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Generic valve coil replacement PDF Print E-mail
Thursday, 23 October 2008 20:45

Some days ago the environmental chamber from Blue M borke down (again). This time it turned out to be the coil for a cooling media valve. The valve is made out of a pin with a coil around it. When the coil is energized (in any direction, mind) the middle pin will be "drawn" into the center, opening the valve.

Ok, so this valve, which was a MKC-1 type from Sporlan, was burned. Would probably not be a problem if it wasn't for the fact that it was an old one made for 120VAC which is quite uncommon in Europe. Parker in Sweden (who has this valve in their product line) was confused when we called and couldn't help us. Email to the international site resulted in a compact silence.

The machine was down and people started to panic. What to do? Well here is the quick, dirty but functional solution:

SolenoidWe bought a 24VDC solenoid from Kuhnke (ELFA 54-603-73, Kuhnke H-6206). The center hole is 13mm in diameter which fits our 0.5" pin of the valve. We put it on and also bought a small transformer with 2x 115VAC primary windings and 2x12VAC secondary windings. The primary side we parallel coupled and we put the secondary windings in series, feeding a rectifier and a small capacitor.

Seems to be a bit of a clumsy solution but it worked and we got the macine up within two days.


Last Updated on Friday, 24 October 2008 08:22