Search Results

Standard

Secondary Filters for Fluid System Reliability

2004-12-01

HISTORICAL

AIR4057A

This SAE Aerospace Information Report (AIR) discusses the design choices and engineering trade-offs available to the system designer in the efficient selection and application of Last-Chance filters in contrast to main or primary system filters.

Standard

Secondary Filters for Fluid System Reliability

2012-09-24

CURRENT

AIR4057B

This SAE Aerospace Information Report (AIR) discusses the design choices and engineering trade-offs available to the system designer in the efficient selection and application of Last-Chance filters in contrast to main or primary system filters.

Standard

SECONDARY FILTERS FOR FLUID SYSTEM RELIABILITY

1994-05-01

HISTORICAL

AIR4057

It discusses the design choices and engineering trade-offs available to the system designer in the efficient selection and application of Last-Chance filters in contrast to main or primary system filters.

Standard

RECOMMENDED STANDARD FOR AEROSPACE FILTER ELEMENT FINE WIRE MESH

2011-02-11

HISTORICAL

AIR888

This AIR discusses the nature, method of manufacture and chemistry of fine wire meshes of the type used for filtration and similar applications, and how this information may be utilized in setting up a quality control program to insure reliability of meshes used for such applications.

Standard

Procedure for the Determination of Particulate Contamination of Air in Dust Controlled Spaces by the Manual Particle Count Method

2001-03-01

HISTORICAL

ARP743B

This SAE Aerospace Recommended Practice (ARP) describes two procedures for sampling particles in dust controlled spaces. One procedure covers airborne dust above 5 μm. The other (and newly added procedure) covers particles of 25 μm and larger that “fall out” of the environment onto surfaces. In each case the particles are sized in the longest dimension and counted. Airborne particles are reported as particles per cubic meter (cubic foot) whereas particles collected in fall out samples are reported as particles per 0.1 square meter (square foot). This document includes English units in parentheses as referenced information to the SI units where meaningful. These procedures may also be used for environmental analysis where the quality of the particles by visual or chemical analysis is intended.

Standard

PROCEDURE FOR THE DETERMINATION OF PARTICULATE CONTAMINATION OF AIR IN DUST CONTROLLED SPACES BY THE PARTICLE COUNT METHOD

1993-06-01

HISTORICAL

ARP743A

This method describes the procedure for (1) sampling air in contamination controlled spaces for air-borne particulate contamination 5μ or greater in size and for (2) the microscopic determination of the concentration and size range distribution of the particulate material removed from the air sample (Note 1).

Standard

PROCEDURE FOR THE DETERMINATION OF PARTICULATE CONTAMINATION IN HYDRAULIC FLUIDS BY THE CONTROL FILTER GRAVIMETRIC PROCEDURE

1963-02-01

HISTORICAL

ARP785

This procedure describes a gravimetric method for the determination of particulate contaminant in hydraulic fluids by the control filter technique. With this method detectable contamination levels down to 0.2 mg per sample can be obtained with a standard deviation of ± 0.1 mg.

Standard

PHYSICAL PROPERTIES OF HYDRAULIC FLUIDS

1991-11-01

HISTORICAL

AIR1362

This report presents data on hydraulic fluids which are of interest to detail designers of hydraulic systems and components for military flight vehicles. The data pertain to fluids conforming to specifications MIL-H-5606, MIL-H-8446, MIL-H-27601, and MIL-H-83282.

Standard

Methods for Evaluating Cryogenic Filters

2002-03-23

HISTORICAL

ARP900A

The purpose of this test procedure is to present test methods that can be utilized to evaluate the filtration and operating characteristics of filters that will be utilized in a cryogenic system. The methods presented herein are intended to supplement standard filter testing specifications to allow evaluation of filter performance characteristics in areas that could be affected by extreme low temperatures. The test methods can be utilized to evaluate filters up to and including 60 gpm (230 lpm) capacity. If higher flow rate filters are to be evaluated in accordance with the test methods presented herein, it will be necessary to increase the system flow capacity and the size of effluent sampling system.

Standard

Methods for Evaluating Cryogenic Filters

2011-12-19

HISTORICAL

ARP900B

The purpose of this document is to present test methods that can be utilized to evaluate the filtration and operating characteristics of filters that will be utilized in a cryogenic system. The methods presented herein are intended to supplement standard filter testing specifications to allow evaluation of filter performance characteristics in areas that could be affected by extreme low temperatures. The test methods can be utilized to evaluate filters for particle sizes equal to or greater than 5.0 μm and flows up to and including 60 gpm (230 L/min) capacity. If higher flow rate filters are to be evaluated in accordance with the test methods presented herein, it will be necessary to increase the system flow capacity and the size of effluent sampling system from those recommended in this document.

