RAFAVENT HATCH FAN SERIES

Hatch Fans

High-volume axial fan units integrated with a wall or roof hatch/shutter arrangement for industrial and agricultural ventilation.

Preliminary engineering selection

Calculated guidance only. Final hatch geometry, actuator, guards, weather protection, duty and any smoke/fire classification require project-specific approval and evidence.

Two separate curve limits, not a duty point: maximum airflow and shutoff pressure occur at different operating conditions and must not be specified together. The points below are preliminary calculated estimates, not measured or certified performance. Select only a reviewed airflow–pressure pair for the exact speed, air density, hatch position and installation. Shutoff is not an approved continuous operating condition.

Model	Opening (mm)	Calculated free-air flow at Ps = 0 (m³/h)	Calculated shutoff static pressure at Q = 0 (Pa)	Motor (kW)
RF-HF-800	800	28,000	160	5.5–7.5
RF-HF-1000	1000	45,000	180	7.5–11
RF-HF-1400	1400	90,000	150	15–18.5

RF-HF-800 — Calculated Q–Ps curve

Q (m³/h)	Ps (Pa)
0	160
7000	150
14000	122
21000	69
28000	0

RF-HF-1000 — Calculated Q–Ps curve

Q (m³/h)	Ps (Pa)
0	180
11250	169
22500	137
33750	77
45000	0

RF-HF-1400 — Calculated Q–Ps curve

Q (m³/h)	Ps (Pa)
0	150
22500	141
45000	114
67500	65
90000	0

Hatch and safety definition

Item	Project definition
Hatch / shutter	Opening direction, free area, fail position
Actuator	Voltage, torque, end switches, manual release
Guards	Inlet and discharge protection
Weather protection	Rain, wind and corrosion environment

Control and verification

State	Required verification
Start command	Fan and hatch interlock
Open feedback	Fan enabled only at safe opening
Stop / fault	Defined safe position and alarm
Commissioning	Airflow, pressure, current and opening time

Information required before selection

Airflow and static pressure
Wall or roof opening and available depth
Supply/extract direction and weather exposure
Power, actuator and control sequence
Sound, guards, corrosion and certification requirements

Performance Curve

The published table lists two independent calculated curve limits for each model; these are not simultaneous duty points. A final P–Q curve is released only after the hatch free area, opening angle, guards, weather protection and system resistance are confirmed.

Project-specific engineering status: The tabulated curves above are preliminary calculated estimates, not certified performance. Final performance documentation is configuration-specific.

Dimensions

Published clear-opening sizes are 800, 1000 and 1400 mm. Final external frame, hatch depth, actuator envelope, fixing centres and service clearances are confirmed on the approved GA drawing.

Construction & Materials

Fan casing, hatch or shutter, protective guards, weather protection, actuator interfaces, coating and corrosion class are selected for the installation environment and recorded in the material schedule.

Drive Arrangement

Motor power is stated in the preliminary model table. Direct, belt or other drive arrangement is not claimed universally and is confirmed for the selected fan–hatch assembly.

Send project requirements