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[Chemical Knowledge]：Working Principle and Application of Valve Limit Switch

Read： 342 Time：20months ago Source：Transform the World with Simplicity

The function and basic principle
of the 1. valve limit switch
The valve limit switch is an automatic device that controls the opening and closing state of the valve. It is mainly used to detect the position information of the valve opening and closing and feed it back to the control system, so as to realize the automatic control of the valve opening and closing state. The basic principle is to use the switch sensor and other devices to detect the valve position information, and feedback the detection results to the control system through the signal output interface, and the control system performs calculation and processing to finally control the opening and closing state of the valve.

2. the working process of the valve limit switch

1. Monitoring the valve position

The valve limit switch will be installed on the opening and closing parts of the valve and monitor the valve position information. Generally, the switch sensor is the main detection method. The switch sensor reflects the opening and closing state of the valve by outputting high or low level.

2. Feedback the position information to the control system

When the switch sensor detects a change in the valve position, it will generate a corresponding switch signal. The valve limit switch converts the switch signal into the corresponding analog signal, and transmits the signal to the control system through the signal output interface.

3. control system to position information processing

control system is generally controlled by a computer or PLC. After receiving the valve position information, the system will judge according to the preset conditions, and control the opening and closing state of the valve according to the judgment result.

3. valve limit switch application

valve limit switch is widely used in all kinds of liquid pipeline, gas pipeline and industrial production process need to control the medium flow and pressure of the occasion. The valve limit switch can realize the automatic control of the valve, thereby reducing operation and maintenance costs, improving production efficiency, reducing human error, and improving production safety.

4. valve limit switch operation precautions

1. Valve limit switch should be checked regularly, and cleaned and maintained.

2. Ensure the exact position of the limit switch during installation and prevent it from loosening.

3. In use, it should be ensured that the connection between the limit switch and the pipeline and the valve is firm and tight.

4. Failures during use should be handled in time to avoid affecting the normal operation of the equipment.

5. summary

valve limit switch as an important automatic control device, widely used in industrial production. This article introduces the working principle of the valve limit switch and its application, hoping to be helpful to the readers. In practical application, it is necessary to pay attention to the operation points of the valve limit switch to ensure the long-term stable operation of the device and provide strong support for production.