Duct OS3-100 3 meters

OS3-d (spiral) made of galvanized strip steel, L-3000 mm.

The multilayer seams of the spiral ducts are concentrated on the outside of the product,

which prevents the air flow from twisting relative to the axis of the air duct.

The ducts are characterized by low pressure losses.

Spiral ducts of medium and larger diameters are stiffened by two external spiral ridges of low steepness.