1、- MIL-V-21703B 16 777770b 0372033 I! 1 1 ,; 3IIL-V-21OlB SUPERSEDING 21 December 1964 26 MARCH 1969 hlI L- V- 2 1 7 O 1 A (ASG) MILITARY SPECIFICATION VALVE, CHECK, OXYGEN MASK, INLET This specification is mandatory for use by all Depart- ments and Agencies of the Department of Defense. 1. SCOPE 1.1
2、 This spccification covers one type ofoxygen misk inlet cli 2. APPLICABLE DOCUMENTS ck valve. 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of the specification to the extent specified herein. SPECIFIC ATIONS Federal BB-A-1034
3、Air , Compressed, for Breathing Purposes BB- N- 41 1 PPP-B-566 Boxes, Folding, Paperboard Nitro gen PPP- B-601 Box, Wood, Cleated-P1prood PPP- B-636 Box, Fiberboard PPP- B-676 Boxes, Setup Military hIIL- P- 116 Preservation, Methods of MI G M- 6 482 Mask Assemblies, Oxygen, Pressure Breathing M 11,-
4、 17- 2 2 1 9 1 Films , Transparent , Flexible, Hcnt Sealable , for lhcl. THIS DOCUbAHkdT .I 7 - -*- - f . . ,;_ Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-iITL-V- 2 170 1B SPECIFICATIONS of improper size, location, sequence; or method of applica
5、tion; markings not the same on the interior and ex*erior containers. Any non-conforming coinponent ; any coinponent missing, damaged, or otherwise defective. Inadequate application of the components such as incomplete closure of the unit package, intermediate package, container flaps, loose strappin
6、gs, etc. ; bulging or distortion of the con- tainers. Number per container is more or less than required; gross or net weight exceeds the require- ments. 4.7.2 Leakage - The test fixture (4.6.3) shall be assembled as shown on Figure 1 and installed in test stand shown on Figure 4. Adjust control val
7、ve to prodwe a suction of 1 inch of water on the inlet side of the valve and maintain this condition for a minimum period of 2 minutes. During this period, the leakage through the valve shall be read on the manometer and the valve shall pass the requirements specified in 3.5.1. The test procedure sh
8、all then be repeated utilizing requirements specified in 3.5.1. suction of 13 inches of. water and the valve shall pass the Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-b MIL-V-237OLB lb M 97q77Ob 0372027 =* MIL-V-2170 1B 4.7.2.1 Upon completion o
9、f test procedures, i permissible leakage limits are exceeded, the valve shall be rinsed in distilled water and then dried thoroughly using clean dry air to remove any lint that may be on the valve seat. The leakage test procedure shall then be repeated. 4.7.3 Pressure drop - The test fixture (4. 6.
10、3) shall be assembled as shown on Figure 1 and installed in test stand shown on Figure 5. Adjust control valve so that a pressure of 10 inches of water shall be applied to the inlet side of the valve and to produce a flow of 50 liters per ininute through the valve in the tiormal direction of flow. T
11、hese conditions shall be maintained for a iiiinimum period of 2 minutes. During this period, the pressure drop through the valve shall be read on the manometer and the valve shall pass the requirements specified in 3.5.2. 4.7.4 Altitude operation - Valves shall be installed in oxygen masks conformin
12、g to MIL-M-6482. The masks shall be worn by 5 subjects and they shall be subjected to simulated flight conditions from sea level to 43,000 feet altitude. During this test, the valves shall pass the requirements specified in 3.5.3. 4.7.5 Low temperature operation - A valve shall be installed in the t
13、est fixture (4.6.3) as shown on Figure 1. The test fixture and valve shall then be placed in a test chamber and conditioned at a temperature of -20 +5“ F for 3 hours. After conditioning, and while still at this temperature, the valve shall be these test procedures, the valve shall be returned to roo
14、m temperature and shall then be subjected to and pass the requirements of the leakage test. subjected to and pass the requirements of the leakage test. Upon completion of 4.7.6 High temperature operation - A valve shall be installed in the test fixture (4* 6.3) as shown on Figure 1. The test fixture
