一般来说，气液增压泵在使用半年一年时间或加工次数达到500000次后，还有就是当液压油由清亮透明变的混浊或成乳白色时，就说明要更换液压油了。加液压油的时候，注意不要高于或者低于油标线的范围，当液压油超过上会造成液压油吐出现象。
Generally speaking, after the gas-liquid booster pump has been used for half a year or has been processed for 500000 times, when the hydraulic oil changes from clear and transparent to cloudy or milky white, it means that the hydraulic oil needs to be replaced. When adding hydraulic oil, pay attention not to be higher or lower than the oil mark range, when the hydraulic oil exceeds the upper limit, it will cause the hydraulic oil to spit out.
液压油选用要求
Hydraulic oil selection requirements
一般来讲，液压油应满足以下方面：
Generally speaking, hydraulic oil should meet the following requirements:
1、合适的黏度等级。
1. Suitable viscosity grade.
2、纯净，少杂质。
2. Pure, less impurities.
3、具有良好的润滑性、相容性和稳定性。
3. It has good lubricity, compatibility and stability.
4、具有良好的抗乳化性、抗泡沫性、抗腐蚀性及防锈性。
4. It has good emulsification resistance, foam resistance, corrosion resistance and rust resistance.
5、体膨胀系数低，比热容高。
5. The volume expansion coefficient is low and the specific heat capacity is high.
6、流动点和凝固点低，燃点和和闪点高。
6. The flow point and freezing point are low, the ignition point and flash point are high.
7、性价比优。对人体有害性低。
7. It's cost-effective. It is low harmful to human body.
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