Intelligent high pressure electric regulating valve

The intelligent high-pressure electric control valve is an automated device designed for high-pressure fluid control systems. It combines intelligent control technology and high-pressure valve technology, offering high precision, high reliability, and intelligent features. Here is a detailed introduction:

• Structure: The valve typically consists of a high-pressure valve body, an electric actuator, and an intelligent controller. The valve body is made of high-pressure-resistant materials such as stainless steel. The electric actuator includes a stepper motor and a reduction gear mechanism, which drive the valve core to move. The intelligent controller, centered around a microcontroller such as the STC12C5A60S2, also includes a decoding circuit, a driving circuit, and an encoder. It receives and processes signals to control the valve's opening.

• Operating principle: The intelligent high-pressure electric regulating valve receives 4-20mA current signals or other control signals from the PLC or DCS system. The intelligent controller calculates the required adjustment amount based on the deviation between this signal and the current valve opening using the PID algorithm. It then drives the stepper motor to rotate, which, through a reduction mechanism, moves the valve core, changing the valve's opening. This precisely controls fluid parameters such as flow rate and pressure. Simultaneously, an encoder provides real-time feedback on the valve's opening, allowing the controller to monitor and adjust in real-time.

• Key Features: Valve flexible switch function, preventing valve jamming and damage during closing or fully opening.- Valve position limit judgment method without mechanical limit switches, determining the limit position by detecting position signal increments, ensuring high reliability.- Motor protection function, monitoring motor temperature through temperature sensors to prevent motor overheating and burnout.- Precise positioning of the valve based on the current position, the given position, and the change rate during deceleration, reducing overtravel.

• Technical parameters: The nominal pressure can generally reach PN1.6-PN10.0MPa, the nominal diameter is DN20-DN300mm, the input signal is 4-20mA DC, 0-10mA DC, etc., the power supply voltage is 220V AC 50Hz, the inherent flow characteristic is straight line or equal percentage, and the inherent adjustable ratio is 50:1.

• Application areas: Widely used in automatic control systems for large-scale thermal power plants, chemical plants, water and wastewater treatment, natural gas fields, steel plants, etc., for controlling parameters such as flow rate, pressure, and temperature of high-pressure fluids.