Air Distribution Products BIA Adjustable Displacement Diffuser Data Sheet
/ 12 | Variable Geometry Diffusers Table of Contents Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Ordering Code . . . . . . . . . . . . . . . . . . . . . . . . . 6 Technical Parameters . . . . . . . . . . . . . . . . . . . .
Variable Geometry Diffusers | 3 / 12 Description BIA is a variable geometry displacement/induction hybrid diffuser, mainly intended for air supply in comfort ventilation systems for industrial-, officeand public halls.
/ 12 | Variable Geometry Diffusers Design The diffuser casing is made from galvanized perforated steel sheet. A version with the casing from satin finish stainless steel is also available for better protection in case of water condensation in spaces with higher humidity. The air inlet with rubber gasket fits to the standard circular spiral ducts. The upper part with vertical slit perforation permits the air discharge in vertical direction with higher face velocity (induction mode).
Variable Geometry Diffusers | 5 / 12 Setup Possibilities +45° 0° -45° BIA-...-HC UC 0V 2V 10 V BIA-...-MC Fig. 4: Different deflection mechanism setup and resulting air flow pattern Dimensions øD Tab. 1: Dimensions of BIA Type-Size H C øD m HC (manual) C H (mm) Fig.
/ 12 | Variable Geometry Diffusers Ordering Code BIA- - - 200 250 315 400 500 Size - Inlet ø (mm) Adjustment Mechanism Type 630 Manual HC Actuator, continuous position 0 V ...
Pa 60 80 100 120 140 l/s 50 dB(A) BIA-200 28 160 Pa 100 25 BIA-250 150 200 250 | 7 / 12 l/s 50 dB(A) 20 24 20 45 dB(A) 45 dB(A) 15 16 40 dB(A) 40 dB(A) 10 12 35 dB(A) 35 dB(A) 8 30 dB(A) 4 200 25 dB(A) 25 dB(A) 300 400 500 600 m³/h Diagram 1: Pressure drop and radiated A-weighted sound power level dependent on air flow volume m 5 30 dB(A) 5 400 500 600 700 800 900 1000 m³/h Diagram 3: Pressure drop and radiated A-weighted sound power level dependent on air flow volum
Variable Geometry Diffusers 200 Pa 25 240 280 320 360 400 440 l/s BIA-315 Pa 20 300 400 500 600 l/s 50 dB(A) BIA-400 50 dB(A) 20 15 45 dB(A) 45 dB(A) 15 10 40 dB(A) 40 dB(A) 10 35 dB(A) 35 dB(A) 5 30 dB(A) 5 25 dB(A) 600 800 30 dB(A) 25 dB(A) 1000 1200 1400 1600 m³/h 1000 1200 1400 1600 1800 2000 2200 m³/h Diagram 5: Pressure drop and radiated A-weighted sound power level dependent on air flow volume Diagram 7: Pressure drop and radiated A-weighted sound power leve
600 Pa 500 16 BIA-500 700 800 900 1000 l/s 50 dB(A) 14 12 Pa 14 800 1000 1400 l/s BIA-630 12 50 dB(A) 10 45 dB(A) 10 45 dB(A) 8 40 dB(A) 8 40 dB(A) 6 35 dB(A) 6 35 dB(A) 4 30 dB(A) 4 2 1200 | 9 / 12 30 dB(A) 2 25 dB(A) 2000 2500 3000 3500 m³/h 25 dB(A) 2800 3200 3600 4000 4400 4800 5200 m³/h Diagram 9: Pressure drop and radiated A-weighted sound power level dependent on air flow volume Diagram 11: Pressure drop and radiated A-weighted sound power level dependent
/ 12 | Variable Geometry Diffusers Installation, Maintenance & Operation Information about installation, maintenance and operation is available in the “UserManual_BIA” document on Systemair DESIGN. Dry indoor conditions with an operation temperature range of -20°C to +50°C. Transport & Storage Dry indoor conditions with a temperature range of -40°C to +50°C. Supplement Any deviations from the technical specifications contained herein and the terms should be discussed with the manufacturer.
Variable Geometry Diffusers Related Products BURE Variable Geometry Diffusers Product information is available within the “DataSheet_BURE” technical documentation on Systemair DESIGN. VVT Thermo-Adjustable Diffuser Product information is available within the “DataSheet_VVT” technical documentation on Systemair DESIGN.
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