JB/T 7857-2006 (English Version) PDF

Scope: This standard specifies the method for evaluating the contamination sensitivity of hydraulic valves. This method evaluates the performance changes of hydraulic valves caused by solid particle contaminants from two aspects: contamination clamping and contamination wear/erosion. The main purpose of this method is to compare the sensitivity of different types of hydraulic valves to particulate contaminants under the same test conditions. Since it is impossible to test all working conditions that may occur on site, the test results cannot be used as a basis for quantitatively evaluating the performance of hydraulic valves under actual contamination conditions on site. This assessment method can be used to obtain the effect of different particle sizes and contamination concentrations on contamination jamming and contamination wear/erosion of hydraulic valves, thereby determining the filtration requirements required to protect hydraulic valves. This standard applies to all types of hydraulic valves that use hydraulic oil as the working medium.

JB/T 7857-2006 Referenced Document

GB/T 14039-2002 Hydraulic fluid power--Fluids--Method for coding the level of contamination by solid particles
GB/T 17446 Fluid Transmission Systems and Components Glossary*， 2024-03-15 Update
GB/T 18854 Hydraulic fluid power.Calibration of automatic particle counters for liquids*， 2015-12-31 Update
GB/T 8104 Hydraulic fluid power--Valves--Testing method of flow control valves
GB/T 8105 Hydraulic fluid power--Valves--Testing method of pressure control valves
GB/T 8106 Hydraulic fluid power--Valves--Testing method of directional control valves
ISO 12103-1 Road vehicles — Test contaminants for filter evaluation — Part 1: Arizona test dust*， 2024-01-23 Update

2006 JB/T 7857-2006 Hydraulic fluid power Valves Method of evaluating contaminant sensitivity
1995 JB/T 7857-1995 Method for assessing the contamination sensitivity of hydraulic valves