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.

The Technical Advantages of Trane Refrigeration Oil

By Qishanr Lubricants August 13th, 2025 90 views

Excellent lubrication performance
OIL00372 uses high-quality synthetic base oil and contains extreme pressure anti-wear agents, which can reduce component friction and prevent wear.
Good thermal stability and oxidation resistance
Due to the high-quality base oil and advanced additives, it is not prone to deterioration under high temperature and high pressure and can maintain stable lubrication for a long time.
Wide temperature range adaptation
OIL00372 has a high flash point and a low pour point, and can maintain good performance in both high and low temperature environments, ensuring the startup and operation of equipment.
Excellent cleaning ability
OIL00373 can remove system impurities and deposits, reduce energy loss, and improve efficiency.
Wide compatibility
It is compatible with various compressor components, materials, and environmentally friendly refrigerants, and is suitable for various refrigeration equipment such as screw type and centrifugal type.
Energy saving and cost reduction
By providing efficient lubrication, it reduces the load of the compressor, optimizes the state of the refrigerant, and reduces energy consumption and operating costs.