What Does a Hydraulic Filter Do
Hydraulic oil is the most important part of every hydraulic system. In a hydraulic system, no system can work without the proper volume of hydraulic oil. Also, any change in fluid level, fluid properties, etc. can damage the entire system we are using. If hydraulic oil is so important, what happens if it gets contaminated?
The risk of hydraulic oil contamination increases with the use of hydraulic systems. Leaks, rust, gas inflation, cavitation, damaged seals, etc... contaminate the hydraulic oil. Problems created by this contaminated hydraulic fluid are classified as degrading, transient and catastrophic failures. Degradation is a classification of failures that affect the proper functioning of a hydraulic system by slowing down operation. Transients are intermittent failures that occur at irregular intervals. Finally, catastrophic failure is the complete end of hydraulic systems. Contaminated hydraulic fluid problems can become serious. So how do we protect hydraulic systems from contamination?
Hydraulic oil filtration is the only solution for removing contaminants from the fluid in use. Particle filtration using different types of filters will remove contaminant particles such as metals, fibers, silica, elastomers and rust from hydraulic fluids.
What is a hydraulic filter?
Hydraulic filters are components of the hydraulic system used to continuously remove contaminants from hydraulic oil. This process will purify the hydraulic fluid and protect the system from damage caused by particulate content. Choose the type of hydraulic filter for a specific application based on its fluid compatibility, application type pressure drop, working pressure, size, design, etc…
Every hydraulic system contains some basic hydraulic filter components such as filter head, bowl, filter element and bypass valve. Filter heads can have inlet/outlet connections of different sizes. It allows contaminated fluid to enter and filtered fluid to exit. The filter bowl is located in a housing that is threaded to the filter head and will protect the filter element by controlling fluid flow. This element is considered the most important component that holds the filter media to remove contaminants. The bypass valve may be a relief valve that opens to allow direct hydraulic fluid flow if the filter contains more dirt deposits.
Hydraulic filters are located in different parts of the hydraulic system and prevent contaminant particles from entering the system. Air filters, suction filters, pressure filters, return filters, and off-line filters are some common hydraulic filters.
The air filter is a hydraulically applied breathing system in operation, drawing air in and out.
The oil suction filter/hydraulic pump filter is used as a hydraulic oil purification component installed before the hydraulic pump.
A pressure filter is placed after the hydraulic pump to handle system pressure and flow.
The oil return filter purifies the hydraulic oil before returning to the tank.
Offline/renal circulation/recirculation filters are small self-contained subsystems consisting of filters, pumps, motors and hardware connections.
With the exception of off-line filters, hydraulic filters work on a similar basic principle. In general, the working fluid in the hydraulic system enters from the inlet of the hydraulic filter, and is pumped out from the outlet of the hydraulic system after filtering. Due to continuous operation, the deposits of dirt particles at the inlet of the filter element will create a pressure differential between the inlet and outlet of the filter. When the bypass relief valve senses this pressure differential, the valve will open and pass fluid directly from the inlet to the outlet by sending instructions to change/clean the filter.
Why use a hydraulic filter?
Hydraulic filters are mainly used in various hydraulic systems in industry. These filters have many advantages to ensure the safe operation of hydraulic systems. Some of the benefits of hydraulic oil filters are listed below.
Eliminate the presence of foreign bodies in hydraulic oil
Protects hydraulic systems from particulate contamination
Improve overall efficiency and productivity
Compatible with most hydraulic systems
low maintenance cost
Increase the service life of the hydraulic system
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Application
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How Importance of Hydraulic Filters?
Filtering pollutants is essential and also a significant treatment in lorries and also tools. Like how vehicles need gas filters to ensure impurity filtering of fuel, huge cars, as well as tools, need filters to Hydraulics.
View MoreHow to Choose a Hydraulic Filter?
The hydraulic filter is the main component of hydraulic system pollution control, its design is directly related to the safety and reliability of the system. In practical application, many users still have many misunderstandings about filter selection and use, which will affect the normal work of the hydraulic system if not corrected.
View MoreThe hydraulic filter is a component used in the hydraulic system to continuously remove contaminants from the hydraulic oil. This process will purify the hydraulic oil and protect the system from damage caused by particle content.
View MoreWhere Are Hydraulic Filters Used?
Hydraulic filters are utilized throughout a hydraulic system particle contamination is to be eliminated. Particle contamination can be consumed with the storage tank, created throughout the manufacture of system components, or created internally from the hydraulic parts themselves (especially pumps as well as motors).
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In a hydraulic system, every filter plays an important role. In a perfect hydraulic system, oil is filtered at every stage of the circuit before and after it enters each component.
In practice, cost, physical space, and the need to reduce system pressure limit the number of filters a machine can efficiently accommodate.
Manufacturers design their systems to be as efficient and cost-effective as possible.
Often found in hydraulic tanks, their only real use is to keep insects, nuts and bolts, and other large visible contaminants (above 150 microns) out of the pump.
Even if there is a small chance of a large object entering the hydraulic tank, it is worthwhile to use a low-cost suction filter.
It prevents extensive damage to expensive hydraulic pumps (not to mention downtime costs for equipment owners).
In rare cases, suction filters also help prevent air bubbles from entering the hydraulic circuit
Filtration, prioritized or not, is one of the most important components in a hydraulic system, and it can affect machine operation for 10 years or cause costly component damage in seconds.
Suction filters are usually "stones and rags" catchers that you place in the tank to filter out any bolts or rags that may have fallen into the tank, they are usually not used to filter fluids to the desired ISO code.
Once you have determined which type of filter to use, you must consider the pressure drop across the filter.
In most cases, both the pressure filter and the return filter have a bypass that protects the system if the filter becomes clogged or clogged.
It allows the oil to bypass the filter element and allow the system to operate even if it is not being filtered.
As your filter gets dirtier, it needs more pressure to push oil through the filter element as it gets clogged with dirt and debris.
Once the required pressure reaches a certain point, it becomes inefficient and starts wasting horsepower in the hydraulic system
While all three filter types are generally not required in the same system, it is important to have at least one pressure filter or one return line filter in each application to maintain the required level of fluid cleanliness for hydraulic components.
In most cases, both the pressure filter and the return filter have a bypass that protects the system if the filter becomes clogged or clogged.
It allows the oil to bypass the filter element and allow the system to operate even if it is not being filtered.
Maintaining the hydraulic oil in your machine is an important consideration when selecting and extending the life of a hydraulic filter
Even well-maintained oils can wear out over time, but here are some factors that affect hydraulic oil and when it's worthwhile to replace the filter.
It is very important to introduce clean oil into the system. It is much easier to prevent dirt from entering the system by using precautions than removing it from the hydraulic system.