Non-return airflow damper BLD

for ships

Halton 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 approved Leakage class of closed damper up to class 2. Details available from Halton. Blades contain silicone seal to lower the leakage through blades Blades linked and open in parallel Adjustable by changing the position of counterweights. Standard construction places weights on the right hand side, weights on the left hand side available as an option. Maximum duct pressure for damper construction 5000 Pa and maximum air velocity 15 m/s. In case of high duct pressure, contact Halton Marine for finding the most suitable solution