1、MIL-I-24739A 42 9999906 0477007 3 M I INCH-POUNDI MIL-I-24739A(SH) 12 April 1991 SUPERSEDING 17 August 1990 (See 6.6) MIL-I-24739(SH) I MILITARY SPECIFICATION INFLATION ASSEMBLY, AUTOMATIC/MANUAL, LIFE PRESERVER This specijkation is approved for use by the Naval Sea Systems Command, Department of th
2、e Navy, and is available for use by all Depai-tment and Agencies of the Department of Defense. i. SCOPE 1.1 Scope. This specification covers requirements for an automatic inflation assembly with a manual override for various types of life preservers. 2. APPLICABLE DOCUmNTS 2.1 Government documents.
3、2.1.1 Specification and standards. The following specifications and standards form a part of this document to the extent specified herein. Uniess otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODIS
4、S) and supplement thereto, cited in the solicitation (see 6.2). 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
5、, DC 20362-5101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC NIA FSC 4220 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproductio
6、n or networking permitted without license from IHS-,-,-MIL-I-24739A 42 m 7999906 O477008 5 W SPECIFICATIONS FEDERAL PPP-B-566 PPP-B-601 PPP-B-621 PPP-B-636 PPP-B-676 PPP-c-795 QQ-W-343 MILITARY MIL-P-116 MIL-B-117 MIL-R-6855 MIL-C-25369 STANDARDS FEDERAL FED-STD-H28 MILITARY MIL-STD-129 MIL-STD-130
7、MIL-STD- 167- 1 MIL-STD-810 MIL-STD-889 MIL-STD-1385 Boxes, Folding, Paperboard Boxes, Wood, Cleated-Plywood Boxes, Wood, Nailed and Lock Corner Boxes, Shipping, Fiberboard Boxes, Setup Cushioning Material, Packaging (Flexible Cellular, Plastic Film) for Packaging Applications Wire, Electrical, Copp
8、er (Uninsulated) Preservation, Methods of Bags, Sleeves and Tubing Rubber, Synthetic, Sheets, Strips, Molded or Extruded Shapes, General Specification for Cylinders, Carbon Dioxide, for Inflation of Pneumatic Life Preservers Screw Thread Standards for Federal Service Marking for Shipment and Storage
9、 Identification Marking of US Military Property Mechanical Vibrations of Shipboard Equipment (Type I - Environmental and Type II - Internally Excited) Environmental Test Methods and Engineering Guidelines Dissimilar Metals Preclusion of Ordnance Hazards in Electromagnetic Fields; General Requirement
10、s for (Unless otherwise indicated, copies of federal and military specifications and standards are available from the Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without li
11、cense from IHS-,-,-U - MIL-I-24739A 42 9999c106 047.7009 7 m 2.1.2 Other Government documents, drawings, and publications, The following other Government documents, drawings, and publications, form a part of this document to the extent specified herein. Unless otherwise specified, the issues are tho
12、se cited in the solicitation. , DRAWINGS NAVAL SEA SYSTEMS COMMAND (NAVSEA) 80064-803-2482705 Life Preserver Vest MIU Main Assembly (Copies of the drawings are available from Defense Construction Supply Center, (AT“: DCSC-SDRL) PO Box 3990, Columbus, OH 43215.) PUBLICATIONS NAVSEA S9310-AQ-SAF-O10 T
13、echnical Manual for Batteries, Navy Lithium Safety Program Responsibilities and Procedures (Copies of this publication are available from the Standardization Documents Order Desk, Catalog No. 0190-LP-128-4800, Building 4D, 700 Robbins Avenue, Philadelphia, PA 191 11-5094.) 2.2 Non-Government publica
14、tion. The following documents form a part of this document to the extent specified herein, unless otherwise specified, the issues of these documents which are DOD adopted are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto,
15、 cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM D3951 Standard Practice for Commercial Packaging (Application for copie
16、s should be addressed to the American Society for Testing and Materials 1916 Race Street, Philadelphia, PA 19103-1137.) (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. These documents also may be available in or
17、 through libraries or other informational services.) 2.3 Order-of-precedence, In the event of a conflict between the text of this document and the references cited herein, (except for related associated detail specifications, specification sheets, 3 Provided by IHSNot for ResaleNo reproduction or ne
18、tworking permitted without license from IHS-,-,-MIL-I-24739A(SH) or MS standards), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. WQUIREMENTS 3.1 First article. When specified
19、 (see 6.2), a sample or samples shall be subjected to first article inspection (see 6.4) in accordance with 4.3. 3.2 Materials and components. 3.2.1 Metals. Metals shall be corrosion resistant or shall be protected to resist corrosion due to salt spray or any other environmental conditions to which
