Innovative filtration reduce TCO

Not applicable

Bosch Rexroth is introducing a new generation of filter media, using state-of-the-art materials and advanced designs to protect hydraulic systems, reduce overall costs and improve hydraulic total cost of ownership (TCO).


No other industrial and manufacturing drive technology provides the power density, life cycle performance and resistance to adverse environmental conditions off ered by hydraulics. This only applies, however, as long as the hydraulic fluid is not contaminated.


Similar to pathogens in humans, particles in the hydraulic fluid, invisible to the naked eye, can lead to malfunctions and permanent damage even in large systems—and as hydraulic technologies are engineered to tighter tolerances and utilize higher pressures, sensitivity to particle contamination has increased. It is useful to take into consideration several key aspects of fi ltration, in order for hydraulic systems users to make intelligent and eff ective use of this newest generation of fi lter media. These considerations include:

  • Cleanliness requirements of hydraulic systems
  • Technical criteria for fi lter selection:
    • Filter rating
    • Retention rate
    • Dirt holding capacity
    • Pressure diff erential
  • Controlling/reducing life cycle costs


Requirements for hydraulic systems cleanliness

For centuries, people attributed contagious diseases to a wide variety of causes because they were not able to detect pathogens such as viruses or bacteria without microscopes and scientifi c insights. In hydraulic systems, many malfunctions are caused by very small particles in the hydraulic oil as well. According to research, contamination is the number one cause for failures of hydraulic systems accounting for 80 percent of these failures. Solid particles are primarily responsible for abrasion in components. Their eff ect depends on the particle’s shape, hardness and material composition. Rigid and sharp-edged parts are the most common cause of damage. Furthermore, the level of damage and abrasion depends on factors including working fluid pressure, size and geometry of the particle, and particle velocity, among others.

>It is useful to take into
consideration several key
aspects of filtration, in
order for hydraulic systems
users to make intelligent and
effective use of this newest
generation of filter media.

Generally speaking, the higher the system’s working pressure, the more forcefully particles will be pressed into component gaps, thus increasing the risk and potential severity of the system damage. One source of contamination is the production and assembly of new hydraulic systems. Even with extremely thorough cleaning prior to system commissioning, contamination cannot be completely removed and then gets into the hydraulic fluid during operation over time.
During operation, dirt may enter into the system from the plant air or via the piston rods. Internally, particles are mainly produced by the abrasion and erosion of metal components and seals. Chemically generated substances, such as oil aging products, oxidation residues and substances insoluble in oil due to the mixing of oils, are additional contamination sources.

Not visible to the naked eye: Contamination particles in hydraulic fl uids are classifi ed based on their size in thousandth of a millimeter (μm). With
optimum lighting conditions, the human eye can see objects only down to a size of 40 μm. The particles which are particularly dangerous for hydraulic systems are 15 μm and smaller and can therefore not be detected in a visual inspection. Users can only determine the actual contamination level using particle counters. There are two possibilities: Users take an oil sample either regularly or after special occurrences and analyze it for contamination. The second option is the integration of a particle counter in the hydraulic circuit. In this way, users can continuously monitor the contamination with particles.


Visual inspection of hydraulic fluid is insufficient to protect systems, since most fluid contaminants are too small to be seen with the naked eye.


Contamination risks with new fluids: New hydraulic fl uids can have a high level of contamination, which is why users should not assume that new operating liquids are particularly clean and therefore safe. Particularly after filling systems with new hydraulic fluids, filtration is extremely important. Best practices can include performing professional fl uid analysis to gain information on the actual contamination of the hydraulic fluid; if possible, new fluid should be filtered once before being added to hydraulic systems.


Technical criteria for filter selection

Filters clean operating liquids by retaining particles of a defi ned size in the fi lter material. They thus guarantee proper function and a long life cycle of the
hydraulic system. There are four important criteria that industrial operators should consider when selecting the right fi lter for their equipment:

  • Filter rating
  • Retention rate
  • Dirt holding capacity
  • Pressure diff erential

Only the overall consideration of all properties leads to the optimum technical and economical solution. Recently developed fi lter materials have set new standards regarding economic efficiency.
Filter rating: The tolerated particle size in a hydraulic fl uid results from the fi tting tolerance or as well from the lowest gap of the component applied in the system. In combination with the system pressure as well as the general sensitivity of a component, the so called fl uid cleanlineness is derived and stated in
the data sheet of the respective component. Particles, which often show a laminar type due to the chipping type of their appearance can move without in general causing damage even through the smaller tolerances of e.g. a gear pump (<0,5μm).

