Coil for Volvo 210B excavator parts solenoid valve

The solenoid valve coil height 61mm inner diameter 21mm
One：
1, Solenoid valve factory solenoid valve coil short circuit or open：Detection method: First use a multimeter to measure its on-off, resistance value tends to zero or infinity, that coil short circuit or break. If the resistance value measured is normal (about tens of euros),It does not mean that the coil must be good (I once measured a solenoid valve coil resistance value of about 50 ohm, but the solenoid valve could not operate, everything is normal after replacing the coil), please conduct the following final test: Get a small screwdriver and put it near the metal rod in the solenoid coil. Then energize the solenoid valve. If it feels magnetic, then the solenoid coil is good, otherwise it is bad. Solution: Replace the solenoid valve coil.
2, plug/socket problem: solenoid valve factory solenoid valve fault phenomenon: if the solenoid valve is the kind of plug/socket, there may be metal spring socket problems, plug wiring problems (such as the power line connected to the ground wire) and other reasons can not be sent to the coil power. It's best to get into the habit of unscrewing the retentive screw after the plug is in the socket, and unscrewing the retentive nut after the spool rod on the coil. If the plug of the solenoid valve coil is equipped with a LED power indicator, then the use of DC power to drive the solenoid valve will be connected to the right line, otherwise the indicator will not be bright. In addition, do not switch power plugs with leds for different voltage levels. This will cause the leds to be burned/the power supply (replace with a lower voltage level plug) to short circuit or the leds to emit very weak light (replace with a higher voltage level plug). If there is no power indicator light, the solenoid valve coil is not differentiated polarity (unlike the transistor time relay whose coil voltage is DC and the coil with diode/resistance leakage circuit in parallel for DC intermediate relay, need to distinguish polarity). Treatment method of solenoid valve manufacturer: correct wiring errors, repair or replace plugs and sockets.
3, the valve spool problem: fault phenomenon 1: in the case of the solenoid valve through the medium pressure is normal, press the solenoid valve red manual button, the solenoid valve does not have any reaction (pressure medium no on-off changes), indicating that the valve spool must be bad. Treatment method: Check whether there are problems in the medium, such as whether there is a lot of water in the compressed air (sometimes the role of the oil-water separator is not very big, especially when the pipeline design is poor, the compressed air through the solenoid valve will have a lot of water), whether there are a lot of impurities in the liquid medium. Then remove water or impurities in the solenoid valve and pipeline. If not, please repair (if you have the time, patience and necessary ) or replace the spool, or simply replace the whole solenoid valve. Fault phenomenon 2: After inspection, the coil is the original coil and the coil is energized when the magnetic normal, but the solenoid valve still does not act (then the solenoid valve manual button function may be normal), indicating that the valve core is bad.
Two: There are many kinds of solenoid valve, there are control gas, liquid (such as oil, water), most of them are wire trap on the valve body, can be separated, the spool is made of ferromagnetic material, by it when the coil is energized when the magnetic pull valve, by the valve to complete the valve to open or close. The coil can be removed separately. The solenoid valve is used to control the opening or closing of the gas pipeline. The movable core in the solenoid valve coil is attracted to move when the valve is energized by the coil, driving the spool to move to change the valve on state.
1, the reason for the heating of the solenoid valve coil when the solenoid valve coil is according to the working state (energized), the core is sucked, forming a closed magnetic circuit. That is, the inductance is timed under the maximum state. The heating is normal, but when the core is energized, it can not be smoothly sucked, coil inductance is reduced, impedance is reduced, current increases correspondingly, which leads to coil current is too large, life is affected, so oil pollution, impurities, deformation and so on, the core activity is blocked, the action is slow when energized, even can not be normally fully sucked, so that the coil energized often in a less than normal impedance state, That's what causes the coil to heat up.
2, the solenoid valve coil is good or bad to confirm the resistance of the solenoid valve with a multimeter, the resistance of the coil should be about 1K ohm! If the resistance of the coil is infinite, it means open circuit, if the resistance of the coil tends to zero, it means short circuit, it should be replaced with a new one.
3, The magnetic force size of the solenoid valve coil is related to the wire diameter and the number of turns of the coil and the magnetic area of the magnetic steel, that is, the magnetic flux. The DC electromagnetic coil can be pulled from the iron core; If the AC coil is removed from the iron core, the current of the coil will surge and burn the coil. There is a short circuit ring inside the AC coil core to reduce vibration. No short circuit ring is required inside the iron core of the DC coil.
