Metal duct system

Air ducts are designed to transport air of the ventilation system.
OS3-d (spiral) made out of galvanized band steel, L-3000 mm. When air duct is manufactured are designed to be outside the duct, in this way vortexes are avoided to form inside the ducts. Furthermore, due to this design, air flow loss is reduced to minimum. Medium and higher diameter range ducts are harden with two small low angle pressed curvatures. 

Angle 90°;
Pressed;
With insertable joints to duct;
With gaskets.

Angle 45°;
Galvanized or stainless steel;
Made of segments;
With insertable joints to duct;
With gaskets.

Couplings are designed to join two air ducts or two joints.
MT-d inner, has both ends for inlet connection. MI-d has on a both sides enveloping connections.  
Couplings are made from galvanized steel. 

Galvanized or stainless steel;
With insertable joints to duct;
With gaskets.

T-pieces are designed to connect different or same diameter circular ducts. TRT-D-d T-piece connects main line with secondary line in 90 degrees angle. TRT-45-D-d T-piece connects main line with secondary line in 45 degrees angle. TRKT-D-d is used when main line is splited into two seperate lines. T-piece units are made from galvanized sheet metal with insertable connections to duct.
 

Galvanized or stainless steel;
With insertable joints to duct;
With gaskets;
Diameters, mm: 100, 125, 160, 200.

AGRJ damper - a round manually adjustable damper.
The indicated price is a control valve without an actuator.