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 Pressure Relief Damper  A to Z Products
 Introduction
 
“COSMOS” Non‐return / Pressure relief / Gravity / Back draft dampers have been specifically designed for use in Air‐conditioning and Ventilation system, these dampers are air operated and are used for air intake and exhaust, and are also used for pressure relief.

Non‐return / Gravity / Back draft dampers can either be operated by gravity (where pressure or velocity opens and closes the damper) or be motorized to open and close when required. These dampers are composed of a set of horizontally mounted blades, they are normally closed and are free to rotate about the horizontal axis. The blades are manufactured from light weight aluminum sheets. Frame is manufactured from high quality aluminum as well as from galvanized steel.

Damper selection begins by determine the damper construction required based on system velocity and static pressure. While selecting the correct damper for our application, we need to know following

System velocity and back pressure requirements.
Mounting orientation and airflow direction.
Mounting configuration ( Inserted into duct / opening or flange mount )
Damper operation ( gravity or motorized )
A galvanized / aluminum angle is fitted internally to main frame to avoid over movement of blades.
 
 Features
 
Five basics decisions are required to select the damper
 
The casing frame is fully sealed robust and rigid assembly formed out of best quality aluminum sheets / galvanized sheet steel of 1.2 mm thickness.
Fully sealed low leakage blades are formed out of high quality light weight aluminum sheets of 1.0 mm thickness.
The bearings are made of PVC/Nylon to give smooth and rattle free operation.
The blades are fitted with galvanized steel connecting spindle to main casing / frame for rigid and strong construction for rattle free and smooth operation due to variable air pressure.
A galvanized / aluminum angle is fitted internally to main frame to avoid over movement of blades.
 
 COSMOS Models
 
Back Draft Damper Presssure Relief damper Non Return Damper Gravity Louver
BDD‐F PRD‐F NRD‐F GRL‐F
BDD‐R PRD‐R NRD‐R GRL‐R
BDD‐C PRD‐C NRD‐C GRL‐C
BDD‐F‐G PRD‐F‐G NRD-G GRL‐F‐G
BDD‐R‐G PRD‐R‐G NRD‐R-G GRL‐R‐G
BDD‐C‐G PRD‐C‐G NRD‐C ‐G GRL‐C‐G
BDD‐H‐G PRD‐H‐G NRD‐H‐G GRL‐H‐G
 
 Standard Sizes
 
Hmm 100 200 300 400 500 600 700 800 900 1000 1200
Lmm 100 150 200 300 400 500 600 700 800 900 1000
 
***Also available in 25mm increments of any combination of H X L.
 Features
 
19" rack mountable or table top version Front and rear screw less
Single depth extrusions with decorative grooves Optimised usable height for 1u and 2u subracks
Softline with minmum screws    
 
 Construction
 
Aluminium special alloy extrusions and sheets
Screw type construction
Aluminium or CRCA base plate for components
Card racks with GFN guides for PCBS - EURO / VME / CPCI
Legs - plastic
 
 Compliance
 
IEC 297 and DIN41494
IEEE 1101.10 / 11
IEC 297 and DIN41494
IEEE 1101.10 / 11
 Products
 
Aluminium special alloy extrusions and sheets
Screw type construction
Aluminium or CRCA base plate for components
Card racks with GFN guides for PCBS - EURO / VME / CPCI
Aluminium special alloy extrusions and sheets
Screw type construction
Aluminium or CRCA base plate for components
Card racks with GFN guides for PCBS - EURO / VME / CPCI
Legs - plastic
Aluminium special alloy extrusions and sheets
Screw type construction
Aluminium or CRCA base plate for components
Card racks with GFN guides for PCBS - EURO / VME / CPCI
Legs - plastic
Aluminium special alloy extrusions and sheets
Screw type construction
Aluminium or CRCA base plate for components
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