Quote:
Rickertsen2
In the case of a vacuum system like this there are two factors you need to determine before choosing a system. They are how strong of a vacuum do you need, and in what time do you need to develope this vacuum. Once you figure out how strong the vacuum you need is, look at the datasheet for the pump system. They will usually have a table that will say "it will take X long to pump Y volume of air down to Z pressure".
|
Quote:
Swampdude
It sounds like you're trying to pull a negative pressure on a trailer? One of the questions would be how fast do you need to do it, and what is the desired negative pressure? When you say you want to suck the air out, you really need a goal as to what condition you want to leave the space in. Are you also trying to remove oxygen, or get an inert environment etc?
Any pump/hp will eventually get you to some level of negative pressure, given its required length of time. You just need to decide the time, and the desired pressure - or am I missing something?
|
Rick:
Without, the PSI, I can’t answer the HP we need. And without the HP we can’t figure out what amount of PSI is needed to get the results we are looking for. The time, we want a large amount of air, in seconds. 680cubic ft was my estimate of the amount of air sucked in a min. Again I’m no expert, just estimation. We have plenty of datasheets on pumps as you are suggesting, however without a formula to guide us in the proper direction to put factual numbers, this is all guess work.
Swamp:
Your right swamp, negative pressure on a trailer. The faster the better, as far as speed is concerned. We want everything completed in a full min. Which means we need a large volume of air, coming in rapidly in seconds to do so. We don’t know the desired amount of negative pressure, as that’s why I’m requesting for the formulas to be able to get that bit of information and/or also from the HP rating aspect of this dilemma. I wish to leave the space intact and not cause the contents inside the trailer damage. We are trying to get the inert environment. Your right on the time aspect, I’m sorry I left that bit of information out. But this post should cover that aspect. As far as the desired pressure/horsepower is the problem.
Thanks again everyone, for taking the time to read thus far and help with this matter.
-Wilson