Field application of Electric double seated control valve

Field application of Electric double seated control valve

Electric double seated control valve adopts a double guide structure, which has the characteristics of compact structure, light weight, sensitive action, large valve capacity, accurate flow characteristics, convenient disassembly and assembly, etc. The electric two seat regulating valve is composed of a two seat valve body and a straight stroke electric actuator independently developed by our company. The electric actuator equipped with the electric two seat regulating valve contains a feeding amplifier, which receives the unified standard signal of 4-20mA or 1-5V · DC, converts the current signal into the corresponding linear displacement, and automatically controls the opening of the regulating valve to continuously adjust the process parameters such as pressure, flow, temperature and liquid level of the fluid in the pipeline. Electric two seat regulating valve is widely used to accurately control gas, liquid, steam and other media, especially in occasions with large pressure difference and less strict requirements on leakage.

With the progress of science and technology, in the fields of machinery manufacturing, electric power, construction, transportation, information technology and so on, machinery and equipment or production processes have been able to achieve information processing and process control such as measurement and manipulation according to the expected goals without direct manual intervention. Industrial automation has been gradually realized, and the corresponding industrial automation technology has also become the main means to improve labor productivity. Among them, the regulating valve used to control fluid flow is an important part of the industrial automation system. It is indispensable in the regulating system, which is called the "hands and feet" of production process automation.

Stable production

As a terminal control unit in industrial process control, the stability of Electric double seated control valve is particularly important to the whole control system. If the electric two seat regulating valve can not stably realize the command issued by the control room, it may cause the fluctuation of system pressure, temperature or liquid level, which will seriously affect the normal production. In order to stabilize the normal production, properly select the elastic coefficient, the mass of moving parts, the pressure difference before and after the valve, the shape of the valve core, the damping coefficient and the viscous friction coefficient, so as to make its stability range large to the working range, which has certain guiding significance for its stable production. With the high load operation of some chemical plant units and the implementation of 30% capacity increase, the electric two seat regulating valve is constantly suffering from corrosion, scouring, wear, vibration, internal leakage and other problems, which forces the service date of the electric two seat regulating valve to be greatly shortened and the working reliability to be reduced, resulting in a significant decline in the production efficiency of the process system and device, and even a complete shutdown of production in serious cases.

Optimize control.

As a terminal element in the industrial automation control system, it is essential in the regulation system. The electric double seated control valve is specially used to control the fluid pressure, flow, temperature and liquid level. In use, the type of regulating valve shall be reasonably selected according to the requirements of the process. Pay attention to optimizing the flow characteristics of the electric two seat regulating valve, which should be well matched with the control system, so as to give full play to the control function of the system and generally reduce the throttling energy consumption.