How you can quickly and easily maximize the life of hydraulic oil, pumps, valves and cylinders

Hydraulic oil filtration in the maritime industry: CJC® Hydraulic Filter for highest oil cleanliness

How you can quickly and easily maximize the life of hydraulic oil, pumps, valves and cylinders

Hydraulic oil filtration in the maritime industry: CJC® Hydraulic Filter for highest oil cleanliness

Filtration and maintenance of hydraulic oil is extremely important for cranes, excavators, winches, hatches and ramps if you …

  • must change the hydraulic pumps, valves and cylinders regularly due to wear,

  • are annoyed by sticky and poorly controllable valves,

  • wish to save your hydraulic oil and extend oil change intervals and

  • don’t want to endanger processes and supply chains due to failures and malfunctions in the hydraulics.

Your solution: a CJC® Hydraulic Filter in an offline circuit. Achieve the highest oil cleanliness for maximum protection of hydraulic oil and components — quickly, efficiently and cost-effectively.


Particles and water lead to a high degree of contamination and accelerate oxidation processes and additive consumption. This affects viscosity, lubricating film thickness, shear forces, air separation capacity and the wear protection properties of the hydraulic oil – important oil condition values that decide on an oil change. Particles and water in the oil, followed by oil ageing and choosing the wrong type of oil, are considered the critical few causes that cause the most damage. They cause abrasive wear, fatigue wear, corrosion, cavitation, varnish, sludge- and resin-like deposits (valves, main flow filters, tank, pipelines, etc.) and lead to acidification of the oil and thus to further corrosion. A vicious circle.

The cleaner and drier the hydraulic oil, the more stable the oil condition values and longer the oil life — and the longer the service life of components

Damages and consequences of contaminated hydraulic oil

Water and wear particles in hydraulic oil accelerate oil ageing and oxidation processes and lead to rapid degradation of wear and corrosion protection additives, antioxidants and demulsifiers In the course of oil ageing and oxidation, the lubricating properties are also gradually lost: the viscosity increases, and soft contaminants, varnish-like deposits and acids are formed. The more and faster the hydraulic oil contaminates, the shorter the life of the lubricant.

Due to their low hydrolytic stability and oxidation resistance, most bio-oils already decompose very quickly upon contact with water. In some cases, they form stable water-in-oil emulsions, whereby the water droplets are finely distributed as a suspension throughout the oil system. Since emulsified water is particularly harmful to hydraulics, it is essential to have a system that continuously reduces the water content.

In particular, oil ageing processes increase viscosity in hydraulic oil, which results in higher tensile forces within the system and higher energy consumption.

Be careful with ester-based bio-oils: when water is introduced, the viscosity decreases, and the oil becomes thinner, influencing the lubricating effect.

In both cases, there may be contact between the metallic surfaces and thus increased wear.

Typically, operators use hydraulic oil with good water separation ability. Thus, the water cannot emulsify and can be quickly distributed throughout the hydraulic system. Demulsifier additives help to improve water separation ability, but they can be used up quickly, especially in hydraulic systems on board of vessels. Water enters the oil system at fluctuating ambient temperatures (condensation), through defective seals or via the fresh oil as a result of errors in transfer, storage and handling.

Even if your hydraulic oil has a high degree of saturation with water – e.g. polyglycol-based lubricants * – it should be noted that water dissolved in the oil can also be released in the event of temperature and pressure fluctuations, and then throughout the entire hydraulic oil system.

Water, combined with acids formed during oil ageing processes and oxidation, is highly corrosive.

To prevent corrosion, cavitation, insufficient lubrication and oil ageing, it is recommended to keep the moisture content permanently as far below the saturation limit as possible and to slow down oxidation processes.

*) e.g. PAG and PEG can have a saturation limit of over 10,000 ppm (=1%) in relation to water

In highly sensitive and highly stressed hydraulic systems, pumps, valves and pistons wear out due to even the smallest particles due to tight tolerances. These enter the hydraulic system via the ambient air, in particular through the movement of the piston or via the tank ventilation. In addition, particles are constantly generated by wear within the hydraulic system, which is unavoidable due to the moving components. But even fresh oil often does not meet the quality and purity requirements recommended for hydraulic systems. The circulation of the particles in the hydraulic system increases their number faster and faster, resulting in a chain reaction of wear.

During oil ageing processes, reaction products are additionally formed, precipitating and depositing in load zones, stagnant areas or narrow passages in the hydraulic system. Easily recognizable as a solid, sticky layer on metal surfaces of, e.g. valves, pumps, coolers, pipelines and in the tank. Particles adhere to the sticky layer – an emery effect occurs, and wear increases rapidly (altered lubrication gap geometry).

For your hydraulic oil filtration, you should therefore attach great importance to a high filtration degree (absolute) and high dirt holding capacity.

Impurities, oxidation residues and an increased viscosity worsen the air separation capacity. Air bubbles in hydraulic oil rise worse and the foam risk increases with lack of lubrication as a result.

