1、The Engineering Society For Advancing Mobility Land Sea Air and Space I N T E R N A T I O N A L400 Commonwealth Drive, Warrendale, PA 15096-0001AEROSPACESTANDARDCopyright 1992 Society of Automotive Engineers, Inc.All rights reserved.Printed in U.S.ASAE Technical Standards Board Rules provide that: “
2、This report is published by SAE to advance the state of technical andengineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use ,including any patent infringement arising therefrom, is the sole responsibility of the user.”SAE revi
3、ews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invit esyour written comments and suggestions.Submitted for recognition as an American National StandardAS1607Issued 12-15-81Revised 1992-05-08VALVE, STARTER CONTROL, PNEUMATIC, AIRCRAF
4、T ENGINE GENERAL SPECIFICATION FOR1.SCOPE:1.1Scope:This specification covers the general requirements for pneumatic control valves for use with the starters on aircraft gas turbine engines.This specification shall be used in conjunction with AS943, ARP949, and AIR1639.1.2Classification:Pneumatic sta
5、rter control valves shall be one of the following two types:a.Type I: Regulating (pressure)b.Type II: Nonregulating (on-off)The type will be assigned by the procuring activity in accordance with MIL-STD-875 and shall bespecified in the model specification.2.REFERENCES:The following documents, of the
6、 issue in effect on date of invitation for bids or request for proposals, form a part of this specification to the extent specified herein:2.1SAE Publications:Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.AS943 Starter, Pneumatic, Aircraft Engine, General SpecificationARP949
7、Turbine Engine Starting System Design RequirementsAIR1639 Safety Criteria for Pneumatic Starting SystemsREV.ASAE AS1607 Revision A- 2 -2.2U.S. Government Publications:Available from Standardization Documents Order Desk, Building 4D, 700Robbins Avenue, Philadelphia, PA 19111-5094.MIL-P-116 Preservati
8、on-Packaging, Method ofMIL-B-5087 Bonding, Electrical, and Lightening Protection for Aerospace SystemsMIL-E-7080 Electric Equipment, Aircraft, Selection and Installation ofMIL-P-7105 Pipe Threads, Taper, Aeronautical National Form, Symbol ANPT, GeneralRequirements forMIL-S-7742 Screw Threads, Standa
9、rd, Optimum Selected Series; General Specification forMIL-I-8500 Interchangeability and Replaceability of Component Parts for Aircraft and MissilesMIL-S-8516 Sealing Compound, Polysulfide Rubber, Electric Connectors and Electrical Systems,Chemically CuredMIL-A-8625 Anodic Coatings, for Aluminum and
10、Aluminum AlloysMIL-S-8879 Screw Threads, Controlled Radius Root with Increased Minor Diameter, GeneralSpecification forMIL-S-23586 Sealing Compound, Electrical, Silicone Rubber, Accelerator RequiredMIL-I-81550 Insulating Compound, Electrical, Embedding, Reversion Resistant SiliconeMIL-STD-129 Markin
11、g for Shipment and StorageMIL-STD-130 Identification Marking of US Military PropertyMIL-STD-453 Inspection, RadiographicMIL-STD-454 Standard General Requirements for Electronic EquipmentMIL-STD-461 Electromagnetic Emission and Susceptibility Requirements for the Control ofElectromagnetic Interferenc
12、eMIL-STD-462 EMI Characteristics, Measurement ofMIL-STD-470 Maintainability Program Requirements (For Systems and Equipment)MIL-STD-480 Configuration Control - Engineering Changes, Deviations and WaiversMIL-STD-490 Specification PracticesMIL-STD-704 Aircraft Electric Power RequirementsMIL-STD-794 Pa
13、rts and Equipment, Procedures for Packaging and Packing ofMIL-STD-810 Environmental Test Methods and Engineering GuidelinesMIL-STD-831 Test Reports, Preparation ofMIL-STD-875 Type Designation System for Aeronautical and Aeronautical Support EquipmentMIL-STD-889 Dissimilar MetalsMIL-STD-970 Standards
14、 and Specifications, Order of Precedence for the Selection ofMIL-STD-1523 Age Control of Age Sensitive Elastomeric Material (for Aerospace Applications)MIL-STD-1595 Qualification of Aircraft Missile and Aerospace Fusion and WeldersMIL-STD-1949 Inspection Process, Magnetic ParticleSAE AS1607 Revision
15、 A- 3 -2.2(Continued):MIL-C-2175 Castings, Classification and Inspection of (For Aeronautical Applications)MIL-STD-6866 Inspection Liquid PenetrantMIL-STD-8706 General Specification for Design Examinations, Engineering, Aircraft Weapon SystemsDOD-STD-100 Engineering Drawing PracticesMS 20995 Wire, S
16、afety or LockMS 33540 Safety Wiring, and Cotter Pinning, General Practices forMS 33588 Nut, Self-Locking, Aircraft, Reliability and Maintainability Usage RequirementsFORM 1423 CDRLREPORT #217 FAA Technical Report2.3Definitions:The applicable definitions and symbols used herein and in the model speci
