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Aerospace - Evaluation of Particulate Contamination in Hydraulic Fluid - Membrane Procedure
- Aerospace Standard
- ARP4285A
- Current
Published 2018-08-13 by SAE International in United States
This SAE Aerospace Recommended Practice (ARP) establishes a method for evaluating the particulate matter extracted from the working fluid of a hydraulic system or component using a membrane. The amount of particulate matter deposited on the membrane due to filtering a given quantity of fluid is visually compared against a standard membrane in order to provide an indication of the cleanliness level of the fluid.
Aerospace Microscopic Sizing and Counting of Particulate Contamination for Fluid Power Systems
- Aerospace Standard
- AS598A
- Current
Published 2018-07-24 by SAE International in United States
This SAE Aerospace Standard (AS) defines the materials, apparatus and procedure for microscopic sizing and counting of particulate contamination of fluid power systems by membrane filtration using microscopic counting.
Bubble-Point Test Method
- Aerospace Standard
- ARP901B
- Current
Published 2017-04-04 by SAE International in United States
This test method describes a procedure for measuring the largest pore or hole in a filter or similar fluid-permeable porous structure. A standard referee test method for precise determination or resolution of disputes is specified. A simpler inspection test procedure for quality assurance “go-no-go” measurement is also given. Bubble-point testing physics, analysis of bubble-point test data, and correlation with other methods of pore size determination are separately discussed in the appendix.
Aerospace Microscopic Sizing and Counting of Particulate Contamination for Fluid Power Systems
- Aerospace Standard
- ARP598D
- Current
Published 2016-06-09 by SAE International in United States
This SAE Aerospace Recommended Practice (ARP) defines the materials, apparatus and procedure for sizing and counting of particulate contamination, 5 μm or greater, in hydraulic fluid samples by membrane filtration iwth microscopic counting.
Evaluating Effectiveness of Filter Element Cleaning Methods
- Aerospace Standard
- ARP725B
- Current
Published 2014-06-03 by SAE International in United States
This SAE Aerospace Recommended Practice (ARP) presents a procedure for evaluating cleaning methods with respect to contaminant removal and element degradation particularly for metallic filter elements. A procedure for checking durability of cleaning equipment and a referee cleaning method are also included. It is applicable only to the evaluation of cleaning methods proposed for removal of service dirt and not for built-in dirt, liquid oxygen (LOX) cleaning, etc. Supporting information for use with the ARP is also included.
Sensitization and Corrosion in Stainless Steel Filters
- Aerospace Standard
- AIR844B
- Current
Published 2014-02-06 by SAE International in United States
This document reviews briefly the subject of woven metal screens. Conditions that can promote damaging corrosion in stainless steel filter screens are discussed and recommendations are listed for minimizing corrosion damage. This is a general document only; for specific applications it is suggested that the reader refer to the technical literature, and selected references listed below.
Comparison of Hydraulic System Cleanliness Procedures and Requirements for Ten Aerospace Companies
- Aerospace Standard
- AIR1918A
- Current
Published 2013-12-13 by SAE International in United States
No Abstract Available.
Procedure and Method for Conducting Test of Hydraulic Components in Contamination Controlled System
- Aerospace Standard
- ARP219A
- Current
Published 2013-12-13 by SAE International in United States
This procedure will be generally applicable to three classes of hydraulic components as listed below:
Evaluating Effectiveness of Filter Element Cleaning Methods
- Aerospace Standard
- ARP725A
- Historical
Published 2013-10-08 by SAE International in United States
This SAE Aerospace Recommended Practice (ARP) presents a procedure for evaluating cleaning methods with respect to contaminant removal and element degradation particularly for metallic filter elements. A procedure for checking durability of cleaning equipment and a referee cleaning method are also included. It is applicable only to the evaluation of cleaning methods proposed for removal of service dirt and not for built-in dirt, liquid oxygen (LOX) cleaning, etc. Supporting information for use with the ARP is also included.
Aerospace - Dynamic Test Method for Determining the Relative Degree of Cleanliness of the Downstream Side of Filter Elements
- Aerospace Standard
- ARP599D
- Current
Published 2013-10-08 by SAE International in United States
This SAE Aerospace Recommended Practice (ARP) describes a procedure for determining the insoluble contamination level of the downstream side of filter elements. Results of this procedure represent the particulate released from the tested filter element under the prevailing conditions of the test. The results may be used for comparative evaluation of the effectiveness of various cleaning methods or the cleanliness of elements after cleaning or as received from manufacturers.