Your solution: efficient hydraulic oil care

Efficient hydraulic oil care means continuously removing particles, water, oxidation residues and acids from the hydraulic oil (24/7). Fact is, only with permanently clean and dry hydraulic oil you …

  • achieve up to 10 times longer service life for hydraulics, pumps, valves and cylinders

  • minimize oil consumption and CO2 emissions for even more sustainability on board

  • ensure reliably functioning valve technology and controllability at all times

  • protect the existing inline filters, which clog less often and require fewer filter changes

  • avoid unplanned downtime for smooth loading and unloading processes

Filtration and maintenance of gear oil, avoid oil change thruster

Less oil consumption

Filtration and maintenance of gear oil, less maintenance required at thruster

Less maintenance

Filtration and maintenance of gear oil, higher reliability with thruster

Higher reliability

Filtration and maintenance of gear oil, higher resource protection at thruster

Higher resource protection

CJC® Hydraulic filter for efficient hydraulic oil care

You have poor cleanliness classes, a high water content and your hydraulic oil is highly oxidized? Sticky deposits have already formed on pumps and valves? Then the CJC® Hydraulic Filter saves your hydraulic oil and oil system. It ensures maximum oil cleanliness within a very short time. Extremely high filter capacities and separation capacities make it a cost-optimal solution.

The own pump unit allows installation in a separate circuit (offline) and thus the continuous depth filtration and care of the hydraulic oil (24/7). The gear pump sucks in the hydraulic oil from the lowest point of the tank. The return takes place without pressure near the suction pump, so that the hydraulic system is always supplied with the clean oil.

The CJC® Hydraulic Filter removes all impurities:

Wear particles and suspended solids

Achieve cleanliness classes up to ISO 12 (ISO 4406).

Water – free, emulsified and dissolved

for water content well below the saturation limit of the oil

Oxidation residues and acids

for long-lasting stable oxidation rate

CJC® Fine Filter Inserts are depth filters with a filtration degree of 3 µm absolute and a retention rate of < 1 µm. The whole volume of the insert is made of numerous finely ramified fibres and offers an outer surface and, in addition, an inner surface – from 120 up to 150 m² per gram. That enables the extremely high dirt holding capacity – the higher, the longer the lifetime of the filter inserts.

The fact is that our dirt holding capacities are market leaders.

CJC® Hydraulic Filters can optionally be equipped with sensors for automatic online monitoring of the filter and oil condition. Depending on the selected system, up to nine sensors can be selected – whether for oil moisture, oil temperature, particles (4-250 μm), wear particles (40-1,000 μm), oxidation rate, filter pressure and/or hydraulic utilization. You can configure alert limits and warnings to prematurely detect deviations from normal conditions and counteract them.
Our oil condition sensors provide detailed real-time data and allow conclusions about the hydraulic condition due to the high data density.
Our intuitive operable cloud applications have a clearly arranged dashboard to visualise the sensor data. The highly developed algorithms integrated into the premium monitoring package automatically evaluate and interpret the data – ideal for critical hydraulic systems where failure quickly has costly consequences. Optionally, the sensor data can be transferred to your own system via various interfaces.

CJC® Hydraulic Filters: Filter and maintain your hydraulic oil

hydraulic filter, hydraulic oil care

Contact your maritime technical salesperson now

Let’s talk about your hydraulic systems, your hydraulic oil and the specific challenges. We filter every hydraulic oil. It does not matter whether you use mineral oil or biodegradable hydraulic oil. Together with you, we maximize the service life of the oil filling, pumps, valves and cylinders.

Receive a personal consultation and a non-binding offer about a CJC® hydraulic filter for the efficient care and filtration of hydraulic oil.

Write or call me.

Andreas Mann
Andreas MannKey Account Manager - Marine Segment
Mobile: +49 (0)151 12 88 38 05
Fax: +49 (0)40 855 04 79 – 20
oil sampling, oil care in wind turbines, gearboxes, main bearings, pitch hydraulics
oil sampling, oil care in wind turbines, gearboxes, main bearings, pitch hydraulics
oil sampling, oil care in wind turbines, gearboxes, main bearings, pitch hydraulics

That say our customers

Hydraulic oil care, pontoon excavator LIEBHERR P995 Litronic

“We are very satisfied with the test process and intend to install further CJC® Hydraulic Filters.”

To the practical report – Pontoon excavator

Josef Möbius Bau-Aktiengesellschaft
schlepper, hydrauliköl filtrieren, hydrauliköl pflegen, winden

“I would highly recommend talking to CJC®! Especially if you are experiencing any oil condition problems, this system works.”

To the practical report – tug boat

Technical Supervisor, Dublin Port Company
Lube oil treatmennt, hong kong express, hapag lloyd

“Only by installing the CJC® Hydraulic Filters can the requirements for the ME hydraulic system be met.

Download Practice Report – Container Ship

Technical inspector, Hapag-Lloyd AG

“The CJC® Hydraulic Filter fulfills what it promises. I would recommend it without hesitation for cleaning a system contaminated with water and particles.

Download Practice Report – Trawler

Chief engineer, Vinnslustöðin Vestmannaeyjum, B/V Jón Vidalin

“In my experience with these systems, I can recommend them without hesitation.

Download Practice Report – Trawler

Chief engineer, Fiskafurðir, F/V Viking

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