2026-04-15Views：
The core difference between oil jet compressor and oil-free compressor
in the field of industrial compressed air, there are significant differences between oil jet compressors and oil-free compressors in terms of lubrication, compressed air quality, maintenance costs and applicable scenarios due to differences in design principles. Granklin water-lubricated screw air compressor, as a representative of oil-free machine, provides efficient solutions for enterprises with strict requirements on air quality through technological innovation. The following is an analysis of the core differences between the two:
oil injector compressor
lubricating oil is used as cooling and sealing medium, and oil and air are in direct contact during compression. The lubricating oil circulates through the oil circuit system to lubricate the screws, bearings and other components, while absorbing the heat generated by compression.
Oil-free compressor (Granklin as an example)
water-lubricated single screw and star wheel structure are used to replace traditional lubricating oil with water. The water medium flows through the circulation system to realize the lubrication, cooling and sealing functions of the screw and the star wheel, and no oil participates in the compression process.
oil injector compressor
the output air may contain trace amounts of lubricating oil and oil decomposition products, which need to be reduced by post-processing equipment such as oil-water separators and precision filters, but it is still difficult to completely eliminate the risk of pollution.
Oil-free compressor (Grantkering)
from the source to prevent oil into the compressed air, the output gas without oil pollution. With dryers and high-efficiency filters, it can further control humidity, particulate matter and microbial content, perfect for pharmaceutical, food, electronics and other industries that require extremely high air cleanliness.
oil injector compressor
it is necessary to regularly replace the lubricating oil, clean the oil system, and deal with the problem of oil separation. Consumables such as oil filter and oil core are frequently replaced, and additional maintenance costs are easily incurred during long-term use.
Oil-free compressor (Grantkering)
due to the design of the oil-free system, the oil filter replacement, oil circuit maintenance and other links are eliminated, which significantly reduces the maintenance frequency and the cost of consumables. The water lubrication medium can be recycled, and only a small amount of water needs to be added regularly, further simplifying the maintenance process.
oil injector compressor
lubricating oil may cause performance degradation due to high temperature oxidation or impurity pollution. Long-term use is easy to form carbon deposits and sludge inside the equipment, affecting the life of components.
Oil-free compressor (Grantkering)
water lubrication technology reduces equipment wear through uniform cooling and sealing. The single screw and star wheel structure runs smoothly, the vibration and noise are low, and the life of the core components is significantly extended.
| Dimension | oil injector compressor | oil-free compressor (Grantkering) |
|---|---|---|
| core Requirements | conventional industrial air supply, low air quality requirements | scenarios with strict requirements for oil-free and clean gas supply, such as pharmaceuticals, food, electronics, etc. |
| Energy efficiency performance | stable efficiency under medium and low load, high load needs to strengthen heat dissipation | water lubrication technology to improve compression efficiency, full load range energy efficiency |
| initial Investment | lower | higher (due to technical complexity and material costs) |
| full life cycle cost | higher fuel consumption and maintenance costs | low maintenance costs, long-term use of outstanding cost-effective |
Summary
there are significant differences between oil jet compressor and oil-free compressor in lubrication mode, air quality and maintenance cost. Granklin water lubricated screw air compressor through oil-free design, efficient and stable operation and low maintenance characteristics, for the air quality has strict requirements of the enterprise to provide reliable, economical compressed air solutions, help the production process in line with industry standards, to ensure product quality and safety.
(Note: The content described in this article is based on the general principles of compressed air equipment and the design characteristics of Granklin products, and does not involve specific performance indicators or comparison of third-party equipment.)
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