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.

Qishanr Refrigeration Oil--3GS & 4GS

От Qishanr Lubricants November 13th, 2025 15 просмотров

Core Positioning

Product Type: Regular MO-type refrigeration oil
Target Application: Commercial & residential refrigeration, air conditioning systems
Compatible Compressors: Reciprocating, scroll, screw types
Formula: Synthetic naphthenic refrigeration lubricant

Key Technical Parameters

Product	Kinematic Viscosity (40℃)	Kinematic Viscosity (100℃)	Density (20℃)	Pour Point
3GS	29cSt	4.2cSt	933kg/m³	-36℃
4GS	56cSt	6.1cSt	925.7kg/m³	-33℃

Key Performance Advantages

1. Wide Compatibility

Compatible Refrigerants: CFCs, HCFCs, R717, R600a, R290
Advantage: Adapts to equipment of different ages and specifications, reducing oil replacement frequency and costs.

2. Strong Operational Stability

Base Oil: Highly refined naphthenic oil
Features: Excellent chemical and thermal stability, maintains stable viscosity under alternating high and low temperatures.
Benefit: Avoids oil deterioration and sediment formation, ensuring clean compressor operation.

3. Outstanding Low-Temperature Performance

Pour point of 3GS (-36℃) and 4GS (-33℃) ensures good fluidity in low-temperature environments.
Benefit: Reduces startup resistance, guarantees normal startup and operation under extreme cold conditions.

4. Precise Load Adaptability

3GS (lower viscosity): Suitable for low-load equipment (home AC, small fridges), balancing lubrication and energy efficiency.
4GS (higher viscosity): Fits medium-load commercial units (supermarket freezers, catering refrigeration systems), supporting high-intensity operation.

Application Scenarios

Scenario Type	Specific Equipment
Residential & Commercial AC	Wall-mounted AC, central AC, multi-split systems
Small Refrigeration	Convenience store freezers, household fridges
Medium-Sized Units	Small supermarket refrigeration systems, office centralized cooling

Brand Guarantee

Company: Guangzhou Qishanr Technologies Co., Ltd. (specializes in mid-to-high-end refrigeration lubricants R&D, production, sales)
Support: Professional product selection technical support
Packaging: 200L drum, 20L pail, 4L×6 carton, 1L×10 carton

Qishanr 3GS/4GS combine professional parameters and practical design, providing reliable lubrication solutions for various refrigeration needs.