4, solenoid valve coil price on the market wholesale price is not fixed, different manufacturers, different product models used solenoid valve coil price will be different, cheap more than ten , medium in 50-80, good in 100, there are also more than 100 of the price.
5, solenoid valve coil problems: Q: recently the solenoid valve solid coil broken phenomenon. The resistance of the normal coil is about 1~2 hundred ohms. When it is broken, the circuit is broken. Do not know what reason will appear solenoid valve coil broken, according to the reason that solid coil should not be easy to break. Some say it is because of the power supply (only use 220VAC mains power instead of UPS uninterruptible power supply). TG2531-10M two-position five-way solenoid valve power supply is DC24V, 24V power supply is converted from the uninterruptible power supply 220VAC inlet switch power supply. Can't it really be power supply with mains electricity 220VAC conversion? ? What's the reason? A: I think the main reasons are as follows: Coil damp, caused by bad insulation and magnetic leakage, causing the coil current is too large and burned, so to prevent rain into the solenoid valve in addition, the spring is too strong, reaction force is too large, coil turns too few, suction is not enough can also make the coil burned, power under normal circumstances will not often go wrong, if the power failure, The bad ones are a batch, not one by one.
Three: solenoid valve coil in industrial application is more special, mainly because the voltage used by the solenoid valve is relatively high voltage, the general coil, can not meet the requirements, at this time you need to make this material to meet its needs. Solenoid valve coil is specially developed for use in this equipment lock, so there are fixed customer sources on the market, sales have been relatively stable. Solenoid valve coil is an important part of the solenoid valve equipment, without it, the coil will not be able to operate. Generally speaking, the production of both is in a factory, which is a finished product produced by an enterprise for another factory that needs to be used. Through the use of this equipment, to control a variety of substances. Because the existence of this equipment to solve the problem that has been puzzling people, promote the speed of industrial development. This kind of equipment is quite flexible in control, control precision is also very high. Solenoid valve coil occupies this important position in the market, the demand in the society is also more, the sales of this equipment in the market has been more.
Four: solenoid valve coil in the use of solenoid valve occupies an important position, without this special coil, the whole equipment has no way to normal operation. This equipment is mainly used in the control of industrial equipment, to control some parameters of industrial intermediates. In the use of help people save the control of manpower, making the operation more mechanized and intelligent. After the use of the solenoid valve coil must be regularly maintained on it, only in this way to ensure the normal operation of the whole equipment. The coil should be cleaned for a long time, so as to prolong its service life. According to different solenoid valve on the coil of different protection work. Some need to prevent corrosion, and some need to do high temperature protection work, otherwise there will be problems when the coil is used, can not be used, thus affecting the development of the work. After the use of the solenoid valve coil and put in the proper place for storage, and other equipment to be placed separately, in order to prevent the wrong coil, to bring unnecessary trouble to the work. Regular maintenance work, more convenient to provide services.
Five: (1) Before installation, carefully read the instructions of the product, check whether the product fully meets the requirements for use, be familiar with the installation points, and do a good job in preparation. (2) When installing the solenoid valve coil upward, and maintain a vertical position, the arrow or mark on the solenoid valve should be consistent with the pipeline flow direction, shall not be installed in the place where there is water splashing or leakage. (3) The working medium of the solenoid valve should be clean without particle impurities. The dirt and filter on the surface of the solenoid valve inner parts should be cleaned regularly. (4) When the solenoid valve fails, in order to isolate the solenoid valve in time and ensure the normal operation of the system, it is best to install the bypass device. (5) Do not install the valve in the low recess of the pipeline, so as not to precipitate steam condensate and impurities in the valve and hinder the operation. (6) ordinary solenoid valve can not be used in inflammable and explosive dangerous occasions. (7) In the case of insufficient pipeline rigidity, it is recommended to fix the front and rear pipes of the valve with supports to prevent vibration when the solenoid valve is working. (8) Before installation, we should pay attention to see the product label, read the instruction manual carefully, and judge whether the product meets the conditions of use. (9) The pressure gauge should be installed on the pipeline before and after the solenoid valve to observe the pipeline pressure.