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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About Us

QISHANR supplies compressor refrigeration oil, and industrial lubricants from Foshan, Guangdong for HVACR maintenance, OEM fill and repair channels.We make refrigeration lubricants for B2B buyers who need stable quality and repeat supply.

6000

tons

Production capacity

10+

years

History

28+

regions

Export Countries

Qishanr Refegrigeration lubricants series

Enterprise Culture

Our Enterprise Culture

"Enduring great hardships to pioneer a path where there was none before."

Pioneering Spirit

Since our establishment in 2016, we have embraced challenges in the HVACR industry, constantly exploring new formulations to meet global demands.

Quality Obsession

We believe that every drop of lubricant represents our reputation. We adhere to rigorous batch-testing to ensure consistent product performance.

Customer-Centricity

Regardless of order size, we treat every client with professionalism, providing technical support and tailored solutions from our core team.

The Qishanr Commitment

Integrity in Trade: We believe in mutual benefit and long-term collaboration. Honesty is the basis of every deal we sign across 108+ countries.
Professionalism: Our sales and technical teams are equipped with industry knowledge to assist in oil selection, retrofitting, and troubleshooting.
Innovation-Driven: Science and technology are our goals. We continuously refine our POE, PAG, and synthetic series to match the evolving needs of modern compressors.
Environmental Responsibility: We are committed to environmental protection by ensuring our materials meet strict safety and sustainability benchmarks.