Dimensions du séparateur d'huile et du réservoir de condensat Maxwell Hemmens

J'ai récemment pu acquérir une unité de vapeur Maxwell Hemmens Max II presque inutilisée et en très bon état, qui a depuis été brièvement testée avec de l'air comprimé huilé.

Avant de la faire fonctionner à la vapeur, j'aimerais ajouter un séparateur d'huile et un réservoir de condensat de type Maxwell Hemmens. Comme je ne peux pas en trouver un d'occasion, j'aimerais en faire une réplique à l'échelle 1:1 (parce que j'essaie de garder les installations à vapeur aussi proches que possible de leur état d'origine).

Quelqu'un possède-t-il un tel séparateur et réservoir de condensat ? J'apprécierais beaucoup que ce membre du forum me contacte pour échanger les dimensions de base de ces éléments.

Merci bien
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Hi I have a Hemmens Steam Plant happy to supply any measurements or information you need. [Vous devez être inscrit et connecté pour voir ce lien]

Hello !
Lovely steam plant !
I guess that Mege66 will be happy to have the answer !
Mege66, tu n'as plus qu'à demander !....
J'avais complètement zappé cette question.
Merci David !

I have now taken the steam plant off the shelf and measured the oil separator it is 25mm dia by 62mm long. The larger reservoir for the condensate is 50mm dia by 84mm long, the two bosses are spaced from one end 22mm and 53mm from the same end. Hope this helps

Hello !
Mege66 must be lost in the Swiss forest !

Not lost in the Swiss woods KBIO, just lost at work because I still have to work for a few more years. Whether I will have more spare time once retired is a completely different question...


Thank you DBS88, you have a very nice steam plant.

You have sent us the most important dimensions. Others can now be calculated based on your values forwarded and dimensions taken from the photos you have sent.
What is always interesting to know are the thread sizes. I assume that the larger ones are ME 1/4" threads and the smaller ones ME 3/16" threads. Are the pitches 32 or 40 TPI?

If you haven't already put the steam plant onto the shelf, then I would dare asking you to upload more, exactly orthogonal closeup photos from the top and the side. These pictures would allow to derive the dimensions even more accurately, inluding any radiuses (or is it radii?).

Hi here are some additional photos, if you need more please let me know. The threads are 5/16 26 (top of the tank), 1/4 40 and I have not disconnected the small pipe from the seperator to check, but the small pipes outside dia is 3/32. Note at the bottom of each end of the reservoir there is a plug 1/4 40.
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We know that Maxwell Hemmens is a respected older manufacturer of model steam components, however I must admit this is the first time I have seen a de-oiler as a standalone component

Most/many of today's manufacturers produce a combined de-oiler waste container, and assuming the secret  is the oriface within the de-oiler that the oily steam passes from, without causing an undue back pressure within the engines exhaust system  

Derek....[the emoticons only appear at the end of the text, not as placed]

Hello !
First time I see a "Double Expansion Exhaust" !
I am not too sure of the interest of such a "double?" de-oiler.
Maybe some one can explain...
Have a good "dye" ! (like they say in Ireland !!

Thank you DBS88 for posting the excellent photos which are exactly what I was looking (and hoping) for. Together with the dimensions sent by you earlier this will allow to produce a nice copy of the deoiler and condensate tank.

About the sense and nonsens of a separate deoiler I am not really the right person to answer. Maxwell Hemmens steam plants are stunningly nice pieces of completely over engineered steam equipment, and maybe the reason was just to make the steam plants look more interesting and more attractive? Kind of steam lingerie maybe

The small size of the condensate and oil separator certainly increases the risk of condensate and oil carried over into the exit and beeing thrown out through the exhaust pipe, giving the operator a nice and oily shower. Been there, done that: The Topaz I have recenly bought (and which is fitted with an original Martin Baylis separator) showed exactly this behavour when testing the Cheddar Gemini in the bath tube with more than 3/4 open throttle. It took quite some time to clean the bath after the test... I am going to add a diffusor the the end of the exhaust pipe to provent from further oil showers and the max throttle setting will be reduced as well.

But eventually Maxwell Hemmens was clever and inserted some baffle plates inside the separator to prevent condensate from being dragged into the exhaust?

Don't worry DBS88, I am not going to ask you to cut your separator in two pieces to check...

HIi DBS88

I am durrently designing the CAD models for both condensate tank and separator.

Based on the top view photo of the condensate tank posted by you, I calculated a distance of about 23 mm between soldering bush centers and tank ends.
You wrote that the tank has a length of 84mm and that the bushes are positioned at 22 mm and 53 mm from one end. While your 22mm and my 23mm are very close, I am not shure aboiut the 53mm ddistance of the the second bush which would be 31 mm from the tank side.

The photo looks as if the bushes are rather spaced symmetrically. Eventually the 53mm should be 62mm. Would you be so kind and recheck the position of the connectors on the tank top to get it really right?

Thank you.

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Here another rendering, showing the separator:
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And here, on this final rendering, the proportions of both units - spaced at about 1.5 inch - can be better seen:
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Bonsoir!
C'est du beau boulot ! Tu vas finir part avoir une reproduction exacte !
Bravo !

You have made a lovely job of the drawings, well done, here are some more photos to help.
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Thank you DBS88, you help is much appreciated!

the virtual design is now almost completed. It looks quite right to me, but any hints on dimensional corrections are still welcome.

Next job is the (to me) not so simple task of end plate production. I've never done that before and always used what is available from vendors.

Does anybody in the forum have good typ or a link to a really useful "how to produce flanged end plates" or a film about hobbyists metal spinning on YouTube?

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