Gate valve, check valve, filter and globe valve are common types of valves used in piping systems.
1. Gate valve: The gate valve is a valve used to cut off or open pipeline fluid. It has a linear flow regulation characteristic and is typically used in applications where a complete shutoff of flow is required. The gate valve needs to open or close the valve first during operation, so the response speed is slow, but its sealing performance is good, and it is suitable for high-pressure and high-temperature fluid pipelines.
2. Check valve (check valve): The check valve is also known as a reverse valve, which is a valve used to prevent pipe backflow. The check valve only allows one-way flow and can be automatically closed to prevent reverse flow. The check valve is generally suitable for applications that require fluid flow in one direction, such as pumping stations and water treatment systems.
3. Filter: A filter is a device used to remove impurities and solid particles from a fluid. The filter usually uses different levels of filter media to remove impurities and particles of different particle sizes. The filter is suitable for applications that need to protect pipes and valves from particulate matter and impurities, such as water treatment systems and cooling water circulation systems.
4. Globe valve: A globe valve is a valve used to control fluid flow and regulate pressure. It has linear flow regulation characteristics and good sealing performance and is generally suitable for applications requiring control of flow and pressure. Globe valve can control the flow of fluid by rotating the valve, has a fast response speed, and is usually suitable for low-pressure and low-temperature fluid pipelines.
The check valve is a valve used to prevent fluid from flowing backward, also known as a non-return valve, reverse valve or reverse valve. Its main function is to ensure that the fluid can only flow in one direction in the pipeline, and prevent the backflow or reverse flow of the fluid from causing damage or harm to the equipment or system. Check valves are widely used in petrochemical, electric power, water conservancy, pharmaceutical and other fields.
The structure of the check valve is various, and the common ones include a ball check valve, ferrule check valve, butterfly check valve, lift check valve, swing check valve, etc. Their basic components include a valve body, valve cover, valve seat, valve disc, spring and transmission mechanism, etc.
The working principle of the check valve is to use the tightness between the disc and the valve seat to realize the one-way opening and closing of the valve. When the fluid enters the pipeline from the inlet of the valve, the valve disc is opened upward by the pressure of the fluid, and the fluid can flow freely; and when the fluid flows backward from the outlet of the valve, the valve disc will be forced to close by the backflow fluid pressure to prevent the fluid countercurrent. Springs or other recovery devices can strengthen the sealing and stability of the disc to ensure the reliability and safety of the valve.
Information to be updated
English
中文简体
