Non-Return And Pressure Relief Dampers
BLD NON-RETURN DAMPER
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 according to EN 1751 class 2. Tested size 1000×1000 mm.
• 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 Marine for finding the most suitable solution.
BRD PRESSURE-RELIEF DAMPER
BRD pressure-relief dampers are used in offshore and marine applications to prevent backflow through ventilation ductwork system.
The pressure relief dampers do not need an actuator or motor.
The BRD dampers can be installed in rectangular or circular ducts horizontally or vertically.
Opening pressure can easily be set by adjusting weight of each damper/installation.
Weights are included in the delivery.
Pressure relief dampers can be supplied with non-standard dimensions on request.
• Fixed frame in painted, galvanized or stainless steel. Blades of galvanized or stainless steel.
• Models for horizontal or vertical installation
• Blades contain silicone seal to lower the leakage through blades • Available as ATEX approved
• Leakage class of closed damper according to EN 1751 class 2. Tested size 1000×1000 mm.
• Blades linked and open in parallel
• Opening pressure adjusted by changing the position of counterweight(s)
• Opening pressure range between 30 Pa and 150 Pa (up to 300 Pa optional)
• Counterweights included
• Standard construction places weights on the right hand side, weights on the left hand side available as an option
• Final adjustment of counterweights carried out during commissioning
• Maximum duct pressure for damper construction 5000 Pa and maximum air velocity 15 m/s. In case of high duct pressure, contact Marine for finding the most suitable solution.