High Quality Hydraulic Filter Element
High Quality Hydraulic Filter Element
High Quality Hydraulic Filter Element
How Can You Recognize Quality in Hydraulic Filters?
Constant Quality Original Filter Elements Five Performance Values – Theoretical Principles in Hydraulic Filter
HİDROMAN's filter elements meet very high standards in terms of quality and process reliability. Only original parts guarantee a consistently high quality standard. We'll show you what's important. Don't compromise and keep your hydraulic system clean.
The beta value must be specified along with the filter fineness. Often conflicting or incomplete information is provided; for example: 10 µm, ß10, 10 µm nom. / abs. The correct specification is: ß10 (C) = 200
A high initial pressure drop results in an increased risk of cold starting.
The bypass valve no longer closes or closes only at high operating temperature/low oil viscosity. At this stage there is only partial flow filtering.
allowing dirt particles to pass through without being filtered. At what volume flow and at what kinematic viscosity was the pressure drop ∆p measured?
Five Performance Values of Constant Quality Original Filter Elements – Theoretical Principles
At what ∆p was the dirt holding capacity last measured in the multi-pass test? Is the blockage indicator at the response pressure or collapse pressure of the bypass valve? At what volume flow was the test performed? A significantly lower test volume flow compared to the practical volumetric flow indicates a much higher dirt holding capacity than can be achieved in practice.
Early decrease in filtration stability to the point of explosion/collapse of the filter element due to insufficient stability of the perforated core or inadequate structure of the filter mesh package
Insufficient protective and supportive fabric/fleece reduces creep fatigue stability. Frequent flow rate fluctuations (e.g. in hydraulic systems)
with variable displacement pumps) can cause failure in the structure of the filter mesh package, which can lead to uncontrolled entry of dirt into the hydraulic system.
Selection and Machining Quality of Hydraulic Filter Materials and Individual Components
The poor reverse bending properties of the screen fabrics can lead to structural damage of the mesh package, i.e. metal fragments getting into the hydraulic oil. Coating particles are separated during the folding process of protective and supporting fabrics coated with epoxy resin to provide protection against corrosion.
HİDROMAN filter elements are made of patented hybrid fabric. It consists of polyester warp wire and stainless steel which increases flow fatigue strength
Weft wire to support and keep folds open for smooth flow. Since the hybrid fabric does not rust, there is no need for dyeing.
Damaged fine filter material due to poor quality and missing support. The filtering efficiency of dirt particles is significantly reduced and the hydraulic system's ability to achieve the desired oil cleanliness is compromised. The possibility of electrostatic discharge is higher due to the lack of charge balancing feature. This can damage the filter mat, especially when oils with low conductivity (< 500 pS/m) are used.
HİDROMAN filter elements have a two-layer main filter material. Pre-filter/fine filter layers serve to gradually separate dirt particles from coarse to fine.
The protective fabric protects the thin layer of the filter and increases the differential pressure stability and flow fatigue strength. HİDROMAN "Spark Protection" filter elements provide protection against electrostatic discharge thanks to their conductive braided package structure.
Know-how, Quality and Service - Your Advantages at a Glance
Did you know this …
› Can new Hydraulic oil contain 10 times more dirt particles than is generally acceptable for hydraulic systems of high technical quality?
› If the operating pressure is increased by only 50%, the number of dirt particles in the oil must be reduced by a factor of 3 to avoid deteriorating the life of the components.
› Even a filtration rate of β = 200 corresponds to a filtration efficiency of 99.5% for all dirt particles larger than the specified size and a β value of only 10
Does it still correspond to 90% efficiency?
› Could even oil sample bottles declared “clean” contain many more dirt particles than the oil being examined if they come from hydraulic systems with good filtration?
› Does a hydraulic filter's lifespan of 1,000 hours correspond to a mileage of a passenger car of approximately 60,000 km?
› Can actual values for cleanliness classes < 10 (ISO 4406) be determined only by an online count?
Quality, safety and experience
HİDROMAN operates test equipment equipped with ultra-modern technology, allowing rapid test sequences, extended test procedures and accurate documentation of all parameters:
› Multipass test rig
› Collapse/burst pressure testing equipment
› Test rig to determine pressure drop
› Test rig to prove flow fatigue resistance properties
› Compressive pulse tester to verify fatigue strength
Therefore, HİDROMAN offers quality and safety tested from A to Z.
Global presence - Our services for you
The focus of HİDROMAN's company philosophy is to provide holistic support to our customers, starting from the design of application-oriented solutions, through product development and production, and comprehensive after-sales service. HİDROMAN is represented internationally with many of its own sales companies. In addition, we cooperate with a wide network of competent sales and service partners in all important key markets, thus ensuring customer proximity and local presence. Thanks to our experts all over the world, you always have a reliable contact person by your side.
