Applications and Advantages of a Louver Damper System
In the HVAC (Heating, Ventilation, and Air Conditioning) industry, the louver damper is utilized to maximize or to constrict the flow of air while keeping debris from entering the duct work. Louvers are angled slats, and work similar to window blinds when louvers and dampers are combined. They can be adjusted manually, pneumatically, or electronically via a damper actuator.
A louver damper is commonly made of sheet metal, although other materials may be used. Consulting a manufacturer that specializes in precise sheet metal fabrication would be essential for successful operation.
Louvers and dampers are combined to allow air to circulate without allowing water into the system. This combination consists of several blades which minimize backdraft. The blades cover a duct and are mounted horizontal to each other. One of the advantages of using louvers and dampers is protection of the air conditioning and heat unit during periods of extreme weather.
Another advantage of the louver damper is the simple design and low power requirements to run the damper actuator. Also the louvers and dampers design requires only a small amount of installation room outside of the duct. This is known as requiring minimum clearance.
These dampers can be utilized to regulate and modulate air flow, as well as to completely seal an HVAC duct work system. They have multiple applications and they can be fabricated to meet specific needs. There are combination and adjustable louver damper systems also available.
A louver damper that one would need to protect an air conditioning and heating unit in cases of inclement weather is referred to as a penthouse louver and can be applied to an entire roof if required.
The three basic types of louver and damper combinations are the parallel louver system, the opposed louver system, and the double louver system.
The parallel louver system is primarily used where isolation is the main requirement. Opposed louvers are typically utilized to regulate the flow of gases through a duct work system. The double louver system's blades oppose and press against each other to create an air tight seal, and allow for the least amount of leakage of all the dampers. For perspective, a single louver damper seals with about a 92 to 94 percent efficiency, while the double louver damper can provide an air seal with up to 100 percent efficiency. This is a crucial element in controlling air flow to enhance the safety of workers in an industrial setting.
The blade positioning within the damper allows the louver to provide quality air control. Airfoil blades and monocoque blades are two types found in a louver damper. The airfoil blade is used for moderate air cleaning needs and the monocoque blade is ideal for controlling air flow in high air pressure systems. For specialized requirements, custom fabrication is possible.
Depending on the type of louver damper, many functions are possible including preventing debris from entering an HVAC system. A louver damper is a versatile damper that has a variety of applications when air regulation is important while other external factors have to be controlled.