Misunderstandings of Daily Use of Hydraulic Oil Filters

 

 

1. A Hydraulic oil filter with a bypass valve can be left unwashed or replaced for a long time after the filter element is clogged

 

Many users think that the bypass valve of the filter and the safety valve of the system have the same function: after the filter element is clogged, the bypass valve opens, and the system oil flows through at full flow, which has no effect on the system. This is a wrong understanding. When the bypass valve of the filter is opened, the pollutants blocked by the filter element (the filtered polluted particles) will re-enter the system through the bypass valve. At this time, the local oil pollution concentration is high, which is extremely harmful to the hydraulic components, and the previous pollution control will lose its meaning. Unless the system requires very high working continuity, it is best to use a filter without a bypass valve. Even if a filter with a bypass valve is selected, when the filter pollution blocks the transmitter, the filter element must be cleaned or replaced in time. This is the way to ensure the safe and reliable operation of the system.

 

2. Judge the performance of the filter by the service life of hydraulic oil filter

 

Many users judge the performance of the filter by the service life of the filter because they do not have oil contamination detection equipment. The speed of filter clogging is used to indicate the performance of the filter. Both concepts are one-sided. The filter performance is mainly reflected by the performance indicators such as filtration ratio, dirt holding capacity, and original pressure loss. Only under the same working conditions and the cleanliness requirements of the hydraulic system are met, the longer the service life, the better.