1、 MIL-PRF-27639D 9999906 2037005 951 = I INCH-POUND I MIL-PRF-27639D 20 JUNE 1997 SUPERSEDING 18 September 1970 MIL-L-27639C (USAI?) PERFORMANCE SPECIFICATION VALVE, PNEUMATIC INFLATOR (LIFE PRESERVER, FLU-lA/P) This specification is approved for use by all Departments and Agencies of the Department
2、of Defense. 1. SCOPE 1.1 Scope. This specification covers one type of pneumatic inflator valve (life preserver, FLU-lA/P). 2. APPLICABLE DOCUMENTS 2.1. General. The documents listed in this section are cited in sections 3 and 4 of this specification. These lists do not include documents cited in oth
3、er sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of these lists, document users are cautioned that they must meet all specified requirements documents cited in sections 3 and 4 of this specificatio
4、n, whether or not they are listed. 2.2 Government documents. 2.2.1 this document to the extent specified herein. Unless otherwise specified, the applicable issues of these documents are those listed in the specific issue of the Deparbrient of Defense Index of Specifications and Standards (DoDISS) an
5、d supplement thereto, cited in the solicitation (see 6.2). Specifications and standards. The following specifications and standards form a part of Beneficial comments (recommendations, additions, deletions) and any pertinent data that may be of use in improving this document should be addressed to:
6、RESOURCES & LOGISTICS KELLY AFB TX 78241-5916, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC NIA FSC 4220 SERVICES DMSION, SA-ALCITILDD, 485 QUENTIN ROOSEVELT DRIVE BLDG 171, DISTRIBUTION STATEMENT A. Approved for p
7、ublic release: distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-PRF-27639D 9999906 2037006 898 MIL-PRF-2763 9D SPECIFICATIONS DEPARTMENT OF DEFENSE MIL-PRF-25 3 69 Cylinders, Carbon Dioxide, For the Inflation of Pneumat
8、ic Life Preservers (Unless otherwise indicated, copies of the above specification are available from the DEFENSE AUTOMATED PRINTED SERVICE PAPS), BLDG 4-D PM-DODSSP), 700 ROBBINS AVENUE, PHILADELPHIA PA 19 1 1 1-5094) 2.3 Non-Government publications. The following document(s) form a part of this doc
9、ument to the extent specified herein. Unless otherwise specified, the applicable issues of the documents which have been adopted by the DoD are those listed in the specific issue of the DoDISS cited in the solicitation. Unless otherwise specified, the documents not listed in the DoDISS are the issue
10、s of the documents cited in the solicitation (see 6.2). AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) ANSYASQC 21.4- 1993 Sampling Procedures and Tables for Inspection by Attributes (Application for copies should be addressed to: THE AMERICAN NATIONAL STANDARDS INSTITUTE, 11 WEST 42ND ST, NEW YORK NY
11、 10036) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM-B-117 Standard Test Method of Salt Spray (FOG) Testing (Application for copies should be addressed to: THE AMERICAN SOCIETY FOR TESTING AND MATERIALS, 1916 RACE STREET, PHILADELPHIA PA 19103-1187) 2.4 references cited herein (except for
12、related associated 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. If there is a conflict between the contents of this specification and a
13、n associated specification or specification sheet, the associated specification or specification sheet should apply. Order of precedence. In the event of a conflict between the text of this document and the 3. REQUIREMENTS 3.1 be used for general dimensional purposes such as length, width, and thick
14、ness but should not be construed as the only possible design approach. General. Figure 1 represents a general concept of a pneumatic inflator valve. It should 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-PRF-2763D W O6 2037007 724 MIL-PRF-2
15、763 9D 3.2 article inspection in accordance with 4.5. First arti cle. When a first article is specified (see 6.2 and 6.4) it shall be subjected to frst 3.3 component parts used in the inflator valve shall have been manufactured not more than 12 months prior to the date of delivery to the Government.
