1、- SUPERSEDING MIL-B-25337A (USAF) 6 May 1957 MILITARY SPECIFICATION B(rPTLE ASSEMBLIES, VACUUM, AIRCRAFT 1. SCOPE 1.1 Scope. This specification covers the general. requirements for metal vacuum bottle assemblies for the purpose of storing and dispensing hot or cold liquids in aircraft. The assemblie
2、s are designed for use while install- ed either in the horizontal or vertical (inverted or up-right) position with- out removal of the bottle from the installation bracket, may be dispensed via a single delivery tube for crew members without the pressure helmet and also may be dispensed by a combina
3、tion of delivery and vent tube to crew members wearing the pressure helmet. 1.2 Class if icat ion. 1.2.1 Type and Sizes. In addition, liquids Type I - Horizontal installation (Figure 1). Type II - Vertical inverted installation (Figure 2). Type III - Vertical upright installation (Figure 3). Size -
4、1 1 Quart Size - 2 = 2 Quart 2. APPLICABLE DOCUMPINTS 2.1 The following documents, of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein. SPECIFICATIONS Federal L-P-403 Plastic Molding Material, Polytetrafluroe
5、thylene QQ-B-601 Brass, Castings QQ-B-626 Brass Leaded and Non-Leaded: Rods, Shapes, QQ-B-613 (TFE - Fluorocarbon) Forgings and Flat Products with Finished Edges (Bars, Flat Wire and Strips) Brass, Leaded and Non-Leaded, Plate, Rolled, Bar, Sheet and Strip FSC 7330 Provided by IHSNot for ResaleNo re
6、production or networking permitted without license from IHS-,-,-QQ-C-320 QQ-N-290 QQ-S-698 QQ-S-763 QQ-S-766 TT-E-489 TT-P-636 PPP-B-636 Military MU-P-116 MIL-T-8606 MIL-M-20693 MIL-T-25458 Federal FED-STD-123 FED-STD-595 Military MfL-STD- 105 MIL-STD-129 MIL-STD-130 Provided by IHSNot for ResaleNo
7、reproduction or networking permitted without license from IHS-,-,-MIL-B-25337B (USAF) 3.2 wteriah, Materials shall conform to the applicable opecificatione and requirements specified herein. defined shall be of the quality normally used in the manufacturers standard comercial item. 3.2.1 Steel. carb
8、on sheet. Carbon steel sheet ehall conform to cold-rolled comercial quality of QQ-S-698. 3.2.2 Steel, corrosion-resisting. Corrosion resisting steel ehall be in accordance with Classes 302, 303, 304, 305, Condition A of QQ-9-763 or QQ-S-766. 3.2.3 Brass. QQ-B-613 or QQ-B-626. Brass required for mach
9、ining ehall conform to QQ-B-613 or QQ-B-601, 3.2.4 plam. Where plating is specified, it shall be nickle and chromium in accordance with QQ-N-290 and QQ-C-320. 3.2.5 Plastics. MIL-M-20693. 3.26 Rubber tubing. 3.2.7 Primer. Primer shall conform to ZT-P-636. 3.2.8 Enamel. Enamel shall conform to Class
10、B of TT-E-489. Color shall be lusterless black shade no. 37038 of FED-STD-595. 3.3 Desinn. for whichever type is specified (see 6.2). for maximum sanitation and ease of cleaning, 3.4 Construction. Details not specifically defined herein shall be in accordance with the manufacturers standard practice
11、. 3.4.1 Vacuum bottle. The vacuum bottle shall consist basically of an inner shell, an outer shell, a bottom cap, a top cap with 8 spigot asssmbly, a drinking tube, a hand valve, and a vent tube when required. outer shells shall be joined by the manufecturere standard comasrical tach- nique for weld
12、ing or brazing. of air. he inner shell shall be conetructed o corrorrion-rerirtlng ateal conforming to 3.2.2 and the outer shall shall be fabricated of cold-rolled steal conforming to 3.2.1. 3.4.2 Bottom cae, forming to 3.2.1. Selection of materials not epacifically Brass sheet required for forming
13、or drawing shall conform to Where plastics are used, they shall conform to L-P-403 and The color shall be black unless otherwiee epecified. The tubing used shall conform to MIL-T-25458 or equal. The vacuum bottle assembly shall conform to Figure 1, 2, or 3 The entire assambly ahel.1 provide The inne
14、r and The space between the shell8 rhall be evacuated “ha bottom cap shall be fabricated of carbon star1 con- 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-253378 73 W 7777706 02402L 4 m 4 HAND VALVE ASSY. c .31QD. (MAX.)- SEE 6.2 FOR LENGT
15、H EXTERIOR VENT TUBE VACUUM BOTTLE INTERIOR PICK-UP TUBE INTERIOR VENT TUBE FIG. I HORIZONTAL INSTALLATION 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-25337B (USAF) LENGTH. n - 4.59 (2 Ql -3.88 ( I QT. I Yv*cuuw /-VENT TUBE (INTERIOR) VEN
16、T TUBE (EXTERIOR 1 DRINKING TUB FIG. 2 VERTICAL INVERTED INSTALLATION TOP CAP -SPIGOT 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-VACUUM BOTTLE I 4.59 + (2 QTS.) t 3.00 -0 (1 QT.) I I Provided by IHSNot for ResaleNo reproduction or networking p
17、ermitted without license from IHS-,-,-MIL-B-25337B (USAF) 3.4.3 TOP cap. The cap shall be designed with an integral spigot similar to that ehown on Figures 1, 2, or 3. following material options or a combination of them. The vacuum bottle shall be provided with a screw-on top cap, The cap and spigot
