This control valve is a pneumatic diaphragm single-seat control valve, widely used in industrial automation control systems. Here is a detailed introduction:

• Structural features: It adopts top-guided structure, with a compact valve body. The fluid passage is in S-shaped streamline, featuring low pressure drop loss, large flow capacity, wide adjustable range and high flow characteristic accuracy. The guiding area of the valve core guiding part is large, and it has strong anti-vibration performance. Technical parameters: Nominal diameter is DN20-DN400, nominal pressure includes PN0.6, PN1.6, PN4.0, PN6.4, etc. Flow characteristics are linear, equal percentage, and quick opening. Medium temperature can reach -100℃ to +450℃ depending on the form of the valve cover.
• Actuator: It is equipped with a multi-spring diaphragm actuator, featuring a compact structure and high output force. The actuation modes include direct-acting (air-to-close – normally open type) and reverse-acting (air-to-open – normally closed type). Connection methods: Mainly flange connection, and thread connection or welding connection can also be provided according to user requirements.
• Scope of application: It is suitable for working conditions where small leakage is allowed and the pressure difference before and after the valve is not large. It is widely used in industries such as chemical engineering, petroleum, metallurgy, power stations, light textile, papermaking and pharmaceuticals.