20、this inflation assembly might be subjected during normal service life. 3.2.2 Dissimilar metals. Dissimilar metals, as defined in MIL-STD-889, shall not be used in intimate contact with each other unless protected against electrolytic corrosion by protective coatings. 3.2.3 Nonmetallic materials, All
21、 age dated nonmetallic materials used in construction of the inflation assembly shall not have been manufactured more than 24 months prior to the date of delivery except for rubber products which shall have a cure date not more than 12 months prior to. Certificates of compliance shall be provided fo
22、r all age dated nonmetallic materials (see 6.3). 3.2.4 Copper shear wire. 22AWG, drawn and annealed. The copper shear wire shall conform to QQ-W-343, type S, 3.2.5 Rubber gaskets. Three rubber gaskets conforming to MIL-R-6855, class 2, GR. 80 shall be provided, one on each end of the manifold seatin
23、g areas and one for the cylinder seating area. 3.2.6 Lanyard assembly. The lanyard shall have a 100 pound tensile strength and contain a pull knob secured to the end. The lanyard shall measure 6 1/2 -L 1/2 inch from the center of the D-hole (manifold mounting hole) to the end of the lanyard assembly
24、. 3.2.7 Power supply. The power supply shall have a minimum shelf life of 3 years and be delivered with a remaining/functional shelf life of two (2) years, and be easily replaceable by the user. The installed power supply shall not react adversely by exposure to lake or seawater. Mercury or mercuric
25、 compounds shall not be used in the power supply. Power supplies containing lithium must meet the safety requirements detailed in the exemption section of “Technical Manual for Batteries, Navy Lithium Safety Program Responsibilities and Procedures“ (S9310-AQ-SAF-010) Chapter 1, paragraph 1-lb, or pa
26、ss all safety and performance test requirements cited in Chapter 2, of subject Technical Manual. 3.2.8 Piercing pin. Each body shall contain a piercing pin fabricated fi-om suitable steel 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-24739A
27、 42 = 9999906 04770LL 5 material. The piercing pin, when activated, shall pierce the puncturable area of the carbon dioxide filled cylinder, thereby releasing the carbon dioxide and permitting it to flow, without leakage, into the manifold stem and life preserver. The point of the piercing pin shall
28、 travel beyond the upper surface of the seat seal gasket and shall fully puncture the carbon dioxide filled cylinder., 3.2.9 Manual activation device. Each inflation assembly shall contain a lever or mechanical device, fabricated from suitable material, for manual activation. The device shall be sec
29、ured by copper shear wire. In the unoperated position, if a lever is used, the lever shall lay against the side of the body and shall not exceed two (2) inches. The design of the device shail be compatible for use with a manifold conforming to drawing 803-242705. A single strand of soft, uncoated, c
30、opper wire, conforming to QQ-W-343, type S, shall secure the lever to the body. 3.2.10 Body. The body shall be fabricated from a high impact, shock resistant material and shall be free from blow-holes, porosity, cracks, or other defects. Each body shall have internal threads 1/2-20 UNF-2B conforming
31、 to FED-STD-H28, for use with carbon dioxide cylinders conforming to MIL-C-25369, type II. The opening in the body shall contain a chamfered portion and shall be so designed to permit the top area of the carbon dioxide (CO,) filled cylinder to seat firmly against the seat of the body. The seat shall
32、 be smooth, flat, and perpendicular to the threads. The body shall contain a gas passage and a means to mount assembly on the manifold stem conforming to NAVSEA Drawing 803-2482705. 3.2.11 Recovered materials. Unless otherwise specified herein, all equipment, material, and articles incorporated in t
33、he products covered by this specification shall be new and may be fabricated using materials produced from recovered materials to the maximum extent practicable without jeopardizing the intended use. The term “recovered materials“ means materials which have been collected or recovered from solid was
34、te and reprocessed to become a source of raw materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean that the use of used or rebuilt products is allowed under this specification unless otherwise specifically specified. 3.3 General description, The automatic/manu
