

Class 4 blade airtightness and ATC1 casing airtightness certified according to EN 1751 (formerly Class C)
Ideal for nuclear facilities and high-containment laboratories
Very low upstream/downstream leakage rates
CI
- Rectangular
- Nuclear-grade rectangular damper


Description
The CI shut-off damper is a high-airtightness damper certified to Class 4 blade airtightness and ATC1 casing airtightness (formerly Class C) in accordance with EN 1751. It is specifically designed to isolate sections of ventilation ductwork in sensitive installations and environments with stringent hygiene requirements.
Thanks to its reinforced and fully dismantlable design, the CI damper is ideally suited to industrial HVAC applications, process ventilation systems, and technical installations operating under demanding conditions.
Manufactured from galvanized steel or stainless steel, the CI damper provides excellent mechanical strength and high corrosion resistance for harsh industrial environments.
Thanks to its reinforced construction, the CI damper is particularly suitable for industrial ventilation systems operating at high pressures and air velocities.
Construction
- Type: Ultra-high-airtightness shut-off damper
- Function: Ventilation ductwork shut-off
- Minimum size: W 200 × H 250 mm
- Maximum size: W 1000 × H 1000 mm
- Blade airtightness: Class 4 according to EN 1751
- Casing airtightness: ATC1 according to EN 1751 (formerly Class C)
- Maximum operating pressure: 5,000 Pa
- Operating temperature range: -20°C to +120°C
- Materials: Galvanized steel or stainless steel
- Actuation: Electric or pneumatic
Performances
Airtightness
- Blade airtightness: Class 4 according to EN 1751
- Casing airtightness: ATC1 according to EN 1751 (formerly Class C)
- Pressure rating
The CI damper is designed to withstand differential pressures of up to 5,000 Pa with a 1,000 mm blade length in the galvanized steel version.
Operating temperature range
Standard: -20°C to +120°C
Applications
- Cleanrooms
- Biosafety Level 4 (BSL-4) laboratories
- Pharmaceutical industry
- Operating theatres
- Healthcare environments
- Electronics industry
- Critical HVAC systems
- High-airtightness HVAC systems
- Ventilation ductwork shut-off
Class 4 blade airtightness and ATC1 casing airtightness certified according to EN 1751 (formerly Class C)
Ideal for nuclear facilities and high-containment laboratories
Very low upstream/downstream leakage rates
Need help?
Need help finding the right solution for your needs?
Our teams are available Monday to Thursday from 8 a.m. to 5:30 p.m. and Friday from 8 a.m. to 4:30 p.m.