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.

Blogs de Qishanr Technologies

April 29th, 2026

Performance Analysis of BSE32 Refrigeration Oil Under Ultra-Low Temperature Conditions of -110°C

April 22nd, 2026

Lubrication Challenges in Low-Temperature Operation: A Technical Response with Emkarate RL32H Synthetic Oil

April 16th, 2026

Application Value of Solest 150 Synthetic Ester Refrigeration Oil in R134a Screw Compressors

April 9th, 2026

Suniso 3GS Refrigeration Oil Buying Guide: Avoid 3 Pitfalls to Extend Compressor Life by 5 Years

April 3rd, 2026

Trane OIL00015 Refrigeration Oil: Precisely Solve Core Maintenance Pain Points of Central Air Conditioning Screw Units

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Qishanr Lubricants

Performance Analysis of BSE32 Refrigeration Oil Under Ultra-Low Temperature Conditions of -110°C

Lubrication Challenges in Low-Temperature Operation: A Technical Response with Emkarate RL32H Synthetic Oil

Application Value of Solest 150 Synthetic Ester Refrigeration Oil in R134a Screw Compressors

Suniso 3GS Refrigeration Oil Buying Guide: Avoid 3 Pitfalls to Extend Compressor Life by 5 Years

Trane OIL00015 Refrigeration Oil: Precisely Solve Core Maintenance Pain Points of Central Air Conditioning Screw Units