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Rectangular bends

Photo of product family: Rectangular  bends


Dimensions of rectangular bends are in accordance with types described in rectangular ducts.

Bends are characterized by application of radius as well for inside wall as for outside wall
of an installation while in bends external parts are made of two straight sections connected at 90° angle.

In the case of greater dimensions - more than 400 mm - guide parts are applied to enable a more uniform flow of air.

The number of guide parts depends on a width of a duct and amounts to 1, 2 or 3.

Rectangular bends - Products range
Miniature picture Product code Name of product Files to download
Photo of product Rectangular bends 90 degree QBF

Rectangular bends 90 degree


The 90˚ elbows are fitted with sheet angles, and the entire product
is braced by cross-wise ribbing.The elbows are recommended for low air
velocity and/or low-pressure ventilation systems and smaller sizes of
side b ≤ 400 mm. The standard radius is r = 120 mm.

Typical applications of the elbows include rerouting the ductwork by
90 degrees with the same clear cross-section.

Rectangular bends 90 degree
Photo of product Rectangular elbows with variable cross-section QBFR

Rectangular elbows with variable cross-section


The 90˚ elbows are fitted with sheet angles, and the entire product
is braced by cross-wise ribbing. The elbows are recommended for
low air velocity and/or low-pressure ventilation systems and smaller
sizes of side b ≤ 400 mm.
The standard radius is r = 120 mm.

Rectangular elbows with variable cross-section
Photo of product Rectangular radius elbows QB

Rectangular radius elbows


The standard 90˚ bends are fitted with sheet angles, have
an inner and outer rounding, and the entire product is braced
by cross-wise ribbing.

The bends are recommended for high air velocity and/or higher
pressure ventilation systems and greater sizes of side b > 400 mm.

The standard radius is r = 120 mm. The standard angle is a = 90˚.
Typical applications of the bends include rerouting the ductwork
by 90˚ with the same clear cross-section.

Rectangular radius elbows
Photo of product Variable Cross-Section Bend QBR QBR

Variable Cross-Section Bend QBR


The standard 90˚ bends are fitted with sheet angles,
have an inner and outer rounding, and the entire product
is braced by cross-wise ribbing.

The bends are recommended for high air velocity and/or higher
pressure ventilation systems and greater sizes of side b > 400 mm.
The standard radius is r = 120 mm. The standard angle is a = 90˚.
Typical applications of the elbows include rerouting the ductwork
by 90 degrees with the inner clearance varying along the elbow path.

Variable Cross-Section Bend QBR
Photo of product Rectangular elbows - diffuser QBR1

Rectangular elbows - diffuser


The standard 90˚ bends are fitted with sheet angles, have an inner
and outer rounding, and the entire product is braced by cross-wise
ribbing.

The bends are recommended for high air velocity and/or higher pressure
ventilation systems and greater sizes of side a > 400 mm.
The standard radius is r = 120 mm. The standard angle is a = 90˚.

Typical applications of the bends include rerouting the ductwork
by 90 degrees with the inner clearance varying in two planes along
the bend path. A diffuser bend does not require vanes.
The product can feature additional bracing with baffles on request.

Rectangular elbows - diffuser
Photo of product Rectangular offsets QPR3

Rectangular offsets


Offsets help bypassing obstacles along the ductwork route, e.g.
at intersections of two ducts.

The ends are fitted with sheet angles, and the entire fitting is braced
by cross-wise ribbing.To achieve the required air flow rate, appropriate
length sizes l and offset sizes e should be used.

Rectangular offsets
Photo of product Offsets with rectangular cross-section QPR4

Offsets with rectangular cross-section


Variable diameter offsets facilitate bypassing obstacles along
the ductwork route while changing the connected duct height, which
helps building intersections of two ducts.

The ends are fitted with sheet angles, and the entire fitting is
braced by cross-wise ribbing. To achieve the required air flow rate,
appropriate length sizes l and offset sizes e should be used.

Offsets with rectangular cross-section
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