About Dual Plate Check Valve Sealing Rings
Dual plate check valve sealing rings are located between the valve disc and the valve body, and serve to seal the contact surface between the valve disc and the valve body to prevent fluid leakage. Seal rings are usually made of elastic materials such as rubber or polymer. These materials provide good sealing properties and resist media erosion and leakage.
Functions of Dual Plate Check Valve Sealing Rings
■ Sealing: The main function of the sealing ring is to provide sealing between the two halves of the valve to ensure that the medium is prevented from leaking when the valve is closed and to maintain the sealing integrity of the system.
■ Prevent reverse flow: Dual plate check valve sealing rings help the check valve achieve its core function, which is to allow one-way flow of media while preventing reverse flow and protecting the system from backflow damage.
■ Adapt to pressure changes: During valve operation, the sealing ring can adapt to shape changes caused by pressure changes, maintain a continuous sealing effect, and maintain good sealing performance even under pressure fluctuations.
■ Reduce water hammer: Water hammer is a pressure shock wave generated by fluid in a pipeline due to rapid valve closing. The sealing ring can provide a certain buffering and shock-absorbing effect during the valve disc closing process, reduce the occurrence of water hammer, and protect the safety of pipelines and equipment.
■ Provide reliability of sealing performance: The design and material selection of Dual plate check valve sealing rings need to take into account the requirements of the working environment, such as the temperature, pressure and corrosiveness of the medium. They provide reliable sealing performance and ensure a stable sealing effect during the long operation of the valve.
■ Reduce maintenance needs: Dual plate check valve sealing rings are wear-resistant and corrosion-resistant, and can be used for a long time under harsh working conditions without frequent replacement. This reduces the frequency of maintenance and seal ring replacement, lowering operating costs.
Construction and Materials of Dual Plate Check Valve Sealing Rings
Structure
Double-plate design: Seals are often used in double-plate check valves, which have two main moving parts, the two plates, that move when the valve opens and closes.
Sealing interface: Dual plate check valve sealing rings are located on the contact surface of the two plates. When the valve is closed, the sealing rings are under pressure and deform, filling any tiny gaps to form an effective sealing interface.
Adaptability: The structural design of the sealing ring enables it to adapt to the opening and closing movement of the valve and maintain long-term sealing performance.
material selection
Rubber sealing ring: Common rubber materials include Nitrile Rubber, Chloroprene Rubber, Natural Rubber, Ethylene Propylene Rubber, etc. Rubber sealing rings have good elasticity and corrosion resistance and are suitable for general industrial applications.
Polymer sealing ring: Polymer materials such as polytetrafluoroethylene (PTFE) are also commonly used to make sealing rings. PTFE has excellent corrosion resistance and high temperature resistance and is suitable for applications requiring higher corrosion resistance and temperature resistance.
Other materials: According to special application requirements, other materials can also be used to make sealing rings, such as metal sealing rings, polyurethane sealing rings, etc. The metal sealing ring has high pressure resistance and high temperature resistance, and is suitable for high pressure and high temperature working environments.
The material selection of Dual plate check valve sealing rings needs to take into account the requirements of the working environment, such as the temperature, pressure, corrosiveness and compression recovery performance of the medium. Manufacturers will often provide sealing ring options that comply with relevant standards and specifications based on specific application needs, and provide appropriate material recommendations.
Application Areas
Dual Plate Check Valve Sealing Rings are widely used in various industries and fields, including but not limited to the following aspects:
1. Industrial pipeline system: Double-plate check valve sealing ring is suitable for various industrial pipeline systems, including chemical industry, petroleum, gas, water treatment, electric power and other fields. They are used to control the unidirectional flow of liquid or gas in pipes and prevent backflow and leakage.
2. Sewage treatment and water supply systems: In sewage treatment plants and water supply systems, Dual plate check valve sealing rings play a role in preventing sewage backflow and maintaining water supply. They ensure that sewage flows in the intended direction during treatment and prevent contamination of water sources in the water supply system.
3. Oil and natural gas industry: In the oil and natural gas industry, double-plate check valve sealing rings are used in control systems for pipeline transportation, storage tanks, and equipment. They prevent backflow of media, ensure smooth flow of fluids in pipes, and protect equipment from pressure surges and backflow.
4. Chemical process: In chemical process, Dual plate check valve sealing rings are used to control the flow direction of chemical media and prevent backflow. They play an important safety control role in various chemical processes, protecting equipment and systems from possible accidents and leaks.
5. Power plant: In the water supply, steam and cooling water system of the power plant, the double-plate check valve sealing ring is used to ensure that the fluid flows in the correct direction and prevent backflow and water hammer. They provide stable fluid control and protect the safe operation of power generation equipment.
In general, Dual plate check valve sealing rings are widely used in pipeline systems in various fields and industries to control the flow direction of fluids, prevent backflow and leakage, and ensure the normal operation of the system and the safety of the equipment.
*Special reminder, because there are different types of valves, when selecting seals, if you can provide the corresponding drawing dimensions or sample pictures, we can recommend suitable seals for you.
