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.

Fusheng FS120R Refrigeration Oil : Comprehensive Analysis for Screw Compressor Adaptation and Selection

By Qishanr Lubricants January 8th, 2026 60 views

I. Adaptation Scope: Precise Matching for Multiple Scenarios

Adaptation Category	Specific Content
Adaptable Models	Fusheng CSR/CSRN and other series of screw compressors
Adaptable Refrigerants	R134a, R404A and other commonly used refrigerants
Applicable Scenarios	Central air conditioning in commercial buildings, industrial water-source heat pumps, low-temperature refrigeration equipment for cold chain logistics
Working Condition Tolerance	Severe working conditions of -50℃, ready for use without additional debugging
Industry Adaptation	Plastics, electronics, pharmaceuticals and other industries

II. Core Performance: Stable Guarantee for All Working Conditions

Low-temperature Performance: Pour point -32.8℃, maintains fluidity under severe cold conditions, avoiding startup jamming and dry friction.
High-temperature Stability: Flash point 251℃, no carbon deposition or coking under long-term high-temperature operation.

Lubrication and Sealing: Kinematic viscosity 127.7 mm²/s (40℃), forming a stable oil film.
Economic and Safety: Anti-emulsification, low volatility; 47kV withstand voltage ensures safety.

III. Quality Assurance: Long-lasting and Reliable

Advanced Technology: Two-stage hydrocracking technology, stable base oil structure.
Long-lasting Durability: Antioxidant capacity 6 times that of ordinary mineral oil, service life up to 6000 hours.
Compliant Indicators: Total acid value 0.04 mg KOH/g, moisture content 17 ppm, meeting industrial standards.
Equipment Protection: No corrosion to internal components, extending screw compressor service life and reducing operation and maintenance costs.

IV. Brand and Supply: Reliable Guarantee

Brand Strength: Fusheng has nearly 70 years of industrial manufacturing experience, original genuine products with traceable sources
Market Recognition: Adopted by well-known enterprises such as York and NIO, with good reputation
Supply Guarantee: Standard packaging of 20L/barrel, sufficient inventory, nationwide 48-hour express delivery