Fusible Link Operated Fire Dampers RC-400V

The fusible link operated fire dampers are designed to provide 4-hour fire-resistance with low air leakage and low resistance to air flow.

Features

• EASY TO INSTALL Series RC-400V fire dampers are supplied with sleeve and retaining angles. Hence it can be installed quickly. • ROBUST CONSTRUCTION Sleeves are contructed of heavy gage galvanised steel fully welded. Unlike most other fire dampers the RC400V fire damper is very rigid and does not warp during handling. • 4-HR RATING & LOW LEAKAGE RCV 400V fire damper was tested by the Experimental Building Station of Australia to Australian Standards AS1682-1974: “Fire damper” for air leakage; and AS1530, Part 4-1979: “Fire Resistance Test of Structure”. The fire damper was tested for 4 houors. Unlike other curtain type fire dampers, it has been designed for low air leakage. • FLEXIBITY Series RC400V fire dampers have three variations which make them suitable for low, medium and high velocity systems. It can be easily adapted to round or oval ducts. Due to its low air leakage it may be used with appropriate external actuating device or ETL electro thermal link to serve as a smoke damper. • LOW AIR RESISTANCE Where static pressure loss is an important consideration, a collar may be fitted to the damper sleeve such that the blade stack and blade guides are entirely out of the air stream.

Types of Dampers

TYPE A Type A damper is for wall openings or for use with low velocity rectangular ductwork. when used with rectangular duct, the damper is the same nominal size as the duct.

TYPE B Type B damper is for use with low velocity rectangular duct where it is desirable to keep the blade stack out of the air stream. When the damper is open, the stack of blades is entirely contained within an enclosure above the duct but the damper sleeve width is the same as the duct width.

TYPE C

Round

Flat-Oval

Rectangular

All type C dampers are for use in high velocity ducts. The dampers have collars of fitting size on both sides of the dampers sleeve for attaching the duct. When a Type C damper is open, the blade stack and the blade guides are entirely out of the air stream, this providing a totally unobstructed flow area with a minimum of pressure drop across the damper.
The Type C damper is designed for use in medium and high velocity systems where static pressure loss can be an important consideration.

Construction

1.	Sleeve – 2.5mm galvanised steel fully welded at the corners.
2.	Retaining angles – 2.5mm galvanised steel with slotted holes for minor adjustments to suit the wall thickness. 25 × 38mm angles for sizers smaller than 300 × 300mm. 38 × 38mm angles for sizes larger.
3.	Blade – rollformed from 1.0mm-thick galvanised steel sheet. Blade assembly is fasted to the top of the sleeve with steel rivets.
4.	Blade guide – cold formed 1.2mm-thick tack welded to the sleeve serve to increase the rigidity of the damper.
5.	Top and bottom channels-cold formed channel tack welded to the sleeve serve to increase the rigidity of the damper.
6.	Fusible link-standard type 165°F

Go Back