Standard

Methods for Evaluating Cryogenic Filters

2019-12-03

CURRENT

ARP900C

The purpose of this document is to present test methods that can be utilized to evaluate the filtration and operating characteristics of filters that will be utilized in a cryogenic system. The methods presented herein are intended to supplement standard filter testing specifications to allow evaluation of filter performance characteristics in areas that could be affected by extreme low temperatures.

Standard

METHODS FOR EVALUATING CRYOGENIC FILTERS

1975-07-01

HISTORICAL

ARP900

The purpose of this test procedure is to present test methods that can be utilized to evaluate the filtration and operating characteristics of filters that will be utilized in a cryogenic system. The methods presented herein are intended to supplement standard filter testing specifications to allow evaluation of filter performance characteristics in areas that could be affected by extreme low temperatures. The test methods can be utilized to evaluate filters up to and including 60 GPM (330 liters per minute) capacity. If higher flow rate filters are to be evaluated in accordance with the test methods presented herein, it will be necessary to increase the system flow capacity and the size of effluent sampling system.

Standard

Liquid Filter Ratings, Parameters and Tests

2021-04-29

CURRENT

AIR887C

This SAE Aerospace Information Report (AIR) identifies and explains the meaning of various ratings and terms used to describe the physical characteristics of liquid filter elements. The significance of various filter parameters is discussed. In addition, a number of filter test methods are briefly described. This AIR and the data presented are only applicable where the system liquid wets the filter elements.

Standard

LIQUID FILTER RATINGS, PARAMETERS AND TESTS

1993-02-03

HISTORICAL

AIR887B

This SAE Aerospace Information Report (AIR) identifies and explains the meaning of various ratings and terms used to describe the physical characteristics of liquid filter elements. The significance of various filter parameters is discussed. In addition, a number of filter test methods is briefly described. This AIR and the data presented are only applicable to filters in which the system liquid wets the filter elements. This document includes equivalent metric units (in parentheses) as referenced information.

Standard

LIQUID FILTER RATINGS, PARAMETERS AND TESTS

2011-08-10

HISTORICAL

AIR887A

This AIR identifies and explains the meaning of various ratings and terms used to describe the physical characteristics of liquid filter elements. The significance of various filter parameters are discussed. In addition, a number of filter test methods are briefly described. This AIR and the data presented are only applicable to filters in which the system liquid wets the filter elements.

Standard

LIQUID FILTER RATINGS

1968-05-31

HISTORICAL

AIR887

This AIR explains the meaning of "ABSOLUTE" and "NOMINAL" ratings which are used to describe liquid filter element physical characteristics. A set of standard filter ratings and methods of determination to further describe an element performance are also included. These data are only applicable to a system in which the system liquid wets the filter element.

Standard

Fire Resistant Phosphate Ester Hydraulic Fluid for Aircraft

1997-09-01

HISTORICAL

AS1241C

This document establishes the requirements for physical and chemical properties and the minimum tests to evaluate suitability of phosphate ester hydraulic fluids for use in aircraft systems where fire resistance is required. Additional tests may be specified by procuring agencies to demonstrate compliance with specific requirements.

Standard

Fire Resistant Phosphate Ester Hydraulic Fluid for Aircraft

2021-07-20

WIP

AS1241E

This document establishes the requirements for physical and chemical properties and the minimum tests to evaluate suitability of phosphate ester hydraulic fluids for use in aircraft systems where fire resistance is required. Additional tests may be specified by the qualifying agency to demonstrate compliance with their specific requirements. The "qualifying agency" will be defined herein to be the airframe manufacturer submitting certification approval for use of the fluid in a specific model airplane. Fluids meeting the requirements of this specification may be approved by a qualifying agency for use on specific airplane models. Data used to show compliance to this specification can be used by the qualifying agency to show compliance to the applicable regulations for the appropriate certifying authority; e.g., FAA, EASA, etc.

Standard

Fire Resistant Phosphate Ester Hydraulic Fluid for Aircraft

2016-09-16

CURRENT

AS1241D

This document establishes the requirements for physical and chemical properties and the minimum tests to evaluate suitability of phosphate ester hydraulic fluids for use in aircraft systems where fire resistance is required. Additional tests may be specified by the qualifying agency to demonstrate compliance with their specific requirements. The "qualifying agency" will be defined herein to be the airframe manufacturer submitting certification approval for use of the fluid in a specific model airplane. Fluids meeting the requirements of this specification may be approved by a qualifying agency for use on specific airplane models. Data used to show compliance to this specification can be used by the qualifying agency to show compliance to the applicable regulations for the appropriate certifying authority; e.g., FAA, EASA, etc.

Standard

Fine Wire Mesh for Filter Elements

2002-11-14

HISTORICAL

AIR888B

This SAE Aerospace Information Report (AIR) discusses the terminology, types, method of manufacture and chemistry of the fine wire meshes used for filtration of hydraulic, lubrication fuel systems, and similar applications. Information contained herein may be used for quality assurance testing to insure that a high performance filter grade wire mesh is acceptable for use in an aerospace application.