What is seat ring in control valve?

A seat ring in a control valve is a critical component that forms a seal with the valve's plug or disc when the valve is closed, preventing flow through the valve. It is typically made from materials that can withstand the specific pressure, temperature, and fluid conditions of the application. The design and condition of the seat ring significantly affect the valve's performance, including its flow characteristics and leakage rates. Proper maintenance of the seat ring is essential for ensuring the reliability and efficiency of the control valve.