Hydraulic filters are available in a multitude of shapes, sizes, micron ratings and construction materials. Hydraulic filters provide inbuilt protection and minimize hydraulic system breakdowns that are quite often caused by contamination.

Efficient filtration helps prevent system failure and makes a significant contribution to low cost of ownership. These are fitted for both low and high pressure hydraulic applications. The filter used in hydraulic system should be subjected to periodic and routine cleaning and maintenance. The life of a filter in a hydraulic system depends primarily on the system pressures, level of contamination and nature of contaminants.

Types of Filters
In a hydraulic system, there are two main types of filters that are frequently used. These are:

Surface filters
These are simple screens used to clean oil passing through the pores. The dirty unwanted particles are collected at the top surface of the screens when the oil is passed.

Depth filters
These are thick walled filter elements through which the oil is made to pass retaining the undesirable foreign particles. The capacity of depth filter is much higher than surface filters as much finer materials have a chance of being arrested by these filters.

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