SAE ARP 4946 pdf download
SAE ARP 4946 pdf download.Aerospace – Valves, Check, Hydraulic,Aircraft and Missile.
1.4 Standard Parts:
Check valves shall be furnished in the sizes specified on the applicable specification sheet. Standard parts shall be used wherever they are suitable for the purpose and shall be identified on the drawing by their part numbers. In the event there is no suitable corresponding standard part in effect, nonstandard/commercial parts may be used provided they conform to all requirements of this specification.
1.5 Specification Sheets:
The individual item requirements shall be as specified herein and in accordance with the applicable specification sheet. In the event of any conflict between the requirements of this recommended practice and the specification sheet, the latter shall govern.
2. APPLICABLE DOCUMENTS:
The following publications form a part of this document to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order. In the event of conflict between the text of this document and references cited herein (except for associated detail specifications or specification sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.
2.1 SAE Publications:
Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.
ARP24 Determination ol Hydraulic Pressure Drop
ARP6O3 Impulse Testing of Hydraulic Hose, Tubing, and Fitting Assemblies
ARP1185 Flexure Testing of Hydraulic Tubing Joints and Fittings
AS1241 Fluid, Fire Resistant, Phosphate-Ester Hydraulic Fluid for Aircraft
ARP13B3 Impulse Testing of Hydraulic Actuators, Valves, Pressure Containers and Similar Fluid System Components
AS4059 Aerospace – Cleanliness Classification for Hydraulic Fluids
AS4841 Fittings. 37° Flared, Fluid Connection
AS4941 Aerospace . General Requirements for Commercial Aircraft Hydraulic Components
AS5440 Hydraulic Systems, Aircraft, Design and Installation, Requirements for
AS8775 Hydraulic System Components. Aircraft and Missiles, General Requirements for
AMS-T-6845 Tubing Steel. Corrosion-Resistant (S30400), Aerospace Vehicle Hydraulic System, 1/8 Hard Condition
2.2 U.S. Government Publications:
Available from DODSSP. Subscription Services Desk, Building 4D. 700 Robbins Avenue, Philadelphia, PA 19111-5094.
MIL-F-18280 Fitting, Flareless Tube. Fluid Connection
MIL-PRF-83282 Hyd, Fluid, Fire Resistant, Synthetic Hydrocarbon Base, Metric. NATO Code No. H-537
MlL.F85421 Fitting, Tube, Fluid Systems. Separable, Dynamic Beam Seal, Requirements for MIL.-F•85720 Fitting, Tube, Fluid Systems, Separable, High Pressure Dynamic Beam Seal,
General Specification for
MIL-STD-129 Marting for Shipment and Storage
MIL-STD-1 30 Identification Marking
MIL-STD-810 Environmental Test Methods and Engineering Guidelines
2.3 FAR Publications from the FAA:
Available from the Federal Aviation Administration, 800 Independence Avenue, SW. Washington. DC
20591.
FAR Part 25 Federal Aviation Regulations Airworthiness Standards
2.4 Joint Aviation Authorities Committee Documents:
Available from the Civil Aviation Authority, Printing and Publications Services, Grenville House, Cheltenham, Glos. GL5O 2BN.
JAR Part 25 Transport Category Airplanes Joint Airworthiness Regulations
2.5 Radio Technical Commission for Aeronautics Documents:
Available from RTCA Secretariat, 44 Suite 500, 1425 K Street, Washington, DC 20005.
RTCA/DO-160 Environmental Conditions and Test Procedures for Airborne Equipment (Radio Technical Commission for Aeronautics)
3. REQUIREMENTS:
3.1 Qualification:
The valves furnished under this recommended practice snail be products wnicri have been tested and passed the qualification test specified herein.
3.2 General:
The requirements of AS8775 and AS4941 (as appropriate for the valves application) shall apply as requirements of this recommended practice, with the exceptions and additions specified herein. When this document and the applicable above referenced specifications conflict, this recommended practice shall govern.
3,3 Design and Construction:
3.3.1 Design: The design of the check valves shall be one that otters the least resistance to flow and minimum possible weight consistent with the requirements of this document and the applicable specification sheets.
3.3.2 Design Specification: Valves shall be of a design, construction, and physical dimensions as specified on the applicable specification sheets.
3.3.3 Materials: All metals used shall be corrosion resistant and shall be compatible with the hydraulic fluid approved by the procuring activity.
3.3.3.1 Aluminum Alloys: Aluminum alloys shall not be used in the construction of check valves of Class
5000 and above.
3.3.3.2 Nonmetals: All nonmetals including plastics, elastomenc materials, adhesives and protective finishes shall not be capable of supporting fungus growth and shall not be adversely affected by weathering. All nonmetals shall be compatible with the hydraulic fluid and temperatures specified by the procuring activity. Materials requiring age control are not recommended.
