1、 MIL-DTL-25bbb/L 999990b 200b3b8 196 IINC“DI MI L-DTL-25666/ 1 (USAF) 15 September 1995 SUPERSEDING 15 January 197 1 MIL-C-25777C (USAF) DETAIL SPECIFICATION CONVERTER, LIQUID OXYGEN GCU-2A/A This specification is approved for use by the Department of the Air Force and is available for use by all De
2、partments and Agencies of the Department of Defense. I. SCOPE I. 1 Scope. This specification covers one type of liquid oxygen converter with a capacitance gauging element. It provides storage and pressurization of 10 liters of liquid oxygen to 70 pounds per square inch gauge (psig), nominal pressure
3、 and does not include warming coils. The converter is designated type GCU-2A/A 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are needed to meet the requirements specified in sections 3, 4, and 5 of this specification. This section does not include documents cited in other
4、 sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements documents cited in sections 3,4, and 5 of this specification
5、, whether or not they are listed. 2.2 Government documents. 2.2.1 SDecifications. and standards. The following specifications and standards form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Depa
6、rtment of Defense Index for Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS DEPARTMENT OF DEFENSE MIL-V-9050 MIL-C-255 16 MIL-DTL-25666 Valves, Oxygen, Pressure Relief, Aircraft Connectors, Electrical, Miniature, Coaxial, Environment
7、Resistant Type, Converter, Liquid Oxygen, Capacitance Type Gauging, General Specification General Specification For For Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: OC-ALC/TICLA, 300 1 Staff
8、Drive, Tinker AFB, OK 73 145- 3037 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 1660 DISTRIBU TION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for
9、ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-DTL-256bb/L m 9999906 2006369 O22 m c M IL-DTL-2566611 STANDARD DEPARTMENT OF DEFENSE MIL-STD- 129 (Unless otherwise indicated, copies of federal and military specifications, and standards are available from the Standard
10、ization Documents Order Desk, Building 4D, 700 Robbins Ave, Philadelphia, PA 19 I 1 1-5094) 2.3 Order of Precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this documents takes precedence. Nothing in this document, however, supersede
11、s applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Oualification. Converters furnished under this specification shall be products which are qualified for listing on the applicable qualified product list at the time set for opening of bids (see 4.2 an
12、d 6.3). 3.2 Desim. The converter shall conform to the dimensions and general design shown on figures i and 2. The converter shall have A minimum capacity of 10 liters of liquid oxygen measured at 1 atmosphere and shall be deigned for an operating pressure of 70 psig. 3.2.1 Schematic diagram. The con
13、verter shall be designed in accordance with the schematic diagram shown on figure 3. 3.2.2 Design strength. The filled converter shall be designed to withstand the following G forces without dam age : Vertical (down) 14G Vertical (up) 6G Lateral 6G 3.2.3 Relief valves. The relief valves shall confor
14、m to MIL-V-9050, type II. 3.2.4 Weight. The weight of the complete converter shall not exceed 20 pounds. 3.2.5 Marking of ports. Ports shall be marked as indicated on figure I. 3.3 Performance. 3.3. 1 Final assemblv messure. The converter shall meet the performance requirements for the final assembl
15、y pressure test of MIL-DTL-25666 when subjected to a final assembly pressure of 95 psig. 3.3.2 Filling - time. Filling time shall not exceed 5 minutes when the converter is tested as specified in MIL- DTL-25666. 3.3.3 Evaporation loss. 3.3.3.1 Vent condition. The evaporation loss of the essentially
16、full converter in the vent condition shall not exceed 3 pounds of oxygen when tested as specified in MIL-DTL-25666. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-DTL-25hhb/L q99990b 2006370 844 MIL-DTL-2566611 3.3.3.2 Buildup condition. The
