Can oil be used in oil-free air compressors?

Specifications for the use of oil-free air compressors

As an oil-free compression equipment, Granklin water-lubricated single-screw air compressor, its design principles and structural characteristics clearly prohibit the use of lubricating oil. The specific technical basis and usage specifications are as follows:

1. Structural design characteristics

1. Lubricating medium: Water is used instead of traditional lubricating oil, and the contact surface lubrication between the single screw and the star wheel is realized through a precisely controlled water film.
2. Sealing system: The specially designed sealing structure ensures that the water medium circulates in the compression chamber to prevent the entry of external substances.
3. Material compatibility: Key components (screws, star discs, bearings) are made of water-resistant corrosion materials and are chemically incompatible with the oil medium.

2. Risks of using oil

1. Lubrication failure: The viscosity of oil is significantly different from that of water, and an effective lubricating film cannot be formed between the single screw and the star wheel plate, which may lead to metal contact wear.
2. Seal damage: The oil medium will destroy the balance of the original water seal system, causing leakage of compressed gas or intrusion of external pollutants.
3. Compressed air pollution: Oil residues will be directly mixed into compressed air, which will violate the original intention of oil-free design and affect gas standards in food, medicine, electronics manufacturing and other industries.
4. Component damage: Mixing oil and water may form emulsions, block precision filter units, accelerate filter element aging and seal deformation.

3. Standardize operating requirements

1. It is strictly prohibited to add any type of lubricating oil, grease or other oily media.
2. When replenishing media, softened water or deionized water that meets water quality standards must be used.
3. If oil is found to have entered the system during maintenance, it is necessary to stop the machine immediately and perform the following operations:
   • Thoroughly drain residual liquid in the compression chamber
   • Remove and clean screw, star wheel plate and seal assembly
   • Replace contaminated water filtration units
   • The system can be restarted after a professional has checked for tightness

4. Technical alternatives
Granklin air compressors operate efficiently by optimizing the water lubrication system without the need for additional oil media. Its core technical advantages include:

• The efficiency of water film lubrication is increased by more than 30% compared with oil lubrication
• The temperature during the compression process is stable within the range of 40-60℃ to avoid media degradation caused by high temperatures
• Eliminate oil systems and reduce routine maintenance workload by 80%

Conclusion: Lubricating oil is strictly prohibited in oil-free air compressors. Granklin’s water-lubricated single screw equipment has been designed to achieve oil-free operation. The use of oil media will destroy the system balance, resulting in equipment damage and compressed air pollution. Users should strictly follow operating specifications to ensure that the equipment operates under the specified media to maintain the best performance and air source quality.