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.

R417A Refrigerant Gas 11.3KG (25LBS),HFC Refrigerants

Description

Introduction:

R-417A refrigerant is a hydrofluorocarbon (HFC) retrofit alternative for R-22 in direct expansion (DX) stationary air conditioning (AC) and medium-temperature commercial refrigeration systems. Because Freon 417A is compatible with mineral (MO), alkylbenzene (AB), and polyolester (POE) oils—most retrofits do not require a lubricant change. Therefore, retrofitting DX stationary AC and medium-temperature commercial refrigeration systems from R-22 takes considerably less time and investment.

Specification:

Name	1,1,1,2,2-Pentafluoroethane R125 46,6% (w), 1,1,1,2-Tetrafluoroethane R134a 50% (w), Butane R600
Model	R417A, HFC-417A, R-417A,Freon-417A
Classification	Hydroflourocarbon Refrigerant Blend
Formula	C2HF5,C4H10,CF3CH2F
Cas No.	R125: 354-33-6, R134a: 811-97-2, R600: 106-97-8
Replacement for	HCFC R-22 Freon

Application:

Applications for R-417A include residential and commercial AC systems and medium-temperature refrigeration units, like food service, storage and processing, and supermarket cases.