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.

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Qishanr Technologies Makes Debut at Shijiazhuang HPE Heat Pump Exhibition, QISHANR Refrigeration Oil Attracts Global Attention

Oct 16th,2025 35 Puntos de vista

In March 2025, Guangzhou Qishanr Technologies Co., Ltd. officially launched its global refrigeration lubrication market layout by showcasing the self-owned QISHANR refrigeration oil series at the 2025 HPE China Heat Pump Exhibition (Shijiazhuang). The exhibition gathered clients from Europe, Southeast Asia, the Middle East, and other regions, with QISHANR products quickly becoming a highlight due to their wide scenario adaptability—marking the brand’s first solid step toward globalization.

Three Featured Products Steal the Spotlight

Tailored to diverse refrigeration needs, three products stood out with their professional parameters:

QSL-AB32 (Alkylbenzene Type): With 32.2 cSt kinematic viscosity at 40℃ and -50℃ pour point, it is compatible with CFCs, HCFCs, R17, and R600a refrigerants, ideal for reciprocating, screw, and rotary compressors in commercial and industrial refrigeration.
QSL-PAG46 (Polyalkylene Glycol Type): Boasting 44.5 cSt viscosity at 40℃ and -52℃ pour point, it excels in thermal and shear stability, fitting HFCs, HFOs, and CO₂ systems, especially for immersed screw compressors.
QSD-22H (POE Type): Featuring 20.7 cSt viscosity at 40℃ and -52℃ pour point, it is designed for industrial split systems, compatible with HFCs, HCFCs, CFCs, and HCs, suitable for multiple compressor types.

Global Services Lay Foundation for Expansion

Backed by independent ester-based base oil technology, all QISHANR products passed strict thermal and chemical stability tests. The company also offered one-stop support: OEM/ODM customization and lubrication selection guidance for compressors. By the end of the exhibition, feedback from 12 countries was collected, providing clear directions for subsequent global market expansion.