35、al inflation assembly shall be an actuation mechanism designed to operate automatically and manually when properly attached to inflation manifold conforming to NAVSEA drawing No. 803-2482705. It shall be designed to accept a CO, Cylinder conforming to MILC-25369, type II. The manual activation devic
36、e shall be actuated by a lanyard and knob assembly. 3,4 Design. The inflation assembly shall consist of a body with a seat seal gasket for use with a carbon dioxide cylinder, an outlet with gas passage, a manual activation device with a lanyard, a piercing pin, and a water activated initiator device
37、. The inflation assembly shall automatically activate within 3 seconds when fully immersed in lake or seawater having a conductivity of 100 +50/-10 microsiemens ($3) and higher which causes the piercing pin to move forward, puncturing the carbon dioxide filled cylinder, releasing the gas, and thereb
38、y, inflating the preserver. Each inflation assembly shall complete ten (10) consecutive manual operations. After each manual 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-24739A 42 9999906 0477032 7 MILI-24739A( SH) operation the procedure
39、for resetting the assembly shall be limited to returning the manual activation device to the original position, replacing the shear wire, and installing a new CO, cylinder. The capability for an inflation assembly with multiple automatic operations is acceptable only if the reset procedures do not r
40、equire any disassembly of the inflation assembly and has a positive means of verification of resetting. Assemblies that do not have multiple automatic operation capability shall be so designed that after automatic operation the assembly is unable to be reset to prevent the possibility of deployment
41、of an assembly which no longer has automatic operating capability. 3.4.1 Dimensions, Length - of the assembly shall be measured along an axis that is parallel to the flat side of the manifold D-hole. - length including the CO, cylinder, when measured from the center of the D-hole shall not exceed 7
42、inches. - length from center of manifold D-hole to either edge shall not exceed 2 inches. Width - from center of inflation manifold D-hole to either edge shall not exceed 1 1/4 inches. Height - shall not exceed 1 1/8 inch. 3.4.2 Weight. The inflation assembly without CO, cylinder shall weigh no more
43、 than 11 ounces (o=) (311.8 Grams). 3.5 Performance. 3.5.1 Piercing pin. When inspected as specified the piercing pin shall not puncture a filled CO, cylinder when fully installed by hand (see 4.6.1). 3.5.2 Manual operation with the carbon dioxide filled cylinder. For this test, the inflation assemb
44、ly shall be installed on an inflation manifold conforming to 803-2482705. The piercing pin of the inflation assembly shall advance to its maximum point of travel and shall pierce the puncturable area of an installed carbon dioxide filled cylinder conforming to MIGC-25369, type II, when inspected as
45、specified with a maximum load of 15 pounds attached to the free end of the lanyard. The CO, cylinder shall be fully discharged within ten (10) seconds. The gas shall not pass through any part of the inflation assembly into the atmosphere other than through the gas passages in the outlet. The carbon
46、dioxide filled cylinder, when fully inserted with hand tightening, may make contact with the point of the piercing pin, but the cylinder shall not be punctured. The inflation assembly shall then conform to the requirements for the automatic operation of 3.5.4 (see 4.6.2). 6 Provided by IHSNot for Re
47、saleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-24737A 42 W 9799906 0477033 7 3.5.3 Repeated manual operation with the carbon dioxide filled cylinder. The inflation assembly shall be capable of completing ten (10) consecutive manual operations as described in 3.5.2, fo
48、llowed by one (1) automatic actuation conforming to the requirements of 3.5.4. It is acceptable to warm inflation assembly back up to room temperature between activations (see 4.6.3). 3.5.4 Automatic operation. When inspected as specified, the piercing pin of the inflation assembly shall advance to
49、its maximum point of travel and shall pierce the puncturable area of an installed carbon dioxide filled cylinder conforming to MIL-C-25369, type II, in a maximum time of 3.0 seconds. The CO, cylinder shall be fully discharged within a total of ten (10) seconds. The gas shall pass through the gas passages in the outlet into the life preserver carbon dioxide compartment and shall not pass through any part of the infiation assembly into the atmosphere. The products re
