Ring Valve

A ring valve is a type of valve used in reciprocating compressors and some other types of machinery to control the flow of gases or fluids. Ring valves are named for their distinctive design, which typically includes a series of concentric rings that move to open and close the valve. These valves are known for their efficiency, durability, and ability to handle high pressures and temperatures.

Ring Damped Compressor Valves

DescriptionFunctions

DONGYI ring valves with high-performance non-metallic valve rings in a flat or convex form are universal for all gases and applications. The advantage of the ring valves is the rotation of the valve rings which results in very uniform wear and self-cleaning effect. Due to their individual motion rings are especially resistant to liquid hammers.

Similar to plate valves, valves with flat-formed rings can normally be machined on a conventional turning lathe, which means a relatively easy retrofitting.

Furthermore the convex form guarantees favourable aerodynamic characteristics of the medium flow under compression inside the valve. Thus the convex form is generally more efficient due to:

Streamlined design
Higher suitability for contaminated environment

Opening and Closing:

During the compressor’s operation, gas pressure forces the rings away from the valve seat, allowing gas to flow through the valve. When the pressure drops or reverses, the springs push the rings back against the seat, closing the valve and preventing backflow.

Sealing:

The rings provide a robust seal when the valve is closed, ensuring no gas leaks back through the valve. This is crucial for maintaining the efficiency and performance of the compressor.

Flow Control:

Ring valves are designed to provide minimal resistance to flow when open, which helps reduce energy consumption and improve the overall efficiency of the compressor.

Design and Components

Concentric Rings:

The primary feature of a ring valve is the set of concentric rings that serve as the sealing elements. These rings are usually made of high-strength materials such as steel, stainless steel, or composites, and they move axially to open and close the valve.

Valve Seat:

The valve seat is the part of the valve body against which the rings seal. It’s designed to ensure a tight seal when the valve is closed, preventing any backflow of gases.

Spring Mechanism:

Springs are typically used to return the rings to their closed position after they have been displaced by the flow of gas. The spring force helps maintain the rings in a sealed position when the compressor is not actively moving gas.

Cage:

The cage houses the rings and springs, guiding their movement and ensuring they stay aligned. The cage structure also affects the flow characteristics and efficiency of the valve.

Regular inspection and maintenance of ring valves are essential to ensure their optimal performance and longevity. Factors such as the type of gas being compressed, operating conditions, and usage patterns will affect the maintenance schedule.

In summary, ring valves are an efficient and durable type of valve used in reciprocating compressors. Their design features concentric rings and a spring mechanism that provides reliable sealing and flow control, making them suitable for high-pressure and high-temperature applications across various industries.