Spiral door, type „EFA-SST®-Classic“, with electro-mechanical door drive unit for permanent industrial application

The door system consists of:

  • Self-supporting lateral steel frames;
  • Steel parts generally galvanized, and
  • Spiral-shaped door guidance

The load is transmitted on both sides: For achieving this, a synchronised shaft will be installed. For the exact, smooth and low-noise guidance of the hinge straps, ball-bearing precision rolling units have to be used. A sufficiently dimensioned tension spring mechanism, ensuring the weight balancing of the door leaf according to the standard DIN EN 12604 and a manual opening of the door (e.g. in the case of a power failure) is installed in the door frames.

Door leaf made of double-walled, Aluminium laths, which are fixed onto hinge straps and moved vertically (i.e. up or down), surface as anodised aluminium.

This SPIRAL BODY is designed to guide the laths of the door leaf completely without contact and thus without wear and with best possible noise reduction. The DOOR is driven by a geared motor. The door positions are registered by electro-mechanic limit switches positioned in the frame.

The MICROPROCESSOR CONTROL is installed together with the integrated frequency converter in a separate Steel switch cabinet, protection type IP 65. Connection to 230V 50 Hz power supply required on-site.

The scope of delivery includes a DOOR LINE GRID (EFA-TLG®), TÜV certified and in the direct door closing line: The safety system is integrated completely protected into the lateral frames and generates a light grid of infrared beams up to a height of 2.5 metres. Obstructions are detected without contact; the automatic closing movement is stopped immediately.

Product type : Door
Security / Safety : Infrared light curtain (EFA-TLG®), Locks automatically after each operating cycle
Manual release : Manual opening utilizing spring tension
Control : EFA-TRONIC® Professional in steel control box
Door blade : Extruded aluminium profiles, anodised E6/V1 or powder coating acc. to RAL
Finish : Galvanised steel, Optionally powder coating acc. to RAL
Spiral design : Spiral construction ensures fast, while quiet operation and Designed to minimise contact, reducing abrasion to the door blade

Width : 4000 mm
Light grid of infrared beams height : 2.5 metres
Height : 5000 mm

Cycles : Up to 250,000 operating cycles per year
Airborne sound insulation : 24 dB(A)
Heat insulation : 1.4 W/m²K
Power Supply : 230V 50 Hz
Closing Speed : approx. 0.6 m/s
Opening Speed : approx. 1.0 m/s

Resistance class WK 4 acc. : DIN V ENV 1627-1630:1999-04
Heat insulation : DIN EN 12428
Resistance to wind load : DIN EN 12424 up to class 4
Airborne sound insulation : DIN EN 7171
Tested and certified : IFT institute


Property OwnerDesign Professional

Doors_Industrial_EFAFLEX_Security-doors_EFA-SST-L Secure.dwg