RAFAVENT FAN FAMILY

Industrial Plug Fans

Plug-fan arrangements for integration into air-handling or process enclosures.

Preliminary engineering data

RAFAVENT RF-PF-BC-D SERIES

Industrial Plug / Plenum Fans — Technical Selection Data

Direct-driven, free-running backward-curved impellers for integration into AHU, ventilation and process plenums.

RAFAVENT Engineering Calculation — Preliminary Selection — Non-Certified. Values are calculated at 20 °C and standard air density 1.20 kg/m³ using fan-law scaling and engineering assumptions. They are not laboratory-certified ratings. Final selection requires a confirmed duty point, actual plenum geometry, inlet condition, motor cooling review and approved production drawing.

Construction and integration basis

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.

Model selection table

Model	Wheel Ø mm	Nominal max rpm	Recommended Q m³/h	Recommended Ps Pa	Calculated max Q	Calculated shutoff Ps	Est. shaft kW	Preliminary motor selection kW	Supply	Assembly LpA; test data required	Drive basis
RF-PF-BC-D-250	250	2800	570–1,335	261–696	1,628	870	0.26	0.37	230/400 V 3Ph	Test data required	Direct IEC/VFD or engineered EC option
RF-PF-BC-D-280	280	2500	715–1,674	261–696	2,042	870	0.33	0.55	230/400 V 3Ph	Test data required	Direct IEC/VFD or engineered EC option
RF-PF-BC-D-315	315	2200	895–2,098	256–683	2,558	853	0.41	0.55	230/400 V 3Ph	Test data required	Direct IEC/VFD or engineered EC option
RF-PF-BC-D-355	355	1950	1,136–2,661	255–681	3,245	851	0.51	0.75	230/400 V 3Ph	Test data required	Direct IEC/VFD or engineered EC option
RF-PF-BC-D-400	400	1750	1,458–3,416	261–696	4,166	870	0.68	1.1	230/400 V 3Ph	Test data required	Direct IEC/VFD or engineered EC option
RF-PF-BC-D-450	450	1550	1,839–4,308	259–691	5,254	864	0.85	1.1	230/400 V 3Ph	Test data required	Direct IEC/VFD or engineered EC option
RF-PF-BC-D-500	500	1400	2,278–5,338	261–696	6,510	870	1.06	1.5	230/400 V 3Ph	Test data required	Direct IEC/VFD or engineered EC option
RF-PF-BC-D-560	560	1250	2,858–6,696	261–696	8,166	870	1.32	2.2	230/400 V 3Ph	Test data required	Direct IEC/VFD or engineered EC option
RF-PF-BC-D-630	630	1100	3,581–8,390	256–683	10,232	853	1.63	2.2	230/400 V 3Ph	Test data required	Direct IEC/VFD or engineered EC option
RF-PF-BC-D-710	710	980	4,567–10,699	258–688	13,048	860	2.09	3	230/400 V 3Ph	Test data required	Direct IEC/VFD or engineered EC option
RF-PF-BC-D-800	800	880	5,866–13,744	264–704	16,761	880	2.75	4	400/690 V 3Ph	Test data required	Direct IEC/VFD or engineered EC option

Verified acoustic performance for this configuration has not been published. The previous 56–61 dB values and assumed ±6 dB uncertainty have no documented test basis and are not valid acoustic selection ratings. The lined enclosure is intended to reduce casing-radiated sound; inlet and outlet attenuation depends on ductwork and silencers. Compare enclosed and bare-core configurations at the same airflow, pressure, speed and installation conditions. LwA is sound power and LpA is sound pressure; LpA also requires distance, measurement environment and sound path. Specify frequency bands and test method. Tabulated speed is a calculation reference, not an approved maximum mechanical speed.