Since Trinary safety switches monitor the high pressure branch, using it in the low pressure branch would be useless. The cut on/off presets for the safety switch would not apply to the low side pressure to protect the system from a potential problem. I would find a beadlock fitting that has the saf...

If the HC refrigerant is comparable to R134A, the mineral oil will not mix. the mineral oil is not soluble in R134a and will gum up. But there is very little information on these replacement refrigerants since they are recognized as a replacement for R12. These refrigerants are neither R-12 or R134a...