CNC People - Vacuum Pumps

[andy_con]

it clearly says

This pump is rated for continuous use, however it should not be left un-attended and the oil oil level must be monitored.

[mixedgas]

A proper single stage pump that can take the air load looks more like this, a classic Cenco.

http://www.ebay.com/itm/Central-Scie...item48648e1434

Its easy to mod the Cenco for cooling the oil, too...

Any oil based pump your going to use is going to do a massive imitation of a poorly designed oil based hazer. So you need oil coalescing on the output. This can range from a tall piece of pipe, to steel wool in a can, to a professional coalescing rig.

Steve

[andy_con]

i dont want to buy a second hand unit, you never know what your getting and what state its in

[mixedgas]

They are on the order of 700-900$ new. Second hand units are easily checked with a 20$ vacuum gauge for the units your looking for.
The low cost units sold for refrigeration service will not last in your application and obtain a poor ultimate vacuum. That forces you onto dual diaphragm pumps if you do not wish to do a little work.

Rebuild kits are readily available for all major brands of pumps, inexpensively. Cenco rarely changes the design, and it is not uncommon to see a 40 year old pump in service.

Steve

[Bbe]

I clearly saw how it fumes and stinks. shit in a word. More or less good diaphragm pump - 500...900€

it clearly says

[andy_con]

link ?

[mixedgas]

Bbe, sounds like you've had a bad experience. Pump oil usually has a mild smell at best, after all its designed to be low vapor pressure. Old pump oil (or the wrong oil) gets ate by bacteria and smells.


Andy: I like KNF dual diaphragm pumps, which is two pumps connected in series.

http://www.knfusa.com/products/oem-p...d-compressors/

Ingersoll Rand is good, there are lots of others.

Again, rebuild kits consisting of a new rubber diaphragm, a seal, and a rubber check valve are readily available for diaphragm pumps rated for vacuum.

Steve

[Bbe]

gas, I mean the creepy smell that appears when overheated

Bbe, sounds like you've had a bad experience. Pump oil usually has a mild smell at best, after all its designed to be low vapor pressure. Old pump oil (or the wrong oil) gets ate by bacteria and smells.

link? Do not look at devices for $200

link ?