The hydraulic filter is a device that is designed to clean the working fluid from metal chips, dust, fine impurities, elements of the chemical decomposition of oil, as well as fibers.
Area of use
These consumables are widely used in manufacturing, in the field of road construction, as well as in other areas. Installation of the filter guarantees the safety of the working components of valves, pumps, servomotors, etc. This includes hydraulic drive systems of mobile equipment and machines operating in conditions of high friction and pressure. At the same time, the elements can constantly come into contact with the working fluid.
Description
The hydraulic filter consists of a cup or housing, a filter element, a fill indicator, and a bypass valve. The first of these elements is made of stainless steel, aluminum, less often of plastic. If the case is worn out, it can be disassembled and replaced. The choice of housing material depends on the operating conditions and temperature.
As for the filter element, it can be multi-use or disposable. In the first case, consumable components can be subjected to regeneration. The basis is glass fiber or paper, if we are talking about a disposable filter element. Reusable are made using stainless steel fiber as well as metal mesh. Once the regeneration filter is full, the screen can be cleaned by blowing with compressed air. Soaking is sometimes done in special solutions. Such a hydraulic filter can last about 10 years. In order for the user to be able to determine that the filter is filled with contaminants, it is equipped with a fill indicator, which can be represented by its visual-electrical, electrical or visual type.
The latter variety has built-in LEDs. If the filter has an electric indicator, it sends a signal to the control device. It can be a switch off and on. In some cases, the signal is sent to a computer controlled by the operator. The simplest are the visual-electrical indicators, which provide a signal to the control system or LED. An overflow valve acts as another element of the hydraulic filter . It is designed to let oil through at peak pressure, which is 2.5 bar. Such a valve is not installed on all filter elements. If the device is not equipped with a bypass system, then at the time of filling the filter, it may burst, and mechanical particles enter the system.
Types of hydraulic filters depending on the installation location
The hydraulic filter, depending on the location, is designed differently. It can be suction, pressure or drain. The first option is installed directly in front of the pumping equipment and is responsible for the selection of coarse particles. Suction filters imply the need for careful selection of size, the only way to avoid cavitation, which is the occurrence of air bubbles in the oil.
Pressure filters are installed after the pumping equipment and are characterized by strong fluid filtration. For fine cleaning of oil, which has gone through the entire hydraulic process, a hydraulic oil drain filter is used. Such elements are located before draining the oil into the tank. A distinctive feature, which is a plus, is the perfect cleaning of oil from fine particles.
Fleetguard hydraulic filter reviews
If you need a hydraulic filter , you may prefer a product from the manufacturer. As users emphasize, it is distinguished by excellent quality and environmental safety. Some filtering devices of this company are supplied with special Stratapore material, which surpasses paper analogues. As practice shows, the paper base retains the cleaning properties for a short time, then the filtration efficiency decreases, the device becomes unusable.
As for the special Stratapore material, it is created from five layers. The first is cellulose, while the next three are polyester. And another layer is the protection of wear-resistant materials. This technology is used to make hydraulic oil filters.
Hydraulic pressure filter, according to customers, surpasses fuel analogs in characteristics. Among the pluses, one can single out the ability to work at high working pressure, which can reach 450 bar. The buyer claims that such a device has a maximum fluid throughput in excess of 500 liters per minute. Engineers design similar interchangeable elements, taking into account the occurrence of a possible pressure drop in the system.
Overview of Popular Hydraulic Filters
On sale today you can find replaceable hydraulic elements of the Donaldson brand, the lattice material of which consists of a tightly woven metal mesh. Replaceable elements have low cleaning efficiency, as they can only cope with coarse-grained elements. Their advantage is the possibility of re-use after cleaning.
Volumetric hydraulic filters are based on a material that consists of a non-woven fabric. Such a layer is able to absorb moisture, losing the ability to filter. The superficial variety of hydraulic filters of this company is made of non-woven or paper fabric with a mesh steel mesh. These filters are characterized by the highest filtering ability and mechanical strength.
Overview of Parker brand hydraulic filters
These consumables are widely used everywhere due to their high filtration quality and reliability. They are used in mechanical engineering, metallurgy and in the operation of hydroelectric power plants. On sale you can find low and medium pressure filters, dual, as well as duplex, designed for pipe installation.
Filter Dimensions
For effective work, it is important to choose a filter by size. Thus, you can purchase Fleetguard HF6317 for 1900 rubles. Its height is 210.5 mm. The model Fleetguard HF6569 has a lower height and is 240 millimeters. You will have to pay 3000 rubles for such a device. The filter element Fleetguard HF6141 has a height of 210.5 mm, and its price is 1300 rubles. The sizes of hydraulic filters are also selected depending on the size of the thread. In the first case, this parameter is equal to M24 X 1.5-6H EXT, in the second embodiment, the thread size is 1 3 / 8-12 UNF-2B, while the third of the mentioned filters has the following thread size: 1-12 UNF-2B.
Conclusion
When choosing a hydraulic filter, one must take into account that when the temperature decreases, the viscosity of the cold oil may increase. At the same time, the hydraulic resistance of the filter increases, therefore, the engine experiences oil starvation. In order to exclude its quick failure, it is necessary to correctly assess the fineness of filtration.