17、evaporation loss of the essentially full converter in the buildup condition shall not exceed 3 pounds of oxygen when tested as specified in MIL-DTL-25666. 3.3.4 Buildup time. Buildup time shall not exceed 10 minutes when the converter is tested as specified in MIL- DTL-25666. 3.3.5 Capacitance. The
18、capacitance of the sensing element ofthe empty converter shall be 123.5 k1.0 picofarad (pf) when tested as specified in MIL-DTL-25666. 3.3.6 Inner vessel pressure. 3.3.6.1 Inner vessel. The inner vessel shall meet the performance requirements for the inner vessel pressure test specified in MIL-DTL-2
19、5666 when subjected to a pressure of 200 psig. 3.3.6.2 Permanent volumetric expansion. The converter shall meet the performance requirements for permanent volumetric expansion as specified in MIL-DTL-25666 when subjected to a pneumatic or hydrostatic pressure of 200 psig . 3 3.7 Deliverv rate. 3.3.7
20、.1 Constant flow. The converter shall deliver a flow of gaseous oxygen up to 72 liters per minute for not less than 1 .5 hours with the operating pressure remaining between 70 and 80 psig after the first 15 minutes of flow. Pressures in the supply line shall remain between 55 psig and 105 psig durin
21、g the entire period of flow. The flow at the specified rate shall be initiated within 10 minutes after the converter has reached the operating pressure. The full test procedure is specified in MIL-DTL-25666. 3.3.7.2 Cyclic flow. The converter shall deliver oxygen as specified (see 3.4.7.1) for not l
22、ess than 1.5 hours when tested as specified in MIL-DTL-25666. 3.3.8 Calibration. The capacitance sensing element shall have characteristics that provide for a linear relationship between electrical capacitance and volume of liquid oxygen sensed. The relationship shall be in accordance with figure 4,
23、 using the equations specified (see 3.3.8. i) to determine tolerances. An example of use of the equations is as follows: At the 6 liter test point, suppose the actual quantity of liquid oxygen is 6.1 liters. The measured capacitance must be between C maximum (max) and C minimum (min). C max = 5.9 x
24、6.1 + 124.7 = 160.7 pf C min = 5.7 x 6.1 + 122.3 = 157.3 pf 3.3.8.1 Equations. The following equations shall be used to calculate the minimum and the maximum capacitances. Values less than 2 liters Values Preater than 2 liters C min = 5.6 L + 122.5 C max = 6.0 L + 124.5 C min = 5.7 L + 122.3 C max =
25、 5.9 L + 124.7 C = Capacitance in PF L = Exact quantity in liters of liquid at test point 3.3.9 Operating temperature. The operating pressure shall remain between 70 and 85 psig after the first 15 minutes of flow at the low temperature and between 65 and 80 psig after the first I5 minutes of flow at
26、 the high temperature when tested as specified in MIL-DTL-25666. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-25666/1 3.3.10 Vibration. 3.3.10.1 Vibration. The converter shall not exhibit physical evidence of damage after completion of t
27、he vibration tests as specified in MIL-DTL-25666. 3.3.10.2 Vibration - resonance. The converter shall not exhibit physical evidence of damage after completion of the resonance portion of the vibration test specified in MIL-DTL-25666. 3.3.10.3 Vibration - cvcling. The converter shall not exhibit phys
28、ical evidence of damage after completion of the cycling portion of the vibration test specified (see 4.4. i). 4. VERIFICATION 4.1 Classifications. The inspection requirements specified herein are classified as follows: a. Qualification inspection (see 4.2) b. Conformance inspection (see 4.3). 4.2 Ou
29、aiification inwection. The qualification inspection shall consist of all the inspection methods specified in MIL-DTL-25666. 4.3 Conformance inspection. The conformance inspection shall consist of the individual tests and the sampling plans and tests specified in MIL-DTL-25666. 4.4 Vibration. 4.4.1 -
30、cvcling-. The converter shall be vibrated under the cycling conditions specified herein for the applicable periods listed in table I. The frequency shall be cycled between 5 to 500 cps and return in a 15 minute cycle at an applied double amplitude of 0.036 inch or an applied acceleration of +10G whi
