Search found 5 matches

by daghike
Thu Mar 03, 2011 3:06 pm
Forum: FAQs: Vacuum Technology
Topic: #2 FAQ - Mechanical Pump - Diffusion pump?
Replies: 41
Views: 28618

Re: FAQ - Mechanical Pump - Diffusion pump?

<t>Thanks Alex, <br/> <br/> I have gotten down to 2*10-6 since I added 100ml more of oil.. There is definitely a small leak inside that is hindering the pump down. its not a big one thats why its hard to find it. <br/> <br/> for ex. when roughing the chamber the pressure was lower than when just bac...
by daghike
Wed Mar 02, 2011 6:43 pm
Forum: FAQs: Vacuum Technology
Topic: #2 FAQ - Mechanical Pump - Diffusion pump?
Replies: 41
Views: 28618

Re: FAQ - Mechanical Pump - Diffusion pump?

<t>Thanks Richard *2 <br/> <br/> a few things to try. I have fresh mech pump oil and mech pump by itself was pumping down fine to its usual limits. <br/> the voltages are ok. this system has worked before so its definitely something with the oil or oil levels or leaks ( although leak tests didnt sho...
by daghike
Wed Mar 02, 2011 3:21 pm
Forum: FAQs: Vacuum Technology
Topic: #2 FAQ - Mechanical Pump - Diffusion pump?
Replies: 41
Views: 28618

Re: FAQ - Mechanical Pump - Diffusion pump?

<t>Thanks Richard. <br/> <br/> yes the temps are ~ 230F. <br/> <br/> the pressure rises when it heats up and didnt go back down till its cooled down. <br/> <br/> this leaves the tree and internal pathway of the vapor and condensate not behaving properly. <br/> <br/> is it possible it could also be a...
by daghike
Tue Mar 01, 2011 10:55 pm
Forum: Vacuum Technology (& FAQs)
Topic: Vacuum system difficulties
Replies: 2
Views: 1221

Vacuum system difficulties

<t>Hello, <br/> <br/> I have a problem with a diffusion pump and mech pump that I need some help with. <br/> I read previous posts but couldnt find a similar problem. <br/> <br/> the mech pump brings the pressure down to 1*10-2 torr. but when the diffusion pump is on it rises to 5*10-2torr. <br/> <b...
by daghike
Tue Mar 01, 2011 10:55 pm
Forum: FAQs: Vacuum Technology
Topic: #2 FAQ - Mechanical Pump - Diffusion pump?
Replies: 41
Views: 28618

Re: FAQ - Mechanical Pump - Diffusion pump?

<t>Hello, <br/> <br/> I have a problem with a diffusion pump and mech pump that I need some help with. <br/> I read previous posts but couldnt find a similar problem. <br/> <br/> the mech pump brings the pressure down to 1*10-2 torr. but when the diffusion pump is on it rises to 5*10-2torr. <br/> <b...