>Recently developed filter
materials have set new
standards regarding
economic efficiency.

High-class fi lter elements are as well able to segregate even smaller particles than indicated on the grade of fi ltration. The indicated grades of fi ltration are therefore to be understood as recommendation which are collected due to a long-time experience of diff erent systems. Besides the pollution with particles the users have to take into consideration also more infl uences by environmental conditions and production processes. To this are counted among e.g. the infl uence on the filtration bearing by water or air in the oil.

Retention rate: The retention rate indicates how many particles of a certain size are retained in the filter mesh and how many reach the clean side. This ratio is measured in ßx according to ISO 16889. The number of particles in the specified filter rating is measured upstream and downstream of the fi lter. If one of 100 retained particles reaches the clean side, then the ß-value is 100 for the specifi ed fi lter rating x.
If the considered size “x”, e.g. 10 μm has reached a ß-value of minimum 200, then the fi lter is by definition according to the DIN24550 a fi lter with the fineness 10 μm. Depending on the fi lter rating, new fi lter materials have ß-values between 200 and 1,000.
As a result, users achieve excellent fi ltration performance and increase their system availability thanks to optimally cleaned hydraulic fluids.

Dirt holding capacity: The dirt holding capacity is also measured according to ISO16889 and indicates the capacity of a fi lter and is the decisive factor for the duration of the replacement intervals. The more dirt is absorbed by a fi lter, the longer the replacement interval and the lower the fi ltration costs. Compared to the previous generation, newly developed filter elements absorb up to 50 percent more particles thanks to ideally engineered multi-layer filter materials made of glass fi bers. They therefore have a longer service life and reduce the life cycle costs of the hydraulic system.

Pressure differential: Every filter element causes a differential presssure between the clean side and the dirt side. This diff erential pressure is rated for the filter element itself and for the fi lter by the test method ISO 3968. While the fi lter is working the quantity of contamination and the filter efficiency have influence on the level of the differential pressure.
The higher the flow resistance the liquid has to overcome the more pressure gets lost and has to be recreated with a lot of energy. In spite of a higher retention rate and dirt hold capacity the new filter materials have still a very low starting differential pressure.


Conductive woven filter materials

End users of hydraulic systems increasingly use zinc- and ash-free oils. These hydraulic media usually have reduced conductivity. If it is less than 300 picosiemens per meter, the danger of electrostatic discharge increases. Discharge processes are often visible in the form of spark discharges or can be identifi ed by a crackling noise. Each discharge can burn tiny amounts of oil and reduce the service life of the medium. Discharges can also cause pin hole damage fi lter layers. This reduces the retention rate and increases the danger of particles passing through the fi lter and causing damage in the system.

Newly developed fi lter elements are equipped with an additional electrical conductive layer as a standard. It provides for a charge exchange between oil and fi lter material and thereby reduces the risk of electrostatic charge and discharge in the filter.

Reducing life cycle costs

Effective filtration increases the availability and life cycle of hydraulic systems. However, there are operational costs associated with the proper use of fluid filtration: labor and downtime costs required for exchanging filter elements on a regular basis.
In this regard, newly developed filter elements can reduce the life cycle costs in several ways:

  • The dirt holding capacity which is increased up to 50 percent prolongs the replacement intervals. This means a reduction in labor, material and disposal costs.
  • The optimum retention rate of the new filter elements and their electrical conductive properties reliably protect hydraulic systems and prevent damage or system downtime due to contamination—which is the cause of 80 percent of hydraulic system failures.

>Newly developed filter
elements can reduce the life
cycle costs in several ways.



Hydraulic fluid is often referred to as the “life-blood” of hydraulic systems—and with good reason: keeping this fluid clean and contaminant-free is essential to preventing damage and increasing the life cycle of these systems. Newly developed filter materials for more powerful filter elements reduce the operating costs by ensuring a longer service life.

For future filter exchanges, users should therefore fi rst compare the technical specifications of filter elements by different suppliers. Independent of the manufacturer of the filter housing, the operating costs can be significantly reduced by using the new generation of filter media.

