Description
Suniso / Bailars 4GS refrigeration oil is a high-quality mineral oil developed for refrigeration and air-conditioning compressors operating under demanding conditions.
With a higher viscosity (ISO 68) than 3GS oil, 4GS provides enhanced lubrication film strength, making it ideal for medium- and high-temperature systems where load and pressure are greater.
These oils are approved and recommended by many OEM compressor manufacturers for use in both hermetic and semi-hermetic compressors.
⚙️ Key Features & Benefits:
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✅ High Viscosity (ISO 68): Ensures strong oil film under heavy load conditions.
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✅ Excellent Lubricity: Reduces friction and wear on compressor parts.
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✅ Thermal & Oxidation Stability: Resists breakdown at high discharge temperatures.
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✅ Low Wax, Low Pour Point: Reliable flow and lubrication even at low temperatures.
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✅ High Dielectric Strength: Safe for hermetic and semi-hermetic systems.
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✅ Compatible with Common Refrigerants: Works with R-12, R-22, R-502, and natural refrigerants like R-717 (ammonia).
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✅ Extended Compressor Life: Reduces maintenance frequency and system downtime.
🏭 Applications:
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Commercial Refrigeration Systems – cold rooms, display cabinets, supermarket chillers
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Industrial Cooling Systems – process cooling, large chillers, ammonia systems
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HVAC & Air-Conditioning – central systems, rooftop units, large building chillers
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Compressor Types: Hermetic, semi-hermetic, reciprocating, scroll, and screw compressors
📋 Technical Specifications (Typical Values):
| Property | Typical Value | Test Method |
|---|---|---|
| Appearance | Clear, Light Amber | Visual |
| Viscosity @ 40 °C | 68 cSt (ISO 68) | ASTM D445 |
| Viscosity @ 100 °C | 6.6 cSt | ASTM D445 |
| Flash Point | 190 °C | ASTM D92 |
| Pour Point | –42 °C | ASTM D97 |
| Density @ 15 °C | 0.915 kg/L | ASTM D4052 |
| Dielectric Strength | 37 kV | ASTM D877 |
| Type | Mineral Oil (Naphthenic Base) | – |
🧾 Compatibility:
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Suitable Refrigerants: R-12, R-22, R-502, R-600a, R-717 (ammonia)
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Not for use with HFC refrigerants (use POE or synthetic oils for those systems).
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Compatible with copper, steel, and aluminum materials used in refrigeration systems.
🧰 Packaging Options:
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Available in 1 LTR & 1 GALLON Packing
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Factory-sealed containers ensure contamination-free storage and delivery.
🛡️ Storage & Handling Guidelines:
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Store in cool, dry areas away from direct sunlight.
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Keep containers tightly sealed to prevent moisture absorption.
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Avoid mixing with other oils unless proven compatible.
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Follow manufacturer recommendations for oil change intervals.
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