Backward-Curved Double-Inlet Centrifugal Fans
Product overview
Double-inlet centrifugal arrangement for duties requiring balanced two-sided air entry.
RAFAVENT CENTRIFUGAL FAN SUBFAMILY
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RAFAVENT RF-CF-BCD SERIES
Double-width, double-inlet backward-curved centrifugal fans for AHUs, base-mounted ventilation assemblies and large-volume MEP air systems.
Double-width scroll casing with two unobstructed inlets and a backward-curved steel impeller.
Shaft carried by bearings on both casing sides; bearing selection, service access and lubrication arrangement are confirmed by order.
Belt-drive preliminary basis with motor on base frame. State drive side when viewed from the inlet and confirm rotation/discharge orientation.
Three-phase IEC motor basis, IP55 and Class F specification subject to the approved motor datasheet.
Clean or lightly dust-laden non-corrosive air, preliminary ambient duty −20 to +50 °C. No ATEX, smoke or high-temperature certification is claimed.
Standard model series Ø200–Ø800. Larger construction up to Ø1600 is custom capability only after engineering review and is not a standard catalogued model.
Recommended flow and pressure ranges define an intended preliminary selection envelope; they are not opposite corners of a guaranteed duty point. Estimated free-field A-weighted sound pressure at 3 m has ±6 dB(A) uncertainty before casing, duct, reflection, inlet, outlet, belt guard, silencer and system effects.
Open a model to view its six-point preliminary Q–Ps curve.
Confirm airflow, static pressure, air density, temperature, conveyed-air composition, both inlet conditions, base/AHU arrangement, drive side, rotation and discharge position, pulley ratio, motor voltage, control method, corrosion class, permissible sound level, access space and accessories before order.
Final dimensions, connection details, materials, motor data and project drawings are issued for the selected configuration after engineering review.