minimizes vibration and includes a louvered air discharge to prevent bird ingress. It features EPDM rubber seals for secure duct connections and top access panels for easy servicing.
Impeller: The impeller is a backward curved centrifugal type, dynamically balanced to ISO 14694 Grade G6.3, ensuring smooth airflow and low noise.
Motors: Options include EC or AC external rotor motors with sealed-for-life bearings and thermal class ratings of THCL 130 or 155, suitable for ambient conditions up to +60°C.
Quality Management: Units are designed and manufactured according to BS EN ISO 9001:2008 and tested per BS848 Part 2 1985 and ISO 5801:2007.
Applications: Suitable for industrial buildings, banks, hospitals, offices, hotels, and shopping malls.
Performance Data: Detailed performance data includes airflow rates, static pressures, efficiency metrics, and sound power levels measured according to BS 848 Part 2:1985.
Accessories & Wiring: Information on accessories and wiring diagrams is provided, including product codes for controllers, flexible connections, clamps, and silencers.
Energy Efficiency: Highlights optimum energy efficiency points for different models, with efficiency percentages and FMEG values.
Specifications: Available in single-phase (200V to 277V) and three-phase (380V to 480V) configurations, operating at 50Hz or 60Hz. Includes detailed airflow performance data, efficiency percentages, and motor electrical data.
Sound Data: Sound power levels for different octave bands are provided for inlet and outlet positions, presented in decibels (dB) with total sound levels and silencer attenuation values.
Dimensional Data: Dimensions and weights for each product code are provided, along with contact information for Elta Fans Limited's departments and locations.
Standards and Testing: Tests and sound data preparation comply with BS 848 Part 2:1985 and ISO 12759 installation category C for efficiency measurements.
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Catalog excerpts

Twinflow STDR-1

t: 01384 275800 f: 01384 275810 e: [email protected] visit: eltaselect.com Twinflow STDR Product Brochure MIXED FLOW HEAT RECOVERY

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Twinflow STDR-2

Twinflow STDR MORE INFORMATION Accessories & Wiring Data Optimum Energy Efficiency Point Dimensional Data Performance, SFP & Electrical Data Sound Data QUICK FACTS Roof Mounted Direct Drive Twin Centrifugal Fan The Twinflow STDR...EC incorporates the BAT (Best Available Technology) Vpro backward curved impeller, with three dimensional profiled blades powered by the ultra reliable Ziehl-Abegg EC (electronically commutated) external rotor motor. The range of twin roof fans are suitable for external mounting, manufactured in Aluzinc with a natural finish. ü 10 standard sizes from 200mm to 710mm....

 Open the catalog to page 2
Twinflow STDR-3

Twinflow STDR Performance, SFP & Electrical Data SINGLE Phase - 220V to 240V / 50Hz Product Code Speed r/min Airflow m³/s @ Static Pressure Pa. 25 Motor Electrical Data Overall Efficiency % Overall static efficiency, r/min and FMEG values are per ISO 12759 installation category C. FLC Amps @ 230V / 1Ph / 50Hz. The overall A-weighted sound pressure level is at a distance of 3m with spherical free-field propagation. It is expressed in dB re-20µPa and is presented for comparative purposes only. Sound Data SINGLE Phase - 220V to 240V / 50Hz Sound Power Level dBW @ Octave Band Hz Product Code Speed...

 Open the catalog to page 3
Twinflow STDR-4

Twinflow STDR Performance, SFP & Electrical Data THREE Phase - 380V to 415V / 50Hz Product Code Speed r/min Airflow m³/s @ Static Pressure Pa. Airflow 0 Overall Efficiency % Motor Electrical Data FMEG Overall static efficiency, r/min and FMEG values are per ISO 12759 installation category C. FLC Amps @ 400V / 3Ph / 50Hz. The overall A-weighted sound pressure level is at a distance of 3m with spherical free-field propagation. It is expressed in dB re-20µPa and is presented for comparative purposes only. Sound Data THREE Phase - 380V to 415V / 50Hz Sound Power Level dBW @ Octave Band Hz Product...

 Open the catalog to page 4
Twinflow STDR-5

Twinflow STDR Accessories & Wiring Data For more information on Accessories & Wiring Diagrams, please see individual product downloads, or visit eltaselect.com/information-centre SINGLE Phase - 220V to 240V / 50Hz Product Code Electronic Controller Flexible Connections (each) Transformer Controller Clamps (each) Wiring Diagram No.no Please enquire. THREE Phase - 380V to 415V / 50Hz Product Code Transformer Controller Flexible Connections (each) Clamps (each) Please enquire. Optimum Energy Efficiency Point SINGLE Phase - 220V to 240V / 50Hz Speed r/min Product Code Speed r/min Product Code Elta...

