Acoustic Silent-Box Fans
Product overview
Enclosed fan units with an acoustic casing, documented by the selected construction and duty.
RAFAVENT INLINE & ACOUSTIC SUBFAMILY
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RAFAVENT RF-PF-BC-D SERIES
Backward-curved direct-drive plug-fan cores integrated inside an acoustically treated service enclosure.
Backward-curved welded steel wheel, direct-driven without a scroll casing; inlet cone and mounting frame are part of the aerodynamic assembly.
IEC motor with VFD is the standard engineering basis. An EC motor option requires model-specific availability, controller and thermal verification.
Motor rated output is listed, not absorbed electrical input. Motor cooling must be checked for motor-in-air-stream, motor-out-of-air-stream and low-speed VFD operation.
Provide uniform, swirl-free inlet flow. Confirm inlet-cone overlap and running clearance before release.
Minimum preliminary plenum clearance: 0.5 wheel diameter from the nearest discharge obstruction and 1.0 diameter of unobstructed inlet approach; final spacing requires arrangement review.
Wheel balancing and assembled vibration acceptance are required before dispatch.
Clean-air preliminary duty −20 to +50 °C. No ATEX, smoke, fire or high-temperature certification is claimed.
Standard series Ø250–Ø800. Sizes Ø900, Ø1000 and Ø1120 are custom only after structural, shaft, bearing, drive and plenum review.
Recommended ranges avoid the extreme ends of the calculated curve. Selected motor includes a preliminary 15% margin. Estimated sound at 3 m has ±6 dB(A) uncertainty before plenum, inlet, duct, attenuation and room effects.
Open a model to view its six-point preliminary Q–Ps curve.