A control valve, also known as a regulating valve, is a crucial component in industrial automation process control. It receives output signals from the adjustment control unit and utilizes power operation to modify the final control element, influencing process parameters such as medium flow, pressure, temperature, and liquid level. Typically, a control valve consists of actuators and valves.
Based on travel characteristics, control valves can be categorized into linear control valves and angle control valves. According to different operations, they can be classified as pneumatic control valves, electric control valves, and hydraulic control valves. In terms of function and characteristics, control valves are further divided into three types: linear characteristic, equal percentage characteristic, and parabolic characteristic.
A control valve comprises actuator and valve body components, where the actuator serves as the driving device. It generates thrust based on the signal pressure, causing the push rod to undergo corresponding displacement and, in turn, driving the spool of the control valve into action.
As a leading manufacturer and supplier of control valves in China, Weldon Control Valve stands out for its simple structure, reliable and stable action, substantial output force, easy installation and maintenance, cost-effectiveness, and fire-proof properties. These control valves are suitable for a wide range of applications, including air, water, steam, various corrosive media, slurry, oil, and more. Control valves play a vital role in the automatic control of modern factories, making them the most widely used type of final control element.