Pneumatic regulating stainless steel butterfly valve

Pneumatic regulating stainless steel butterfly valve

Industrial process control continues to network, distribution of intelligent development, adapted to the requirements of the digitalization of equipment management, regulating valve is an important executive component of the process control system, control regulating valve operation of the distribution of intelligent solutions came into being. Intelligent valve positioner has the functions of data processing, state identification, fault diagnosis, online and offline testing, two-way communication and so on. The process control system controls the regulating valves through the field bus, which enables the manager to realize the predictive maintenance and scientific management of the regulating valves. The development of computer technology, electronic technology, communication technology, intelligent predictive diagnostic technology, the requirements of intelligent valve positioner must adapt to the network communication and power supply common line, its core part of the pneumatic control components must realize ultra-low energy consumption operation, to ensure that the network bus control system operation is safe and reliable.

Traditional pneumatic valves use a large number of electromagnetic principles for electrical energy-mechanical energy conversion. The coil and solenoid electromagnetic force effect controls the electrical signal conversion to mechanical action to operate the valve spool, enabling gas path or gas pressure switching and flow control. However, solenoids and coils have drawbacks such as power loss, slow response speed, heat generation, mechanical wear, and electromagnetic interference. Modifying solenoid materials and valve processing to address these issues leads to increased costs and complexity without solving the root problem. There is an urgent need for low power consumption, intelligent integration, high precision, fast response, and long life in pneumatic control.

Intelligent valve positioner: 具有智能功能的阀门定位器

Intelligent valve positioner

Intelligent Valve Positioner is an intelligent process control instrument based on microprocessor technology and adopts digital technology for data processing, decision generation, and two-way communication. Intelligent valve positioner can be divided into separate power supply and no separate power supply according to the power supply; explosion-proof and non-explosion-proof can be divided according to the explosion-proof level.

Traditional valve positioner problems

The use of nozzle baffle technology, that is, the mechanical force balance principle of operation, more movable parts, vulnerable to temperature, vibration;

Due to differences in packing friction caused by regulating valve specifications, it is difficult to achieve the optimal control state with the hardware combination of the regulating valve.

The signal flow is unidirectional to the control instrument into the positioner, and in case of a failure, it cannot self-diagnose the fault location or cause.

The nozzle holes are easily blocked by dust in the air supply, so that the positioner can not work properly.

The nozzle needs to be continuously supplied with compressed air, which consumes more energy.

2.6旅行和零点调整，需要反复调整，调节麻烦;

2.7 Single function, poor expandability.

Third, the advantages of intelligent valve positioner: 1. Improve control accuracy and stability. 2. Enhance operational efficiency and reduce maintenance costs. 3. Enable remote monitoring and control capabilities. 4. Provide diagnostic information for predictive maintenance. 5. Support integration with smart systems for enhanced automation.

High positioning accuracy and reliability. Less mechanical moving parts, the input signal and the valve position feedback signal direct digital comparison, not easily affected by the environment, good stability, there is no mechanical error caused by the impact of the dead zone, has a higher positioning accuracy and reliability.

Convenient modification of flow characteristics. Intelligent valve positioning includes linear, equal percentage, fast open characteristic function module, which can be set through the button or the upper computer, handheld setter for data setting.

Zero point and range adjustment is simple. Zero point adjustment and range adjustment do not interfere with each other, the adjustment process is simple and fast.

3.4 Diagnostic and detection functions. In addition to the general diagnostic function, it can output the feedback signal corresponding to the actual action of the regulating valve, which can be used to monitor the working status of the regulating valve from a distance. Intelligent valve positioner receiving digital signals, with two-way communication capabilities, can be used locally or remotely using the host computer or handheld operator for valve positioner configuration, debugging and diagnosis.

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