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Auto-klean filters, Coalescing action filters & Streamline lubricating oil filters for marine use

Auto-klean filter

This filter can be cleaned while in operation. The filter is cleaned by rotating the centre square spindle which rotates the disc stack and the stationary cleaning blades scrape off filtered solids which settle to the bottom of the sludge well of the filter.

Periodically, the flow of oil is disrupted and the sludge well is cleaned out. To facilitate this, the filters are generally fitted in pairs. The size of particle an auto-klean filter can filter out is in order of 75 microns, but a more recent type can filter out down to 25 microns. Pressure gauges are fitted to auto-klean filters before and after the filter to determine the state of the filter, ie dirty or not.

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Auto-Klean manufacture a complete range of filters designed to protect engineering plant by the continuous removal of harmful or unwanted solids from fluids. The outstanding feature of most of these filters is that they are self-cleaning whilst in service, either by mechanical operation, or manually by the turn of a handle. Auto-Klean filters are designed for the protection of all installations incorporating fluid circulation systems, and the aim of this brochure is to assist equipment designers, manufacturers and users in accessing the correct filter solution for their needs.

Sketch of an auto klean filter

Streamline lubricating oil filter

The streamline lubricating oil filter consists of two compartment pressure vessels containing filter cartridges. Each cartridge is made up of thin discs threaded on to a `Y' or `X' shaped section rod and held in compression. The oil flows from the dirty to the clean side of the filter via small spaces between the compressed discs, then up the spaces formed by the poles in the centre. In this way, dirt is left at the edge of the disc stack. It is claimed particles of 1 micron can be filtered out. For cleaning, generally compressed air is used, valves A and B are closed and D and C are opened and reversal of flow results.

Streamline lubricating oil filter
Fig: Streamline lubricating oil filter

Coalescing action filters

Coalescing action filters, normally consist of some form of prefilter to remove particles, then followed by a compressed inorganic fibre coalescing unit in which water is collected into larger globules.

Coalescing action is the molecular attraction between the water droplets and the inorganic fibres is greater that that between the oil and the fibres, when the water globules are large enough they will move with a stream out of the coalesing unit. Downstream of the coalescing cartridges are PTFE covered stainless steel water repelling screens which act as a final barrier for the water. Water gravitates from them and from the outlet of the coalescer cartridges into the well of the filter body from where they are periodically removed.

The coalescer filter may be cleaned by draining the water off manually every so often or it may have its own back flush system.

lub oil coalescer filter
Lubricating oil coalescer filter

Related Information:

  1. Lubrication Schedule and Orders
  2. The lubrication system of an engine provides a supply of lubricating oil to the various moving parts in the engine. Its main function is to enable the formation of a film of oil between the moving parts, which reduces friction and wear. The lubricating oil is also used as a cleaner and in some engines as a coolant.....

  3. Function of Lubricating oil filters
  4. Lubricating oil filters can be found both on the suction and discharge sides of the lubricating oil pump dependent on the installation and type of engine or engines. Their maintenance is absolutely critical to the life expectancy of the crankshaft and its bearings, which depends entirely on an uninterrupted supply of clean and correctly filtered oil.....

  5. Lubricating oil treatment
  6. lubricating oils require treatment before passing to the engine. This will involve storage and heating to allow separation of water present, coarse and fine filtering to remove solid particles and also centrifuging......

  7. Lubricating oil centrifuging
  8. Lubricating oil in its passage through a diesel engine will become contaminated by wear particles, combustion products and water. The centrifuge, arranged as a purifier, is used to continuously remove these impurities....

  9. Cylinder lubrication & maintaining sump level
  10. The sump level is to be according to manufacturers/shipbuilders instructions . The ‘Sump Quantity’ is always maintained at the same safe operating level and is given in litres. It is essential that the figures are mathematically steady and correct from month-to-month, taking into account consumption, losses and refills and reported .....

The fuel oil system for a diesel engine

Function of fuel injector

Lubricating oil system for a marine diesel engine

Fresh water & sea water cooling system

Two stroke cycle diesel engines

Scavenging methods

Dealing scavange fires

Heat exchanger for running machinery

Starting air system for diesel engine

Power measurement -Engine indicator

Sea water circulation of coolers

Gearing arrangement

Function of governors

MAN B&W diesel engine

Sulzer RTA72U diesel engine

Couplings, clutches and gearboxes of a marine diesel engine

Explosion relief valve

Cylinder relief valve

Diesel engine Turning gear

Crankcase oil mist detector

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Machinery is about working principles, construction and operation of all the machinery items in a ship intended primarily for engineers working on board and those who working ashore . For any remarks please Contact us

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