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#24674 - 04/18/03 06:47 AM Power Plant lube oil problems
rmiell Offline

Registered: 11/09/00
Posts: 261
Loc: La Junta, Co. USA
Our electric power plant has numerous lube oil heaters, tanks that have strip heaters surrounding them to keep the oil at around 160 degrees. I lost a control on one. Replaced it with another one which had a shorter cap tube. (old = 10", new = 4"). Now unit will not heat up oil before sensor senses top limit. Use infrared heat gun to test temp at cap tube, (which is mounted in a small metal tube welded to outside of inner tank, right next to heating elements), and it showed around 230 degrees.

Q1: Does the length of the cap tube need to be as long as the one I took out?

Unit is Hoffman-Allen brand. I can find no info on that company. They were in Springfield, Ill. when this unit was made, and installed in our plant, circa 1940.

Q2: Anyone have any links to them?

You can email me for any more info you need to help me with this problem.


Rick Miell

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#24675 - 04/18/03 01:35 PM Re: Power Plant lube oil problems
Bjarney Offline

Registered: 04/10/02
Posts: 2561
Loc: West-Southern Inner-Northeast ...
Long shot — Does the new sensing bulb contact the bottom end of the well? There may be a remote chance of inadequate heat transfer if not.

#24676 - 04/18/03 04:04 PM Re: Power Plant lube oil problems
Trumpy Offline


Registered: 07/05/02
Posts: 8532
Loc: SI,New Zealand
I reckon that the sensor is too close to the heater, just a thought.
Or you've got the wrong wattage element.
Let's face it, these days if you're not young, you're old - Red Green grin


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