Product Profile of Non Return Damper

The Non Return Damper, under the Model ANRD-W is designed to maintain a constant pressure level inside pressurized rooms by relieving excess air when it exceeds the desired limit. This damper is generally installed on diesel generator, plant rooms’ ventilation system and exhaust ducting. Non Return Damper is manufactured by Airmaster Flowtec Private Limited.

Airmaster Flowtec Private Limited, an ISO9002 registered organization that offers Perforated Ceiling Diffusers, Plenum Box, Round Ceiling Diffusers, Sand Trap Louvers, Volume Control Dampers, Fusible Link Fire, Jet Nozzles, Smoke & Fire Dampers, Light Troffer Diffusers, etc. The Non Return Damper is available in square and rectangular sizes. The sizes available are 100 X 100 mm with an increment of 50 mm.

Construction of the Non Return Damper is:

• Frame: High quality extruded aluminium profile with 30 mm flange width as standard. 12, 16, 24 mm flange widths are optional.

• Blades: Aluminium sheet as standard. GI sheet as options.

• Blade supports: Self oiling nylon bushings with 8 mm diameter aluminium rods.

• Blade seals: Foam gasket for air tightness.

• Blade stopper: 20 mm X 20 mm aluminium angle.


Descriptions of the Non Return Damper are:

• Frame is of high quality extruded aluminium profiled construction with the advantages of corrosion resistance and rigidity.

• Air operated damper blades are fixed to the frame by self oiling nylon bushes with 8 mm diameter aluminium pipes.

• Blades are sealed with foam gasket at the bottom to avoid rattling noise and to provide air tight operation.

• Blades open full or to any angle depending on the air velocity. Blades stay in position of opening without fluctuating when there is constant air flow. The blades close quietly when the air flow stops.


Standard finishes of Non Return Damper are:

• Natural anodized aluminium finish.

• Powder coated color finish as per RAL color codes.

• Flexibility of finishing as available as option.