17、fication are as specified below:2.3.1PROCURING ACTIVITY:The procuring activity is responsible for the valve contract.2.3.2PROOF PRESSURE:Proof pressure is that internal pressure to which all high pressure valve partsare pressure tested to prove their structural integrity without causing damage.2.3.3
18、MINIMUM BURST PRESSURE:Minimum burst pressure is the greatest applied internal pressure towhich the valve can be subjected before ultimate strength of the valve is exceeded.2.3.4TRANSFER TIME:Transfer time is the time interval from the removal of the valve or component fromone conditioning chamber t
19、o the insertion of the valve or component into another conditioning chamber, or the time interval from the removal of the valve or component from the conditioning chamber to theinitiation of testing.2.3.5RATING:A rating is the value of some characteristic of performance as specified in the modelspec
20、ification. The valve shall be rated at that condition at which its associated starter is rated unless otherwise specified by the procuring activity. This is typically APU standard day sea level operatingconditions.2.3.6MODEL SPECIFICATION:The model specification referred to herein is defined as the
21、valve supplierprepared document used to define a particular valve.2.3.7DETAIL SPECIFICATION:The detail specification referred to herein is defined as a procuring activityprepared document used to define the applicable design and performance parameters required for a particular valve application.SAE
22、AS1607 Revision A- 4 -2.4Symbols:The units for these symbols are defined herein:a.G: Gravitational constantb.T: Temperaturec.Wv: Total weight of the valved.P: Pressure3.REQUIREMENTS:3.1Preproduction:This specification makes provisions for preproduction testing.3.2Model Specification and Data Submitt
23、al:When specified in the procurement contract, a valve model specification conforming to the outline and instructions for preparation specified herein, shall be prepared by the valve supplier and submitted bycontractor to the procuring activity for approval (see 2.3.6 and 6.2). The model specificati
24、on shall provide all the necessary information to completely describe the starter control valve for one system application.Approval of the model specification is required prior to initiation of preproduction and quality conformance testing. Changes and revisions to the model specification shall be i
25、n accordance with MIL-STD-490.a. The headings and numbering of sections and paragraphs in the model specification shall correspond to those in this specification. Specific data required by this specification and such other additional dataas may be required to completely describe the unit shall be in
26、cluded in the model specification.Omission of reference in the model specification to a particular requirement of this specification by themanufacturer shall be interpreted as compliance therewith. When departures from the requirementsof this specification are necessary, the details of such departur
27、es shall be stated as specificrequirements bearing the same section, paragraph heading, and numbering as in this specification.b. All applicable documents shall be listed in numerical order in Section 2 of the model specification.c. All curves shall be presented on graph paper having an adequate num
28、ber of subdivisions to permiteasy interpolation.d. Definitions and Symbols - Terms, their definitions, and symbols used in the model specification shallbe in accordance with Section 2 herein.3.2.1Detail Specification: Requirements for individual items shall be as specified herein and shall be inacco
29、rdance with the applicable detail specification (see 2.3.7) for the system.SAE AS1607 Revision A- 5 -3.2.2Valve Data Submittal and Approval: Valve data submittal and approval requirements for a specificmodel aircraft will be covered by a contract with the appropriate procuring activity. Typical info
30、rmation and data required are listed in 6.2. The data shall be furnished in accordance with MIL-STD-8706 or in accordance with the appropriate line items of the Contractor Data Requirement list (DD Form 1423), as applicable.3.3Mockup:A full-scale mockup shall be prepared for examination and aircraft
31、 installation suitability as soon as the contractor has established the necessary design features of the valve. Prior to initiation of thepreproduction testing, the mockup shall be installed on the aircraft for which the design was finalized to demonstrate satisfactory fit and installation features.
