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.

Daphne FVC32D Refrigeration Oil: A Preferred Choice for Polyether Refrigerant Compatibility

De Qishanr Lubricants February 4th, 2026 35 visualizações

I. Core Composition and Refrigerant Compatibility

FVC32D is formulated with highly refined polyvinyl ether (PVE) as the base oil, combined with special additives, and is designed specifically for HFC refrigerants such as R134A, R410A, and R407C. Its core advantage lies in superior miscibility with refrigerants, enabling smooth circulation with the refrigerant, completely solving the oil return problem, and avoiding reduced heat exchange efficiency caused by oil accumulation in pipelines.

II. Key Advantages for Complex Operating Conditions

Hydrolysis Resistance & Anti-clogging: The polyether synthetic oil formula prevents hydrolysis-induced sludge formation and capillary blockage, ensuring unobstructed system operation.
Effective Lubrication & Equipment Protection: Excellent lubricating performance reduces wear on compressor components, effectively extending equipment service life.
High Compatibility & Safety: It possesses outstanding electrical insulation, suitable for various hermetic compressors, eliminating leakage risks, and is highly compatible with mainstream brand compressors such as Hitachi, Daikin, and Copeland.

III. Application Scenarios and Specification Advantages

FVC32D is compatible with various compressors including reciprocating, centrifugal, scroll, and screw types, and is widely used in commercial air conditioners, low-temperature cold storage, and industrial refrigeration units. The small packaging specification is an optimal choice for maintenance, meeting the convenience of on-site refueling.

IV. Selection and Usage Notes

Parameter Matching: With an ISO VG32 viscosity grade, a pour point as low as -47.5℃, and a flash point of 178℃, it can adapt to low-temperature operating conditions and high-pressure exhaust requirements.
Usage Taboos: Do not mix with other oils; seal immediately after opening to prevent moisture absorption from affecting oil performance.

As a time-tested oil product in the market, Daphne FVC32D builds a solid protective barrier for refrigeration systems with its core performance, making it an indispensable choice for pursuing efficient and stable operation.