Repairing Scroll Compressors

I need advice on how to repair scroll compressors. I have two that seized after the outer casing ruptured and the oil wasted away.

Replace is about the only option. The internal parts, for any brand that I am aware of are not serviceable... this is due to the extreme close tolerances that are required for the scroll to work. What size and brand compressor? Is price that much of an issue? How much cheaper do you think it is going to be to rebuild a scroll, if possible, than cleaning up your system and installing a new compressor?

Get a hold of the manufacturer. If your pumps were designed to have the sealing surfaces replaced they will have the parts. I question the oil leaking out part of your statement. Scroll pumps are "dry" internally. Perhaps it was this oil that caused a hydraulic blow out when it could not be compressed. If that is true it is unlikely that the pump can be rebuilt. Scroll pumps require more cleanliness/less contaminants than other types of compression pumps. They do not require oil or any lubricant in the pumping section.

Hermetically sealed (welded shut) compressors are not considered serviceable, by the nature of their manufacturing process. Your larger concern is that you are rupturing the compressor shell. Either you have had two defectively welded units (doubtful) or you are exceeding the maximum design pressure of the shell. This implies that you either have a sudden and violent increase in either return line (suction line) vapour pressure, or possibly a completely flooded system with liquid refrigerant, that on start up causes a rapid increase in pressure as the refrigerant changes state.

Are there any safety devices upstream of the compressor such as, a suction accumulator, crank case pressure regulating valve, etc? What is the process application, refrigerant used, equipment indoor or outdoor, ambient conditions, etc.