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Solenoid valve installation and routine maintenance
Solenoid valve is one of the commonly used valves in automatic control system. It is favored by users with its low price, easy to use, convenient and reliable (can directly accept the switch control signal of PLC or DCS). Of course, even the best things have to be used when it can play its due function, the following put the solenoid valve in the installation and use of maintenance issues that need attention to a brief explanation. Installation Notes: 1, first check the solenoid valve is consistent with the selection parameters, such as power supply voltage, medium pressure, pressure, etc., especially the power supply, if wrong, it will burn the coil. Supply voltage should meet the rated voltage and voltage fluctuation range: AC + 10% ~ -15%, DC + 10% ~ -10%, usually coil assembly should not be opened. 2, before taking over the pipeline to be washed, the pipeline of metal powder and sealing material residues, rust and other removal. Should pay attention to the cleanliness of the media, if the media mixed with dirt, impurities and other obstacles to the normal work of the solenoid valve, the pipe should be installed filters or filters. 3, the general electromagnetic solenoid valve solenoid valve components should be upright, vertically installed in the level of the pipeline on the ground, if space constraints or operating conditions must be installed according to the side, to be made in the selection and ordering. Otherwise, the solenoid valve may not work properly. 4, before and after the solenoid valve should be manually cut off valve, should be set at the same time bypass, easy solenoid valve maintenance. 5, the solenoid valve is generally oriented, can not be installed anti, usually in the body with → indicate the direction of medium flow, the installation should be installed in accordance with the direction indicated. However, in a vacuum line or under special circumstances can be reversed. 6, if the media will start hammering phenomenon, then you should use the solenoid valve with water hammer function or take appropriate preventive measures. 7, try not to let the solenoid valve is energized for a long time, so easy to reduce the service life of the coil or even burn the coil, that is, normally open, normally closed solenoid valve can not be used interchangeably. 8, steam solenoid valve inlet side should be equipped with traps, where the takeover should be tilted. Solenoid valve common fault and exclusion 1, the solenoid valve does not work after power: Check the power wiring is bad → re-wiring and connector connection; check the power supply voltage is within the working range - → transferred to the normal position range; check the coil is off Welding → re-welding; short circuit coil → coil replacement; import metering pump working pressure is not appropriate → adjust the pressure difference → or replace the appropriate solenoid valve; fluid temperature is too high → replace the appropriate solenoid valve; Valve core and moving core stuck → cleaning, if the seal is damaged, replace the seal and install the filter; the liquid viscosity is too high, the frequency is too high, and the service life has been to → replace the product. 2, the solenoid valve can not be closed: the main spool or ferrous core seal has been damaged → replace the seal; fluid temperature, viscosity is too high → replace the opposite solenoid valve; impurities into the solenoid valve main spool or moving core → cleaning; spring life has been to or deformation → replacement; orifice balance hole blocked → timely cleaning; working frequency is too high or life has been to → re-election product or update the product. 3, Other conditions: internal leakage → check the seal is damaged, the spring is bad assembly; external leakage → loose connections or seal has been bad → tight screw or replace the seal; noise when the power → loose head fasteners, tighten . Voltage fluctuation is not within the allowable range, adjust the voltage. Core suction surface impurities or uneven, timely cleaning or replacement. More keyword search: Solenoid valve