Working principle of electromagnetic regulating valve

Electromagnetic control valves are used to adjust process parameters such as medium flow, pressure, temperature, and liquid level in the field of industrial automation process control. According to the control signal in the automation system, the opening of the valve is automatically adjusted, so as to realize the adjustment of medium flow, pressure, temperature and liquid level. Electromagnetic regulating valve is usually composed of electric actuator or pneumatic actuator and valve body. There are mainly two types of straight-through single-seat type and straight-through double-seat type. The latter has the characteristics of large flow capacity, small unbalance and stable operation, so it is usually especially suitable for occasions with large flow, high pressure drop and less leakage. The angular stroke mainly includes: V-type electric regulating ball valve, electric butterfly valve, ventilation regulating valve, eccentric butterfly valve, etc. The flow capacity Cv value is the main parameter for electromagnetic control valve selection. The flow capacity of the control valve is defined as: when the control valve is fully open, the pressure difference between the two ends of the valve is 0.1MPa, and the fluid density is 1g/cm3, the flow rate per hour The flow rate of the diameter regulating valve is called the flow capacity, also known as the flow coefficient, expressed in Cv, and the unit is t/h. The Cv value of the liquid is calculated according to the following formula. According to the flow capacity Cv value look-up table, the nominal diameter DN of the regulating valve can be determined. Electromagnetic control valves play a very important role in the automatic control of modern factories whose production depends on the correct distribution and control of flowing liquids and gases. Whether these controls are energy exchange, pressure reduction or simple container filling, they all need some final control elements to complete. The final control element can be considered as automatically controlled“physical strength”. Between the low energy level of the regulator and the high energy level functions required to perform flow control, the final control element performs the necessary power amplification.