German Hydac Original New Valve DB4E-01X-350V DB4E-012-200V DB4E-01X-200V

Common faults and repair methods of solenoid valves include the following: power supply problem: first, check whether the power supply is connected, whether the power supply line is damaged, and whether the power supply voltage meets the rated voltage requirements of solenoid valves. If the power supply is normal, the problem may be the solenoid valve itself. Coil problem: check whether the solenoid valve coil is damaged, whether the coil joint is loose, and whether the coil pull-in voltage is sufficient. If the coil is short-circuited or open-circuited, it is necessary to measure the resistance value of the coil to determine whether it is normal. Internal structure problem: check whether the internal structure of the solenoid valve is in good condition and whether it is blocked or stuck. If it is found to be blocked or stuck, it should be cleaned or replaced in time. Seal problem: check whether the solenoid valve seal is damaged, whether the installation position is reasonable, and whether there is air leakage at the pipeline joint. If air leakage is found, it is necessary to readjust the installation position or repair the air leakage. Noise and heat problems: check whether the internal structure of the solenoid valve is loose, whether the heat generated during operation is too high, and whether the friction between the solenoid valve and the pipeline is too large. If the noise is too high or the heat is too high, it is necessary to fasten the relevant components or check whether the cooling system works normally. Working principle of solenoid valve: Take the two-position five-way solenoid valve as an example, its valve core has two positions and five ports (one air inlet, two air outlets and two air outlets). When the coil is energized, the static iron core generates electromagnetic force, which makes the pilot valve act, and compressed air enters the pilot piston of the valve through the air passage. After starting the piston, the passage is opened to realize the conversion between air intake and exhaust. Through the above steps, we can effectively diagnose and solve the common faults of the solenoid valve and ensure its normal work.