Vacuum Techniques

[Exahertz]

Whoa I'm just asking. He does build phase units, or is building one, so i'm wondering how long. Those units can be obtained in working condition, and needing a little bit of tender love for around $300.

They are very low maintance pumps, just change the oil at set intervals and they will run for a very long time!

If all they are pumping on is a recovered phase unit it wol'nt hurt them at all. There are some pumps out there that have been in use for at least 2 hours a day 5 days a week going on 10 years. Though these companies understand that they must change the oil often in order to sustain good working performance. Clean lubrication is very critical for safety of the pumps mechanical components.

[wdrzal]

I'll tell you and show you why the snowflake tomorrow if I think about it, to tired now.

[Exahertz]

okay, you can tell me a little more about the company i work for.

[wdrzal]

okay, you can tell me a little more about the company i work for.

I will you are partly working for me.

,but probably in name only.


http://www.investorguide.com/stock-a...gi?date=082505

[Exahertz]

I will you are partly working for me.

,but probably in name only.


http://www.investorguide.com/stock-a...gi?date=082505

I don’t want this thread to drift too much (it a good thread!)

I have seen some uses in absorption chillers, but I know that the 1402 is used in refrigeration (remember, I know Welch products. I don’t talk to, or work for York). York just buys the pumps and re-stickers them. The 1402 is a versatile pump. Many distributors buy and resale them.

[1badhabit]

This is an awesome, easy to understand guide!! Thanks SS!

[Exahertz]

when filling a dry unit with oil would it be possible to fill a cup with a measured amout of oil and pull a mild vacuum on the system and then dip the hose in the cup of oil and let it suck the oil in?

what side should the oil be filled on?

[Xeon th MG Pony]

If it is a POE oil system you'd have to be very fast at it, but yes, I do this with my systems, pull a miled vacuum then let the suction side suck the oil in then pull a full vacuum.

[[486]]

i am going to buy a welch 1410 pump from my school for a 2 digit price, i don't know if i can say the real price in the open forum. they don't even know what it is!!!!

[Exahertz]

can you get a picture of the pump your buying? what does it pull down to?

[wdrzal]

To all our members Vacuum pumps do wear out,even the very expensive ones, look and ask where it came from. Some pumps get little use, and some used in industrial process run 24/7 till their vacuum become not low enough, the important thing is to check micron reading or see if seller will take return if it does not pull 250 microns @ least ,many industrial process need very low pisa. They usually send for repair or trade on new pump exahertz can verify that.

[[486]]

it was probably never used, because a manual is attached to the flywheel , which is on the top, is that a flywheel? I asked the admin at the school, and they said that they have to ask the maintaince department, it is in the woodshop, so i think they think it's a sander or something. will get pics tommorrow or the next day

[wdrzal]

1410 vacuum pump buy it. belt driven, not direct drive. small pulley on motor with larger pulley on pump. uses a V belt (tapered sides but flat at bottom of V), just like some belt on cars and like all belts on older cars.

picture of used 1410 vacuum pump,1/2 hp with belt gaurd over pulleys.

that was a 1410 i swiped off the net

[Exahertz]

I Just bought a valve core remover and would like to know just how i should use it.

Is this procedure correct?


Install the valve core puller on the system.


Screw it on to the flase access valve thus filling it with refridgerant.


remove the valve core by unscrewing it from the access valve and pulling it out.


Close the isolation valve from the core and the unit


remove the core puller head and core itself


install a yellow hose inplace of the core puller's head


pull a vacuum and remove all of the air


open the valve and allow refridgerant to backfill the hose


then start to recover the refridgerant


recover untill the pressure is down to the EPA's sugested vacuum (25 in.hg I think).



then pull a deep vacuum on the unit


close the isolation valve holding the vacuum in the system.


remove the hose.


and reinstall the core puller's head (sugest using a new core aswell)


open the valve, allowing the core to be inserted.


slide the core back down into the access valve and reinstalle it by screwing it back in.


then remove the entire core puller assembly, leaving the unit still under deep vacuum.

so do you think thats how its done??

[[486]]

sorry i cant get my pics up yet, i got a "vacation" from school for a couple of days

[Ssilencer]

I Just bought a valve core remover and would like to know just how i should use it.

Is this procedure correct?




then remove the entire core puller assembly, leaving the unit still under deep vacuum.

so do you think thats how its done??

I think you have to break the vacuum and leave the unit charged before removing the core remover, or once you put the charging hose some air will get inside the system.

BTW, how much did you pay for the core remover? and where did you get it?

[Xeon th MG Pony]

you can get them from ebay for about 45 USD or less if you're lucky.

[wdrzal]

The best ones I like have a 90 degree ball valve plus a extra port in front of the valve to hook up your micron gauge to,

you can get superheat/xucooling thermometers that measure the temp of the working fluid,plus a broken valve core extractor plus a schrader valve rethreader tool

[Exahertz]

plus a schrader valve rethreader tool

wow really? how do those work? its not like a tap, is it? i mean, it cant be good to get metal shavings inside the system. especily on the suction line. it must be expensive.

mines a 1/4 turn ball valve type, i just fixed a leaky core in my truck today. and i must say, this thing is awsome! well worth the $30 and highly recomended to all who do this line of work!

[wdrzal]

must be old truck


your rethreading,usually just straighting the top thread that got rolled over, if your carfull you will never use that tool,just mentioned it, pressure in side pushes any shavings out.

[Ssilencer]

you can get them from ebay for about 45 USD or less if you're lucky.

Oh yes thanks, I saw one on Ebay for about us35 plus shipping, but I live in Argentina...

[wdrzal]

like these one with extra port one without


http://www.yellowjacket.com/images/p...s/18971-75.jpg

[Xeon th MG Pony]

Thats the one I have I love it, extra port is very handy indeed! Serves me very well!

[Exahertz]

One other thing that should be pointed out is:

If you only remove the valve core and that’s it, you really defeat the purpose of lessening the restriction. There is a restriction in the hose its self. The valve core depressor, which is removable in most charging hoses.

Once the valve core and valve core depressor are removed, the flow between the vacuum pump to the schrader valve is completely un-restricted.

[Ssilencer]

If you want to go unrestricted use a 3/8 copper tube instead of a manifold.