supermarket refrigerated showcase » article > display freezer > display cases Indirect-acting solenoid valve
display cases Indirect-acting solenoid valve
display cases Indirect-acting solenoid valve
display cases Indirect-acting solenoid valve (two-opening solenoid valve) The structure of indirect-acting solenoid valve is more complicated than that of direct-acting solenoid valve, which is suitable for pipeline communication. Large diameter or high pressure occasions. Working principle: When the coil is connected to the power supply, a magnetic field is generated, which sucks up the core iron, and the valve hole of the auxiliary valve is opened, so that the upper part of the piston is connected to the back of the valve. The pressure in this space drops rapidly to the pressure behind the valve. The pressure behind the valve is lower than the pressure in front of the valve, so a pressure difference is formed up and down the piston, so that the piston moves upward and the valve is opened; when the coil power is cut off, the magnetic force disappears, and the core iron is under the action of the spring force and its own weight. The valve hole of the auxiliary valve is closed by falling. At this time, the medium in front of the valve enters the upper space of the piston through the balance hole on the piston, so that the pressure in the upper space is equal to the pressure in front of the valve. The piston moves downward under the action of spring force and its own weight to close the display cases valve. The advantage of
indirect acting solenoid valve is: the solenoid valve coil only manipulates the core iron with very small size and quality. Due to the opening of the auxiliary valve valve hole, the pressure of the liquid (or gas) medium in the pipeline is used for self-sufficient amplification to form pressure If the valve is bad, the piston is pushed to open the valve, so regardless of the size of the solenoid valve, the solenoid head including the coil can be made into a common size, thus reducing the quality and size, and facilitating serial production. The characteristic of the indirect acting solenoid valve is that it can use the pressure difference of the medium before and after the display cases to self-amplify and provide the driving force required for the main valve to open. Therefore, the magnetic force of the solenoid coil is not required, which is conducive to the serialization of the pilot valve. Universal. The selection of solenoid valve: Generally, the solenoid valve with the same pipe size is configured according to the size of the pipeline, and the valve body material suitable for the medium in the device should be selected.
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