Dunham-Bush Refrigeration Oil is a specialised refrigeration and air conditioning compressor lubricant for systems using HFC refrigerants. This oil provides effective anti-wear protection for metal surfaces, thereby increasing system life and improving efficiency. It is suitable for both initial and maintenance charging. Due to its low temperature characteristics and excellent chemical and thermal stability, Dunham-Bush refrigeration oils can be used over a wide range of operating temperatures.
Case Details
System Compatibility
Suitable for steel, aluminium and other metal surfaces, reducing compressor wear.
Supporting initial filling and post-maintenance replenishment to extend equipment life.
Energy Efficiency and Environmental Protection
Low volatility design reduces oil consumption and improves system energy efficiency.
Complying with environmental certification and is suitable for green refrigerants (e.g. R32).
Application Areas
Commercial refrigeration: Cold storage, food processing plants, hotel central air conditioning.
Industrial equipment: Compressor units for chemical cooling, energy extraction equipment.
Common Models
DBOIL - 2
Kinematic Viscosity (40°C):30-50 cSt
Pour Point: ≤ -50°C
Flash Point:≥ 180°C
Refrigerants:R-134a, R-404A, R-407C, R-410A.
Features:
Excellent low temperature performance
Low pour point (typically below -50°C) ensures fluidity at very low temperatures.
High viscosity index
Small change of viscosity with temperature, stable lubrication performance in a wide temperature range.
Application scenarios:
Commercial refrigeration: supermarket display cabinets, cold storage compressors.
Air-conditioning systems: central air-conditioning (especially inverter units using R-410A).
Transport refrigeration: refrigerated trucks, marine refrigeration equipment.
DBOIL - 7
Kinematic Viscosity (40°C):68-100 mm²/s
Pour Point: ≤ -50°C
Flash Point: ≥ 250℃
Refrigerant:R134a
Features:
Excellent chemical stability
Compatible with HFC refrigerants (e.g. R134a), not easy to produce sludge or acid.
Good low temperature fluidity
Low pour point (usually ≤ -50°C) ensures effective lubrication even at low temperatures.
Low hygroscopicity
Ester oils still have a certain degree of hygroscopicity, and need to strictly control the system of moisture (<100ppm).
Application scenarios:
Commercial refrigeration: supermarket freezers, cold storage screw compressors.
Air-conditioning systems: central air-conditioning (screw units with R134a).
DBOIL - 15
Kinematic Viscosity (40°C):80-90 cSt
Pour Point: ≤ -50°C
Flash Point: ≥ 250℃
Application scenarios:
Industrial refrigeration: Screw compressors for large cold rooms, chemical process cooling units.
Commercial air-conditioning systems: central air-conditioning chiller units, modular refrigeration systems, heat pump units.
Refrigerants:R134a ,R404A ,R407C ,R410A.
Features:
Excellent thermal stability
Stable at exhaust temperatures up to 150°C.
Reduces oil decomposition and carbonisation at high temperatures.
Excellent material compatibility
Compatible with elastomeric sealing materials commonly used in systems (e.g. HNBR, EPDM).
Will not cause corrosion of metal parts.
Environmentally Friendly
Free of chlorine, heavy metals and other harmful substances.
DBOIL - 7
