Things to Consider While Selecting the Right Hydraulic Filter
Are you in search of a new hydraulic filter? Proper filtration is essential for the longevity of the hydraulic systems but selecting the right one for the job isn't that easy. Here we help you out by describing five essential things to consider while
selecting the right hydraulic filters.
1. Types of Filters to Choose From
This is the foremost step is the selection process. The different types of filters that are available are as follows:
1. Suction Filters: these are the filters that are placed inside the tank for filtering bolts, rags, or other items you accidentally drop in the reservoir. These are the extremely basic kind of filters.
2.Return Filters: These filters clean the oil before it comes back to the reservoir. Thereby keeping the reservoir completely clean free from unwanted dust particles that cause harm to the system. These are mainly used in open-
loop systems.
3. Pressure Filters: These are the highly recommended filters as they are placed in the system after the pump.
It should be noted that all these three types of filters are not needed to be used in the same hydraulic system, but it always better to use at least the pressure filter or return filter as they ensure the fluid to maintain appropriate cleanliness standards
that you cannot obtain from the suction filters alone.
2. Know the Viscosity
Knowing the fluid viscosity is also an essential criterion in the selection of the hydraulic oil filter. Due to the underestimated fluid viscosity, filters larger than otherwise may be specified leading to the unnecessary high operating costs. Not
understanding the viscosity can lead to under-sizing the filter, high drop in pressure, larger footprint, etc.
3. Knowing the Flow Rate
This is extremely important when sizing the filters. Here you can know the maximumflow rate of the pump. Underestimating the flow rate will lead to pressure drop through the filter element, which reduces the efficiency of the circuit and also
increases operating and maintenance costs.
4. Know the Application
It is recommended to understand the performance requirements of the filter while you go for its selection. When it comes to accurately select the filters, performance ratios are often expressed in terms of the Beta ratio which is the ratio of the particles entering the filter versus those exiting. These can be also seen as the efficiency
percentage.
5. Know the Clogging Indicator
The users should create an apt target for a low-pressure drop when sizing the filters. Clogging indicators indicate a differential pressure which ranges from 1 to 8 bar. Normally, for better functioning of the hydraulic oil filter, the ratio of the clogging
indicator setting to the clean pressure drop should be at least 3:1. If the users do not understand the impact of this ratio, then there are chances that they are risking the sizing of their filters incorrectly.
Wrapping Up
Sizing the hydraulic filter not only saves money but also increases the life of the hydraulic systems. Determine these must-haves and you will be on the safer side of the filter success.