32、 Examination shall be at the option of the procuringactivity.3.3.1Changes:Changes to the valve features requiring changes in the vehicle or ground supportequipment made after approval of the mockup shall be submitted to the procuring activity for approval in accordance with MIL-STD-480. Any changes
33、required by the procuring activity shall be subject tonegotiation as provided in the contract. Unless otherwise authorized, the mockup shall be kept current with approved changes at least through the first production contract.3.4Components:Normally, the complete valve shall consist of a valve body a
34、ssembly which includes a mechanism (such as butterfly) for controlling airflow through the valve, a pressure regulating or on-off actuating power device, and a solenoid-operated pilot valve for control of the actuator.3.5Selection of Specifications and Standards:Specifications and standards for nece
35、ssary items and services not specified herein shall be selected according to MIL-STD-970.3.6Materials:3.6.1Metals:Metal parts shall be of the corrosion-resistant type or suitably treated to resist corrosion due tocombustion gases or residue, or atmospheric conditions likely to be met in storage or s
36、ervice use. Anycorrosion resistant protective coating applied shall provide maximum protection against cracking,chipping, or scaling of the coating with age, use, or extremes of atmospheric conditions.3.6.1.1Dissimilar Metals: Unless protected against electrolytic corrosion, dissimilar metals shall
37、not be usedin contact with each other. Dissimilar metals are defined in MIL-STD-889.3.6.2Nonexpendable Metal Parts:Nonexpendable metal parts may be reworked and reused as agreedbetween the procuring activity and the contractor, if such parts comply with specifications and drawings in all respects.SA
38、E AS1607 Revision A- 6 -3.6.3Synthetic Rubber Parts:Age of synthetic rubber parts shall be controlled in accordance withMIL-STD-1523.3.6.4Castings:Castings shall be in accordance with MIL-C-2175.3.6.5Potting Compounds:Requirement 47 of MIL-STD-454 shall be adhered to for encapsulation andembedment.
39、Only those materials that meet the requirements of MIL-S-8516, MIL-S-23586, orMIL-I-81550 shall be used.3.6.6Organic Materials:Materials that are nutrients for fungi shall not be used where it is practical to avoidthem. Where used, they shall be treated with a suitable fungicidal agent.3.7Design and
40、 Construction:The valve shall be designed for operational use with a specific pneumatic energy source, and shall be compatible with the starter in a specific application (see AS943). The design shall be amendable toproduction processing methods. The valve shall be constructed to withstand the strain
41、s, jars, vibrations, and other conditions incident to shipping, storage, installation, and service usage. The pneumatic energy sources shall be defined in the detail specification and model specification.3.7.1Special Features:3.7.1.1Failsafe Features:The valve shall be designed to automatically clos
42、e in the event of loss ofelectrical power or pneumatic energy source.3.7.1.2Other Features:Manual override, remote position indication, and other such features shall bespecified in the detail specification.3.7.1.3Installation:The valve shall incorporate features to preclude installing the valve in t
43、he oppositeairflow direction from that intended.3.7.2Reliability and Maintainability:3.7.2.1Reliability:The valve manufacturer shall prepare, as part of the model specification, a reliabilityanalysis predicting the confidence level and reliability factor based on a one-cycle mission.MIL-STD-470 shou
44、ld be used as a guide. Demonstration of the predicted reliability factors shall bespecified in the contract with the procuring activity. Factors to be considered during the design and manufacture of the valve to assure in-service reliability are:a. Simplicity of designb. Selection and application of
45、 reliable componentsc. Consideration of operational and environmental parametersd. Mechanical structures - adequate design stress margin on all partse. Design review by technical specialists prior to drawing releasef. Use of proven manufacturing techniquesg. Rigid quality control procedures imposed
46、throughout procurement, manufacturing, assembly, andtesting to assure the maximum design reliability is built into the equipmentSAE AS1607 Revision A- 7 -3.7.2.2Maintainability:The valve design shall permit easy assembly, disassembly, location of troublesources, routine service checking, adjustment,
47、 and maintenance with tools and equipment normally available commercially, by service maintenance personnel with a minimum of training. Maintenance between overhaul periods shall be held to an absolute minimum.3.7.3Flight and Ground Loading Conditions:The valve shall withstand, without permanent def
48、ormation orfailure, the largest forces resulting from ground loading conditions and the largest forces resulting from all critical combinations of maximum flight maneuver conditions specified in the detail specification,acting in any direction through the center of gravity of the valve. In addition,
49、 unless otherwise specified, the valves air inlet connecting flanges shall be capable of withstanding, without permanent deformation or failure, a force of 222 N (50 lb) acting in any direction around the axial centerline of the flange.3.7.4Threads:3.7.4.1Straight Screw Threads:All conventional straight screw threads shall conform to the requirementsof MIL-S-8879 Classes 3A or 3B. The use of MIL-S-7742 is optional for threads used for:a. Electrical connectionsb. Screw threads 3.5 mm (0.138 in) diameter and smallerc. Interference fits and other applications where MIL-S-7742 threads are
