r290 replacement for r134?

[chadng]

can i replace my r134 refrigerant to r290? if not what refrigerants are interchangeable with r290.

[NoNickName]

The refrigerant mass flow for R134a is higher than for R290. And POE oil is not completely miscible with propane... I would not suggest so.
I would stick to R134a, despite I understand it being difficult to source in your country.

[lynark]

can i replace my r134 refrigerant to r290? if not what refrigerants are interchangeable with r290.

Why do you want to replace R134 with R290 in the 1st place? and what is your application?

[ctscasemod]

I use r290 as a direct replacement for R134 in my car AC. The oil is SW100, intented for R134.
You must change the TXV or cappilar as flow is differnt and if only using R290 charge about 10% in weight of R134.
The stuff is really cold, and it uses a lot less of power for the compressor (I changed because R134 would turn to much load on my engine on really hot days) I stick to propane only because 120g will do the job, that's enought to blow anything in case of any leakage or accident

If on a stationary aplication you may be better of using a mix of 40% r600 and 60% r290. This is a direct replacement, used on R12 ans it works with R134 too. I've tried with both oils and don't have any compressor damaged in about two years. Mostly for fridges.

[ctscasemod]

I use r290 as a direct replacement for R134 in my car AC. The oil is SW100, intented for R134.
You must change the TXV or cappilar as flow is differnt and if only using R290 charge about 10% in weight of R134.
The stuff is really cold, and it uses a lot less of power for the compressor (I changed because R134 would turn to much load on my engine on really hot days) I stick to propane only because 120g will do the job, that's enought to blow anything in case of any leakage or accident

If on a stationary aplication you may be better of using a mix of 40% r600 and 60% r290. This is a direct replacement, used on R12 ans it works with R134 too. I've tried with both oils and don't have any compressor damaged in about two years. Mostly for fridges.

By the way, If charging the 60-40mix charge about half the weight of R134 as this refrigerants are lighter (1Kg R134~0.5l)