EN
Backdraft Damper (Check Valve)
- Target Customers: Fan outlets, exhaust pipes, HVAC ducts
- Core Advantages: Reliable sealing; Simple structure; Low resistance
- Core Keywords: Backdraft damper, check damper
- Overview
- Product Advantages
- Application Scenarios
- Faq
- Recommended Products
The check valve is a gravity-operated backdraft damper preventing reverse airflow. Duct sizes 200×200 to 2000×1250 mm. Gravity or counterweight. Aluminum or galvanized blades.
Product Advantages
-
Reliable sealing: Blades close tightly under gravity, no reverse flow.
-
Low pressure drop: Minimal obstruction when open.
- Simple & maintenance-free: No springs or actuators to fail.
Application Scenarios
- Fan discharge to prevent backdraft
- Exhaust louver behind wall grilles
- HVAC supply ducts with multiple fans
- Air handling unit discharge
FAQ
Q1: Can it be installed horizontally?
– Yes, with spring assist.
Q2: What is the maximum velocity?
– 15 m/s.