 Open the catalog to page 5
Twinflow STDR-6

Twinflow STDR Performance, SFP & Electrical Data SINGLE Phase - 200V to 277V / 50Hz or 60Hz Product Code Control Voltage Airflow m³/s @ Static Pressure Pa. Airflow 0 m³ / s W / (L/s) m³ / s W / (L/s) m³ / s Motor Electrical Data Overall Efficiency FMEG % Overall static efficiency, r/min and FMEG values are per ISO 12759 installation category C. FLC Amps @ 230V / 1Ph / 50Hz. The overall A-weighted sound pressure level is at a distance of 3m with spherical free-field propagation. It is expressed in dB re-20µPa and is presented for comparative purposes only. A Variable Speed Drive is intergrated...

 Open the catalog to page 6
Twinflow STDR-7

Twinflow STDR Performance, SFP & Electrical Data SINGLE Phase - 200V to 277V / 50Hz or 60Hz Product Code Control Voltage Airflow m³/s @ Static Pressure Pa. Airflow 0 m³ / s W / (L/s) m³ / s W / (L/s) m³ / s Overall Efficiency FMEG % Motor Electrical Data Overall static efficiency, r/min and FMEG values are per ISO 12759 installation category C. FLC Amps @ 230V / 1Ph / 50Hz. The overall A-weighted sound pressure level is at a distance of 3m with spherical free-field propagation. It is expressed in dB re-20µPa and is presented for comparative purposes only. A Variable Speed Drive is intergrated...

 Open the catalog to page 7
Twinflow STDR-8

Twinflow STDR Sound Data SINGLE Phase - 200V to 277V / 50Hz or 60Hz Product Code Sound Power Level dBW @ Octave Band Hz Control Voltage Inlet Outlet Data provided at standard air density of 1.2 kg/m³. Tests and preparation of the sound data have been carried out in accordance with BS 848 Part 2:1985 at 50% peak pressure. The Sound Power Level Spectra are in dB re-1pW. *At 2V the average spherical free-field sound pressure levels cannot be accurately measured above the background level in our conventional laboratory facilities. Elta Fans Limited has a policy of continuous product development and...

 Open the catalog to page 8
Twinflow STDR-9

Twinflow STDR Sound Data SINGLE Phase - 200V to 277V / 50Hz or 60Hz Product Code Sound Power Level dBW @ Octave Band Hz Control Voltage Data provided at standard air density of 1.2 kg/m³. Tests and preparation of the sound data have been carried out in accordance with BS 848 Part 2:1985 at 50% peak pressure. The Sound Power Level Spectra are in dB re-1pW. *At 2V the average spherical free-field sound pressure levels cannot be accurately measured above the background level in our conventional laboratory facilities. Elta Fans Limited has a policy of continuous product development and improvement...

 Open the catalog to page 9
Twinflow STDR-10

Twinflow STDR Performance, SFP & Electrical Data THREE Phase - 380V to 480V / 50Hz or 60Hz Product Code Control Voltage Airflow m³/s @ Static Pressure Pa. Airflow 0 m³ / s W / (L/s) m³ / s W / (L/s) m³ / s Motor Electrical Data Overall Efficiency FMEG % Overall static efficiency, r/min and FMEG values are per ISO 12759 installation category C. FLC Amps @ 400V / 3Ph / 50Hz. The overall A-weighted sound pressure level is at a distance of 3m with spherical free-field propagation. It is expressed in dB re-20µPa and is presented for comparative purposes only. A Variable Speed Drive is intergrated...

 Open the catalog to page 10
Twinflow STDR-11

Twinflow STDR Sound Data THREE Phase - 380V to 480V / 50Hz Product Code Sound Power Level dBW @ Octave Band Hz Control Voltage Data provided at standard air density of 1.2 kg/m³. Tests and preparation of the sound data have been carried out in accordance with BS 848 Part 2:1985 at 50% peak pressure. The Sound Power Level Spectra are in dB re-1pW. *At 2V the average spherical free-field sound pressure levels cannot be accurately measured above the background level in our conventional laboratory facilities. Elta Fans Limited has a policy of continuous product development and improvement and therefore...

 Open the catalog to page 11

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.