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.

Brand Story of Qishanr Refrigeration Oil

Par Qishanr Lubricants September 5th, 2025 22 vues

Industry Background

The stability of refrigeration systems relies on compressors. However, the quality of refrigeration oils on the market varies greatly, making it difficult for users to select appropriate products and resulting in a low qualification rate of oil samples. This leads to issues with the unit system and significantly high maintenance costs.

Company & Product Overview

Founded in 2013, Guangzhou Qishanr Technologies Co., Ltd. has developed a full-scenario product line with domestic base oils that meet the GB/T 17411 standard as the core, and optimized additive formulas:

Commercial refrigeration series includes POE-32 oil suitable for scroll compressors in shopping malls (viscosity index ≥160, compatible with R410A/R32).
Industrial refrigeration seriesfeatures VG68 long-life oil for centrifugal units (oil change interval of 8,000 hours), which meets the needs of low-temperature chemical reactions.
Cold chain logistics seriesoffers high anti-wear oil for screw units (Fe element contamination controlled at ≤40ppm).
Special scenario seriesincludes electric compressor oil for vehicles (with an annual growth rate of 45%).

Product Performance & Recognition

All product series have a pour point of ≤-50℃ and have passed the 1,000-hour bench test. After application, the failure rate of the unit system has decreased by over 60%, and annual maintenance costs have been reduced by 40%. These products have been recognized by major manufacturers, providing a comprehensive solution to refrigeration oil challenges in the industry.