The type CID-01 Isolation Damper has been specifically designed to meet the tightest shut- off requirements of the industrial and nuclear markets, where isolation of ducting for filter replacement or duct inspection is required, without shutting down complete systems.
The type CID-01 Isolation Damper has been specifically designed to meet the tight shut- off requirements of the industrial and nuclear markets, where isolation of ducting for filter replacement or duct inspection is required, without shutting down complete systems. These versatile dampers can be automatically or manually operated and can be supplied with pre-drilled flanges to ease installation.
The dampers may be installed vertically or horizontally with the air flow in one direction.
Each complete damper assembly is subjected to a works pressure test of 10,000 Pa for one hour. The upstream end of the damper is sealed during the test and the pressurizing source removed. After one hour the pressure is checked to ensure that it has not dropped taking into consideration any changes in air temperature.
The damper casing is formed from 3.0 mm thick sheet steel into a rigid channel section to ensure proper alignment of blades and shafts. Where circular dampers are required, additional spigot adaptors are used which increase the damper insertion length from 350 to 450 mm.
The blades are a formed single skin of 3.0 mm sheet steel fitted with a closed cell pad that seals against a frame within the damper casing to provide 100% isolation.
Continuous shafts Ø 19.05 mm with welded pivoted- blade support at each end.
Parallel action linkage consisting of drive levers and bosses connected by flat bar link bars, driven through stainless steel pins. All linkage is contained within the depth of the casing.
Phosphor bronze self-lubricated plain ‘Oilite’ bushes fitted into bearing bosses welded to the outside of the casing.
Lipseal type fitted into each bearing boss.
Part | Material | Finishing |
Case | Steel | Painted or Galvanised |
Case | Stainless Steel – 1.4307 (304L) Stainless Steel – 1.4404 (316L) |
– |
Blades | Steel | Galvanised |
Blades | Stainless Steel – 1.4307 (304L) Stainless Steel – 1.4404 (316L) |
– |
Shafts | Stainless Steel – 1.4307 (304L) Stainless Steel – 1.4404 (316L) |
– |
Bearings | Phosphor bronze self-lubricated plain ‘Oilite’ | – |
Other variations to suit clients’ specific requirements are also available. Please contact sales staff for further details
The Safety Function of the Isolation Damper when actuated is to close and control pressure system balancing or recirculation of air. The damper blades are fitted with a closed cell pad that seals against a frame within the damper casing to provide 100% isolation, allowing for work to be carried out within the duct network or stopping the spread of contaminates. Please note the damper is not bi-directional and air flow must be as shown in the general drawings above.
Please note the below table gives bare shaft damper weights only at the given square dimensions. Weights for specific sizes are issued on the quotation document.
Damper size (mm) | Est. weight | ||
Width/Dia. | Height | Depth | |
150 | 150 | 450 | 51 kg |
200 | 200 | 350 | 40 kg |
250 | 250 | 350 | 43 kg |
300 | 300 | 350 | 47 kg |
350 | 350 | 350 | 76 kg |
400 | 400 | 350 | 80 kg |
450 | 450 | 350 | 85 kg |
500 | 500 | 350 | 90 kg |
550 | 550 | 350 | 95 kg |
600 | 600 | 350 | 127 kg |
650 | 650 | 350 | 132 kg |
700 | 700 | 350 | 138 kg |
750 | 750 | 350 | 144 kg |
800 | 800 | 350 | 150 kg |
850 | 850 | 350 | 185 kg |
900 | 900 | 350 | 192 kg |
950 | 950 | 350 | 199 kg |
1000 | 1000 | 350 | 206 kg |
Dampers can be duct mounted, floor mounted, roof mounted, or bulkhead mounted depending upon the application.