1. Selection of base oil
Base oil accounts for a relatively high proportion in compressor oil, so the selection of base oil is related to the fundamental quality of compressor oil. So the base oil we are talking about will contain two meanings, one is what type to choose, and the other is what performance is required.
2. Appropriate viscosity
There are three common viscosity grades of screw air compressor oil: 32, 46, and 68. As we all know, under the condition of dynamic viscosity, the thickness of the oil film increases with the increase of oil viscosity, but the friction will also increase. The lubrication protection brought by the oil film thickness and the increase in compressor power consumption and oil consumption caused by the increase in friction have become the contradictions in the lubrication of screw air compressors.
How to achieve the dual effects of lubrication protection and equipment energy consumption is the endless pursuit of air compressor oil technical experts.
3. Anti-corrosion and anti-rust performance
The oil cooling components in the compressor are mostly copper parts or copper alloys, which are easily corroded and rusted, especially when the moisture content in the air is high, which will catalyze the corrosion and rust reaction to accelerate. Therefore, the compressor oil must have good corrosion resistance.
4. Demulsification and defoaming performance
Since it is a device that compresses air, contact with air will inevitably lead to two problems. One is that the condensed water in the air caused by compression causes the compressor oil to emulsify, thereby losing its lubricating properties; the other is that the mixing of air brings about an increase in bubbles in the oil, causing a decrease in lubricity and the generation of compressor cavitation. Therefore, high-quality compressor oil should have good anti-emulsification properties and excellent defoaming ability.
The 4 points introduced above hope to help you with the selection and requirements of screw air compressor oil. However, because different manufacturers have different choices for air compressor oil, it is recommended to choose air compressor oil according to the requirements of the air compressor manufacturer. This can avoid some disputes in after-sales and maintenance.