Solenoid valve selection guide

As an indispensable key component in automatic control system, the selection of solenoid valve has an important impact on the performance and reliability of the system. This paper will introduce the main points of solenoid valve selection, application scenarios and its structure principle, to help readers better understand and apply the solenoid valve technology.

First, solenoid valve selection points

When selecting a solenoid valve, the following key points need to be considered:

1. Working medium: First of all, it is necessary to clarify the working medium used, such as liquid, gas or steam. Different working media have different requirements for the material, sealing performance and corrosion resistance of the solenoid valve, so it is necessary to choose the solenoid valve model suitable for the working medium.

2. Working pressure: Determine the range of working pressure required by the system in order to select the appropriate rated pressure of the solenoid valve. Too high or too low working pressure may cause the performance of the solenoid valve to decline or not work properly.

3. Flow requirements: Select the appropriate solenoid valve diameter and diameter according to the flow requirements of the system. Too large or too small aperture may cause the system flow instability or cannot meet the requirements.

4. Operating temperature: Determine the operating temperature range of the system, and select solenoid valve materials and seals that can withstand the temperature range. Too high or too low operating temperature may affect the performance and life of the solenoid valve.

5. Control mode: Select the appropriate solenoid valve control mode according to the control requirements of the system, such as direct drive type, guide type or diaphragm type. Different control modes apply to different application scenarios.

Second, electromagnetic valve application scenarios

Solenoid valves are widely used in various industrial fields, and the following are some common application scenarios:

1. Automated production line: Solenoid valves can be used to control hydraulic or pneumatic equipment to achieve the operation and control of automated production lines.

2. Automotive industry: Solenoid valves are used in automotive engine control systems, such as fuel injection systems, air conditioning systems and braking systems.

3. Petroleum and chemical industry: Solenoid valves are used to control the flow of liquid or gas in pipelines to achieve flow regulation, pressure control and fluid cut-off functions.

4. Medical equipment: Solenoid valves play an important role in medical equipment, such as ventilators, infusion equipment and blood dialysis machines.

5. Air conditioning and refrigeration: Solenoid valves are widely used in air conditioning and refrigeration systems to control the flow and pressure of refrigerants.

Third, the electromagnetic valve structure principle interpretation

The basic structure of the solenoid valve consists of a coil, a valve body and a spool. Its working principle can be simply described as follows:

1. Working principle: When energized, the coil generates a magnetic field, so that the valve core is subjected to magnetic force, and the valve seat is separated or in contact, thereby controlling the flow of the medium. When the power is off, the magnetic field disappears, the spool returns to its original position due to the action of the spring, and the valve is closed.

2. Structure analysis: The valve body of the solenoid valve is usually made of metal material, which has certain strength and sealing performance. The spool usually consists of a movable part with a sealing ring, and when the spool is in contact with the seat, the sealing medium flows. The coil is connected to the power supply through a wire to generate a magnetic field and control the movement of the valve core.

3. Various types: According to the application requirements, the solenoid valve can be divided into two types: direct-acting and guided. The spool of the direct-acting solenoid valve is directly affected by the magnetic force generated by the coil to realize opening and closing; The guided solenoid valve realizes the flow control of the medium through the structure of the spool and the guided valve plate.

Solenoid valve is an important component in automatic control system, its selection, application scenario and structure principle have an important impact on the performance of the system. In the selection, need to consider the working medium, working pressure, flow requirements, working temperature and control mode and other factors. Today's sharing is here, more switch related information in Shanghai Yongxing Electronic Switch Co., LTD., please continue to pay attention to us.