Why is My Solenoid Valve Getting Hot?

Solenoid valves in construction machinery are key hydraulic control components and they play an important role in various applications. However, sometimes we notice that solenoid valves become abnormally hot during operation. This phenomenon can have a negative impact on equipment performance and longevity. Below we will explore why solenoid valves get hot and provide some solutions.

 

How solenoid valves work

A diesel solenoid valve is a device that controls the flow of liquid or gas by activating a solenoid coil with an electric current. When an electric current passes through the solenoid coil, it creates a magnetic field that will attract or repel a moving part, usually a spool, which opens or closes the fluid passage.

 

Causes of Solenoid Valve Heat

Excessive current

When a solenoid valve is improperly designed or used with high pressure fluids, the current may exceed the design parameters. This causes the resistance within the coil to rise and the electrical energy is converted to heat, causing the solenoid valve to heat up.

 

Prolonged operation

Long periods of continuous operation can also cause solenoid valves to heat up. In case of continuous operation, the solenoid coil may become very hot as it does not have enough time to cool down.

 

Frequent Startup and Shutdown

Frequent startup and shutdown of the solenoid valve may also lead to heating. Each startup requires a certain amount of current surge, which can cause the solenoid coil to heat up, especially when operated at a high frequency.

 

Effects of solenoid heating

Reduced life expectancy

Overheating of solenoid valves can lead to damage to internal parts, which can shorten their lifespan. This will increase the maintenance costs and downtime of the unit and may affect the proper functioning of other diesel engine parts.

 

Performance degradation

High temperatures can affect the performance of a solenoid valve. The resistance of the solenoid coil increases as the temperature rises, which may result in the spool not opening or closing fully, reducing the accuracy and efficiency of the system, and may also affect the normal operation of other parts of the equipment such as the starter motor and alternator.

 

Solutions to solenoid valve heating

Use the right solenoid valve

First, make sure the solenoid valve you select is capable of withstanding the operating conditions of your application, including pressure and temperature ranges. Using solenoid valves that are rated for the right parameters can reduce the incidence of heat problems.

 

Add cooling measures

Adding additional cooling measures to the solenoid valve, such as a heat sink or fan, can help reduce the temperature and extend the life of the solenoid valve.

 

Reduce frequency

If possible, reduce the frequency with which solenoid valves are started and shut down to minimize the heat generated by the solenoid coils.

 

The proper functioning of your solenoid valve is critical to your construction machinery. If your solenoid valve is experiencing unusual heating problems, take prompt action to resolve the problem. By choosing the right solenoid valve, adding cooling measures and reducing the frequency, you can reduce the heating problem of the solenoid valve and improve the performance and reliability of your equipment. At the same time, regular maintenance and servicing are key to ensuring that your solenoid valves work stably for a long period of time.