Application and Structural Characteristics of Resilient Metal Hard Seal Butterfly Valve
Resilient metal hard seal butterfly valves, also known as zero leakage butterfly valves, are a new generation of butterfly valves with a high level of seal performance. Due to their low manufacturing costs and simple installation, they are widely used in oil and gas transportation pipelines, oil and gas refining and chemical production pipelines, and water supply and wastewater pipelines or plant desalination systems.
The resilient metal hard seal butterfly valve mainly consists of a valve body, a valve stem and a valve disc. The valve body is usually made of cast iron or ductile iron, and the valve stem and disc are usually made of carbon steel or high-temperature alloy. The resilient metal hard seal butterfly valve mainly uses a multiple seal design, which combines the elastic seal of an elastomer O-ring and the hard seal of a metal ring.
The elastomer O-ring seal is under a certain squeezing force, which can increase the sealing ability and reduce the leakage. It is mainly used to separate the relative movement of the valve stem and the valve plate, so that the rotation of the valve stem can drive the movement of the valve plate to achieve the opening and closing of the valve. On the other hand, the metal hard seal ring is mainly used to prevent the medium from leaking through the movement clearance between the valve stem and the valve seat. The gap between the two can be adjusted, and when the valve is closed, a certain adjustment force is generated, which ensures that the two seals are closely combined.
The resilient metal hard seal butterfly valve has many advantages. Firstly, its sealing performance is excellent, with a leakage rate of zero. Secondly, it is suitable for both on-off and adjustable valves. Thirdly, it is simple in structure and easy to install. Fourthly, it can realize intranet and overhaul without dismantling the pipeline. Fifthly, it reduces the maintenance cost. Sixthly, its versatile and economical, allowing it to be used in various industrial and laboratory fields.
In addition, the resilient metal hard seal butterfly valve has a short opening and closing time, which can responsively throttled. It also has a high flow capacity, and its Cv value is several times higher than that of a gate valve. Whats more, the diameter of the resilient metal hard seal butterfly valve is significantly smaller than the diameter of a gate or a globe valve, which saves metal usage. Moreover, it can effectively reduce energy loss.
In summary, the resilient metal hard seal butterfly valve has the advantages of excellent sealing performance, wide range of applications, high flow capacity and energy saving. It is also cost-effective and flexible to use, making it a popular choice for various industries.
