RAFAVENT AXIAL FAN SUBFAMILY

Large-Diameter Agricultural Axial Fans

Low-pressure, high-airflow exhaust fans for poultry houses, livestock buildings, greenhouses and agricultural process spaces.

Calculated technical selection data

RAFAVENT large-diameter belt-driven agricultural axial fan with blue six-blade impeller, front guard and rear aluminium shutter — RAFAVENT large-diameter agricultural axial fan — representative belt-driven poultry ventilation configuration.

RAFAVENT RF-AGR SERIES

Agricultural & Poultry Exhaust Fans — Technical Selection Data

Wall-mounted axial exhaust fans designed for continuous air exchange at low system resistance; drive arrangement may be direct or belt-driven according to size and project duty.

RAFAVENT Engineering Calculation — Preliminary Selection — Non-Certified. Values are calculated at standard air density 1.20 kg/m³ using fan-law scaling and a low-pressure agricultural axial benchmark envelope. They are not laboratory-certified ratings. Final selection requires the actual pressure loss of shutters, guards, light traps, evaporative pads and building openings.

Construction and application

Galvanized or coated square housing with protective inlet guard and project-selected shutter or discharge cone.
Direct-drive or belt-driven aluminium, coated-steel or engineered-composite propeller; final blade material depends on corrosion, cleaning and duty cycle.
Standard clean-air agricultural basis −20 to +50 °C; humidity, ammonia, dust and wash-down exposure require a project material and motor-IP review.
Wall or framed-opening exhaust installation with sufficient make-up air; avoid recirculation and inlet blockage.

Size policy: the published standard calculated series is Ø560–Ø1000 mm. RAFAVENT has manufactured custom axial units up to Ø1700 mm, but Ø1250–Ø1700 models remain project-engineered and are not assigned standard performance values on this page.

Model selection table

Model	Ø mm	rpm	Recommended Q m³/h	Recommended Ps Pa	Max free-air Q	Shut-off Ps	Preliminary motor selection kW	Supply	Est. LpA @3m dB(A)	Approx. housing W × H × D mm	Est. kg
RF-AGR-560	560	960	7,101–9,833	16–50	10,925	86	0.55	230 V 1Ph / 400 V 3Ph	56 ±6	683 × 683 × 308	46
RF-AGR-630	630	960	10,111–14,000	21–63	15,555	108	0.75	230 V 1Ph / 400 V 3Ph	58 ±6	769 × 769 × 347	50
RF-AGR-710	710	960	14,472–20,039	26–80	22,265	138	1.1	230 V 1Ph / 400 V 3Ph	60 ±6	866 × 866 × 391	54
RF-AGR-800	800	720	15,527–21,499	19–57	23,888	98	1.1	230 V 1Ph / 400 V 3Ph	60 ±6	976 × 976 × 440	59
RF-AGR-900	900	720	22,108–30,611	24–72	34,012	124	1.5	400 V 3Ph	63 ±6	1098 × 1098 × 495	65
RF-AGR-1000	1000	720	30,326–41,990	29–89	46,656	153	2.2	400 V 3Ph	65 ±6	1220 × 1220 × 550	70

Recommended airflow and pressure describe a selection envelope, not opposite corners of one guaranteed operating point. Sound is estimated free-field A-weighted sound pressure at 3 m before wall reflection, shutter, cone, guard and building effects; uncertainty ±6 dB(A).

Calculated model curves

Six-point preliminary Q–Ps curves are provided for the standard series. Do not extrapolate beyond free-air flow or shut-off pressure.

RF-AGR-560 — calculated Q–Ps curve

Point	Q (m³/h)	Ps (Pa)
1	0	86
2	2,731	82
3	5,463	67
4	7,647	47
5	9,286	26
6	10,925	0

RF-AGR-630 — calculated Q–Ps curve

Point	Q (m³/h)	Ps (Pa)
1	0	108
2	3,889	103
3	7,778	84
4	10,889	59
5	13,222	32
6	15,555	0

RF-AGR-710 — calculated Q–Ps curve

Point	Q (m³/h)	Ps (Pa)
1	0	138
2	5,566	131
3	11,133	108
4	15,585	76
5	18,925	41
6	22,265	0

RF-AGR-800 — calculated Q–Ps curve

Point	Q (m³/h)	Ps (Pa)
1	0	98
2	5,972	93
3	11,944	76
4	16,722	54
5	20,305	29
6	23,888	0

RF-AGR-900 — calculated Q–Ps curve

Point	Q (m³/h)	Ps (Pa)
1	0	124
2	8,503	118
3	17,006	97
4	23,808	68
5	28,910	37
6	34,012	0

RF-AGR-1000 — calculated Q–Ps curve

Point	Q (m³/h)	Ps (Pa)
1	0	153
2	11,664	145
3	23,328	119
4	32,659	84
5	39,658	46
6	46,656	0

Selection requirements

Confirm required ventilation rate, building static pressure, shutter/cone/guard losses, pad condition, corrosive exposure, voltage, controls, duty cycle, permissible sound and cleaning method before order.

Technical documents, dimensions and service

Technical documents and dimensions

Final dimensions, connection details, materials, motor data and project drawings are issued for the selected configuration after engineering review.

Installation and maintenance

Provide level support, flexible connections, guarded drive components, alignment checks and safe maintenance access. Follow the approved project-specific O&M document.

Selection tables and calculated curves on this page are preliminary engineering guidance, not certified RAFAVENT test ratings. Confirm the operating point and controlled documents before order.

Information required before selection

Required airflow and static pressure
Operating temperature and conveyed-air composition
Installation orientation, space and connection details
Electrical supply, control method and duty pattern
Sound, material and environmental constraints

Request an engineering selection

Send the duty point, installation arrangement, operating conditions and available drawings for a project-specific selection.

Send project requirements