16、 Age. Unless otherwise specifically approved by the procuring activity, all materials and 3.4 decomposition, fungus, salt spray, and any other environmental conditions that may be encountered during operational use or storage. Cadmium and other materials identified as pollutants by the Environmental
17、 Protection Agency (EPA) should be avoided where possible. Materials. All materials shall be suitably treated to resist corrosion due to electrolytic 3.5 Recycled. recovered. or environmentally oreferable materials. Recycled, recovered, or environmentally preferable materials should be used to the m
18、aximum extent possible provided that the materials meet or exceed the operational or maintenance requirements, and promote economically advantageous life cycle costs. 3.6 world-wide environmental conditions that may be encountered by aircrew personnel. The unit shall function easily when activated b
19、y personnel wearing all types of flight gear. weration. The pneumatic inflator valve shall be capable of being easily operated in any 3.7 support items. Housing. Housing shall be of any material that is currently accepted in industry for life 3.8 Comtionent s. 3.8.1 Inflator valve. The inflator valv
20、e discharge mechanism shall consist of an external lever and an internal piercing pin and shall have a seal that will prevent leakage of pressure fi-om the life preserver cell when the lever is in the operated (locked) position. The inlet shall be threaded to accept a carbon dioxide (CO,) cylinder c
21、onforming to MIL-PRF-25369. A locking mechanism shall be provided to retain the CO, cylinder in the inlet. An outlet shall be provided to mount the inflator valve on the valve stem of the preserver cell. 3.8.2 Actuating lever. All edges of the lever and the case depth shall have a radius of 0.010 in
22、ch, The lever shall be O. 1094 inch thick and shall be held in a stationary position while in operation. In the unoperated position, the lever shall lay against the side of the inflator valve, recessed in the housing. 3.8.3 Piercine pin. The piercing pins shall have a case depth of 0.010 inch and sh
23、all be manufactured of a material that is currently recognized for life support items. A seal shall be provided to prevent leakage of the pressure fi-om the life preserver cell after the piercing pin has been retracted. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without l
24、icense from IHS-,-,- HIL-PRF-27b39D 9999906 2037008 660 MIL-PRF-2763 9D . 3.8.3.1 Piercing pin spring. A piercing pin spring shall be provided to retract the pin immediately fi-om the opening of the punctured CO2 cylinder. 3.8.4 Outlet. Each inflator valve shall be capable of mounting on an inflator
25、 valve stem. The gas passages in the outlet shall align with the holes in the side of the stem regardless of which side of the outlet is toward the base of the stem. 3.8.4.1 Vent pass ages. Passages shall be provided in the housing for conducting gas fi-om the punctured CO2 cylinder to the outlet wh
26、en the lever is in the operated position. Passages shall also be provided for venting residual air that may be trapped in the life preserver cell, from the outlet through the inflator valve, when the lever is in the unoperated position. 3.8.5 Val ve stem cap. A valve stem cap shall be provided to ho
27、ld the infiator valve in place on the valve stem. 3.8.6 Lanvard. A lanyard shall be attached to the free end of the actuating lever. 3.8.7 Gaskets. Gaskets shall be provided to seal the attachment points of the outlet and the inlet of the inflator valve. 3.9 Perfom ance. 3.9.1 more than 2 pounds att
28、ached to the ianyard end of the actuating lever. Op erating force without CO, cvlinda. The inflator valve shall operate with a load of not 3.9.2 valve, of puncturing a CO2 cylinder conforming to MIL-PRF-25369. The mechanism shall be positioned so as not to accidentally puncture the CO2 cylinder due
29、to vibrations or other motion encountered in an operational or storage environment. Piercing mechan ism. The piercing mechanism shall be capable, for the life of the inflator 3.9.3 Lever operation. A stop shall be provided to prevent the lever from traveling a distance of more than 90 degrees from t
30、he horizontal axis of the housing. A means shall be provided to return the lever to within 1 O degrees fiom the unoperated position immediately after discharge of the CO2 cylinder conforming to ME-PRF-25369. 3.9.4 Hvdros tatic pressure. The inflator valve shall satisfactorily withstand a hydrostatic
31、 pressure of 1500 pounds per square inch (PSI) without deformation or leakage. 3.9.5 Salt spray. The infiator valve shall operate properly after 96 hours of exposure to a salt spray environment. 3.9.6 Leakage. The infiator valve shall display no evidence of leakage during normal operation. 4 Provide
32、d by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-27639D 3.9.7 -tine fo rce with cvlinder. With an actuating load of not more than 20 inch-pounds, the inflator valve shall pierce and discharge a CO2 cylinder conforming to MIL-PRF-25369 in not more tha
