ASTM-D7752 2011

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D7752-11 Standard Practice for Evaluating Compatibility of Mixtures of Hydraulic Fluids

Published By	Publication Date	Number of Pages
ASTM	2011	6

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Category: ASTM

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Description

ASTM D7752-11

Historical Standard: Standard Practice for Evaluating Compatibility of Mixtures of Hydraulic Fluids

ASTM D7752

Scope

1.1 This practice covers the compatibility of mixtures of hydraulic fluids as defined by Specifications D6158, DIN 51524, ISO 11158, and ISO 15380.

1.2 This practice can be used to evaluate new (unused) lubricant compatibility or the effects of combining new (replacement) lubricant with in-service (original) lubricant in the system.

1.3 To evaluate primary compatibility using this method, the replacement fluid must pass the ISO 13357-1 Stage II filterability test. The original fluid is not required to pass ISO 13357-1 filterability test, Stage I or II.

1.4 Primary testing is conducted on fluid mixtures in 2:98, 10:90, and 50:50 ratios using the ISO 13357-1 Filterability Test, Stage II.

1.5 Secondary testing is suggested when circumstances indicate the need for additional testing.

1.6 This practice does not evaluate the wear prevention characteristics, load carrying capacity, or the mechanical shear stability of lubricant mixtures while in service. If anti-wear (AW), extreme pressure (EP), or shear stability are to be evaluated, further testing of these parameters may be required.

1.7 This practice does not purport to cover all test methods that could be employed.

1.8 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.9 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Keywords

: compatibility; filterability; hydraulic fluid; mixtures

ICS Code

ICS Number Code 75.120 (Hydraulic fluids)

DOI: 10.1520/D7752-11

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents
2	Terminology Summary of Practice Significance and Use Apparatus
3	Procedure
4	Report Precision and Bias Keywords A1. FLOWCHART FOR PRIMARY TESTING FOR COMPATIBILITY OF HYDRAULIC FLUIDS A1.1
5	FIG. A1.1

Additional information

Standard Title	D7752-11 Standard Practice for Evaluating Compatibility of Mixtures of Hydraulic Fluids
Published Code	ASTM
Publication Date	2011
Pages Count	6