Vacuum pump beast

[GnicGnoc]

I stumbled upon an edwards e2m2 vacuum pump for a steal of a deal. I have been using water aspirators and my vacuum sealer pump for the past couple years as vacuum source. This thing is a beast, I was able to filter liquid from boiling rue using medium lab filter paper in about 20 minutes. I don't know to much about vacuum pumps, there's a spot where I think a vacuum gauge can be hooked up between the controller and the hose input. does anyone know if there's a specific gauge that would be best or what my options are? Also any general knowledge of vacuum pumps would be appreciated.

 

[Jees]

Thats like a Transformers equipment :lol:

If there is a srew-thread connection where the arrow points at, you might incorporate there a T connection and srew a manometer in the 3rd hole.

 

[GnicGnoc]

LOL, it's a beast.

Actually on the top of that cylinder there is a screw thread but there are metal prongs surrounding it. Maybe the metal prongs are just there for support and any vacuum gauge will work? I just don't know enough about vacuum pumps. There are part numbers on the cylinder, I'll have to google it.

 

[GnicGnoc]

I lied its not threaded but its definitely some kind of connection

 

[GnicGnoc]

I found out what it is, a thermocouple vacuum gauge tube. I guess I would have to get the controller.

 

[benzyme]

google: pirani gauge

 

[GnicGnoc]

Dang benzyme, is that your pump? Whats the hose hooked up to the outlet for? If you have experience operating pumps i would appricate any advice. I looked up pirani gauge. I think its similar but not the same, i might be missing something? After looking up the part number i found its a thermocouple vacume gauge tube, i just need the display that shows the reading, i think they refer to it as the controller. Still not sure about that part.

 

[benzyme]

they work on the same principle. the pirani gauge is essentially a thermal conductivity vacuum gauge.
[YOUTUBE]

my pump has a hose on the outlet to vent vapors outside a window. it's a forepump, to a turbomolecular pump.

 

[Jees]

... i just need the display that shows the reading, i think they refer to it as the controller. Still not sure about that part.

This is where you should focus on your needs: do you need vacuum control by the thermocouple-gauge? I guess that black knob is a manual vacuum control set-point already? If so then you don't need extra automatic control of vacuum level. Then you have fair enough with a manometer cheap solution to see what you manually tuned with that black knob.

I suppose any industrial readout hardware of the thermocouple-unit is going to cost more than a manometer which for our purposes is way more than enough. Where to screw? As I said maybe the thermocouple-unit connection has screw thread part to build on to, if not maybe the nipple where the tube goes onto has a screw thread part to build onto?

 

[GnicGnoc]

Hey jees you are correct, the black knob allows control of vacuum. Your also correct about the thermocouple control being expensive and definite over kill. I could remove it and put a manometer in there, but if I can find a used control for a good price I will go that route. When ever I get new equipment I get obsessed for a month or two and tend to go a little overboard with it.

Benzyme, I still need to do my research on the pirani. If you know of any places to get a controller compatible with the thermocouple tube (used would be good) that would be awesome. Also is there off brand pump oil that you know of, I came across inland 19. Do you know what the filter in the gas ballast is made of?

Thanks people you have been awesome

 

[benzyme]

probably stainless steel mesh.

I recently put Murray vacuum pump oil in mine, it doesn't complain.

 

[GnicGnoc]

Hey benzyme thanks for your input. I have one more question. Do you know anything about traps, for removing solvent vapors and other corrosive vapors from acids and bases? Should I be worried about water vapors? I have a visi-trap coming in, is this enough or should I have a series of traps depending on what I'm doing?

 

[benzyme]

nope, that looks perfect.

 

[GnicGnoc]

sweet