What color is hydraulic oil?
Hydraulic oil is an indispensable working medium in hydraulic systems. Its color is not only an intuitive symbol to distinguish types, but is also closely related to performance and usage status. The following will analyze the color standards, common types and recent industry hot spots of hydraulic oil.
1. Color standards and meanings of hydraulic oil
Different types of hydraulic oil show different colors due to differences in additives and base oils. The following are common types and corresponding colors:
| Hydraulic oil type | typical color | Color change alert |
|---|---|---|
| Mineral based hydraulic oil | Amber or light yellow | Darkening may cause oxidation or contamination |
| Synthetic Hydrocarbon Hydraulic Oil (PAO) | Transparent or light yellow | Milky white indicates water intrusion |
| Fire Resistant Hydraulic Fluid (HFC) | green or blue | Turbidity needs to be replaced immediately |
| Biodegradable hydraulic oil | light green or colorless | Blackening indicates accelerated degradation |
2. Recent hot spots in the hydraulic oil industry (last 10 days)
Combined with the hot search data on the entire network, the recent focus in the field of hydraulic oil is on environmental protection and technological upgrading:
| hot topics | Main content | Data source popularity |
|---|---|---|
| EU new environmental regulations | Plan to restrict the use of zinc-containing hydraulic oil | Baidu Index rose 120% |
| Hydraulic oil AI monitoring technology | Color recognition rapid diagnosis system | WeChat reading volume: 100,000+ |
| Construction machinery oil spill incident | A certain brand malfunctioned due to mixing of red hydraulic oil | Top 50 topics on Weibo |
| Research and development of edible grade hydraulic oil | Transparent hydraulic oil for food machinery | Zhihu hot post has more than 1,000 collections |
3. Guide to handling abnormal color of hydraulic oil
Corresponding measures need to be taken when the color of the hydraulic oil changes as follows:
| unusual color | Possible reasons | Handling suggestions |
|---|---|---|
| dark brown/black | High temperature oxidation or metal wear | Replace and check filter element immediately |
| milky | Moisture mixed in (>500ppm) | Dehydration or oil change |
| fluorescent green | Mixed pollution of different oil products | Thoroughly clean the system |
4. Color guide for purchasing hydraulic oil
Things to note when choosing hydraulic oil:
1.Construction machinery: Amber anti-wear hydraulic oil (HM grade) is recommended to facilitate observation of contamination.
2.food processing: Colorless or white oil that meets FDA standards must be used
3.low temperature environment: Light-colored synthetic oil (such as transparent PAO) has better fluidity
4.high temperature system: Deep red fireproof hydraulic oil can withstand working conditions above 200℃
Summarize: The color of hydraulic oil is an important window for judging its quality. Users should regularly monitor the oil status through color changes. Recently, the industry has paid more attention to the development of environmentally friendly hydraulic oil. In the future, there may be more intelligent hydraulic oil products with color coding to distinguish functions.
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