Air flow regulator BB

The terminal boxes BBA/BBT are designed for single duct high velocity constant or variable flow rate applications and can be used both in supply (BBT) and exhaust (BBA).The air flow rate control is pressure independent and achieved by a precision engineered damper which modulates in response to a differential pressure sensor and a motorised electronic velocity control device. Direct communication is possible between the VAV boxes and the central control area. The volume control and the complete shut-off of the VAV box are obtained by the same damper.Taking into account the reduced pressure loss in the damper, the boxes need a minimum of inlet pressure which results in remarkable savings in the total energy requirements. designed for flow rates from 75 upto 6000 m3/h available in 7 sizes standard equipped with silencer; secondary silencer available optionally, a heat exchanger can be mounted on the box outlet Airflow type Variable, supply and extraction Shape Rectangular Air flow control Aluminum differential pressure sensor Length 1200 mm, 1400 mm, 1800 mm Min. height 255 mm Max. height 455 mm Min. width 250 mm Max. width 700 mm Frame size E25 (25 mm) Standard material Galvanised steel (275 g/m²) Blades Galvanised steel (275 g/m²) Insulation Casing: mineral wool 25 mm/Baffles: melamine Mounting options mounting brackets standard (4) Certification Casing: Class C (EN1751)/Damper: Class 3 (EN1751) Min. air velocity Defined @ 1,0 m/s Max. air velocity Defined @ 10 m/s Standard actuator Grada G1: 227VM-024-05/GRA Input signal 2-10V (standard), 0-10V