Non-return damper – BLD for offshore and marine ventilation systems
The BLD non-return dampers are used in offshore and marine applications to prevent backflow through ventilation ductwork system. The BLD dampers do not need an actuator or motor. Non-return dampers can be installed in rectangular or circular ducts, horizontally or vertically.
If required, they can easily be set by adjusting the weight of each damper/installation.
When the blades are in the open position, the device does not cause significant pressure loss, noise or flow disturbance.
Fixed frame in painted, galvanized or stainless steel. Blades of galvanized or stainless steel.
Models for horizontal or vertical installation
Available as ATEX certified
Leakage class (EN1751:2014) of closed damper up to class 2
Blades contain silicone seal to lower the leakage through blades
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