**r508a**r23**

[100]

Which would be better in a system with a LBP 7/16HP R404A compressor?

Both have incredible pressures (what I am aware of), and need Polyol Ester Oil instead of AB/Min.

What implications does this have on a R404A compressor?

I'm thinking I could ignore the need for PE oil and just use standard AB that is already in my comp:D

[HawainPanda]

u can't use oil that's not compatible with that specific gas u want to use, u have to use poly easter oil if u want to use r508a or r23, also, most compressors can withstand alot of compressor, so using an r404a compressor should be fine

[JSU]

you can run r23a in a r404 comressor???? Without cascade????

[100]

I have thought about designing a thermoelectric condensor cooler, that replaces the need for cascades. :slobber: . I think it would work if big 300W TEC was used in conjunction with a big pot of saline gel in which the condensor was sat, but that's just an impractical dream for now :p:

I am referring to R23, not R23A.

"R508A and R23A are high pressure HFC refrigerants for ultra-low temperature systems. Suitable for chemical flash-freezing, not suitable for transport refrigeration systems nor domestic AC systems. Low quantities in production, no assigned colour code."

That's what A-Gas UK have to say about these. I was really hoping to get either gas working :( but I really can't devote the time to oil-pumping :(

[JSU]

I know that... r23 has a bp of -82c and is normaly used in cascade systems. I was unaware it could be used ina regular single stage unit. btw I have a 1/4hp r22 compressor think I could use this stuff???

[100]

Hey JSU :)

>I was unaware it could be used ina regular single stage unit.
No-one has answered this question yet :)

>btw I have a 1/4hp r22 compressor think I could use this stuff???

You're speaking to others ^^ but I'll blabber anyway, If R22 uses POE oil (I should know off my head, but I haven't been on this game for very long), you can most likely use it.

Critical pressure in the condensors is going to be the limiting factor? (forgive my ignorance :))

[JSU]

I know about the oil probelm..... I though that r23 need -30c~ in the condensor areas to turn into a liquid....

[Pandrone]

R23 or R508b won't workl in a regular single stage ,it won't condense... (Just to make things clear) Btw, it may condense into liquid but at a very high pressure.

[bh2k]

yea, those need cascade heat exchangers to be able to get low enough to be condensed into a liquid. The pressure for one compressor may be too much for it to handel. You don't want to make your single stage a bomb now do you?

[chilly1]

Actually R23 needs Polyolester oil while r508 will work with mineral, alkylbenzene or polyolester.

[bh2k]

but does it really matter if a single stage can't condense it?

[100]

OK, Thanks very much. Wont be using R23 then ^^

[Redwolf]

Ahh come on 100.. Dont like to see oil floging up the cap tube? :)

POE has only down sides imo.

[100]

POE has one upside for me... it is cheeeap as chips from my gas distributor.
Cheaper than min and ab anyway. What do you find the matter with poe?! (maybe you're just mad... but i am humbly inexperienced :D)

[Redwolf]

To name a few..
-Doesn't like to be overheated. Overheating can flog the metering device and evap with sludge
-Loves H2O
-Doesn't mix well with other oils. Not that I'm a fan of mixing oils.. but its a different world in the field on poorly maintaind systems.

If it was up to me.. we'd stick with AB 200TD. And use blends with 5% 600a or 290.

[100]

I see... Thanks for the advice Redwolf!