Lamellar Valve / Compressor Reed Valve
Reed valves are simple, low cost and efficient devices used in commercial refrigeration systems. Reed valves are like the reeds in a harmonica or a concertina. They consist of a thin strip of metal used a flapper to cover an orifice which controls the flow of inlet and outlet gas in a compressor.
During the intake stroke of a compressor or engine, the pressure inside the cylinder drops below the pressure outside, causing the reeds to flex open and allow the gas or air to flow into the cylinder.
Discharge Valve Function:
During the compression stroke, the pressure inside the cylinder rises, causing the reeds to close against the valve seat and prevent backflow, directing the compressed gas or air to the discharge port.
Design and Structure of a Lamellar Valve
Reeds (Lamellae):
The core components of a lamellar valve are the thin, flexible reeds made of metal (typically stainless steel or spring steel) or composite materials. These reeds act as the movable elements that open and close to control fluid flow.
Valve Seat:
The valve seat is the surface against which the reeds seal when closed. The seat typically has multiple openings or ports that the reeds cover to prevent backflow.
Retainer:
The retainer holds the reeds in place and ensures that they remain aligned and can flex appropriately. It usually consists of a rigid frame that supports the reeds while allowing them to move.
Advantages of Lamellar Valves
Simplicity and Reliability:
Lamellar valves have a simple design with few moving parts, making them highly reliable and less prone to mechanical failure compared to more complex valve designs.
Low Inertia:
The thin, lightweight reeds have low inertia, allowing them to respond quickly to pressure changes, which is particularly advantageous in high-speed applications.
Self-Adjusting:
The flexibility of the reeds allows them to conform to the valve seat, providing a good seal without the need for precise machining tolerances.
Cost-Effective:
Due to their simple design and ease of manufacturing, lamellar valves are generally cost-effective and economical to produce.
In summary, a lamellar valve is a simple, reliable valve type used in various applications, especially where quick response to pressure changes is required. Its design, featuring flexible reeds that open and close based on pressure differentials, offers advantages in terms of simplicity, low inertia, self-adjusting sealing, and cost-effectiveness. Proper maintenance and regular inspection are essential to ensure the longevity and efficient operation of lamellar valves.
