Refrigerant RX4

[Radiohead]

Hi all,
just thought i`d try and see if anyone could help,
have been lookin at a low temp freezer cabinet
holding at -40c, marked as running on refrigerant "RX4"
prob a trade name but no luck so far in tracking it.
compressor is a hermitic marked for R507 on ester, system is on capillary line.
Any thoughts would be welcome

[Chunk]

Hi Radiohead.

I remember rx4 from about 14 years ago.We retrofitted a -80 test chamber for developing diesel engines that had been running on r13b1.

Rx4 was a trade name and if i remember right,it was just as dangerous as the gas it was replacing and has also probably been phased out.

As you said,there is no data to be found on the internet and the engineer i did the retrofit with died so i cant ask him.

[cryotech]

You can try MO89 is replacement for 13B1
I have seen this in a freeze drier in the states made by Virtis, system running -65c single stage system with cap tube

refrigerants.dupont.com/Suva/en_US/pdf/k10940.pdf

[Radiohead]

Thanks for the help guys,
did a little more diggin and found this stuff
RX4 is aslo known as Isceon 89, according to
Isceon Rhodia Refrigerants spec Sheet isceon 89 is a zero ODP replacement for R13B1, can run in ester or mineral oils the only thing it doesn`t run is for president!!!

[The Viking]

这是新加的空白文章1，可以在UBB可视化编辑器中，添加和修改文章内容。

"New adding blank composition 1 这 right new adding blank composition 1, yes from here in the resident in UBB yes 视 conversion 编 辑 vessel, addition harmony learning/repairing reforming composition contents."

???????

Something must have been lost in the translation

[Brian_UK]

Hi Viking, got your reported post, thanks.

I did a Google search on the characters posted and found the same on numerous boards/forums with the poster banned.

Best to ignore it and wait for a Mod to delete them.