Pneumatic control valve ZJHM

Regulating valve, also known as control valve, is the final control element in the field of industrial automation process control. It receives control signals output by the regulating control unit and uses power operation to change process parameters such as medium flow rate, pressure, temperature, and liquid level. It generally consists of an actuator and a valve. If according to the characteristics of the stroke, the regulating valve can be divided into straight stroke and angular stroke; According to the power used by the actuator, it can be divided into three types: pneumatic control valve, electric control valve, and hydraulic control valve; According to its functions and characteristics, it can be divided into three types: linear characteristics, equal percentage characteristics, and parabolic characteristics. The regulating valve is suitable for air, water, steam, various corrosive media, mud, oil and other media.

Working principle and precautions of regulating valves

Any type of regulating valve actuator is a device that utilizes energy to drive the valve. This device may be a manually operated gear set used to open and close valves, or an intelligent electronic component with complex control and measurement devices that can achieve continuous valve adjustment. With the development of microelectronics technology, actuators have become more complex.

Selection, maintenance, and calibration of regulating valves

The regulating valve is the most common actuator in the automatic control system of power plant. Generally, the automatic control system consists of objects, monitoring instruments, controllers, actuators, etc. The correct selection of the structural type, flow characteristics, flow capacity, and output torque, thrust, and stroke of the regulating valve plays a very important role in the safety, stability, economy, and reliability of the automatic control system.

Installation details and skills of pneumatic control valves

Pneumatic control valves are usually a combination formed by connecting the pneumatic actuator and the control valve after installation and debugging. The installation and debugging of pneumatic control valves are extremely important. This article mainly introduces the installation details and skills of pneumatic control valves: A. During the installation process, always follow the installation guidance and precautions of pneumatic control valves; B. The working environment temperature of the regulating valve should be within (-30~+60). The relative humidity should not exceed 95% or 95%, and the relative humidity should not exceed 95%