What are the sealing structures of pneumatic butterfly valves

What are the sealing structures of pneumatic butterfly valves

What are the sealing structures of pneumatic butterfly valves? Common types.

The common types of sealing structures for pneumatic butterfly valves include the following:

1. Elastic sealing: Using elastic materials such as rubber and polytetrafluoroethylene as sealing elements, achieving sealing through their own elasticity. This sealing structure has good sealing performance and elasticity, and is suitable for low-pressure, low-temperature, and small to medium-sized valves.

2. Metal sealing: Using metal materials such as stainless steel and copper alloy as sealing elements, sealing is achieved through the contact between metals. This sealing structure has high pressure resistance and corrosion resistance, and is suitable for high-pressure, high-temperature, and large-diameter valves.

3. Multi layer metal seal: A sealing structure composed of multiple layers of metal sheets stacked together, which is sealed by the compression between the metal sheets. This sealing structure has high sealing performance and pressure resistance, and is suitable for valves under high temperature, high pressure, and severe working conditions.

4. Packing sealing: Install packing materials such as flexible graphite, polytetrafluoroethylene, etc. between the valve stem and valve body, and achieve sealing by compressing the packing materials. This sealing structure has good sealing performance and corrosion resistance, and is suitable for valves with high temperature, high pressure, and corrosive media.

The above are common types of sealing structures for pneumatic butterfly valves. It is very important to choose the appropriate sealing structure according to actual needs and working conditions.

The elastic sealing of pneumatic butterfly valves is achieved by using elastic materials such as rubber and polytetrafluoroethylene as sealing elements. The specific process of implementing sealing is as follows:

1. Seat sealing: The seat of pneumatic butterfly valves is usually made of metal material, and an elastic sealing ring is embedded on the seat, usually made of rubber or polytetrafluoroethylene. When the butterfly plate is closed, the sealing ring on the valve seat will be compressed by the butterfly plate to achieve sealing. The elasticity of the sealing ring enables it to adapt to different working conditions and media, ensuring sealing performance.

2. Butterfly plate sealing: The edge of the butterfly plate is usually embedded with an elastic sealing ring, also made of rubber or polytetrafluoroethylene. When the butterfly plate is closed, the sealing ring on the edge of the butterfly plate will come into contact with the valve body, forming a seal. The elasticity of the sealing ring enables it to adapt to the rotational motion of the butterfly plate and maintain good sealing performance.

3. Compression device: In order to ensure the effectiveness of elastic sealing, pneumatic butterfly valves are usually equipped with compression devices such as bolts or glands. These devices can control the tightness of the sealing ring by adjusting the fastening force to ensure the reliability of the seal.

In general, the elastic sealing of pneumatic butterfly valves is achieved through the use of sealing elements made of elastic materials and the clamping force between the butterfly plate and the valve seat. This sealing structure has good sealing performance and adaptability, suitable for low-pressure, low-temperature, and small to medium-sized valve applications.

Jiernas (Jiangsu) Valve Co., Ltd. After sales service:

1. The warranty period for valve products is 12 months from the date of manufacture, and the "three guarantees" service (return, replacement, and repair) is implemented.

2. Our factory regularly organizes technical and maintenance personnel to visit the product during use, to verify user feedback on product quality, usage status, improvement suggestions, and other aspects, in order to further improve product quality.

3. Respond quickly to customer complaints about quality issues, and have after-sales service personnel arrive at the scene within 24-48 hours (72 hours in other provinces).

4. For after-sales service, users are required to fill out the quality feedback information form after the service, and provide solutions and suggestions to improve the service quality of Jiernas valves.