What Size Vacuum Pump For Auto Ac

Please register to participate in our discussions with 2 million other members - information technology's gratuitous and quick! Some forums tin can only be seen past registered members. After you create your account, you'll be able to customize options and access all our xv,000 new posts/day with fewer ads.

06-08-2010, ten:41 PM

teach1234 946 posts, read 2,440,267 times Reputation: 508

Point being, is this Harbor Freight vacuum pump able to draw as good a vacuum as a pro-type pump, but it takes longer getting there, or is it not able to pull equally high a vacuum? Anybody know?[/quote] The HF pump volition pull vacuum fine, but probably volition not terminal. As in all else, you get what yous pay for. The HF pump will last for a yr, maybe, whereas a Robinair that you tin can buy off ebay volition last the rest of your life. On an a/c organization you are merely pulling -18 of vacuum, max, and any vacuum pump is capable of that. The question is how much hassle y'all are willing to put up with. Equally DYI it may make sense to purchase a cheap one and drive to the tool shop for the warranty every year. You tin can purchase a practiced used Robinair for 100-125 on ebay plus 30 bucks for shipping--my experience with them is they are tanks, heavy and built to last for a lifetime. Pay a piddling and lose some time, or pay a lot and accept no worries. They will all do the job, it but depends on how long you desire them to do that job.

06-09-2010, 11:06 AM

wheelsup xiii,808 posts, read 25,131,229 times Reputation: 14183

Quote: Originally Posted by teach1234 The HF pump will pull vacuum fine, but probably will not last. Every bit in all else, you go what you pay for. The HF pump will concluding for a year, perhaps, whereas a Robinair that you tin buy off ebay will final the rest of your life. On an a/c organisation you are just pulling -eighteen of vacuum, max, and any vacuum pump is capable of that. The question is how much hassle you are willing to put up with. As DYI it may brand sense to buy a cheap one and drive to the tool shop for the warranty every year. Y'all tin buy a good used Robinair for 100-125 on ebay plus 30 bucks for aircraft--my experience with them is they are tanks, heavy and congenital to last for a lifetime. Pay a little and lose some time, or pay a lot and take no worries. They will all do the job, information technology just depends on how long you want them to do that job. Most people that buy HF stuff don't utilize information technology every solar day. I don't see how you can assume the pump volition only last a yr if its bought and used once, even once a year. The reviews for the small Harbor Freight pump have been good on diverse forums.

06-09-2010, 11:42 AM

rbohm 33,414 posts, read 31,392,558 times Reputation: 19956

Quote: Originally Posted past teach1234 Point being, is this Harbor Freight vacuum pump able to draw every bit good a vacuum as a pro-blazon pump, simply it takes longer getting there, or is it not able to pull as high a vacuum? Everyone know? The HF pump volition pull vacuum fine, simply probably volition non concluding. As in all else, you go what you pay for. The HF pump will last for a yr, mayhap, whereas a Robinair that you lot can buy off ebay will last the rest of your life. On an a/c system you are merely pulling -18 of vacuum, max, and any vacuum pump is capable of that. The question is how much hassle you are willing to put upward with. As DYI it may brand sense to buy a cheap one and drive to the tool store for the warranty every twelvemonth. You can buy a skillful used Robinair for 100-125 on ebay plus 30 bucks for shipping--my feel with them is they are tanks, heavy and built to last for a lifetime. Pay a piffling and lose some time, or pay a lot and have no worries. They volition all do the job, it just depends on how long you want them to exercise that job.[/quote] if he were opening up an a/c shop and going to be doing it everyday, and so i would never have recommended the HF pump. only since he is just going to do his a/c organisation, and perchance that of his friends and family, he might use the pump v or 6 times per twelvemonth at best, and even that will taper off, then the HF pump will last quite a long time, as long as he properly maintains the pump, and perhaps even if he doesnt.

