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The range of electromagnetic valves on the market is truly rich and diverse. Individual models differ in the medium for which they are intended, its temperature and pressure, type and size of connection, functions, control, or power supply. In this article, we will take a closer look at electromagnetic valves designed for 24 V voltage.
Generally speaking, electromagnetic valves are used for regulating the flow of gaseous and liquid media through piping. Depending on the type, they can be used for closing, opening, mixing, or distributing flows into individual circuits. If the valve is used for drinking water, it must have the appropriate certification.
An electric valve contains a coil (solenoid) that generates a magnetic field under voltage and moves the valve piston.
In the case of a NC system (normally closed), the valve is closed without voltage, open under voltage.
In the case of a NO system (normally open), the valve is open without voltage, closed under voltage.
From the above, it follows that electromagnetic valves require electrical energy to function. As with all electrical appliances, it is also necessary to consider the voltage of the electrical network for electromagnetic valves. The voltage can be:
12 V: It is most common in passenger cars but is also used for sockets, for example, in bathrooms. Such low voltage is safe and essentially poses no risk of electric shock.
24 V: It is most common in trucks, buses, etc.
110 V: It is most common in the case of a regular electrical network in North and South America. In the Czech Republic, this voltage was used in the past, and the last networks with 110 V voltage were modernized to higher voltage at the turn of the millennium.
230 V: It is currently the most common voltage of a regular electrical network in most of the world, except for North and South America.
With increasing voltage of the electrical network, the current load on the conductors decreases, making the network more efficient, economical, and capable of handling much greater energy consumption.
Electromagnetic valves with 24 V voltage are mainly used in large vehicles, such as buses and trucks. You can find them:
in vehicle engines, where they are primarily used for regulating the oil supply to the engine,
in the gearbox,
but also, for example, in air horns and other accessories.
Electromagnetic valves 12 V have similar uses as those intended for 24 V, but in passenger cars.
In our range, you will find electro valves suitable for a 24 V network, both for alternating and direct current. The highest quality models of electromagnetic valves are manufactured by brands TORK, Danfoss and Peveko.
An example of an electromagnetic valve with wide application is the Danfoss EV220B DN 15. In this valve, coils can be changed to achieve the desired voltage and protection. The clip-on system ensures easy and quick coil replacement without the use of tools. Suitable media include water, oil, steam, compressed air, and gas. The medium temperature can reach up to 90 °C and the pressure 16 bar.
This valve features an internal thread size of ½”, which is one of the most universal types of connections. As it is a two-way type, it is suitable for closed circuits where it can open and close the flow of liquid or gas. The high-quality brass body of the valve guarantees long life even under demanding operating conditions (aggressive media, etc.).
Danfoss solenoid valve.
Besides the Danfoss brand, the manufacturer TORK is also a guarantee of the highest quality. Its stainless steel valve T-GP104 DN 20 is suitable for water, including drinking water, as it meets the relevant NSF/ANSI 61 certification. Other suitable media include air, neutral gases, and mineral oils. Coils, and thus the voltage, can be changed.
Thanks to the stainless steel construction of the internal parts and IP 65 protection, this electromagnetic valve is characterized by long life and high resistance to the effects of various media. It can easily withstand liquid or steam temperatures up to 130 °C. It connects with an internal thread size of DN 20 (other connection sizes are also available).
The most common cause of electrovalve failures is mechanical impurities, which settle mainly on the seals. This results in leaks, so the valve may allow liquid or gas to pass even when closed. With greater contamination, the piston can seize.
All solenoid valves should therefore be used with mechanical filters, which prevent solid impurities from entering the valve body. Filters are always installed on the piping before the valve. If you do not use a filter, it is necessary to regularly clean the membrane and the valve body.
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