Hydraulics

Sustainable & easy to maintain (Hansa-Flex AG)

Adsorber filters protect hydraulic oil from contamination by moisture and dirt. In the past it was necessary to replace the entire filter element when the dessicant was completely filled with water. As part of sustainability strategy adsorbent filters are designed as an environmentally friendly and re-usable version.

Source: Hansaflex Hydraulikpresse

Oil guide (Karberg & Hennemann GmbH & Co. KG)

How to take and analyze oil samples correctly, the filtration methods for removing impurities, and how to deal with special oil types – Karberg & Hennemann get to the heart of all the important facts in their oil guide. Take a look!

Source: www.cjc.de

Hydraulics: Basics and components (Hydac Systems & Services GmbH)

The Hydac Training Center has published “Hydraulics – Basics and Components”, a comprehensive work on the subject of hydraulics. The attached reading sample gives you an insight into filter technology.

Water intake via oil-hydraulic rod sealing systems (Mielke, Tobias)

Hydraulic systems are indispensable in many areas of mechanical engineering and ensure the necessary provision of forces and torques. At the same time, hydraulic systems are subject to a trend towards cost reduction and efficiency increases, which, among other things, means that the tanks of the systems are being reduced in size or, in some cases, completely eliminated. As a result, the pressure medium in circulation can only settle insufficiently. Foreign substances, such as particles or tramp liquids, are not or only incompletely separated. One example of the introduction of such foreign substances is the entry of water, which can penetrate via the dynamic sealing point between the sealing body and the piston rod of a hydraulic cylinder.

Quelle: Diss. RWTH Aachen University, 2019

Fluid management compact (Hansa-Flex AG)

Hansa Flex shows how to detect oil-related machine problems in good time and prevent them by taking preventive measures.

Water in the hydraulic system (Panolin AG)

Water in the hydraulic system: a frequently underestimated and partly unrecognized danger. But where does the water come from, how much is tolerable, how can it be detected and what can be done about it? Four questions … four answers.

Source: www.panolin.com

Harmful influencing factors … or enemies of hydraulic oil (Hielscher, Ulrich)

Hydraulic oil is more than just any operating material and is a significant design element in the planning, operation and maintenance of hydraulic systems. There are multiple entry points for water in hydraulic power units. Hydraulic systems can be protected from condensation water damage and unplanned shutdowns by using an adsorber filter.

Source: Exzellent – Tagungsband 17. SWB Tagung, Pages 13-15

How to protect hydraulic systems from condensation (Lauther, Felix)

Water is life, they say. However, water in hydraulic oil can lead to the death of the hydraulic system. The causes that lead to condensation in the system are many. If there is water in the oil, the hydraulic system is in danger. With the right filter system, you can protect your machine.

Source: www.fluid.de/hydraulik/so-schuetzen-sie-hydrauliksysteme-vor-kondenswasser-223.html, 30.09.2019

In dry clothes (Kaineder, Jörg)

Water in the oil is a serious diagnosis for many hydraulic systems and can lead to higher wear and leaks. The remedy is adsorber filters, which prevent moisture from entering via the ventilation. Although this can prevent massive damage and high costs, few systems are equipped with them. Operators often mistakenly assume that they do not need protection against condensation. But which systems should be equipped with an adsorber filter? And how do they work?

Hydraulikpresse 3/2019, Pages 20-23

Dried out (Laas, Heinrich)

Rapidly biodegradable hydraulic oils must be protected from contamination with water. The example of a hydraulic system in a hydropower plant shows when an aeration dryer can extend the maintenance intervals of the oil and reduce the risk of failures.

Water contamination in hydraulic and lube systems (Day, Mike)

Water and oil don’t mix – that’s a well-known saying in the lubricants industry. But what exactly does that mean? Yes, water contamination can be problematic, but how can water be measured? Can it be controlled? What are the best ways to remove it? This article describes the adverse effects of water contamination on hydraulic and other lubrication systems and explains ways to measure, control and remove water.

Source: www.machinerylubrication.com, 25.05.2019

Why is there water in my oil (Dellinger, Chris)

There are various ways in which water can enter the oil. A very common entry point is the vent cap. Especially in systems exposed to the elements, rain can get into the tank, water can get through worn seals, through the tank covers or into the access plate. Very humid outside air can also enter the vent cap, and temperature changes will cause the air to release its water into the oil.

GPM Hydraulic Consulting, Inc. www.gpmhydraulic.com, 25.05.2019

Know the effects of water contamination (Noria Corporation)

Water ingress is the second most destructive contaminant and can cause damage to your system. Emulsified water is defined as microscopic globules of water dispersed in a stable suspension in the oil. Because all water conditions in oil can damage the oil and the machine, emulsified water is considered the most destructive element.

Source: www.noria.com, 25.05.2019

Water content (Oelcheck GmbH)

In addition to dust, water is a very common contaminant in oils and greases. It impairs the formation of lubricant films and is a cause of corrosion of machinery and equipment.

Source: https://de.oelcheck.com, 17.05.2019

Water access in hydraulic systems (Mielke, Tobias)

Water in hydraulic systems causes problems and leads to damage, so it is essential to avoid its entry. Effects of water in oil hydraulic systems were discussed in the previous issue. But what is the source of the danger? And how does water get into the system in the first place? These questions are addressed in this article. In addition to potential entry points, the amount to be expected in each case is also discussed.

