NK-SL

Ventilation element Louvre flap with spring return motor

	NK-SL-FR-RJ-300x400-0,1	NK-SL-FR-RJ-400x400-0,13	NK-SL-FR-RJ-500x500-0,2	NK-SL-FR-RJ-600x600-0,3	NK-SL-FR-RJ-800x800-0,52
Net ventilation aera	0.10 m²	0.13 m²	0.20 m²	0.30 m²	0.52 m²
Max. ventilation opening (BxH)	300 x 400 mm	400 x 400 mm	500 x 500 mm	600 x 600 mm	800 x 800 mm
Construction depth	120 mm	120 mm	120 mm	120 mm	120 mm
Hollow louvre	Aluminium	Aluminium	Aluminium	Aluminium	Aluminium
Seal	EPDM rubber profile	EPDM rubber profile	EPDM rubber profile	EPDM rubber profile	EPDM rubber profile
Material	Profiled sheet steel, dimensionally stable	Profiled sheet steel, dimensionally stable	Profiled sheet steel, dimensionally stable	Profiled sheet steel, dimensionally stable	Profiled sheet steel, dimensionally stable
Thickness	1 mm	1 mm	1 mm	1 mm	1 mm
Supply	24 V AC/DC	24 V AC/DC	24 V AC/DC	24 V AC/DC	24 V AC/DC
Torque	20 Nm	20 Nm	20 Nm	20 Nm	20 Nm
Sound power level	Opening via spring return ≤ 62 dB	Opening via spring return ≤ 62 dB	Opening via spring return ≤ 62 dB	Opening via spring return ≤ 62 dB	Opening via spring return ≤ 62 dB
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Art. No.	31.621.50	31.621.51	31.621.52	31.621.53	31.621.54
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Surface-mounted installation on shaft wall, shaft cover and duct possible
Larger ventilation area due to deeper housing (free movement of the louvres and increased air flow between the louvres)
Aerodynamic and torsionally stiff hollow aluminium blades
Safety function due to spring return in the motor in the event of a power cut
Particularly suitable for lift shafts and service shafts

Designs and technical data