1、MIL-D-l7847E(SH) 29 September 1987 SUPERSEDING MIL-D-l7847D(SHIPS) 27 June 1966 (See 6.8) MILITARY SPECIFICATION DEHYDRATOR, DESICCANT, SEMI-AUTOMATIC, HIGH PRESSURE AIR This specification is approved for use within the Naval Sea Systems Command, Department of the Navy, and is available for use by a
2、ll Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers adsorptive purification and dehydra- tion equipment for removing solid contaminants and particulate and vaporous water and oil from shipboard high pressure air systems. used to denote the entire c
3、omplex of equipment throughout this specification. The word dehydrator will be 1.2 Classif ication. 1.2.1 Classes. Dehydrators shall be of the following classes, as specified (see 6.2). Class I Class II - 5000 lb/in2 gauge working pressure. - 3000 pounds per square inch (lb/in2) gauge working pres s
4、 Ure . 1.2.2 Ca acit . fied (see 6.d%dn practical, a unit with one of the following standard flow ratings should be selected. The required capacity of the dehydrator shall be as speci- (a) (b) (c) F-75 F-100 - 100 ft3/min minimum capacity. F-150 - 150 ft3/mn minimum capacity. - 75 standard cubic fee
5、t per minute (ft3/min) minimum capa city. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy, Washington, DC 20362-5101 by usi
6、ng the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 4460 DISTRIBUTION STATEMENT A Approved for public release; distribution unlimited I Provided by IHSNot for ResaleNo reproduction or networking permitted
7、 without license from IHS-,-,-MIL-D-178Y3E qrl m 999990b 0232ll33 5 MIIA-D-17847E(SH) 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. The following specifications and a dards form a part of this specification to the extent specified herein. Unless otherwise spec
8、ified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DoDICS) and supplement thereto, cited in the solicitation. SPECIFICATIONS FEDERAL QQ-N-288 QQ-S-7 63 MILITARY MIL-R- 19 6 MIL-S-901 MIL-E-91 7 MIL-S-2 94 0 MIL-
9、V-2961 MIL O -id al Q) O Lc P c 4 Fc s ib ido 9) Q) N Li P o m Li namely, working pressure, capacity, electrical data (for example voltage) dew point and oil content of influent and effluent air, and any other pertinent information. 13 Provided by IHSNot for ResaleNo reproduction or networking permi
10、tted without license from IHS-,-,-3.7.2 Identification plates. Identification plates in accordance with iri-?-l5024 and MIL-P-15024/5 shall be installed on the equipment. They shall be rely attached to a part of the equipment which will not be ordinarily renewed diiring normal service life. They sha
11、ll be located in a readily accessible posi- tion where they can be read at all times without danger to personnel. 3.7.3 Piping connections. Inlet and outlet air connections shall be designated. 3.7.4 Electrical and mechanical controls. Electrical and mechanical controls shall be suitably marked. 3.7
12、.5 instruction plate. An operating and safety instruction plate in accordance with MIL-P-15024 and MIL-P-15024/5 shall be provided to give the operator a clear, consise, step-by-step procedure for energizing the dehydrator and for shifting from one desiccant tower to another. It shall include operat
13、ion of the timer control and the control valves in conjunction with the various indi- cator lights. with the components identified therein. Any safety precautions required for safe operation and maintenance shall also be included. The instruction plate shall also include a schematic flow diagram 3.8
14、 Drawings. When the Government has limited rights in the data shown on these drawings as determined by the contractural provisions regarding rights in technical data, the drawings furnished herewith should be marked with the following restrictive legend: “Furnished under United States Government Con
15、tract No. . Shall not be either released outside the Government, or dupli- cated, or disclosed in whole or in part for manufacture or procurement, without the written permission of , except for: (a) emergency repair or overhaul work by or for the Government, where the item or process concerned is no
16、t otherwise reasonably available to enable timely performance of the work; or (b) release to a foreign government, as the interests of the United States may require; provided that in either case the release, use, duplication or disclosure hereof shall be subject to the foregoing limitations. This le
17、gend shall be marked on any reproduction hereof in whole or in part.“ Drawings which are sufficient to permit evaluation of 3.8.1 Bid drawings. the design and approval of materials shall be submitted as specified (see 6.3). The drawings shall show the following: I (a) Accurately scaled cross-section
