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Home / Grilles / Double deflection grille for circular ducts RA
grila rectangulara RA

Double deflection grille for circular ducts RA

  • Description
  • Tehnical specifications
  • Functional Parameters
  • Accesories
  • Installation

Description


RA is a rectangular grille, made of galvanized steel, with two rows of adjustable blades.
The grille is recommended for longitudinal mounting on rigid circular duct.
It is used for introduction and evacuation of air in ventilation and air conditioning systems.

The grille is equipped with two rows of individually adjustable blades that allow the directing of the air jet.
The front blades are parallel to the height and the ones positioned in the background are parallel to the length of the grille.
The product is delivered with a sealing gasket positioned on the frame, mounting holes and fixing screws.


Technical drawing


   

The legend
Ak [m²] - The free surface
X [m] - The length of the air jet at a speed of 0.25 m/s
NR [dB (A)] - Noise level without room attenuation
Veff [m/s] - The effective velocity of air in the grille
∆Pt [Pa] - Pressure loss

For more sizes see the Technical Data Sheet (bottom of the page).

Opposed blade damper (OBD)


The damper is provided with opposable blades and gears, it is mounted on the grille connection.
 

Longitudinal installation on rigid circular duct. Fixing the grille is done with screws.

Installation on circular duct
 

Documentation

  • Double deflection grille for circular ducts RA - Technical Data Sheet

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