TOPIC:

I've just extracted the seal ( at work )
Its a double lip, with the inner sealing surface quite wide. Its also made of a kind of silicon rather the normal nitrile nbr, ( NE7150 )
The outer lip has worn a noticeable groove in the shaft, and the inner one has also worn away the shaft.
I'm unsure if the sloppy fit of the 6001 bearings on the shaft have contributed to this accelerated wear.
Photos to come

The seal size is 12 x 26 x 7. After researching this on the interweb, I'm fairly sure this is nothing special, just a TC type seal, double lip with gaiter. The inner lip seems to have worn quite flat.
Not sure what grade of stainless steel the shaft is made from, but its not particularly hard and scratches easily with a file.
On the original pump, does anyone know if the shaft was hardened, or hard chromed?

Joachim, do the Burgmann ceramic seals have an inner sleeve?

Ive included a bad ipad photo of the shaft wear and seal

Hi

Thank You

Hey forgive me if this has already been said.

Have you contacted Peter at Pemopa, I have always found him excellent. I am sure he would be interested and would assist in the best way he could.
The damage all seams a bit odd.

The seal should not wear the shaft like that! and its not corrosion it is wear? and the slack bearing also odd.

The seal is a bit special (not simple seal) but available.

And yes the original pumps use a two part ceramic seal.

But all said, I would talk to Peter at Pemopa.

Please continue to keep the forum updated of how you get on.

Thanks again

Pete

P.s You have a Pemopa pump fitted.... what happened to the original?

Yes its wear not corrosion. Yes I will contact Peter. Unfortunately several people I know would take issue that Peter is excellent to deal with, myself included.
Don't get me wrong, I appreciate the considerable effort that he must have put into organising
the re-engineering of this pump.
The original pump started screaming. I've only recently retrived it from storage...I 'm quite keen to refurbish it.
I was kinda hoping Peters pump would be the final solution so to speak.

After a non response from Pemopa, I am taking matters into my own hands and getting the Pemopa pump shaft remade, so that a ceramic seal can be fitted.
The modification to the shaft design involves moving and shortening the keyway slightly on the impeller end.
I am also getting a number of original pump shafts made. Tolerance on the shaft where the bearings sit will be improved, i.e. tightened up to a push fit.
The shafts will be made of a high tensile stainless so no final hardening will be necessary.

I decided to redo the Pemopa shafts, because I had bought three of them, and to try and recoup the considerable investment in purchasing them. I don't have much confidence in the rotary seal that has been fitted, or the hardness of the shaft.

Its going to take about three-four weeks because of backlogs, but the price from the engineer was way cheaper that I expected. (Ex Airforce engineer that builds race car parts)

Count me in for 2, I assume they are the same shaft as the 500 Saturno ones as well.
I would need one for an original pump and one for a Pemopa pump.