There are many ways to classify solenoid valves, and the key is to see what the classification basis is. In this paper, solenoid valves are classified according to their functions, and the specific purposes of classified solenoid valves are introduced. If the answer is helpful to you, please give a compliment to Wheaton VTON valve.
The inlet solenoid valve is a mechanism that switches valves through the suction of coils. There are many kinds of solenoid valves, and different solenoid valves play a role in different positions of the control system. Taking Weidun VTON as an example, the gas solenoid valve is used for emergency gas cut-off, the signal feedback solenoid valve is used for signal output feedback, and the high-temperature steam solenoid valve is specially used for high-temperature medium occasions. This paper introduces the specific uses of various solenoid valves in detail.
1, inlet pilot solenoid valve
When the inlet pilot solenoid valve is energized, the electromagnetic force lifts the valve stem and opens the pilot valve port. At this time, the upper cavity of the solenoid valve releases pressure through the pilot hole, forming a pressure difference between the upper and lower parts around the main valve core. Under the action of pressure difference, the fluid pressure pushes the main valve core to move upward, opening the main valve port. When power is cut off, under the action of spring force and gravity of the main spool, the valve stem resets, the pressure in the upper cavity of the solenoid valve increases, the fluid pressure pushes the main spool down, and the main valve port closes. Used in the case of pressure difference before and after the valve and in large-diameter pipeline system. For example, the pilot solenoid valve of Weidun VTON is used in pressure occasions where the pressure difference is greater than 0. 1Mpa.
2. Imported direct-acting solenoid valve
Imported direct-acting solenoid valve, when energized, the electromagnetic coil generates electromagnetic force to lift the closing piece from the valve seat and open the valve; When the power is cut off, the electromagnetic force disappears, the spring presses the closing piece on the valve seat, and the valve closes.
For example, Weidun VTON's direct-acting solenoid valve is used for vacuum negative pressure, zero pressure difference or self-flowing medium, or small-diameter pipeline.
3. Imported explosion-proof solenoid valve
The imported explosion-proof solenoid valve encapsulates all the equipment parts that may ignite the explosive gas mixture in a shell. The shell can withstand the internal explosion of combustible mixture penetrating into the shell through any joint surface or structural gap of the shell without damage, and will not cause the ignition of the explosion environment formed by one or more external gases or vapors. All parts that may generate sparks, arcs and dangerous temperatures are placed in the flameproof enclosure, which makes the internal space of the equipment. There is a gap in the flameproof shell, and there may be explosive gas mixture inside due to the breathing and gas penetration of electrical equipment.
For example, the imported explosion-proof solenoid valve of Weidun VTON is a series of special solenoid valve products for conveying flammable and explosive media or for explosive dangerous places. Electromagnetic valves with different explosion-proof grades should be selected for different environments and fluids.
4. Imported high-pressure solenoid valve
Imported high-pressure solenoid valves and high-pressure flange solenoid valves refer to solenoid valves with forged valve bodies and flange connections. The pressure is above 5.0Mpa, up to 160Mpa, and they are used in various high-pressure systems. For example, Weidun VTON imported high-pressure solenoid valves are widely used in automatic control of experimental equipment, test equipment, CNG equipment, gas equipment, hydraulic system, mining machinery, compressors, air separation equipment, high-pressure pumping stations, cleaning equipment and machine manufacturing.
5. Imported high-temperature solenoid valve
Imported high-temperature solenoid valve refers to the solenoid valve with high-temperature resistant material, high-temperature resistant coil, precision casting and beautiful appearance, which is suitable for automatic control of pipelines such as medium and high-temperature hot water, heat transfer oil, high-temperature steam, saturated steam and superheated steam, with the highest temperature resistance of 550 degrees; For example, Weidun VTON imported high-temperature solenoid valves are widely used in medical equipment, clothing equipment, petrochemical industry, biopharmaceuticals, HVAC, electroplating and painting, drying equipment, rubber and plastic machinery, food and beverage, papermaking, printing and dyeing, power mines and other industries.
