Hey everyone, another quick question. I am currently running A/I pumps with A/I ovens and i am having trouble getting my vac down to -30. i am running however 3 ovens on each pump. i understand that this is most likely my problem, my question is, if i switch to edwards pumps how many ovens can i run off a single pump. what would you recommend? please any answer would be great as i do not want to spend the money on edwards if they will just give me the same results as A/I
What’s the model of the A.I. pumps? Jw. I’m just curious what you’re running.
Cu.ft of oven & cfm of pumps are probably required to answer that correctly.
The “probably” is to indicate that I have enough experience to know I don’t know. And an admission that I’m unwilling to look at the math at the moment.
There is in fact no doubt that both are required 
We run one pump on three ovens as well. All ai and we all able to pull a full vac. We just pull a vac on each oven individually. You just use the vacuum valves on the ovens to isolate each oven. Hope this helps 
2 Likes
I was gonna say a manifold and do one oven at a time
1 Like
What elevation are you at?
1 Like
Yeah elevation may also be a factor on pulling full vac
Let’s get one thing clear.
NOBODY can pull -30” of Mercury.
-29.92” is all she wrote.
Once you get below 29” it makes sense to switch to different units.