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.

Danfoss Refrigeration Oil: Solve 3 Key Refrigeration Pain Points

Oleh Qishanr Lubricants November 10th, 2025 pandangan 44

Solve model compatibility confusion: Danfoss offers a full range of models including 160P, 160SZ, and 175PZ, precisely matching MTZ, SZ, SY series compressors and compatible with mainstream refrigerants (R22, R404A, R134a). No repeated compatibility checks needed. With excellent low-temperature fluidity (pour point as low as -45℃) and high flash point (over 200℃), it easily handles extreme working conditions, avoiding cold-start jams and high-temperature safety hazards.
Reduce equipment wear & cut energy consumption: Danfoss' POE ester formula delivers superior lubricity, minimizing internal compressor friction and extending service life. Combined with its transmission technology, it can lower energy consumption by 10%-25%.
Simplify oil return & replenishment for long pipelines: Clear guidelines suggest adding 1%-2% of the refrigerant weight. The oil sight glass enables real-time level monitoring, preventing damage from oil shortage.
Cost-saving upgrades & flexible capacity options: The upgraded 175PZ is backward compatible with 160PZ—older equipment can be upgraded without modifications. 2.5L and 5L capacities meet diverse equipment needs, reducing frequent refills.

Choose Danfoss refrigeration oil to comprehensively solve application pain points from compatibility and lubrication to energy consumption, keeping your refrigeration equipment running efficiently and durably!