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
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
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