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Keep your Hydraulic Solenoid from failing!

Keep your Hydraulic Solenoid from failing!

Hydraulic system components such as Cetop Solenoid Valves are used to form a hydraulic circuit. These are common components and are often used in hydraulic powerpacks and standalone hydraulic manifold blocksCetop Solenoid Valves have been intelligently designed to effectively control the start, stop and direction of the oil flow within the hydraulic circuit.

Cetop 3 and Cetop 5 Solenoid Valves are available in 12VDC, 24VDC, 110VAC and 220VAC and have a four-landed control spool. These can be rectified using a rectified Hirschman. The Solenoid Coils move the spool position so that the direction of hydraulic oil flow can change.

AC vs DC!

DC Hydraulic Solenoids can be seen to be more reliable to use and easier to maintain than AC Hydraulic Solenoids. However, using an AC Solenoid eliminates the needs for a step-down transformer which is necessary for DC Solenoids. In different applications such as industrial the response of AC Solenoids can be faster.

Silt-Locking & Prevention

Mechanical problems can be caused by contamination within the solenoid valve. Hard or soft small micron sized particles can find their way into the valve which can result in the spool becoming stuck because the force required to move the spool increases. This is known as Silt-Lock. Silt-locking can be prevented by regular maintenance of the solenoid valves and filtration of the oil

 How To Prevent Your Cetop Coil From Burning Out

Something to be wary of when it comes to Hydraulic Solenoid Valves is the temperature increase of the Solenoid Coils and how it effects the overall function. If the Solenoid Coil overheats then it will fail and therefore the hydraulic valve will therefore cease to function.

For AC electric solenoid coils the resistance for the coils is at its lowest when the solenoid is open. Resistance then increases when the solenoid goes into its closed position. Therefore, the current of the AC solenoid is at its highest when the solenoid is open and the lowest when the solenoid is closed. Inrush current is the high current which is formed when the AC Solenoid is open. Holding current is when the AC Solenoid is closed and the current is at its lowest. The heat dissipates only when the AC Solenoids generate their holding current. Therefore, it's important for the solenoid to be closed completely when the AC Solenoid is energized. 

The high inrush current creates more heat than can be continuously dissipated by the solenoid. If the solenoid cannot completely close due to a mechanical problem such as silt-locking then the solenoid coil will burn and short out.

How To Stop Your DC Solenoid From Burning Out?

DC Solenoids do not have the same problem as AC Solenoid Valves by the fact that they do not burn out if the solenoid does not completely close due to silt lock. However, DC Solenoids will burn out if the wrong voltage is applied. For example, if a 12VDC is connected to a 24VDC supply then the current draw of the solenoid coils will double due to its fixed resistance and therefore burn out.

Can We Tempt You?

If you’re searching for reliable hydraulic products, come to Flowfit. We have a wide selection of products to choose from including, valvespumps and hoses, we even have a ‘build your own hose’ option.

If you have any questions regarding any of our products and would like to contact our team, you can do so in a variety of different ways:

·  Send your questions to us using live chat (you can find this on the right hand side of your browser)

·      Contact us by telephone by ringing 01584 876 033

·         Send an email to

·         Or you can use our online enquiry form

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