More information: http://apps.boschrexroth.com/microsites/purepower/

Simple Show: https://www.youtube.com/watch?v=51QpbyV11yQ

Technical description: https://www.youtube.com/watch?v=QTKOu51wNxQ


Must Read

New Poster

Necessary Clothing Coupon Code: Necessary Clothing is a chain of fashion clothing stores throughout the downtown New York City area. Our stores offer affordable apparel, shoes, and accessories for trendy young women. 

New Poster

Fabletics Promo Code

 Fabletics Promo Code is an American online streaming service shop that offers Discount Coupons up to 50%, For you to get menswear, ready - to - wear for both males and females, generally referred to it as 'activewear.' The firm is well recognized because of its e-commerce market model and it has 22 wood frame outlets as well. Buy Fabletics Coupon Code and avail up to 50% on all current offers, reasonably priced, and trendy running shoes. For just about any exercise, shop swim shorts, tank tops, jogging, shirts, blazers and much more Inexpensive, good quality and trendy girl's gym clothes. 

New Poster

Get Stadium Goods Promo Code and avail 5% OFF, it is an online store that offers a various version of shoes, sweat-shirts, and in vogue activewear. Stadium Goods is known for its head-turning plans, Quality, and reasonableness. We offer clients an available front to find the most recent, popular items at radically low prices only by Stadium Goods Coupons Code. Footwear intended for different games should meet the extraordinary necessities of its particular reason.

New Poster

TS Plus Coupon Code is really the best Remote Access programme and a Citrix/TSE substitute. Accessible on Windows 7 to W10 Pro and 2008 to 2019 Server. After trying to install the 2003/2008/2012 TSE (RDS) or Citrix, TS plus offers multiple sessions, data aggregation, standardized server, transparent network access, network management, stable RDP and far more. Get the new TS Plus Coupons, Savings Coupons, Online TS Plus Discount Code, TS Plus Promo Code and Cash Savings Discount Code.

New Poster

Get 30% off on Covenant Eyes Promo Code, Now stop pornography and live clean. The computer-wide transparency enables the individual the influence of interactions to avoid watching porn and maintain lasting liberty & dignity. Bring the Covenant Eyes Coupon Code and Encourages yourself to Leave Pornography, Through tracking your gadgets and submitting a summary of your computer behavior to a trusted friend or ally, Covenant Eyes lets you avoid watching porn.

New Poster

Get Verified Shapa Promo Code. & Shapa Coupon Code. The Shapa team consists of scientists, technologists and entrepreneurs passionate about using behavioral science to create innovative products that customers will love while also empowering them to change their behaviors, built long term healthy habits, and prevent disease.

New Poster

Launched in January 2015, Nutaku Code is an online game portal dedicated to bringing the highest quality games to our committed fans. ... Our company provides a host of services for game developers, ranging from well-established studios to newly created startups.

New Poster

At Cheddars Coupon you can use the lowest price to buy the hottest items, we will provide you with the most correct price, quality and service.

New Poster

Skyo Promotional code is an online book shop where parents and students could rent or buy cheap textbooks thus saving more on book costs. Over 5 million book titles from a variety of categories are available here in hardcopy or digital format, brand new or used copies.

New Poster

Necessary clothing Coupon Code helps you save on coupon and promo codes Necessary clothing Coupons Is the best coupon to save on Necessary clothing.com, utter coupons provide updated coupons and promo codes on daily basis as Necessary clothing Coupons to help you in saving while enjoying the best facility, you can avail this offer by clicking on the Show Code or Get deal button to use Necessary clothing Coupons and you can also use other codes and promo codes of Necessary clothing Coupons if one may not be working or not accepted.

New Poster

Eaze Coupon helps you save on coupon and promo codes Eaze Coupon Is the best coupon to save on Eaze.com, utter coupons provide updated coupons and promo codes on daily basis as Eaze Coupon to help you in saving while enjoying the best facility, you can avail this offer by clicking on the Show Code or Get deal button to use Eaze Coupon and you can also use other codes and promo codes of Eaze Coupon if one may not be working or not accepted.

New Poster


Fairweather Coupons code helps you save on coupon and promo codes. 

New Poster


"Rule the kitchen" and master the art of deal hunting with Ninja Kitchen coupon codes. Ninja Kitchen crafts the tools you need to whip up smoothies, rock roasts and much more.