The importance of oil sampling and the best practice to employ

13 April, 2017

• 18 – represents a range or count of particulate from 1300 – 2500 at 4 micron and greater in size.

• 16 – represents a range or count of particulate from 320 – 640 at 6 micron and greater in size.

• 13 – represents a range or count of particulate from 40 – 80 at 14 micron and greater in size.

How is water measured?

Hydraulic oils will have a specified level of water that is permissible. This is usually measured in either parts per million (PPM) or relative humidity (RH). One ppm is equivalent to 1 milligram of water per litre of oil (mg/l).

Relative Humidity is expressed as a percentage. 100% RH equates to the maximum amount of absorbed water a given oil can hold before it becomes saturated and free water forms.

Target water content levels should be no higher than 100ppm. To obtain accurate water content readings, you can use a Karl Fischer Titration method, water sensors or independent laboratory analysis.

Once the level of solid and water contamination is established the appropriate remedial actions can be undertaken. For advice on analysis, reading results or filtration best practice, please contact one of the Filtertechnik team.

Free ‘First Aid For Oils’ booklet available

This article has been compiled from content contained within Filtertechnik’s oil cleanliness guide titled ‘First Aid For Oils’. The free guide can be downloaded from www.filtertechnik.co.uk/downloads or a hard copy can be sent in the post. For a copy, call 0115 9003 600 or email sales@filtertechnik.co.uk.

www.filtertechnik.co.uk

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