15、 and valve shall then be placed in a test chamber and conditioned at a temperature of +I60 f5 F for 3 hours. After conditioning, and while still at this temperature, the valve shall be subjected to and pass the requirements of the leakage test. Upon completion of these test procedures, the valve sha
16、ll be returned to room temperature and shall then be subjected to and pass the requirements of the leakage test. 4.7.7 Ozone-resistance - The test slabs submitted for qualification . shall be tested for ozone resistance. The test apparatus shall be in accordance with ASTM 3lei.hod No. D1149. The tes
17、t slab;? shall be elongated 20 percent, placed in an ozone-free aliiiosphere for 24 hours, then placed in the ozone chamber. The cliniinbci- sh:ill IJC ndjiisted to 100 I2“ F and to give an exposure of ozone concentra- tim o 13) 10 I)ni.ts by voluine of ozonc! per niillion parts by voluiiio of air,
18、lhc ;iii*-ozwi vttlocty iii Ilil! clininbcr sliall be nt lcasl 2 foc1 pcr iiwond, he mntcrial sliall l)c! i*q)osd to tlicsc condilions loi* ci0 minutes. Uic lest slabs shall then hc osnmiticd iiiiclci. 10s 1ii:ignification and shall pass the requirements specified in 3.5. ci. Provided by IHSNot for
19、ResaleNo reproduction or networking permitted without license from IHS-,-,-L -. - _- MIL-V-23703B 3b 9999706 0392028 T MILV-21701B 5. PREPARATION FOR DELIVERY . 5.1 Packaging - Packaging shall be Level A or C, as specified in the contract or order (see 6.2). 5.1.1 Level A - Unless otherwise specifie
20、d, each valve shall be pre- served aid packaged in accordance with MIL-P-116, Method IC-3. shall be cleaned in accordance with Process C-1 except that cleaning by immersion in solvent shall be prohibited. Immediately after cleaning, the valve shall be sealed within a transparent film bag, minimum fi
21、lm thickness of., 0015 inch, con- forming to MIL-B-22205, Type III. MIGF-22191, paragraph 3.4.1, is not mandatory. The bagged valve shall be suitably cushioned and packaged within a close fitting set up or folding paperboard box conforming to PPP-B-566 or PPP-B-676. Each valve The continuous line ma
22、rking requirement of 5.1.2 Intermediate packing - Unless otherwise specified, twenty-four valves, packaged asspecified in 5.1.1, shall be packaged within an intermediate fiberboard box, conforming to PPP-B-636, Class - Weather resistant, Grade W6C. The closure and sealing shall be accomplished in ac
23、cordance with the applicable requirements in the appendix to PPP-B-636, 5.1.3 Level C - Each valve shall be preserved and packaged in a manner that will prevent physical damage and corrosion during transit from the supply source to the first receiving activity. The contractors commercial practice ma
24、y be utilized when it conforms to the criteria stated herein. 5.2 Packing - Packing shall be Level A, B or C, as specified in the contract or order (see 6.2). Insofar as practicable, shipping containers shall effect a close fit, contain identical quantities and be of uniform configuration. 5.2.1 Lev
25、el A - Valves packaged as specified in 5.1.1 and 5.1.2 shall be packed for shippent within fiberboard containers conforming to PPP- B-636, Class- Weather resistant, Grade V3S or V3C, or plywood conforming to PPP-B-601, weather- resistant class, as specified (see 6.2). Plywood boxes shall be surf:ice
26、 heated in accordance with the requirements of PPP- B-601. The iii:isiniuni gross weight :ilid dimensions of the shipping containci. shall conforni to $t? requirements of l:iule II of PPP- B-636. be accomplished in accordance with the applicable requirements in the :ippeiidis to The closure, sealing
27、 and Ieinforciiig of the shippiiig coiitaiiiers -si:lll PPP- B- 636. 5.2.2 Level B - Valves packaged as specified in 5.1.1 and 5.1.2 s1i:ill x. packed foi. shipment within fiberboard containers conforming to PPP- B-636, Class - Doiiic.stc, Gr;ide 275. Thc maximum gross weight and dimensions of the s
28、liippiiig coii1:iiiici- shall conform to the requirements of Tablc I of PPP- 13-636. The closure aiid sc:iliiig o the shipping containers shall he xccomplished in accordance vit11 the app1ic:blrt -requirements in the appendix to PPP- 3-636. Provided by IHSNot for ResaleNo reproduction or networking
