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What is the function of vacuum packaging mechanical and electrical solenoid valve?

2020/08/07
Many customers to use, but they know little about machine's main electrical accessories. Take out of air inside the bag, to the expected after vacuum degree, complete sealing process. Is used widely in food industry, vacuum packaging, all kinds of cooked products, such as chicken, ham, sausages, grilled fillet, beef jerky, etc; Pickled products such as all kinds of pickled vegetables and soy products, dried fruit, etc are used more and more various need fresh food vacuum packaging. After vacuum packaging of food freshness long, greatly extend the shelf life of food. A kind of heat pumping air into vacuum state, sealing, cooling the one-time completed function, apply to food, aquatic products, chemical raw materials, electronic components, precision parts and other products of vacuum sealing, can prevent oxidation, mildew, corrosion, moisture, but also extend the product with good quality fresh storage life of the machine.

in particular, need some custom vacuum packaging machine for the customers when they don't understand why in the configuration solenoid valve, or don't know when it comes to after-sales maintenance when what is need to change the electrical equipment. Together today, editing and you know the solenoid valve in the role of the vacuum packing machine. Solenoid valve is a basic element, is used to control the fluid automatic belongs to the actuator, it is not limited to hydraulic, pneumatic. Solenoid valve used to control the direction of hydraulic flow. The plant's machinery and equipment generally controlled by the hydraulic steel, so the solenoid valve will be used. Working principle of electromagnetic valve, solenoid valve in a closed cavity, in a different position with through-hole, each hole leads to different tubing, the cavity of the valve is among, both sides are two electromagnets, electromagnetic coil which side of the body which will be drawn to the side of the electricity.

by controlling the movement of the valve body, different drain blockage or leakage, the inlet opening normally open, the hydraulic oil into the different drainage pipe, recycled rigid piston hydraulic drive, the piston drives the piston rod. The piston rod drive mechanism. In this way, by controlling the electric current of the electromagnet to control the mechanical movement. Above is the general principles of electromagnetic valve. In fact, according to the temperature and pressure flow in the medium, such as the pressure of the pipeline and their status is no pressure. Solenoid valve work in a different way. In their conditions, for example, requires zero voltage start, after electrify, coil as a whole to absorb the door. The electromagnetic valve with the stress state is in coil body sucked out from the gate after the power supply pin, lock body by jacking the pressure of fluid itself. The difference is that of the two methods of electromagnetic valve in their state, because the coil to absorb the whole lock body, so the stress of large volume, electromagnetic valve need to attract the feet, can do the work of a relatively small volume.



direct acting solenoid valve: principle: electricity, electromagnetic force, the electromagnetic coil will close section, up from his seat valve open; Power, the electromagnetic force disappears, the spring will close some pressure on the seat, the valve closed. Features: under vacuum and negative pressure, zero pressure can work normally, but the path is generally not more than 25 mm. Distributed direct acting solenoid valve: principle: it is the combination of direct acting and pilot operated principle of differential pressure when the inlet and outlet, the electricity, the electromagnetic force directly to the pilot valve and main valve lift, in turn the valve to open. When to start the pressure difference between inlet and outlet, after electrify electromagnetic force to guide the small valve, the main valve pressure inferior vena, upper chamber pressure is reduced, thereby using differential pressure will be the main valve lifting; Used when the power is cut off, the pilot valve spring force or medium pressure push off, move down, to close the valve.

features: can be work under zero differential pressure or vacuum high-pressure, but power is bigger, it must be installed level. Guiding type solenoid valve: principle: energized the electromagnetic force to open the guide hole, the cavity pressure drops rapidly, closed form around the low and high pressure, fluid pressure boosting up close, open valve; When cut off power supply, spring force close the pilot hole, hole inlet pressure through the bypass around the shutoff valve rapid formation of low and high pressure difference. Fluid pressure will close down and close the valve.
is frequently used by people in daily life since it can improve weigher machine and checkweigher.
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