Kolster

• The LDS damper is a multi-blade revolving damper for rectangular ducts.
• It is primarily used for regulation purposes, but can be used for sealing off as well.
• The LDS damper is designed for flange mounting or for welding in duct sections. The solid and powerful construction ensures reliable operation and long service life, plus the option dismantling in case of maintenance or inspection.
• The damper blades are made from solid sheets or as “wing profile” with smooth outer surfaces, which gives minimal flow resistance and high strength. The individual damper blades are interconnected with ball joints and a rod system.
• The LDS damper can be made with an air barrier*, so that a 100% tightness can be achieved.
• The damper blades are counter rotating with the completely smooth surfaces giving an evenly distributed flow in the duct cross-section with minimum turbulence.
• The valve can also be made with parallel-rotating damper blades.
• The damper blade shafts are suspended in heat resistant spherical special bearings and are fitted with separate shaft seals where the frame is penetrated.
• The LDSR damper can be supplied with different types of seals between the damper blades and frame.
• Material: regular steel, Corten steel, heat resistant as well as stainless and acid-resistant steel.
• Operation: Can be delivered with either manual operation, pneumatic or electric drive, box with limit switches or positions with a 4-20 mA feedback signal for regulation purposes.

*The air barrier fan is not included.