29、permitted without license from IHS-,-,-. hIIGV-21701B 5.2.3 Level C - Valves preserved and packaged as specified shall be packed for shipment in a manner that will afford protection against damage during trnnsit from the supply source to the first receiving activity. The pack shall as a minimum, com
30、ply with the rules and regulations applicable to the mode of trans- portation utilized. 5.3 hTarking- All unit, intermediate and shipping containers shall be marked in accordance with MIL-STD-129. The cure date of the elastomer com- ponent as well as the contract or order number shall appear on the
31、unit containers. 5.3.1 Precautionary marking - The following precautionary marking shall appear on each unit package: lCAUTION: DO NOT ALLOW CONTAMINANTS OF ANY KIND TO BE USED ON OR ABOUT THE OXYGEN VALVES 6. NOTES 6.1 Intended use - The inlet check valve is intended for use as a component of press
32、ure breathing oxygen masks conforming to MILhI-6482. 6.2 Ordering data - Procurement documents should specify the following : (a) Title, number, and date of this specificatioii. (b) Whether first article inspection is waived (see 4.4.1). (c) Name and address of the first article inspection . laborat
33、ory (see 4.4.1). (d) Whether test equipment, other than specified, may be used (see 4.6.4). (e) Selection of applicable levels of preservation, packaging, and packing. (f) Applicable shipping container for LevelA packing (see 5.2,l). (2) Applicable methods of cleaning and preservation. (h) Items of
34、Data required (see 63). 6.3 _- Dah - For the information of Contractors :ind Contracting Officers, my Of thrdgta specified in :ipplicabIc documents listed in Section 2 of this specification Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MI E 17-217
35、O1 B or referenced lower-tier documents need not be prepared for the Government and shall not be furnished to the Government unless specified in the contract or order. The data to be furnished shall be listed on DD Form 1423 (Contractor Daa Require- ments List), which shall be attached to and made a
36、 part of the contract or order. NavAir Form 4200/25 (Drawings, Lists, and Specifications Required) shall be attached where applicable. 6.4 With respect to products requiring qualification, awards will be made only for products which are at the time set for opening of bids, qualified for inclusion in
37、 the applicable Qualified Products List whether or not such products have actually been so listed by that date. The attention of suppliers is called to this requirement, and mmufacturers are urged to arrange to have the products that they propose to offer to the Federal Government tested for qualifi
38、cation in order that they may be eligible to be awarded contracts or orders for the products covered by this specification. The activity responsible for the Qualified Products List is the Com- mander, Naval Air Systems Command, Department of the Navy, Washington, D. C. 20360; however, authorization
39、for qualification of products shall be obtained from the Commanding Officer, Naval Air Development Center, Johnsville, Warminster, Penn- sylvania 18974, Attention: Director, Aerospace Crew Equipment Department. Prior to submission of the samples for qualification inspection, the manufacturer shall s
40、ub- mit a request to the Aerospace Crew Equipment Department indicating a date Qn which the samples can be forwarded and also request an authorization number to ac- company the samples. 6.4.1 When requested, the manufacturer shall submit engineering drawings and inspection reports in accordance with
41、 SD-6, Provisions Governing Qualification. Custodians: Preparing Activity: Navy - AS Army - AV Navy - AS (Project No. 1660-0167) Re view act i vi ties : Navy - AS Army - AV i NOTICE - Review/user information is current as of date of this document. For fu- tiire coordimition of changes to this document, draft circulation should be based on thc inforiii;itioii iii tlic. current DODISS. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
