proportional valve drift
proportional valve drift
(OP)
Hi
I'll try to briefly describe my problem: My hydraulic circuit (the pumps are supplying 130 bars of pressure) consists of a closed-center proportional valve that drives a hydraulic motor (which is used for rotating 3 ton coils in a rolling mill)
I removed the pressure reducing valve (before the proportional valve) that was set to 90 bars in order to speed up rotation time of the platform but after a few days of normal performance on 130 bars the proportional valve lost 'zero position' (spool was shifted around 3%). Since this happened on 2 identical machines I'm quite sure that it wasn't a coincidence. I readjusted the zero but I had to return the pressure reducer and therefore slow down the cycle again. Could somebody give me an explanation what happened?
I'll try to briefly describe my problem: My hydraulic circuit (the pumps are supplying 130 bars of pressure) consists of a closed-center proportional valve that drives a hydraulic motor (which is used for rotating 3 ton coils in a rolling mill)
I removed the pressure reducing valve (before the proportional valve) that was set to 90 bars in order to speed up rotation time of the platform but after a few days of normal performance on 130 bars the proportional valve lost 'zero position' (spool was shifted around 3%). Since this happened on 2 identical machines I'm quite sure that it wasn't a coincidence. I readjusted the zero but I had to return the pressure reducer and therefore slow down the cycle again. Could somebody give me an explanation what happened?





RE: proportional valve drift
Hope this helps!
Heather's focus: Alloy Valves Duplex Valves Super Duplex Valves Monel Valves Inconel Valves Titanium Valves & 6 Moly Valves
RE: proportional valve drift
You forgot to include the article...
Patricia Lougheed
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RE: proportional valve drift
h
Hope this helps!
Heather's focus: Alloy Valves Duplex Valves Super Duplex Valves Monel Valves Inconel Valves Titanium Valves & 6 Moly Valves
RE: proportional valve drift
Tom
RE: proportional valve drift
RE: proportional valve drift
Good luck,
Maytag
RE: proportional valve drift
Increasing pressure tends to have negative effects on many types of valves...again I am not expert on this particular type, but above is what I would be looking at.
Ciao