Mixture and composition of refrigerants in Lcd Freeze Separator Machine

[kkara]

Hello. I've got a freeze separator machine for separating cell phone lcd screens. There was leakage on the filter and the refrigerant had to be evacuated in order to weld the leaking joint. Prior to evacuating, we ran the refrigerant through an analyzer and got the following outcome: R12 - 57.5% R134 - 30.7% R22 - 0% HC - 11.7%. We tried evacuating the system with a vacuum pump then started to charge the system but it doesn't go above minus 40 degrees celsius. Is it possible that the analyzer incorrectly identified the refrigerants and we are using the wrong mix of refrigerants and if so what is the correct mix in order to be able to go down to minus 150 degrees celsius?

[kkara]

Hello. I've got a freeze separator machine for separating cell phone lcd screens. There was leakage on the filter and the refrigerant had to be evacuated in order to weld the leaking joint. Prior to evacuating, we ran the refrigerant through an analyzer and got the following outcome: R12 - 57.5% R134 - 30.7% R22 - 0% HC - 11.7%. We tried evacuating the system with a vacuum pump then started to charge the system but it doesn't go above minus 40 degrees celsius. Is it possible that the analyzer incorrectly identified the refrigerants and we are using the wrong mix of refrigerants and if so what is the correct mix in order to be able to go down to minus 150 degrees celsius?

[BBeerme]

What does the nomenclature plate say?

What refrigerant did you use for HC?

Hello. I've got a freeze separator machine for separating cell phone lcd screens. There was leakage on the filter and the refrigerant had to be evacuated in order to weld the leaking joint. Prior to evacuating, we ran the refrigerant through an analyzer and got the following outcome: R12 - 57.5% R134 - 30.7% R22 - 0% HC - 11.7%. We tried evacuating the system with a vacuum pump then started to charge the system but it doesn't go above minus 40 degrees celsius. Is it possible that the analyzer incorrectly identified the refrigerants and we are using the wrong mix of refrigerants and if so what is the correct mix in order to be able to go down to minus 150 degrees celsius?

[BBeerme]

Check it out guys. R-12 is still in use. We're being bent over a barrel and shafted so a couple of corporations can stay in business. Jeez.

[pecmsg]

What refrigerant does the ID tag state?

[VTP99]

.Works up down or on it's side.

[tunaguy]

Specialized ultra low temp equipment sometimes uses special refrigerant. One of our OEMs for example uses a priority blend that simulates a three stage Cascade system. They send it use in a propane tank and we have no idea what's in it. Penthane, 170, ???. It's matched to the components. Can you can get it from the OEM? Sorry I didn't read the long thread.

[kkara]

Unfortunately there is nothing stated on the tag. I tried getting in touch with the manufacturer in China but they did not provide information. They simply stated that it is a special blend and only they can mix it.

[BBeerme]

You're probably thinking of Polycold. There's actually five different refrigerants, one of which is argon.

Specialized ultra low temp equipment sometimes uses special refrigerant. One of our OEMs for example uses a priority blend that simulates a three stage Cascade system. They send it use in a propane tank and we have no idea what's in it. Penthane, 170, ???. It's matched to the components. Can you can get it from the OEM? Sorry I didn't read the long thread.

[HVAC_Marc]

Have them mix it and ship it.

One of the hazards of buying China made stuff. Not that it's bad, but their views on equipment support is different from the USA/Canada.

[kkara]

You can say that again. I now have a $ brick and only because of the refrigerant!

[HVAC_Marc]

not that i condone experimentation, but r-12 is still around, as is 134a, and HC might mean propane...err...r290

[tunaguy]

I was not thinking of any blend in particular. Different OEMs use their own priority blends based upon their models. If this is a single stage and he wants it below -40 then you will you have to use the OEM special juice which will separate in multiple phases of the refrigeration circuit, engineered to match the comp, load, capillary, etc. Anything else will be a shortcoming. These small application ultra low temp units are not forgiving at all. Refrigerant analyzer will not work here.

[HVAC_Marc]

Refrigerant analyzer will not work here.

It might if it wasnt made in China

The problem is that it's a critical charge where a fraction over or under of any one part causes a huge hassle.

[kkara]

Actually I have been thinking the same thing. I had planned on going out to search fro R12 and R290 or R600. R12 is difficult to get at our end because it is banned. I am trying to see if I might be able to get some R12 that might be lying around at one of the local refrigeration technicians shops. That leaves me with R290 which I highly doubt will be available but I will certainly try. My goal is to create a mix of the gases in a separate cylinder based on the data that I obtained from the analyzer. The only thing that I will have to do by trial and error is the amount of charge as I don't know the required quantity. I will charge 25 grams at a time and go at it very slowly. All this is assuming that I am able to get the required refrigerants.

[HVAC_Marc]

It's all over ebay...r12 and "official" r290

[kkara]

Used R600 for the HC. Created an exact mix using a refrigerant scale but it didn't work. Lowest I was able to achieve was -152 celsius.

[kkara]

Getting the refrigerant from the oem is the only option left. Getting a chemical import permit is a big challenge in my country.

[kkara]

You're right. Both R12 and R290 are readily available on Ebay but getting them to my country is difficult both in terms of shipping and local government regulations. R12 is banned in my country.
I was able to get a hold of a small quantity from a refrigeration tech. I mixed the R12, R134 according to the refrigerant analyzer. For the HC I used R600 but unfortunately it didn't work.

[HVAC_Marc]

What is your country?