FESTO solenoid valve maintenance instructions

What should I pay attention to when maintaining the German FESTO solenoid valve? How to maintain the best? If you do double-bit automatic adjustment and remote control of the media in the pipeline. Structural features: High temperature resistance: The metal hard seal is used to increase the operating temperature. Medium fluid temperature up to 350 °C Wear resistance: Reasonable material selection, FESTO solenoid valve and guide sleeve skillfully use the lubrication of the fluid to reduce wear. The lever principle is used to ensure complete isolation of the coil and the valve body. Structural principle: When the solenoid valve is energized, the connecting rod is lifted, the rotating shaft is rotated, and the auxiliary valve is opened. Since the secondary valve is opened, the pressure fluid in the upper portion of the main valve cup is discharged, so the pressure in the lower portion of the main valve cup is higher than the upper portion, so that the lower pressure pushes the main valve cup upward. After the main valve is opened, the upper and lower pressures are equal, and the valve cup is placed in equilibrium under the action of electromagnetic force and upper and lower pressure, and the valve is opened. When the power is off, under the action of the armature weight and the return spring, the auxiliary valve is closed, and after the auxiliary valve is closed, the pressure of the upper part of the main valve cup is raised, and the main valve cup is pressed down to achieve the shut-off sealing function, and the valve is closed. .

1. FESTO solenoid valve has a small clearance (less than 0.008mm) between the spool and the spool. It is usually assembled in one piece. When mechanical impurities are introduced or the lubricating oil is too small, it is easy to get stuck. The treatment method can use the steel wire to break in from the small hole of the head to make it bounce back. The fundamental solution is to remove the solenoid valve, take out the valve core and the valve core sleeve, and clean it with CCI4, so that the valve core can move flexibly in the valve sleeve. When disassembling, pay attention to the assembly sequence and external wiring position of each component, so as to reassemble and wire correctly, and check whether the oil mist injection hole is blocked and the lubricating oil is sufficient.

2. FESTO solenoid valve leaks. Leakage can cause insufficient air pressure, making it difficult to open and close the forced valve due to damage to the gasket or wear of the spool to cause several cavity helium.

3. FESTO solenoid valve terminal is loose or the wire head is off, the solenoid valve is not allowed to be energized, and the wire end can be tightened.

4, FESTO solenoid valve coil burned out, the solenoid valve wiring can be removed, measured with a multimeter, if the circuit is open, the solenoid valve coil burned out. The reason is that the coil is damp, causing poor insulation and magnetic leakage, causing the current in the coil to be too large and burning, so it is necessary to prevent rainwater from entering the solenoid valve. In addition, the spring is too hard, the reaction force is too large, the number of turns of the coil is too small, and the suction force is insufficient to cause the coil to burn. For emergency handling, the manual button on the coil can be turned from the “0” position to the “1” position during normal operation, causing the valve to open.