Standard Test Method for Dry Filterability of Lubricants and Hydraulic Fluids by Mass Flow Technique

Importancia y uso:

5.1 Precision equipment and high pressure hydraulic machinery require filtered lubricants and fluids to prevent damage from the circulation of hard particulate contaminants. Three types of particulate contaminants are present in lubricants and hydraulic fluids: built in contaminants from the machinery assembly process, generated contaminants from equipment wear, and contaminants that enter from external sources.

5.2 The ability of lubricants and hydraulic fluids to retain their filterability is critical for efficient and reliable machine performance. Normally, the pressure differential across a filter will increase gradually as the filter accumulates dirt, sludge, and wear debris. In order to prevent the filter from collapsing, bypass valves in the filter assembly open when the differential pressure gets too high. If a filter becomes blocked by precipitating additives or other contaminants, the bypass valve will open. This can lead to an equipment shutdown or circulation of damaging particles throughout the machine.

Subcomité:

D02.N0

Referida por:

D6158-23

Volúmen:

05.05

Número ICS:

75.100 (Lubricants, industrial oils and related products), 75.120 (Hydraulic fluids)

Palabras clave:

filter blocking potential; filterability; filtration; laboratory filtration;