Description
A back draft and pressure relief damper is a self-acting HVAC damper that opens under intended airflow and shuts automatically as soon as air tries to flow backwards, protecting fans, ducts and occupied spaces from reverse flow and over-pressure. Built by MEK, a steel manufacturer since 1921, and available from MEK Uganda for commercial, industrial and residential ventilation projects.
Key Features
- Prevents reverse airflow: blades open for normal flow and close automatically on back flow
- Spring-loaded or gravity-operated blades
- Galvanised steel, aluminium or stainless steel construction; lightweight
- Inline or wall mounting, with optional flanges or brackets
- Neoprene or silicone perimeter gaskets for tight sealing
- Pressure ratings from low-pressure residential to high-pressure industrial duty
- Some models with removable blades or access panels for maintenance
- Optional insect screens, bird guards, weather hoods and actuators
Technical Specifications
- Sizes: 6″ to 144″
- Process temperature: Up to 2200°F
- Configurations: Round, square, rectangular
- Construction: Stainless steel or painted carbon steel (others on request)
- Shutoff: Up to 99%
- Seal options: Tadpole, metal seat, swing-through
- Actuation: Manual, electric or pneumatic; spring return and failsafe available
- Modulation: Open/closed or modulating
- Pressure and velocity: Up to 1 PSI and 4000 FPM process air (higher on request)
- Bearings and packing: Ball bearings and shaft packing glands standard up to 400°F
Applications
- Exhaust and supply air openings in commercial buildings and offices
- Factory and industrial process ventilation
- Hospitals and healthcare facilities (healthcare-certified models available)
- Cleanrooms and controlled environments
- Residential ventilation systems
Frequently Asked Questions
What does a back draft damper do?
It allows air to pass in one direction only. The blades open under normal airflow and close automatically, by spring or gravity, when air starts to flow the wrong way.
What sizes and materials are available?
Sizes range from 6″ to 144″ in round, square or rectangular configurations, in stainless steel or painted carbon steel, with galvanised steel and aluminium versions also offered.
Can I get a price for a back draft damper?
Pricing depends on size, materials and quantity. Contact MEK Uganda for a quotation based on your project requirements.
To request a quotation or technical consultation, contact MEK Uganda at sales@mek.co.ug.