6. Imported steam solenoid valve
Imported steam solenoid valve, flange steam solenoid valve, refers to the solenoid valve used to cut off steam medium, which has the characteristics of high temperature resistance and corrosion resistance. For example, Weidun VTON imported steam solenoid valve is suitable for two-position automatic and remote on-off switching of steam pipes of heaters, radiators, dryers, fabric setting machines, steam dyeing machines, tobacco vacuum moisture regain machines, fruit and vegetable dryers and other complete sets of equipment with steam as heating medium, and is widely used in management devices of petroleum, chemical industry, metallurgy, textile, food, medical care, environmental protection and other industrial departments to realize automation of temperature control, energy saving and program control.
The temperature and pressure of saturated steam are relatively stable, the temperature is lower than 250℃ and the working pressure is lower than 6.4Mpa.
The change base of superheated steam temperature and pressure is large, with the highest temperature above 400℃ and working pressure below 4.0Mpa.
7. Inlet water solenoid valve
Imported water solenoid valve, water solenoid valve, suitable for water or liquid as working medium, can automatically control or remotely control the on-off of water, oil, liquid and other working medium pipelines. Because the valve adopts rubber seal, the cleanliness of working medium is greatly reduced, and it has the characteristics of fast opening and closing speed and high reliability. For example, Weidun VTON imported high-pressure solenoid valve is suitable for using water or liquid as working fluid, and can automatically control or remotely control the on-off of water, oil, liquid and other working fluid pipelines.
8. Imported gas solenoid valve
Imported gas solenoid valve, gas solenoid valve, the main uses are as follows: connected with combustible gas leakage monitor. When the instrument detects the leakage of combustible gas, it will automatically and quickly close the main gas supply valve and cut off the gas supply, so as to stop the occurrence of malignant accidents in time. For example, the imported gas solenoid valve of Weidun VTON is used to cut off the gas.
9. Imported oil solenoid valve
Imported oil solenoid valve refers to the solenoid valve used to control the opening and closing of oil media such as oil, petroleum, crude oil, diesel oil, hydraulic oil, heat transfer oil and lubricating oil. Generally made of brass or stainless steel, it is explosion-proof, high-pressure, high-temperature and corrosion-resistant. For example, Weidun VTON imported oil solenoid valve was cut off due to lubricating oil, hydraulic oil, heat transfer oil and kerosene.
10, intake solenoid valve
The imported gas solenoid valve refers to the solenoid valve used to control the switch of nitrogen, oxygen, hydrogen, helium, argon, carbon dioxide, methane, acetylene and other gases. Generally, explosion protection is needed.
For example, the imported gas solenoid valve of Weidun VTON is used in various occasions such as normal temperature, high temperature, negative pressure, low pressure and high pressure, and the applicable fluids are gas pipelines such as steam, hot water, air and nitrogen; Widely used in medical equipment, rubber and plastic machinery, clothing equipment, drying equipment, pharmacy, refrigeration, heating and ventilation, electroplating and painting, food and beverage, waterworks, environmental protection water treatment and vacuum equipment.
1 1, imported solenoid valve with signal feedback
The solenoid valve with signal feedback refers to the solenoid valve that can feed back the opening and closing of the solenoid valve through the current signal. When the coil is energized, the moving iron core is attracted, so that the main valve plug moves upward due to the pressure difference, opening the main valve port and driving the moving magnet to leave the sensor; The sensor outputs a 5~24V DC signal to the control center. or vice versa, Dallas to the auditorium
12, imported gas emergency cut-off solenoid valve
Imported gas emergency cut-off solenoid valve? , refers to the solenoid valve used in LPG, gas, gas, gas or natural gas pipeline system. The solenoid valve is usually open. In an emergency, it can quickly close and cut off the gas and other media to avoid accidents.
Application scope: gas automatic control, gas automatic control, gas automatic control, liquefied petroleum gas automatic control, methane automatic control, gas equipment, acetaldehyde equipment, gas alarm and gas equipment, etc.