33、n 2.5 seconds. 3.9.8 Lock. The lock shall be such that a CO2 cylinder installed with a torque of 60 inch- pounds can be loosened with a torque of not less than 30 or more than 60 inch-pounds. 3.9.9 Weight The total weight of the pneumatic inflator valve shall not exceed 60 grams. 3.9.10 Interchangea
34、bility. All parts having the same manufacturers part number shall be functionally and dimensionally interchangeable. The item identification and part number requirements of 3.9.1 1 shall govern the manufacturers part number and changes thereto. 3.9.1 1 Markings. The pneumatic inflator valve shall be
35、 marked for identification with the following information: VALW, PNEUMATIC INFLATOR (LIFT PRESERVER., FLU-1M) Manufbcturers Identification Contract or Order No. Date of Manufacture 3.9.1 1.1 Identificati. on. The identification marking on the inflator valves shall be durable enough to last through t
36、he normal life expectancy of the item and be capable of withstanding the environmental tests and cleaning procedures specified. All markings shall be clearly readable. Identification marking on identification plates shall be of a color which is in contrast to the color of the surface of the plate. I
37、dentification tag marking, when used, shall be permanent to the extent required for the utilization of the item. Whenever practical, the marking of the item shall be located in such a manner as to allow it being visible during normal operational use. The use of marking materials that create environm
38、entally hazardous conditions is prohibited. The marking of items shall be accomplished in a manner which shall not adversely affect the life and utility of the item (see 6.5). 3.9.12 Safety. The pneumatic inflator valve shall be functional without sharp edges, burrs, or protrusions that might cause
39、injury or prevent the use of the item. 3.9.13 Workmanshi . The infiator valve, including all parts and equipment, shall be constructed in accordance with commonly accepted industrial workmanship standards. 3.9.14 Actu ator safety restraint A replaceable actuator safety restraint shall be provided to
40、 prevent the actuator from operating accidentally and causing the piercing mechanism to puncture the CO2 cylinder. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-PRF-27639D 9999906 2037030 219 MIL-PRF-2763 9D 4. VERIFICATION 4.1 as follows: C
41、lassific ation of inspections. The inspection requirements specified herein are classified a. First article inspection (see 4.2) b. Conformance inspection (see 4.3) 4.2 tests described in 4.7. First article inspection. First article inspection shall consist of all examinations and 4.3 Conforman ce i
42、nspection. This inspection shall include the tests in 4.3.1 and 4.3.2. 4.3.1 described under 4.7. Individual inspection. Individual inspections shall consist of the following tests as a. b. c. d. Actuator operation (see 4.7.4) Examination of product (see 4.7.1) Operation test without CO2 cylinder (s
43、ee 4.7.2) Piercing mechanism operation (see 4.7.3) 4.3.2 Sampl ing in- ection. 4.3.1 Lot size. A lot shall consist of inflator valves manufactured under essentially the same conditions and submitted for inspection at the same time. The lot size for sampling plans A and B shall consist of up to 500 u
44、nits. The lot size for sampling plan C shall be in accordance with ANSYASQC Z1.4-1993 inspection level S-3. Sampling plans A, B, and C shall be conducted in accordance with the quality assurance section of the contract. Non-conformance requirements for sampling plans A, B, and C shall be provided in
45、 the quality assurance section of the contract (see 6.7). 4.3.1.1 -. One infiator valve shall be selected at random fkom the first lot, and from each fourth lot thereafter, and shall be subjected to the following tests as described under 4.7. a. Hydrostatic pressure (see 4.7.5) b. Salt spray (see 4.
46、7.6) c. Safety actuator restraint (see 4.7.10) 4.3.1.2 Samp ling plan B . Ten inflator valves shall be selected at random from each lot and shall be subjected to the following tests as described under 4.7. a. Leakage (see 4.7.7) b. c. Lock (see 4.7.9) Operation test with CO, cylinder (see 4.7.8) 6 P
47、rovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-PRF-27639D Ob 2037011 155 MIL-PRF-27639D 4.3.1.3 Smp ling: plan C. Upon completion of the individual tests specified in 4.2, random samples shall be selected from each lot in accordance with inspect
48、ion level S-3 of the ANSVASQC 21.4-1993. The sample size shall be based only on the applicable size code letter corresponding to inspection level S-3. Each inflator valve selected as a sample unit shall be forwarded to an inspection activity (see 6.3) selected by the procuring activity for the follo
49、wing tests as described under 4.7. a. b. c. d. Actuator operation (see 4.7.4) Examination of product (see 4.7.1) Operation test without CO2 cylinder (see 4.7.2) Piercing mechanism operation (see 4.7.3) 4.4 Inspection conditions. 4.4.1 Test it ems. Unless otherwise indicated in the tests methods, all perfomiance, environmental and test requirements are based on a pneumatic inflation valve complete with replacable components. 4.
