Steam solenoid valves are electronic components designed for steam media. What we call steam is a hot gas, or water vapor. If water is heated to a certain temperature, it can reach more than 200 degrees. Although steam solenoid valves must be made of metal, and seals must be made of special high-temperature brake solenoid materials, and the body configuration requires a radiator, they are widely used in discharge systems in power stations and evaporators.

Steam solenoid valve structure features:

Heat resistance: shift solenoid valve solenoid seal part of the use of special high temperature resistance electrical materials and sealing materials, and the use of various insulation measures to improve wear resistance: material selection is reasonable, large solenoid valve valve cup and guide sleeve clever use of fluid lubrication, to reduce wear, prolong service life, anti-condensate; The condensed water in the steam pipeline is an important factor affecting the action of the steam solenoid valve, but it is not affected by the condensed water. Steam solenoid valve is made of fluorine plastic, silicone rubber, copper and excellent alloy materials. Because of its heat dissipation device, high heat resistance, low price.

Vapor saturation vapor minus 2. Steam-overheating phenomenon in thermal power plants;

The temperature and pressure below 250℃, saturated steam and working pressure are less than 1.6Mpa, relatively stable.

The temperature and pressure vary greatly in high temperature steam, the temperature can reach more than 400℃, and the working pressure is less than 4.0Mpa.

Working principle of steam solenoid valve:

Place the electromagnet on the solenoid valve and the connecting rod is raised to turn the shaft and the valve opens. When the auxiliary valve is opened, the pressure fluid is discharged from the upper part of the main valve cup, so the pressure in the lower part of the main valve cup is higher than the upper part. After the main valve is opened, the upper and lower pressures are equal, and the valve cups are opened under the joint action of the electromagnetic force and the upper and lower pressures. After power failure, the auxiliary valve closes under the action of the armature weight and return spring. After the secondary valve is closed, the pressure on the main valve cup increases, and the pressure on the main valve cup decreases to realize the cut-off seal and close the valve.

Normally closed: The solenoid valve is normally closed. When the coil is started, the electromagnetic force generated attracts the movable core, and the valve opens to enter the channel. Disconnect coil, magnetic field disappears, moving core reset, close.

Main brake: solenoid valve main brake. The coil is energized to produce magnetic force, and the armature moves downward under the action of magnetic force, and the valve closes. When the coil is cut off, the magnetic force is zero, and the main valve opens, due to the action of the spring, the valve opens.