What is the use of a Pneumatic Solenoid Valve?
A pneumatic Solenoid Valve is a basic device that automatically opens and closes based on electromagnetic force. Its main function is to control the automation of objects, and it belongs to the actuating component. In industrial control systems, it is used to regulate the direction, flow rate, speed, and other parameters of the medium, and is widely applied in various fields of production.
Because there is a coil in the solenoid valve, when current passes through, an electrical and magnetic conversion occurs. Under the action of magnetic force, the valve body will produce corresponding actions. The two-position two-way solenoid valve has one inlet and one outlet. The two-position three-way solenoid valve controls the liquid with one inlet and two outlets. The pneumatic directional control solenoid valve has one intake and one exhaust. The hydraulic system has one oil inlet and one oil outlet.
Types of solenoid valves
Pulse solenoid valve, high-temperature solenoid valve, explosion-proof solenoid valve, high-pressure solenoid valve, vacuum solenoid valve, steam solenoid valve, water solenoid valve, gas solenoid valve, liquid solenoid valve, gas solenoid valve, fire protection solenoid valve, normally open solenoid valve, normally closed solenoid valve, general-purpose solenoid valve, direct-acting solenoid valve, pilot-operated solenoid valve, stainless steel solenoid valve, two-position three-way solenoid valve Three-position five-way solenoid valves, etc.
Common faults of pneumatic solenoid valves
1. The wiring terminals of the pneumatic solenoid valve are loose, or the wire ends have fallen off
If the pneumatic solenoid valve is not electrified, the wire end can be tightened.
2. The coil of the pneumatic solenoid valve is burned out
The wiring of the pneumatic solenoid valve can be removed and measured with a multimeter. If it is open-circuited, the solenoid valve coil is burned out. The reasons are that the coil gets damp, causing poor insulation and magnetic leakage, which leads to excessive current inside the coil and burns it out. Therefore, it is necessary to prevent rainwater from entering the solenoid valve. In addition, if the spring is too hard, the reaction force is too large, the number of coil turns is too few, and the suction force is insufficient, the coil can also be burned out. In case of emergency, the manual button on the coil can be moved from the "0" position during normal operation to the "1" position to open the valve.
3. The pneumatic solenoid valve is stuck
The fit clearance between the spool sleeve and the valve core of the pneumatic solenoid valve is very small (less than 0.008mm), and it is generally assembled as a single piece. When mechanical impurities are introduced or there is too little lubricating oil, it is very easy to get stuck. The treatment method can be to insert a steel wire through a small hole in the head to make it spring back. The fundamental solution is to remove the solenoid valve, take out the valve core and valve core sleeve, and clean them with CCI4 to ensure that the valve core moves flexibly within the valve sleeve. When disassembling, pay attention to the assembly sequence of each component and the position of external wiring to ensure correct reassembly and wiring. Also, check whether the oil mist lubricator's oil spray holes are blocked and whether there is sufficient lubricating oil.
4. The pneumatic solenoid valve is leaking air
Air leakage can cause insufficient air pressure, making it difficult to open and close the forced valve. The reason is that the sealing gasket is damaged or the slide valve is worn, resulting in air leakage in several cavities. When dealing with the fault of the pneumatic solenoid valve in the switching system, an appropriate time should be selected to handle it when the solenoid valve is de-energized. If it cannot be completed within one switching gap, the switching system can be paused to handle it calmly.
Common fault locations of pneumatic solenoid valves
The solenoid valve coil is burned out, foreign objects enter the solenoid valve core and get stuck, and the sealing ring of the solenoid valve core is worn. The small air holes around the valve body of the pneumatic solenoid valve are blocked.
Fault diagnosis and handling of pneumatic solenoid valves
If the valve suddenly stops working and it is not due to the valve itself after inspection, then check the solenoid valve. First, manually press the switch button on the solenoid valve to see if the solenoid valve can exchange air. If not, disassemble and clean the interior of the solenoid valve body and the switch button. Check the solenoid valve coil. After powering on, insert a metal object into the coil hole. If it cannot be attracted, measure whether there is a power supply. If not, check the power supply and deal with it. If there is, replace the solenoid valve coil. Check whether the air source pressure is above 0.2MPA. Do not check the air source and adjust the air filter pressure-reducing valve to increase the pressure.
Note that when repairing pneumatic solenoid valves, extra caution should be exercised. Since some solenoid valve coils are 220V, make sure to check carefully before proceeding to avoid electric shock.
Above is What is the use of a Pneumatic Solenoid Valve? Common faults of pneumatic Solenoid Valves are discussed. To learn more related information, visit https://www.joosungauto.com/.
