Steam turbine turning, or barring, refers to the process of using steam pressure to rotate the rotor to the starting speed during turbine startup. The purpose of turning is to enable the turbine rotor to reach a certain speed and have the ability to start on its own, in order to facilitate further start-up of the turbine.

During the turning process, by controlling the inlet and outlet steam volumes of the steam turbine, the rotor is accelerated to a certain speed, while maintaining a certain proportion of the inlet and outlet steam flows to ensure the safety and stability of the turning. This process requires the use of specialized solenoid valves to control the start stop, speed regulation, and stop operations of the steam turbine, such as the solenoid valve 23D-63B, which is a commonly used solenoid valve for controlling the inlet and exhaust of oil in steam turbine barring gear.

The working principle of the valve is: when the electromagnetic iron is energized, it will attract the piston, making it connected to the valve core, thereby changing the position of the valve core and controlling the inlet and exhaust channels.

The main technical specification of the 23D-63B turning solenoid valve is as follow:

Working voltage: AC220V, DC24V

Working pressure: ≤ 16MPa

Working temperature: ≤ 350 ℃

Inlet and outlet diameter: DN40

Applicable media: Non corrosive media such as water, steam, oil, gas, etc

As the manufacturer of the 23D-63B solenoid valve, Yoyik reminds that this valve is one of the very important control components in steam turbine turning device. The following points should be noted during use:

Correct wiring: The wiring of the turning solenoid valve should be carried out according to the wiring diagram of the solenoid valve. At the same time, it is necessary to fix the wiring terminals of the solenoid valve to ensure good contact and prevent loosening or poor contact.

Regular inspection and maintenance: To ensure the normal operation of the solenoid valve, it is necessary to regularly inspect and maintain the solenoid valve. The inspection includes the fixation of the wiring terminals, the suction of the electromagnet, and the jamming of the valve core. Maintenance includes cleaning, lubrication, replacing seals, etc.

Prevention of overload and overvoltage: When using solenoid valves, it is necessary to pay attention to preventing overload and overvoltage. For areas with unstable voltage, it is necessary to install a voltage stabilizer to prevent damage to the solenoid valve due to high or low voltage.

Prevention of corrosion and pollution: During use, attention should be paid to avoiding corrosive media or impurities from entering the interior of the solenoid valve to ensure its long-term stable operation.