Oldorid spiral ducts consist in a coated foldable tissue of high quality and are fixed inside a spiral of a spring steel wire.

Regardless to the bending, their cross section remains constant.

Our spiral ducts are suitable as well for over- as for underpressure. The extended duct has a length of 5 to 10 meters. The diameter various from 250 to 1800 mm diameter. The spiral winding distance can be delivered produced from 150 to 30 mm.

5 to 10 m

A spezial production can be delivered any time upon request

250 to 1.800 mm

30, 50, 75 or 150 mm

Tunnel Quality T 4/4 a. T 5/5
Mining Quality B 4/4 a. A 5/5

Coal mining –Bronze mining

Air conditioning

Tunnelling

Air ventilation in explosive endangered zones

Salt mining