air outlets | Ceiling Diffuser
Stamped Swirl Diffuser
Construction
Frame
Made from High Quality extruded aluminum Profile with 30 mm flange
width1.2 mm (or)1.5 mm thick aluminum sheet.
Blade
A radial array of deflection blades are pressed into a square panel.
Neck
Standard size 250 dia.
Module
Plenum
20 gauge (or) 22 gauge thick GL sheet.
Description
The frame and blades are made from high quality extruded aluminum profiled construction with Powder coated color finish.
Supply swirl diffuser and return swirl diffuser can be supplied with volume damper to control static pressure and the air volume flow rate; installed in plenum box.
The fixed swirl diffuser used for the supply of cooled or heated air.
A high induction is obtained by the exceptional swirl discharge this quickly reduces the difference in temperature and velocity of the induced air.
Suitable for VAV terminal boxes.
This diffuser can also be used for exhaust.
Foam gasket is sealed around the back of the frame as option to avoid air leakage.
Powder coated color finish per RAL color codes as standard and flexibility of finish.
Variants
FSD – Q :
Square diffuser face
FSD – R :
Circular diffuser face
Connection
H:
Horizontal duct connection
V:
Vertical duct connection
Parts & Characteristics
Circular or square diffuser face.
Diffuser faces with radially arranged fixed air control blades.
Plenum box for supply air with an optimized equalizing element that ensures a uniform airflow through the diffuser face.
Simple installation of the diffuser face due to central fixing screw with decorative cap.
Damper blade for volume flow rate balancing ( optional ).
Attachments
Damper blade for volume flow rate balancing or square diffuser face.
Pressure tap and cord – operated damper blade for volume flow rate balancing with the diffuser face in place.
Accessories
Lip seal.
Materials & surfaces
Diffuser face made of galvanized sheet steel.
Plenum box and cross bar made of galvanized sheet steel.
Plenum box and made of plastic and galvanized sheet steel.
Lip seal made of rubber.
Diffuser face powder – coated RAL 9010 pure white or any other color code.
Dimension
Technical Information
Ceiling swirl diffusers in air conditioning systems create a swirl to supply air to rooms.
The resulting airflow induces high levels of room air, thereby rapidly reducing the airflow velocity and the temperature difference between supply air and room air.
Ceiling swirl diffusers allow for large volume flow rates.
The result is a mixed flow ventilation in comfort zones, with good overall room ventilation, creating only very little turbulence in the occupied zone.
Type SWF ceiling swirl diffusers have fixed blades.
Air discharge is horizontal Omni directional.
The supply air to room air temperature difference may range from -12 to +10 K.
A damper blade (optional) simplifies volume flow rate balancing for commissioning.
Pressure tap and cord-operated damper blade (optional) allow for volume flow rate balancing with the diffuser face in place.
To give rooms an aesthetic, uniform look, Type SWF diffusers may also be used for extract air.
Plenum Box
Selection
Data obtained from tests conducted in accordance with ANSI/ASHRAE standard 70-2006. Actual performance with flexible duct inlet, may vary in the field.
Throw values given are for terminal velocities of 150, 100 and 50 fpm and for isothermal conditions.
Each NC value represents the noise criteria curve that will not be exceeded by the sound pressure in any of the octave bands, 2 through 7, with a room absorption of 10 dB, re 10-12 watts.
Dash (-) in space denotes an NC Value of less than 10.
All pressures are given in inches of water.
To obtain static pressure, subtract the velocity pressure from the total pressure.
How to order
