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.

Bitzer 170 Refrigeration Oil

Di Qishanr Lubricants December 25th, 2025 27 visualizzazioni

I. Precise Compatibility: Customized for a Solid System Foundation

As a POE (polyol ester) synthetic oil, it perfectly matches all Bitzer screw compressor units and is compatible with mainstream environmentally friendly refrigerants such as R134a, fundamentally avoiding compatibility failures and building a solid system protection.

II. Excellent Performance: Stable Operation and Reduced Maintenance Costs

Flash point 290℃, pour point -25℃, stable and smooth under extreme working conditions， low moisture content + excellent lubrication and sealing performance, reducing component wear, extending compressor service life and lowering maintenance costs.

III. Environmental Compliance: Adaptable Globally, Removing Export Barriers

Compliant with EU CE certification, compatible with low-GWP environmentally friendly refrigerants， metal packaging preserves freshness, ensures stable quality, and helps foreign trade enterprises export smoothly.

Choose the right Bitzer 170, which safeguards the refrigeration system with precise compatibility, stable performance and environmental compliance.