Quelle: O+P Fluidtechnik 7-8/2018, Pages 44-50

Damage by water in hydraulic systems (Mielke, Tobias)

Everyone who deals with hydraulics learns that water in the system is harmful and should therefore be avoided at all costs. But what is the source of the danger? What is water doing in the system? And how does it get in there in the first place? These questions are explored in this article and one that builds on it and will appear in the next issue. First, the damage mechanisms and locations are discussed. The following article will discuss the entry points.

Source: O+P Fluidtechnik 6/2018, Pages 52-58

What percentage of water is critical (Oelcheck GmbH)

The proportion of water in the hydraulic oil should not exceed 0.12%. The range 0.10 to 0.12% is already critical. Here, at least oil-care measures should be carried out. From a concentration of 0.12% on, however, an oil change is absolutely necessary because of too much water in the oil.

Source: https://de.oelcheck.com, 25.05.2018

Tank breather and breather filters … the first way to oil care (Pohlmann, Marco)

Every operator of hydraulic systems should be aware of and pay attention to the topic of oil care. The background to this is the natural aging of hydraulic oils, known as oxidation. Oil care is required to counteract this process.

Source: www.fluid.de, 30.08.2016

How to deal with water in hydraulic oil? (Bendan, Casey)

If you have been working with hydraulic equipment for any length of time, it is likely that you have encountered a hydraulic system with cloudy oil. Oil becomes cloudy when it is contaminated with water above its saturation level. The degree of saturation is the amount of water that can dissolve in the molecular chemistry of the oil, and is typically 200 – 300 ppm at 68 °F (20 °C) for mineral hydraulic oil. Note that turbid hydraulic oil will have at least 200 – 300 ppm of water present. I recently tested a hydraulic system with cloudy oil that contained more than 1% (10,000 ppm) water.

Source: www.hydraulicspneumatics.com, 17.05.2019

The most common filter errors (Pohlmann, Marco)

When selecting a filter, it is worthwhile not only to pay attention to the filter fineness, but also to distinguish between absolute and nominal filter fineness. These values provide information about the performance of the filter.

Source: Fluid 03/2016, Pages 54-55

Avoid expensive machine damage (Winkler, Helmut)

Oil contamination causes 80 percent of hydraulic failures: Hydraulic oils are not free of water and air. To prevent expensive and unnecessary machine damage, permissible limit values should be defined. TR specialist Helmut Winkler provides valuable tips on how to define and monitor such values. He also takes a look at special potential hazards and how to avoid them.

Source: Technische Rundschau 12/2012

Preventing against water (Laas, Heinrich)

From flight simulators to drilling rigs – the requirements for reliable use of hydraulic systems are constantly increasing. At the same time, unplanned downtime and high maintenance costs jeopardize a company’s productivity. Contamination of the pressure fluids is the most frequent cause of damage. The use of adsorbers can counteract this preventively.

Source: Fluid Markt 2013, Pages 118-119

Avoid damages and failures (Laas, Heinrich)

Aeration dryers are used to protect hydraulic fluids from contamination with atmospheric moisture. However, for efficient air dehumidification the correct design as well as the selection of the adsorbents is crucial. By taking into account important influencing factors, GIEBEL Adsorbers® achieve better water separation performance and thus longer service lives.

Source: O+P 9/2012, Pages 2-3

Protection against water and dust (Giebel, Jochen)

Along with dirt particles, water is the secret cause of cost-intensive malfunctions in hydraulic units, gearboxes and circulating oil lubrication systems. Preventive maintenance helps to achieve longer service lives.

Source: www.instandhaltung.de, 03.02.2010

When mineral oil is no longer enough (Schulze, Rudolf)

Environmentally compatible, water-free, synthetic hydraulic oils have been developed in the USA for use in extremely stressed hydraulic systems and hydrostats. “Fluid” researched the use of HFDU fluids under hot ambient conditions with the European representative of the US company ACT.

Source: Fluid 3/2008, Pages 36-37

Bio extends oil change intervals by five times (NN)

Failures, misfortunes and breakdowns with rapeseed oil have long been a thing of the past. At least that was the opinion of the 50 or so participants at a biolubricant workshop at which users in hydraulic steel construction and inland shipping reported on their current experiences.

Source: Produktion Nr. 32, 2002

Gears

How water kills bearings (UE Systems Inc.)

Out of all contaminants known to affect bearing life, water arguably does the most harm. It only takes a small amount to lessen the oil’s ability to properly do its job, creating friction, oxidation and more. Recognizing water-related failure modes can help you determine the optimum lubricants, seals and bearings to protect your equipment’s oil.

Quelle: www.uesystems.com, 12.10.2021

Storage tanks

Russian regulation on storage tanks with acids (Order Rostekhnadzo)

The Russian TÜV and technical legislator Rostekhnadzor has published a legal act, according to the fact that storage tanks with acids must be equipped with devices that prevent the penetration of moisture or moist air into the storage room. Our adsorbers can take on this task.

Source: https://legalacts.ru/doc/prikaz-rostekhnadzora-ot-07122020-n-500-ob-utverzhdenii-federalnykh/, 23.04.2021

Poor, old, sick diesel? (Hermann, Michael)

Nowadays, diesel fuel not only suffers from bacterial infections, but age also literally leaves its mark – in the tank. Michael Herrmann presents remedies that can help the fuel.

Source: PALSTEK 4/16, Pages 70-81