18、al assembly and subassemblies which clearly depict the design and construction of the equipment . other data adequate to identify materials proposed. connections and location of mounts. Estimated dry weight and limitations on installation. Location of center of gravity. (b) Bill of material listing
19、specifications, grade, condition or (c) Outlined dimensions, disassembly space, location and size of end (d) (e) (f) Wiring diagrams and schematics. (g) Flow diagram. 14 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.8.2 Ship equipment drawing. Sh
20、ip equipment drawings shall be in accor- dance with DOWSTD-100 and DOD-D-1000. 3.8.2.1 Freliminary drawings. Preliminary drawings shall be submitted to The drawings the command or agency for approval prior to starting fabrication. shall include the information required by 3.8.1, and the following: (
21、a) Assembly and details of all piping components. “Form, fit, and function“ data shall be specified on the drawings. drawings shall show dimensions, finishes, concentricity, parallelism and squareness requireinents, material condition requirepwnts and all other information applicable to the manufact
22、ure and inspection of the part detailed. Detail (b) (c) Fabrication drawings depicting all pressure vessel, piping Assembly drawings of all other components. component, and piping welds. Welding and inspection proce- dures shall be specified on the drawings. Fabrication drawings listing welding and
23、inspection procedures for any other welded assembly which requires procedure approval as specified in MIL-STD-278. joints. Brazing and inspection procedures shall be specified on the drawings, and qualification test results submitted when required by NAVSHIPS 0900-LP-001-7000. (d) (e) Fabrication dr
24、awings depicting all pressure containing brazed 3.8.2.2 Final drawings. Final drawings shall include all changes required The by the drawings approved by the command or agency concerned and the information indicating validation by the command or agency concerned granting approval. drawings shall dep
25、ict the equipment actually furnished. 3.9 Manuals. Manuals shall be in accordance with type I of MIL-M-15071. The manuals shall contain all information necessary for installation, operation, and maintenance, and repair of the basic equipment and sub-components without the services of the manufacture
26、r. The format, extent of details and completeness shall be at least comparable to NAVSHIPS 0938-LP-013-5010, 3.10 Repair parts. accordance with MIL-P-15137. the following: On board and stock repair parts shall be furnished in On board and stock repair parts shall consist of Item Quant i ty Tirsmo.lO
27、O percent After filter elements.100 percent Temperature switch.lOO percent Gasket and seals200 percent Pre-filter element.lOO percent H.p. pressure switch. 50 percent Heating elePlt?nt. 1 each Desiccant.o. 1 recharge 3.10.1 Other repair parts as recommended by the supplier and approved by the comman
28、d or agency concerned shall also be included. 15 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.11 Special tools. If required, special tools or equipment shall be furn- ished for adjusting, disassembly and servicing of the unit. Special tools are
29、defined as those tools not listed in the Federal Supply Catalog (copies of this catalog may be consulted in the office of the Defense Contract Administration Services Management Area (DCASMA). 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contra
30、ct or purchase order, the contractor is responsible for the performance of all inspection requiraents as specified herein. in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless di
31、sapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. Except as otherwise specified 4.1.1 Responsibility for compl
32、iance. All items must meet all requirements of sections 3 and 5. a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of assuring that all products or supplies su
33、bmitted to the Government for acceptance comply with all requirements of the contract. Sampling in quality conformance does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to acceptance of defective material. The inspection set fort
34、h in this specification shall become 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: (a) (b) First article inspection (see 4.3). Quality conformance inspection (see 4.4). 4.3 First article inspection. One dehydrator of each class and capacit
