Hydraulic system filter should be replaced in time

There is a component in the hydraulic system can not be ignored, this is the filter, the role of the filter As we all know, equipment users face the problem is not how to replace the filter, but when to replace. The price of the hydraulic components is much higher than the price of the filter, but if the replacement of the filter cartridge is ignored, the result may result in damage to other expensive hydraulic components such as hydraulic pumps. Of course, unnecessary replacement of the filter is a waste, but when the working conditions are relatively poor, the filter replacement cycle should be shorter than the recommended working period. So how much is this interval in the end?

Some technical staff that the filter replacement time is to wait until the filter block when the alarm, in fact, this is unreasonable. The reason is: First of all, when a filter filter plug, this filter may have been working. Secondly, since many filter devices are equipped with a bypass valve to allow the oil bypass to clog the filter, the filter is blocked when the oil is not filtered through the bypass valve into the system. And without the bypass valve of the filter, under the action of high pressure, the blocked filter may be crushed, but also make the pollutants into the system. So when the filter is blocked, the system's oil cleanliness is difficult to be guaranteed.

It is difficult to establish an accurate time to replace the filter cartridge because the rate of accumulation of contaminants in the filter is affected by many factors. They are:

The degree of cleanliness of the oil system for the first injection of the hydraulic system and the cleanliness of the added oil;

The amount of contaminants in the system due to accidental entry into the system;

In the work of equipment encountered in the pollutants and environmental dust content;

Hydraulic cylinder seal and dustproof state.

For the maintenance staff how to know when to replace the filter? An effective way is to always check the filter filter contamination, if the filter outside the careful inspection found a layer of pollutants, this time , The oil through the filter when it has been very laborious, and if the pollutants have been in the root of the core, the filter will need to be replaced. Although the filter can still capture the contaminants at this time, but soon it will begin to block the oil flow, and even a lot of oil through the bypass valve without filtration into the system, the result is the accumulation of pollutants on the hydraulic components, Wear.