1. The steam solenoid valve is a step-action direct pilot solenoid valve. It can be divided into normally closed solenoid valves according to the different open and closed states when the power is cut off. and normally open solenoid valve.
2. Normally closed steam solenoid valve. After the coil is energized, the armature first drives the auxiliary valve plug to lift under the action of electromagnetic force. The fluid on the main valve cup flows through the auxiliary valve. When the pressure on the main valve cup is reduced to a certain value, the armature drives the main valve cup and uses the pressure difference to open the main valve cup and allow the medium to flow. After the coil is powered off, the electromagnetic force disappears and the armature falls back due to its own weight. At the same time, relying on the medium pressure, the main and auxiliary valves can be tightly closed.
3. Always openSteam solenoid valve After the coil is energized, due to the suction effect, the moving iron core moves down, pressing down the valve plug of the auxiliary valve, closing the auxiliary valve, and the main valve The pressure in the cup rises. When the pressure rises to a certain value, the pressure difference between the upper and lower main valve cups is the same. Due to the action of electromagnetic force, the moving iron core loses its position under the main valve cup, compresses the main valve seat, and the valve closes. When the coil is powered off, the electromagnetic suction force is zero, the auxiliary valve plug and the support iron core are lifted upward due to the action of the spring, the auxiliary valve is opened, and the main valve cup is pushed up using the pressure difference, and the main valve is opened and the medium flows.
Steam solenoid valve installation methods and precautions
1. When installing steam solenoid valve products, be sure to read the product installation instructions carefully. The instruction manual details the product model, specifications, usage, working environment and other parameters, which is very important for the installation of the product.
2. Before installing the steam solenoid valve, clean the pipes with clean water to avoid pipe blockage due to foreign matter, which may easily cause mechanical failure.
3. Maintain a good environment around the installation of the steam solenoid valve, and avoid installing the solenoid valve in an environment with puddles or where water vapor is easy to condense, which may increase the risk of solenoid valve failure. The possibility of reducing solenoid valve Thes’ service life.
4. Ordinary steam solenoid valves cannot be used in dangerous and explosive working environments. If the steam solenoid valve needs to have explosion-proof performance, it should be explained to the manufacturer in advance.
Correct installation can maintain the normal operation of the equipment and extend the service life of the equipment. So during the maintenance stage of the equipment, how should we operate it correctly?
1. Regularly clean the dirt inside and outside the steam solenoid valve and the suction surface, and be careful not to damage the sealing surface.
2. If the steam solenoid valve is not used for a long time, the manual valve in front of the valve should be closed. When reactivating, clean the condensed water in the valve first, and put the equipment into trial operation. After the equipment is normal, it can be put into use.
3. When the steam solenoid valve needs to be disassembled and packaged for storage, first use compressed air to clean the valve body parts and the inside and outside, maintain a clean and tidy storage state, and store In a clean, dry environment.
4. When used for a long time, if the seal between the piston and the valve seat is not good, the piston sealing surface can be ground again and then ground with the valve seat.
5. Finally, when the steam solenoid valve is working, you need to pay attention to the pressure gauges before and after the valve to keep the valve within a reasonable pressure range.
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