35、y representing production equipment in all respects, shall be submitted to the U.S. Navy Marine Engineering Laboratory, Annapolis, Maryland for examination and test- ing to determine conformance to the requirements of this specification. inspection shall include and be in the following order: This (
36、a) Examination (see 4.5). (b) Hydrostatic test (see 4.6.4). (c) Air leakage test (see 4.6.5). (d) Performance test (see 4.6.1). (e) Vibration test (see 4.6.3). (f) Mechanical shock test (see 4.6.3). 4.3.1 Prior to submission of the dehydrator for first article inspection, the contractor shall perfor
37、m all necessary tests, including oil and dirt removal, hydrostatic, leakage and operating test (see 4.6.2, 4.6.4, 4.6.5, and 4.6.6) to insure that the design is sound and the dryer will meet the first article inspec- tion requirements. removed from the towers and filters as applicable. in separate p
38、ackages and in proper proportions for each use. The first article unit shall be shipped with the desiccant Desiccants shall be packaged 16 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.3.2 Waiver of first article inspection. A waiver of the first
39、 article inspection will be granted on subsequent orders for the same application and may be granted when the manufacturer has verifiable evidence that the dehydrator he proposes can meet the specified performance requirements, providing such evidence contains actual test, examination, or other veri
40、fiable quality data. No changes from the first article unit examined and tested will be acceptable without the approval of the command or agency concerned. 4.4 Quality conformance inspection. 4.4.1 - Lot. All dehydrators of the same class and capacity offered for delivery at one time under one contr
41、act or order shall be considered a lot for purposes of quality conformance inspection. 4.4.2 Sampling for examination and hydrostatic and leakage tests. A random sample of dehydrators shall be selected from each lot, in accordance with inspec- tion level II of MIL-STD-105, for the examination of 4.5
42、 and the tests of 4.6.4 and 4.6.5. The acceptable quality level (AQL) shall be 1.5 percent defective. For sample size 15 the acceptance number shall be zero, and for 25 it shall be one . 4.4.3 Sampling for operating test. All dehydrators offered for delivery, shall be subjected to the operating test
43、 specified in 4.6.6. 4.5 Examination. Each sample dehydrator selected in accordance with 4.4.2 Equipment shall be surface examined including shall be examined to determine conformance to the requirements of this specifi- cation and the approved drawings. visual examination for defects, workmanship,
44、dimensions and any other require- ments not involving tests. 4.6 Tests. 4.6.1 Performance test. - The complete dehydrator shall be assembled with all The operating period controls, indicators, dessicant, and accessory apparatus. It shall operate for 150 hours with normal operating pressure and rated
45、 capacity. shall include normal daily shutdown and startup, some of which shall be arranged to occur at intervals not coinciding with the start of a drying cycle. this test, all manual and automatic devices and all instruments shall be observed and operability shall be demonstrated. shall meet the r
46、equirements specified in 3.6.2. point shall be taken per hour. During During this test the drying performance . At least one measurement of dew 4.6.2 Oil and dirt removal test. Tests shall be conducted to determine the ability of the dehydrator to meet the oil and dirt removal requirement specified
47、in 3.6:2. The tesi installation shall consist of a closed system into which measured amounts of contaminants can be introduced. effluent air shall be used to determine the efficiency of purification. The sample collecting arrangement shall consist of filtering devices arranged in series, some having
48、 the capability of removing particulate matter down to 0.3 micrometers and other being able to adsorb vapors. Full flow sampling of 17 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.5.3 Vibration and shock test. bp0.i successful conclusion of the
49、tests s?ecified in 4.6.1 and 4.6.2, the dehydrator shall be tested for resistance to vibration in accordance with MIL-STD-167-1 and for resistance to shock in accor- dance with grade A, class I of MIL-S-901. During these tests, the unit shall be sabjected to hydrostatic (water) pressure equal to the normal operating pressure. After completion of these tests, and if examination reveals no serious damage, the unit shall be operated a sufficient leng
