恩施建始巴东壳牌液压油-佳度润滑脂销售处液压油在使用过程中不可避免地要经历四季的变化，因此露天设备使用低凝产品效果较好。清洁度也已成为液压油的性能要求，一般产品要NAS颗粒度等级不大于9级，清洁型产品不大于7级，高清洁型产品不大于5级，但盲目追求NAS等级不但没有任何效果，反而降低质量，增加成本。例如有些机械生产厂家，或工程机械用户没有用于添加液压油的无尘车间，即使花了大价钱购买了NAS 5级别的产品，在打开产品的瞬间，高清洁型NAS 5 液压油就变成了NAS 8的等级了，而且液压油NAS等级高意味着过滤次数多，过滤过程中就会把昂贵的添加剂成分过滤掉，因此从专业的角度来讲，NAS等级不必过于追求Hydraulic oil inevitably experiences the changes of the four seasons in the process of use, so it is better to use low-cization products for outdoor equipment. Cleanliness has also become a performance requirement for hydraulic oil, generally requiring that the NAS particle size grade of the product should not be greater than 9 the clean product should not be greater than 7, and the high-clean product should not be greater than 5, but blindly pursuing NAS grade not only has no effect but also reduces the quality and increases the cost. For example, some mechanical manufacturers or construction machinery users do not have a dust-free workshop for adding hydraulic oil, even if they a lot of money to buy NAS 5 grade products, the high-clean NAS 5 hydraulic oil becomes NAS 8 grade at the moment of opening the product, and the NAS grade of hydraulic oil means more filtration times, and the expensive additive components will be filtered out in the filtration process. Therefore, from a professional point of view, NAS grade is necessary to pursue too much