GIEBEL Know How

 

Technical contributions

 

Ulrich Hielscher - Harmful influencing factors... or enemies of hydraulic oils

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Author: Ulrich Hielscher, managing director international hydraulics academy GmbH
Source: Excellent - conference volume 17. SWB conference, P. 13 - 15

Hydraulic oil is more than just an arbitrary fuel and has become an important construction element in the planning, operation and maintenance of hydraulic systems. There are many different ways for water to enter hydraulic aggregates. Hydraulic systems can be protected against condensation water damage and unplanned downtime by using an adsorber filter.

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Felix Lauther - How to protect hydraulic systems from condensation

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Author: Felix Lauther, fluid Magazin
Source: www.fluid.de/hydraulik/so-schuetzen-sie-hydrauliksysteme-vor-kondenswasser-223.html from 30.09.2019
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 water in the system are manifold. If there is water in the oil, the hydraulic system is at risk. With the right filter system you can protect your machine.

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Jörg Kaineder - In dry cloths

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Author: Jörg Kaineder, Hansa-Flex AG
Source: Hydraulic press 3/2019, p. 20 - 23

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

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Laas, Heinrich - dried out

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Author: Heinrich Laas, Managing Director GIEBEL FilTec GmbH
Source: Fluid Technik 2019, p. 22-23

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

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Day, Mike – Water Contamination in Hydraulic and Lube Systems

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Author: Day, Mike, Pall Corporation; Bauer, Christian, Pall Corporation
Source: www.machinerylubrication.com from 25.05.2019

"Water and oil do not mix - this is a well-known saying in the lubricant industry. But what exactly does it mean? Yes, water pollution 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".

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Dellinger, Chris – Why is there water in my oil?

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Author: Dellinger, Chris, Fluid Maintenance, Reliability, Troubleshooting
Source: GPM Hydraulic Consulting, Inc. www.gpmhydraulic.com from 25.05.2019

"There are different ways in which water can get into the oil. A very common entry point is the aeration cap. Especially in systems that are exposed to the weather, 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 cause the air to release its water into the oil.

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Know the Effects of Water Contamination

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Author: NN
Source: www.noria.com from 25.05.2019

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

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Water content

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Author: NN ÖlChecker, OELCHECK GmbH
Source: https://de.oelcheck.com from 17.05.2019

"Water is beside contamination by dust a very frequent contamination in oils and fats. It impairs the formation of a lubricating film in lubricants and is a cause of corrosion of machines and equipment".

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Mielke, Tobias - Water access in hydraulic systems

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Authors: Tobias Mielke, M.Sc., Univ.-Prof.Dr.Ing. Hubertus Murrenhoff, Univ.-Prof.Dr.Ing. Katharina Schmitz, Institute of Propulsion and Systems, RWTH Aachen University
Source: O+P Fluidtechnik 7-8/2018, p. 44-50

"Water in hydraulic systems causes problems and leads to damage, so that access must be avoided at all costs. Effects of water in oil hydraulic systems were discussed in the previous issue. But where does the danger come from? And how does water even get into the system? This article examines these questions. In addition to potential access points, the expected quantity is also discussed.

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Mielke, Tobias - Damage by water in hydraulic systems

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Authors: Tobias Mielke, M.Sc., Univ.-Prof.Dr.Ing. Hubertus Murrenhoff, Univ.-Prof.Dr.Ing. Katharina Schmitz, Institute of Propulsion and Systems, RWTH Aachen University
Source: O+P Fluidtechnik 6/2018, p. 52-58

"Anyone involved in hydraulics learns that water in the system is harmful and must therefore be avoided at all costs. But where does the danger come from? What does water do in the system? And how does it even get in? These are the questions that this article and an article based on it, which will be published in the next issue, explore. First, the damage mechanisms and locations are discussed. In the following article the places of entry will be discussed."

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What percentage of water is critical?

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Author: NN ÖlChecker, OELCHECK GmbH
Source: https://de.oelcheck.com from 25.05.2018

"The proportion of water in hydraulic oil should not exceed 0.12% as a matter of principle. The range 0.10 to 0.12% is already critical. Here at least oil-maintaining measures should be carried out. From a concentration of 0.12%, however, an oil change must be carried out without fail due to too much water in the oil.