18、 shall be constructed from any of the a. Brass conforming to 3.2.3. b. C. Plastic conforming to 3.2.5. Corrosion-resisting steel conforming to 3.2.2. 3.4.3.1 Spigot, the liquid supply exit and an air vent simultaneously. be parallel to the vacuum bottle when in the open position. operate smoothly op
19、ening and closing without using lubricants, 3.4.4 Interior vent tube. I and II vacuum bottles as shown on Figures 1 and 2, do not require an interior vent tube. bleed air into the vacuum bottle as liquid is drawn out. non-toxic and comply to the requirements of 3.6. 3.4.5 Type I and III vacuum bottl
20、es as shown on Figures 1 and 3. Type II vacuum bottles do not require interior pickup tubes. be capable of removing liquid from the lowest portion of the vacuum bottle, The tube shall be made partly of flexible tubing conforming to 3.2.6 and 3.6 and partly of stainless steel conforming to MIL-T-8606
21、. 3.4.6 Drinkinp; tube. drinking tube that is attached securely on one end to the liquid exit port of the spigot and on the other end to a hand valve assembly. an inside diameter of 1/4“ and the length shall be specified by the procuring agency (see 6.2). The tube shall conform to 3.2.6 and 3.6. 3.4
22、.6.1 Hand valve assembly. Each drinking tube shall be equipped with a hand valve assembly consisting of a hand valve, and a rigid mouth feed tube 5/16“ maximum outside diameter and 1/4“ minimum inside diameter sililar to that shown on Figures 1, 2, and 3. The length of the muth feed tube shall be sp
23、ecified by the procuring activity to be 4“ or 7“ (see 6.2). The mouth feed tube material shall be nylaflow tubing type “H“ or equal conforming to 3.6. The spigot shall be designed with a,valve to open and close The valve handle shall The valve shall An interior vent tube shall be installed in Type T
24、ype III vacuum bottles The vent: tubes shall be.designed to The tubes ehall be Interior pickup tube. An interior pickup tube shall be installed in The interior pickup tube shall Each vacuum bottle shall be equipped with a flexible The tube shall have The hand valve shall be made fraa any of the foll
25、owing material taptione: a. Brass conforming to 3.2.3. b. c. Plastic conforming to 3.2.5. Corrosion-resisting steel conforming to 3.2.2. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-2533 78 (USAI?) 3.4.7 helmet) vacuum bottles shall be equ
26、ipped with an exterior flexible vent tube conforming to 3.2.6 and 3.6. of 1/8“ and the length ohall be specified by the procuring agency, 3.5 Finish. The surface finish shall be uniform throughout, free of irregu- larities, scratches and blemishes. coated and free of blisters, scratches, rum, sags,
27、foreign matter, discolor- ation, and finger marks. 3.5.1 Finish, outer shell. The interior and the exterior surfaces of the outer shell shall be coated with a primer conforming to 3.2.7. surfaces shall be painted with two coats of enamel conforming to 3.2.8. 3.5.2 Finish, inner shell. have a uniform
28、 commercial No. 2B finish or better. 3.5.3 Finish, bottom cap. conforming to 3.2.4 and coated with primer on the interior per 3.2.7 and two coats of enamel per 3.2.8, 3.5.4 Finish, top cap. If the top cap is constructed of brass, then it shall be plated per 3.2.4, then it shall have a comercial 2B f
29、inish. If plastic is used, it shall be chromium plated on the exterior by the manufacturers standard process and finished smoothly on the interior surface, light green color. 3.6 Toxicitv. The tubing, hand valve and Spigot material shall bear the seal of approval of the National Sanitation Foundatio
30、n Testing Laboratory or have been evaluated and found acceptable by another impartial agency using equiva- lent testing procedures and standards. The manufacturer shall cite the test report from any laboratory other than the NSF which may have conducted the tests . 3.7 Marking. MIL-STD-.130 6 3-8 Wo
31、rkmanship. All joints in the vacuum bottle inner and outer shells shall be free of any defects which may adversely affect serviceability, appearance, and cleaning. Exterior vent tube. Type I and II (and III where used with a pressure The tube shall have a minimum inside diameter Painted surfaces sha
32、ll be completely Then both The interior surface of the inner shell shall The bottom cap shall be plated on the exterior If the top cap is constructed of stainless steel, The plastic interior shall be Vacuum bottles shall be marked on the bottom in accordance with 4. QUALITY ASSURANCE PROVISIONS 4.1
33、Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all in- spection requirements as specified herein, Except as otherwise specified, the supplier may utilize his own facilities or any commercial laboratory a
