What type of refrigeration oil should I use for my screw compressor?

Screw compressors typically require POE (Polyol Ester) oils for HFC refrigerants like R134a and R407C, or mineral oils for HCFC systems like R22. The viscosity grade (usually ISO VG 32-68) depends on the compressor manufacturer's specifications. Brands like Bitzer recommend BSE series POE oils, while FUSHENG systems often use mineral oil formulations.

What is the difference between POE and mineral refrigeration oil?

POE (Polyol Ester) oils are synthetic lubricants designed for HFC refrigerants (R134a, R404A, R407C, R410A) and are hygroscopic, requiring careful moisture control. Mineral oils (MO) are petroleum-based, used with CFC and HCFC refrigerants (R22, R502), and are less expensive but incompatible with modern HFC systems. POE oils offer better thermal stability and miscibility with newer refrigerants.

How do I select the right refrigeration oil for a centrifugal chiller?

For centrifugal chillers, select oil based on the OEM specification (e.g., Trane OIL00037, York PureOil S), the refrigerant type (R123 low-pressure or R134a medium-pressure), and the required viscosity grade. Most modern centrifugal chillers use POE oils with ISO VG 32-68. Always verify compatibility with the chiller manufacturer's technical bulletin and ensure the oil meets the required pour point for your operating conditions.

What are Hydroflurocarbon Refrigerants?

Di Qishanr Refrigerant November 11th, 2022 31 visualizzazioni

What are Hydroflurocarbon Refrigerants?

Hydroflurocarbons, or HFCs, are a class of refrigerants that can trace it’s first uses and origins back to the 1980’s. HFC refrigerants contain Hydrogen, Fluorine, and Carbon. They are similar to their HCFC cousins except without the Chlorine. In today’s world, October 2017, HFC refrigerants are the most widely used refrigerant across the globe. They can be found in automotive, chillers, air-conditioners both commercial and residential, refrigerated transport, and much much more.

In recent years there has been a push to phase out HFC refrigerants. This push is not due to Chlorine but instead due to HFCs’ Global Warming Potential, or GWP. The GWP on HFCs are thousands of times higher than that of Carbon Dioxide. That means that each vent or leak of an HFC refrigerant into the atmosphere directly contribute to Global Warming. Again, as I write this article today, October 2017, there is not one specific new class of refrigerants that will take the torch away from HFCs. The war is between the newer HFO refrigerants or the tried and true Hydrocarbon or Unassigned refrigerants such as R-290 or R-744.