06-ten-2010, xi:xx AM

Leaving123 136 posts, read 399,263 times Reputation: 82

I am a retired profesional so my tools/equipment are overkill for what yous need however;Harbor freight does take a vac-pump that will work for the ocaisional user.I use a Blue Point by Snap-on & bought information technology in 1976 & information technology works like new after all the years.This is non a rotary pump like a fast vac that the market has seemed to adopt these days,it actuall is a compresor itself similar from a refrigerator.Now with that being said yous can build your own from a used compresor very cheap and information technology should last for years.It will pull downwardly to 29 inches of vacum easily and takes less than a half hour to assemble one time all the parts are ther.Good Luck!

09-22-2014, 06:42 AM

xyzzzz 1 posts, read 17,439 times Reputation: 11

I have a double-walled drinking glass cavalcade of 25cm height ,9.3cm inner dia and 10cm outer dia.The annular space between the walls accept to be maintained under vacuum to minimise heat losses.And so,guys sugesst me which pump to use ?

09-22-2014, 01:54 PM

BostonMike7 13,505 posts, read fifteen,763,811 times Reputation: 18137

You need a pretty good vacuum pump to describe downward to 500 micron or less. That's almost almost a perfect vacuum. Nearly of the cheapo vacuum pumps can exercise maybe 25-28 in-Hq but to get down to the 29.xx that you really need to eddy out every bit of wet volition require a semi decent pump. I have used a Robinair half dozen CFM/2 phase to do then, but it'due south too a $600+ pump. You lot should actually do a triple-pump besides. Pull vacuum, fill with N2, pull vacuum, fill with N2 and and then pull a final vacuum and begin your charging process. That should help ensure you've rid the system of moisture.

09-22-2014, 01:56 PM

wheelsup 13,808 posts, read 25,131,229 times Reputation: 14183

Quote: Originally Posted by BostonMike7 You need a pretty skilful vacuum pump to draw downwards to 500 micron or less. That'due south virtually almost a perfect vacuum. Most of the cheapo vacuum pumps can do perchance 25-28 in-Hq but to get down to the 29.20 that y'all really need to boil out equally of moisture will require a semi decent pump. I take used a Robinair 6 CFM/2 phase to do then, but it'due south also a $600+ pump. You should really do a triple-pump likewise. Pull vacuum, fill with N2, pull vacuum, fill with N2 and and then pull a final vacuum and begin your charging procedure. That should aid ensure you've rid the organisation of moisture. Completely unnecessary for auto AC work.

09-22-2014, 02:00 PM

BostonMike7 xiii,505 posts, read xv,763,811 times Reputation: 18137

Quote: Originally Posted past wheelsup Completely unnecessary for auto AC piece of work. I disagree, just to each his own.

09-22-2014, 04:42 PM

ukrkoz 16,078 posts, read 22,126,994 times Reputation: 18422

I accept HF pump and it pulls 31 mm mercury in about 10 seconds on sealed system. That pump, just similar any other, will last equally much, every bit its maintenance. You have to change oil regularly and lubricate fins within. Simply you getting nowhere without Air-conditioning guess kit. This is actual Alpha in Alpha and Omega of Air conditioning servicing. Same HF shop. Got both. How To Recharge an AC System - EricTheCarGuy - YouTube

09-22-2014, 04:44 PM

ukrkoz sixteen,078 posts, read 22,126,994 times Reputation: 18422

Why it'south 30 mmHg? Cuz any ac repair transmission I read so far says to pull 30 mm Hg for 10 (or more) minutes, close it down, and allow it sit. And then check on vacuum in x (or more) minutes if information technology holds. Must be some machine ac thing. 30.

Delight register to mail service and access all features of our very popular forum. It is free and quick. Over $68,000 in prizes has already been given out to active posters on our forum. Additional giveaways are planned.

Detailed information about all U.S. cities, counties, and zip codes on our site: City-information.com.

All times are GMT -6.

What Size Vacuum Pump For Auto Ac,

Source: https://www.city-data.com/forum/automotive/998431-what-vacuum-pump-should-i-get-2.html

Posted by: hubbelldolveng.blogspot.com

Share this post