Author Topic: Diaphragm vacuum pump brands  (Read 918 times)

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Vaaguh

  • Guest
Diaphragm vacuum pump brands
« on: January 17, 2004, 04:58:00 PM »
I have been looking for a while to purchase a diaphragm vacuum pump that is able to handle aggresive vapors and is able to achieve a vacuum of 8 mbar.

These are the 2 pumps i have been able to find to do these things:

The ILMVAC MPC 101 Z pump :

(8mbar/16,5L per min transport capacity)

and the KNF Laboport N810.3FT.18 :

(8mar/10L per min transport capacity)

Does anyone have experience with one of the 2 pumps or a smiliar pump from the same brand, and what where the results?

The lowest price i was able to find for both pumps is around 1050 euro/1311 usd should i look further ?

Could anyone having worked with the laboport vac pump tell me where the gas outlet is located as i dont seem to beable to find it on the picture.
 
Are there any other good/cheap diaphragm vacuum pump brands i should look at?


Osmium

  • Guest
> Does anyone have experience with one of...
« Reply #1 on: January 17, 2004, 05:32:00 PM »
> Does anyone have experience with one of the 2 pumps or a
> smiliar pump from the same brand, and what where the results?

I have worked with the KNF pumps and Vacubrand pumps which seems to be quite similar to the ILMVAC, and the results were very good.

> The lowest price i was able to find for both pumps is around
> 1050 euro/1311 usd should i look further ?

I doubt you will get them any cheaper than that.

> Could anyone having worked with the laboport vac pump tell
> me where the gas outlet is located as i dont seem to beable
> to find it on the picture.

The picture of the KNF pump doesn't show the 8mbar model. The 8mbar model has two pump heads (those white hexagonal thingies on top, the one in the picture has only one). The outlet is located on the same side as the inlet, and it looks the same. The one in the picture is one of those shitty 80-100mbar models, and the outlet must be on the other side of the pump head.

> Are there any other good/cheap diaphragm vacuum pump brands
> i should look at?

The de-facto standard vacuum pump manufacturer for laboratories is Vacuubrand in my corner of the world. Very high quality pumps, but they aren't cheap at all.

This is their most basic equivalent, the MZ2-C, which seems to be comparable to the above ILMVAC pump:



They use this pump in many of their fancy chemistry vacuum systems like this one, it's just the basic MZ2-C with 1500-2000€/$ worth of accessories:




http://www.vacuubrand.com




Osmium

  • Guest
Keep in mind that such a pump is not always...
« Reply #2 on: January 17, 2004, 05:38:00 PM »
Keep in mind that such a pump is not always adequate for ketone distillation. For MDP2P it's best to use an oil pump.


hest

  • Guest
More vacuum
« Reply #3 on: January 17, 2004, 06:55:00 PM »
I have some Vacuubrand pump's and love them. Iff you use an cold trap they last for ewer, iff not you have to shift the washer (gasket ?) 1-2 times a year( cost 130 euro).
Wee also have some KNF pumps. The best thing with them is that the washer is round, and you will bee able to make them by your self.

Vaaguh

  • Guest
ok
« Reply #4 on: January 17, 2004, 09:54:00 PM »
Thanks for the information, i think im going to purchase the ILMVAC pump they both seem to be high quality products however the ILMVAC has a higher flow rate.


Keep in mind that such a pump is not always adequate for ketone distillation. For MDP2P it's best to use an oil pump.




The pump is ofcourse only meant as an better alternative for the aspirator  :) .


Iff you use an cold trap they last for ewer, iff not you have to shift the washer (gasket ?) 1-2 times a year( cost 130 euro).




What does this gasket/washer do?

I had the idea since these pumps are able to handle agressive vapors they would be pretty much maintenance free.




hest

  • Guest
Gasket
« Reply #5 on: January 18, 2004, 11:01:00 AM »
The gasket (right word ??) is the peace of plastic that prevent the air from running backword in the system.
No pump's will work with agresive vapors day after day.

Osmium

  • Guest
> The gasket (right word ??
« Reply #6 on: January 18, 2004, 01:26:00 PM »
> The gasket (right word ??) is the peace of plastic that prevent
> the air from running backword in the system.

You mean the valves.
Hobbyists will most likely never have to replace them, since they do not use their pump for 8 hours on 300 days per year.


Sasquatch

  • Guest
KNF
« Reply #7 on: March 16, 2004, 10:45:00 PM »
I've used a KNF one for years, running 24/7 sometimes and it is solid.  It was the 30L/min, 29.7mm one.  It was two stage.  The only problem I had with it was that sometimes some vapour would condense in the diaphragm and the strength of the vacuum would go down, but that was my fault. 

I've seen the vacuubrand ones - very nice and expensive, and some three/four stage ones pull a very strong vacuum.

It's a heavy little thing and not cheap.  It is easy to take apart and clean.  I used a re-built Welch for ketone distillation.  I can't remember all the model numbers and prices, it's been years.. 

It's perfect for evaporating solvents because the inside is solid teflon and you can bubble the exaust into a pail of water to help with vapors.

Vaaguh

  • Guest
happy with the ILMVAC
« Reply #8 on: March 16, 2004, 11:29:00 PM »
I have bought the ILMVAC 8mbar model and i have to say that im really content with it. In the manual there is a detailed section where all parts are described, they and can be separately ordered if anything should break.


evilpharm2000

  • Guest
vac pump
« Reply #9 on: July 01, 2004, 08:22:00 AM »
swim uses lebold divac 2.2l it is pimp(owned for 4 years no problems )