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View Full Version : R-404 and R507 are out of the game







chemi-cool
15-04-2017, 05:22 PM
It will be a matter of maybe a few years but prices are already soaring.

Any suggestion of replacement for low temp or should I invest in a big stock?

monkey spanners
15-04-2017, 09:24 PM
I've been using R407F but not tried it in a freezer. Have also ordered a load of R404A for stock as the price just went up 30% here. Crazy times.

thebrockenshire
16-04-2017, 04:05 AM
I have been seeing a bit of R290 Propane getting around, its a really good refrigerant.
I haven't done it myself yet but another company in town has been using R290 with R404A comp and TXV.

cadwaladr
16-04-2017, 05:22 AM
Retrofitting 404a to r290? Propane what issues does that present glad I am on the guidelines now it's sounds like danger to me!

monkey spanners
16-04-2017, 03:48 PM
Think R448A is being pushed for low temp systems, not tried it.

cricri
16-04-2017, 04:27 PM
R448A should be OK for replacements but only in DX systems, glide is around 6/7K. Nothing yet for flooded or pumped systems, and probably nothing definitively.

thebrockenshire
16-04-2017, 11:23 PM
Retrofitting 404a to r290? Propane what issues does that present glad I am on the guidelines now it's sounds like danger to me!

R290 poses no risk while it is inside the system due to the UEL being only 10%, although open contacts in close proximity being a real danger if leaks are present.

cadwaladr
17-04-2017, 01:05 AM
Not for transport refrigeration that's for certain,get the drawing board out I would not put it into a reefer unless if was based close to a fire station!