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Location: Pune, India
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Solenoid Valve Burning Problem

07/17/2012 1:29 PM

We have Messer profile cutting machine. It is in operation for last few years. Recently we are facing problem. The solenoid valve coil connected to gas console (Hiperther make)burns out with in few hours continuous. This solenoid valve is used for control to air, O2, N2 combination. The solenoid valve operates at 110V AC. (make Norgren)

We have cleaned air /gas manifold, removed all pipes and checked seals (soloneid valve seat) checked voltage supplied & current. Current specification is 0.2 A, where as current recorded is 0.8 A. Could not find out reson for high current.

Any one can help to resolve the problem

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-Pratap Chavan
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#1

Re: Solenoid Valve Burning Problem

07/17/2012 1:47 PM

I suspect that the moving iron core slug that gets drawn by the solenoid is not getting fully pulled into the field. This keeps the inductance too low and thus the current is too high. If you measure the coil resistance and the inductance with the slug in and out the impedance and then the expected current can now be calculated.

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#2

Re: Solenoid Valve Burning Problem

07/17/2012 2:28 PM

Maybe someone has changed the 0.5A fuse for a 5A one?

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Power-User

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#3

Re: Solenoid Valve Burning Problem

07/17/2012 11:59 PM

I have to ask: Are you using a valve rated for 60 Hz on 50 Hz power?

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#4

Re: Solenoid Valve Burning Problem

07/18/2012 9:06 AM

Also what could affect is the orientation of the solenoid itself, placing them vertical generally is what it is designed for, so if it is at an angle it should not cause this problem but could affect it enough that it does not seat properly and keeps drawing too much current causing the burnout.

It is extremely rare but it has happened.

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Join Date: Jan 2012
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#5

Re: Solenoid Valve Burning Problem

07/18/2012 11:46 AM

To expand on redfred's great comment:

If the solenoid is of the removable type and is encased in a housing, you need to insure that this housing is correct for the valve core/solenoid combination and in the correct position. If it is out of alignment enough it will not pull the core into the field far enough and will cause over current and blow your fuse (or burn up the coil if held too long).

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#6

Re: Solenoid Valve Burning Problem

07/18/2012 1:35 PM

Dear All,

Thanks for your feedback.

There are 11 solenoid in the machine. 3 solenoids mounted in horizontal direction, others are mounted in vertical direction. alignment is checked & found OK. We will check for alignment and fuse rating.

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#7

Re: Solenoid Valve Burning Problem

07/27/2012 11:49 AM

We had faced similar problems; I will try to mention a few points you should look into.

1. See the voltage and frequency mentioned in the coil itself and not on the body of the valve and see for any discrepancy. A coil rated for 60 Hz if given 50 will heat up and finally burn out. The reverse may cause chatter.

2. See if it is meant for DC operation

3. See if the coil is getting the proper voltage (Check by measuring ) . Undervoltage will cause chattering and ultimate burn out.

4. See if the coil fits snug into the core , ( in case you are not using the coil by OEM )

5. it is not clear what you mean by Cuirrent Specification but if that is the figure (0.2.amp)

mentioned in the valve body and is taking 0.8 amp, something is wrong. Pl make the above checks

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#8

Re: Solenoid Valve Burning Problem

09/27/2012 10:51 AM

Maybe , I am out of topic, but, looking for connector similar to DIN 43650

Can anyone help me locate this. Required urgently.

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