31、ch ever is the lower G value. The rate of change of frequency shall be logarithmic (see 3.3.10.3). 5. PACKAGING 5.1 Packaging. Packaging requirements shall be as specified in the contract or order (see 6.2). 5.2 Markine. Unless otherwise specified (see 6.2), marking shall be in accordance with MIL-S
32、TD-129. 6. NOTES (This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.) 6. I Intended use . The 10 liter, 70 psig converter covered by this specification is intended for use on T-38, F- I05D, F- 105E, and F-5 aircraft. 62 Acauisition require
33、ments. Acquisition documents must speciS/ the following: a. Title, number, and date of this specification b. Issue of DODISS to be cited in the solicitation, and if required, the specific issue of individual documents referenced (see 2. i). 4 Provided by IHSNot for ResaleNo reproduction or networkin
34、g permitted without license from IHS-,-,-MIL-DTL-2566611 6.3 Qualification. With respect to products requiring qualification, awards will be made only for products which are, at the time of award of contract, qualified for inclusion in Qualified Products List QPL-25666 whether or not such products h
35、ave actually been so listed by that date. The attention of the contractors is called to these requirements, and manufacturers are urged to arrange to have the products that they propose to offer to the Federal Government tested for qualification in order that they may be eligible to be awarded contr
36、acts or purchase orders for the products covered by this specification. Information pertaining to qualification of products may be obtained from, OC-ALC/TICLA, 3001 Staff Drive, Tinker AFB, OK 73 145-3037. 6.4 Subject tem kev word) listing. Breathing oxygen Capacitance Container, inner Container, ou
37、ter Delivery rate Dewar Element, sensing Evaporation loss Gunfire Life support LOX Valve, fill-buildup-vent Valve, pressure closing Valve, pressure relief Vibration 6.5 ChanPes from previous issue. Marginal notations are not used in this revision to identify changes with respect to the previous issu
38、e due to the extensiveness of the changes. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-25bbb/L W 9999906 2006373 553 W IO .o1 .o0 I I 0001 MIL-DTL-2566611 TABLE 1. Pawe curve for CO nverter vibration 57 O0 Frequency, CPS 6 Provided by I
39、HSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-DTL-25bbb/L M 9999906 2006374 49T M MIL-DTL-25666/1 ZHOLES MARKED B FIGURE 1. Front view 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- IIL-DTL-25666/1 9999
40、906 2006375 326 MI L-DTL-25666/ 1 , 12.82 REf + - 1 I I 8.80 (TYP FOR ALL PORTS 1 - ALLOW 1.12 MIN CLEARANCE FOR INSERTlOl Of SIDE BOLTS (TVP 4 PLACES 1 DIMENSIONS IN INCHES UNLESS OTHERWISE SPECIFIED TOLERANCES: FRACTIONS 2 1/32 FIGURE 2. Side view 8 Provided by IHSNot for ResaleNo reproduction or
41、networking permitted without license from IHS-,-,-NIL-DTL-25bbb/l m 999990b 200b37b 2b2 m MIL-DTL-25666/ i GAS BUILDUP CONNECTION CONNECTION 4 1 r- - - - - - - - - - - - - I I I - CONNECTIONS I VALVE 7 I l I I I I I I I I I I I I I I I I I I PRESSURE CLOSING -GAGE VA POR I2 I NG EOUIPMENT LIOUID OXY
42、GEN I FILLER VALVE I I VENT PRESSURE- RELIEF GASEOUS OXYGEN - ! I OR1 FI CE SUPPLY FIGURE 3. Schematic diamam 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- flIL-DTL-25bbb/L 77777Ob 2OOb377 IT9 2 4 fi MIL-DTL-25666/1 135.1 146.7 158.3 TYPICAL TES
43、T POINT RANGE FOR TYPICAL TEST POINT OUANTITY OF LlOUIO - OXYGEN LITERS Liauid oxwen (liters) I Nominal capacitance (PO 1 t 8 I 169.9 I I - I I FIGURE 4. pelat ionship between capacitance and volume o f oxygen sensed 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without lic
44、ense from IHS-,-,- flIL-DTL-25bbb/l 9999906 200b378 035 = MIL-DTL-25666/1 Custodian: Air Force - 99 Review activity: Air Force - 11 Preparing activity: Air Force - 71 Agent: Air Force - 99 Project 1660-F675 11 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
