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Hydraulic Pump Performance-A Basis for Fluid Viscosity Classification
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 01, 1990 by SAE International in United States
Annotation ability available
A series of polymer-containing fluids was evaluated in a modified ASTM D 2882 pump loop to determine both permanent viscosity loss and flow rate as a function of test time. Flow rate did not change over the course of the test. It correlated equally well with either new oil high-shear-rate viscosity or used oil kinematic viscosity.
The current ISO viscosity classification system provides no means to differentiate the levels of performance observed. It is proposed that a new, more meaningful viscosity classification system be adopted for hydraulic fluids. This system should maintain continuity with the current system, but should account for permanent viscosity loss of polymer-containing fluids. Measured low temperature properties should also be part of any new viscosity classification.
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CitationStambaugh, R., Kopko, R., and Roland, T., "Hydraulic Pump Performance-A Basis for Fluid Viscosity Classification," SAE Technical Paper 901633, 1990, https://doi.org/10.4271/901633.
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