34、ccept- able to 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 that supplies and services conform to prescribed requirements 8 Provided by IHSNot for ResaleNo reproduction or netw
35、orking permitted without license from IHS-,-,-MILB-25337B (WAF) 4.2 Preproduction sample inspection. men a preproduction sample is required, it shall be examined for defects in Tabla II and subjected to the applicable tests in 4.5.2, 4.5.3, 4.5.4, 45.5, 4.5.6, 4.5,7 and 4.5.8. 4.3 Samplinu for inspe
36、ction. Sampling for inspection shall be performed in accordance with the provisions set forth,in MIL-STD-105, except where other- wise specified herein. 4.3.1 Component and material inspection. In accordance with 4.1, components and material shall be inspected and tested in accordance with all the r
37、equire- ments of referenced specifications, drawings and standards unlees otherwise excluded, amended, modified, or qualified in thie specification or applicable purchase document. 4.3.2 JnDrocess examination. Examination shall be made during the manufactur- ing process for the requirements in Table
38、 I, to establish that no deviation is made from indicated requirements. shall be made to affected items and process. When nonconformance is noted, correction . TABLE I INPROCESS EXAMINATION ReQUIReMeNT OPERATION PARAGRAPH 1. Outer shells primed internally and externally 3.5.1 2. Outer shells coated
39、internally and externally 3.5.1 3. Inner shells have No. 2B finish or better .3.5.2 in terna lly 3.5.3 5. Top caps: If brass, plated 3.5.4 4. Bottom caps plated externally, primed and coated If CRES, No. 2B finish or better If plastic, smooth light green color 4.3.3 End item inspection. The lot shal
40、l consist of all vacuum bottle assemblies of the same type and size offered for inspection at one time. 4.3.3.1 Visual examination. able defects classified in Table II. acceptable Quality Level (AQL) shall be 2.5 for major defects and 6.5 for total defects expressed in terms of defects per hundred u
41、nits. The end items shall be examined for the applic- The inspection level shall be II. The 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Finish Roughness or discoloration (Exterior incorrect; illegible; improper size, location, sequence, or meth
42、od of application Materials - Component missing or damaged Workmanship Inadequate application of cushioning material, tape banding, steel strapping or box flaps not secured Contents Weight of content of shipping containers exceeds re- quirements. 11 Provided by IHSNot for ResaleNo reproduction or ne
43、tworking permitted without license from IHS-,-,-MIL-B-25337B (USAF) A 4.5 Tests. 4.5.1 Atm OsDheric conditions. Unless otherwise epecified, all tests requir- ed by this specification shall be made at an atmoepheric pressure of 24 to 30 inches of mercury and at a temperature of 70 degrees plus or min
44、ue 10 degrees Fahrenheit. 4.5.2 wlv I&L&L The assembly, without the exterior vent and drinking tubes, shall be tested by attaching an air line to the delivery tube of the spigot with the vent tube closed off. filled with an air pressure of not less than 15 pounds par square inch. The container shall
45、 then be immersed in water, while maintaining the above pree- sure, for not less than 5 minutes. Any Leakage, as indicated by air bubbles from the container, shall be cause for rejection, 4.5.3 Bottleleakane. The Container shall be tested after all assembly work has been accomplished, but before eva
46、cuation, to the bottom plug, and the inside shell ehall be filled with water. pressure of not less than 50 nor more than 60 pounds per square inch shall be applied to the air line, and the interior of the bottle observed for air bub- bles. water and the outside shell observed for air bubbles. age, a
47、s indicated by the formation of air bubbles, shall be cause for rejection. 4.5.4 -. Each sample bottle assembly shall be filled with water and the cap and spigot put in place. Assemblies designed or vertical installation shall be munted in the inverted position and the handle placed in the open posi
48、tion. There shall be a smooth steady flow of water until the bottle has been completely emptied. installation shall be mounted in the horizontal position and the handle plac- ed in the open position. With the hand valve lower than the mouth of the bottle it shall be possible to easily empty the bott
49、le except for a small residue of liquid. The intarior of the bottle shall be An air line ehall be attached An air The container, while still under pressure, shall then be imnersed in Any evidence of leak- Assemblies designed for horizontal -1 4.5.5 7 The sample bottles ahall be preheated with water at a temperature of plus 205 degrees Fahrenheit (plus or minus 2 degrees