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Pohlmann, Marco - Tank breather and breather filters... The first way to oil care?

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Author: Marco Pohlmann, Trainer Line Technology, Hydraulic oils at the IHA
Source: www.fluid.de from 30.08.2016

"Every operator of hydraulic systems should know and observe the topic of oil maintenance. The background is the natural aging of hydraulic oils, the so-called oxidation. In order to counteract this process, oil care is required."

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Brendan, Casey – How to deal with water in hydraulic oil?

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Author: Casey, Brendan, Blog
Source: www.hydraulicspneumatics.com, from 17.05.2019

"If you have been working with hydraulic equipment for a long time, it is likely that you have come across a hydraulic system with cloudy oil. Oil becomes turbid when it is contaminated with water above its saturation level. Saturation level 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 if the hydraulic oil is turbid, at least 200 - 300 ppm water is present. I recently tested a hydraulic system with turbid oil that contained more than 1% (10,000 ppm) water".

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Herrmann, Michael - Poor, old, sick Diesel?

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Author: Michael Herrmann, PALSTEK publishing house GmbH
Source: PALSTEK 4/16, p. 70-81

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

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Pohlmann, Marco - The most common filter errors

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Author: Marco Pohlmann, Trainer Line Technology, Hydraulic oils at the IHA
Source: Fluid 03/2016, p. 54-55

"When choosing 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 efficiency of the filter.

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Winkler, Helmut - Avoid expensive machine damage

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Autor: Winkler, Helmut, Technik & Marketing www.tmm-muenchen.de
Quelle: Technische Rundschau 12/2012

„Ölverunreinigungen verursachen 80 Prozent der Hydraulikausfälle: Hydrauliköle sind nicht frei von Wasser und Luft. Um teure und unnötige Maschinenschäden zu verhindern, sollten zulässige Grenzwerte definiert sein. TR-Spezialist Helmut Winkler gibt wertvolle Tipps, wie solche Werte zu definieren und zu überwachen sind. Zudem wirft er einen Blick auf besondere Gefährdungspotenziale und deren Vermeidung.“

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Laas, Heinrich - Preventing against water

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Author: Heinrich Laas, Managing Director GIEBEL FilTec GmbH
Source: Fluid Markt 2013, pp. 118-119

"From flight simulators to drilling rigs - the requirements for reliable use of hydraulic systems are constantly increasing. At the same time, unplanned breakdowns and high maintenance costs endanger the productivity of a company. Contamination of hydraulic fluids is the most common cause of damage. This can be counteracted by the use of adsorbers".

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Laas, Heinrich - Avoid damages and failures

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Autor: Heinrich Laas, Managing Director GIEBEL FilTec GmbH
Source: O+P 9/2012, p. 2-3

"Ventilation dryers are used to protect hydraulic fluids from contamination with air humidity. However, for efficient air dehumidification, the correct design and selection of adsorbents are decisive. By considering important influencing factors, GIEBEL Adsorbers® achieve a better water separation performance and thus longer service life".

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Giebel, Jochen - protection against water and dust

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Author: Jochen Giebel, owner Giebel Filtertechnik
Source: www.instandhaltung.de from 03.02.2010

"Water is, besides the dirt particles, the secret cause of cost-intensive malfunctions in hydraulic units, transmissions and circulating oil lubrication systems. Through preventive maintenance, longer service lives are achieved".

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Schulze, Rudolf M. H. - When mineral oil is no longer enough

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Author: Rudolf M. H. Schulze, ACT Europe Representative
Source: Fluid 3/2008, p. 36-37

"For applications in extremely loaded hydraulic systems and hydrostats, environmentally friendly, water-free, synthetic hydraulic oils were developed in the USA. "Fluid" did research at the European representative office of the US company ACT on the use of HFDU fluids under hot environmental conditions.

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Bio extends oil change intervals by five times

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Autor: NN
Quelle: Produktion Nr. 32, 2002

„Pleiten, Pech und Pannen mit Rapsöl sind längst passé: Das meinten zumindestens die rund 50 Teilnehmer eines Bioschmierstoff-Workshops, bei dem Anwender des Stahlwasserbaus und der Binnenschifffahrt über aktuelle Erfahrungen berichteten.“

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