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Compressor Oil

Molish 3GS Compressor Oil

Molish 3GS is a high-quality compressor oil. It is formulated from mineral base oil combined with special additives. 3GS oil is a lubricant designed for refrigeration compressors using traditional refrigerants. These oils are highly stable and provide excellent thermal reduction properties on surfaces. 3GS compressor oil can potentially be used in any compressor system regardless of the evaporator or compressor temperature. It is ideally suited for low-temperature applications below -18°C, including domestic refrigeration, industrial cooling, and air conditioning systems. This type of oil is especially compatible with HCFC and CFC refrigerants such as R-22, R-502, and R-12. Additionally, GS series compressor oils perform exceptionally well with natural refrigerants like R-717, R-600, and R-290. Key Features of Molish 3GS Oil
  • High-quality compressor lubricant
  • Excellent chemical stability
  • Resistance to reactions with refrigerants
  • Prevents surface abrasion
  • Strong electrical insulation
  • Low drip point
  • Prevents sludge formation in piping systems
  • Prevents wax separation
  • Stable fluidity
  • Prevents valve sticking
Property Test Method Unit 3GS Value
Density @ 15°C ASTM D4052 kg/L ≈ 0.850 – 0.870
Flash Point (COC) ASTM D92 °C ≈ 178
Pour Point ASTM D97 °C ≈ -30 to -33
Kinematic Viscosity @ 40°C ASTM D445 cSt ≈ 30
Kinematic Viscosity @ 100°C ASTM D445 cSt ≈ 4.4
Floc Point ASHRAE 86 °C ≈ -58
Dielectric Strength ASTM D877 kV ≈ 37
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Molish 4GS Compressor Oil

Molish 4GS is a high-quality compressor oil. It is formulated using mineral base oil and special additives. 4GS oil is a lubricant designed for refrigeration compressors using traditional refrigerants. These oils are highly stable and provide excellent thermal reduction properties on surfaces. 4GS compressor oil can potentially be used in any compressor system regardless of evaporator or compressor temperature. It is ideally suited for low-temperature applications below -18°C, including domestic refrigeration, industrial cooling, and air conditioning systems. This type of oil is especially compatible with HCFC and CFC refrigerants such as R-22, R-502, and R-12.
Property Test Method Unit 4GS Value
Density @ 15°C ASTM D4052 kg/L ≈ 0.850–0.870
Flash Point (COC) ASTM D92 °C ≈ 184
Pour Point ASTM D97 °C ≈ -30 to -33
Kinematic Viscosity @ 40°C ASTM D445 cSt ≈ 55
Kinematic Viscosity @ 100°C ASTM D445 cSt ≈ 5.9
Floc Point ASHRAE 86 – °C ≈ -54 to -66
Dielectric Strength ASTM D877 kV ≈ 40
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Molish R-134 Compressor Oil

Advantages of Using Molish R-134 Oil
  • Compatible with R134a refrigerant: Specifically designed for optimal performance in compressors using R134a gas.
  • Suitable for various cooling systems: From household refrigerators to automotive air conditioners, this oil is a practical and cost-effective choice.
  • High resistance to heat and oxidation: Stable performance at elevated temperatures and prevents internal deposit formation.
  • Excellent chemical stability: Reduces wear and friction, extending compressor lifespan.
  • Strong lubricating ability: Provides effective protection for moving compressor parts under diverse environmental conditions.
Property Test Method Unit Molish R-134 Value
Density @ 15°C ASTM D4052 kg/L TBD (typ. 0.850–0.870)
Flash Point (COC) ASTM D92 °C TBD (typ. 230–260)
Pour Point ASTM D97 °C TBD (typ. -30 to -33)
Kinematic Viscosity @ 40°C ASTM D445 cSt TBD (68)
Kinematic Viscosity @ 100°C ASTM D445 cSt TBD
Acid Number (TAN) ASTM D974 mg KOH/g ≤ 0.03 (target)
Dielectric Strength ASTM D877 kV TBD (typ. ≥ 35)
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Molish Refrigeration Oil 68

Features and Applications of Refrigeration Oil 68 Refrigeration Oil 68 is a type of refrigeration or cooling compressor oil. This oil acts as a coolant, dissipating the heat generated during gas compression. It is a synthetic base oil compatible with ammonia refrigerant. Due to its suitable viscosity, it is used across a wide temperature range. The primary application of this oil is in industrial and commercial refrigeration systems for various types of open, semi-hermetic, and hermetic compressors. It can also be used in air conditioning and refrigeration systems to prevent wear, rust, and other issues. Among the features of Refrigeration Oil 68, one can mention its high resistance against all kinds of impacts and rust. Additionally, its effective lubrication in various industries and its durability and strength against oxidation and heat are among the prominent characteristics of this lubricant. Technical Specifications of Refrigeration Oil 68 This oil can be used in systems where oil separation is essential. The additives present in this industrial oil provide stability against heat and oxidation and prevent oil thickening inside the compressor. Therefore, to minimize oil thickness, improve performance, and increase equipment lifespan, use Molish refrigeration compressor oil.
Property Method Unit Typical Value
Viscosity @ 40°C ASTM D445 mm²/s ≈ 68
Viscosity @ 100°C ASTM D445 mm²/s ≈ 6.8 – 7.0
Density @ 15°C ASTM D1298 kg/m³ ≈ 850 – 870
Flash Point (COC) DIN ISO 2592 °C ≈ 210 – 220
Pour Point DIN ISO 3016 °C ≈ -30 / -33
Refrigeration Oil Group DIN 51503 – KAA, KC, KE
Neutralization Number (TAN) DIN/ASTM mgKOH/g < 0.04
Saponification Number DIN/ASTM mgKOH/g < 0.08
Refrigerant Stability DIN 5193 – ≥ 96
The lowest temperature at which the oil still flows is called the pour point. If the temperature drops below the permissible limit, the oil begins to solidify and loses its fluidity. In cold climate regions, the oil must have a low pour point. The lowest temperature at which the oil ignites when exposed to a flame source is called the flash point. The higher the flash point, the lower the fire hazard. Viscosity refers to the thickness of the oil; in other words, the fluid’s resistance to flow. Temperature, pressure, base oil type, and additives affect viscosity. For example, as temperature increases, viscosity decreases and the oil becomes thinner. Density refers to the weight or mass of the oil. For example, how heavy one liter of oil is.
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Molish Vacuum Oil

Roles of Oil in Vacuum Pumps Oil in vacuum pumps is used as a lubricant to reduce friction and wear of moving parts, and also for sealing and protecting the pump against moisture and other contaminants. The presence of oil also helps transfer heat from the pump, maintain vacuum, and prevent air leakage into the system. The type of oil used in a vacuum pump depends on the pump type and its application, but typically mineral oils and synthetic oils are used. Oil plays various roles in vacuum pumps, including: Acting as a filler for empty spaces and sealing system (to prevent air from entering the clearance between pump parts and to enable proper vacuum generation). Oil can be effective in creating suction close to absolute zero, since the vapor pressure of oil is much higher than that of water (provided that standard vacuum pump oil is used). It serves as a lubricant and prevents wear of different components (Molish oil has very high viscosity and adhesiveness, which completely coats the surface of the rotor and vanes in the vacuum pump and protects them from environmental factors).  
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