AIR FORCE MIL-DTL-25666 2-1995 CONVERTER LIQUID OXYGEN GCU-3 A《GCU-3A A型液氧转换器》.pdf
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1、. . MIL-DTL-25bbb/2 Ob 2OObLL2 380 U IINCH-POUNDI MIL-DTL-2566612 (USAF) 15 Septe mber 1995 SUPERSEDING 27 March 1981 MIL-C-25781C (USAF) DETAIL SPEC1 FICATI ON CONVERTER, LIQUID OXYGEN GCU-3/A This specification is approved for use by the Department of the Air Force and is available for use by all
2、Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Score. This specification covers one type of converter. it provides storage and pressurization of 10 liters of liquid oxygen to 70 pounds per square inch gauge (psig), nominal pressure and does not have integral warming coils. The c
3、onverter is designated GCU-3A. 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 sections of this specification or recommended f
4、or 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, whether or not they are listed. 2.2 Government
5、 docu ments. 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 Department of Defense Index for Specifications and
6、Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS DEPARTMENT OF DEFENSE MIL-V-9050 MIL-C-25516 MIL-DTL-25666 Valves, Oxygen, Pressure Relief, Aircraft Connectors, Electrical, Miniature, Coaxial, Environment Resistant Type, Converters, Liquid Oxygen, Capac
7、itance Type Gauging, General Specification For General Specification 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, 3001 Staff Drive, Tinker AFB, OK 73 145- 3037 by using the
8、self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC NIA F5C 1660 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted wit
9、hout license from IHS-,-,-PlIL-DTL-2568bJ2 79999!l!6 20RhLL3 217 MIL-DTL-25666/2 STANDARDS DEPARTMENT OF DEFENSE M IL-STD- I 29 Marking for Shipment and Storage (Unless otherwise indicated, copies of federal and military specifications, and standards are available from the Standardization Documents
10、Order Desk, Building 4D, 700 Robbins Ave, Philadelphia, PA 191 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, supersedes applicable laws a
11、nd regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Oualification. The converters furnished under this specification shall be products which are authorized by the qualifying activity for listing on the applicable qualified products list at the time set for opening of bi
12、ds (see 4.2 and 6.3). 3.2 Design and construction. The converter shall conform to figures I, 2 and 3. The converter shall have an operating pressure of 70 pounds per square inch gage (psig) and a minimum capacity of 10 liters of liquid oxygen measured at 1 atmosphere. 3.2.1 StrenPth. The filled conv
13、erter shall be designed to withstand the dynamic loads that are imposed by the following accelerations: Vertical (down) 14G Vertical (up) 6G Lateral 6G 3.2.2 Markine of vorts. The ports shall be marked as indicated in figure 1 3.2.3 Pressure relief valves. Tile pressure relief valves shall conform t
14、o type II of MIL-V-9050 and shall be of such size and shape to fit the over-all dimensions specified for the converter. 3.2.4 Weight. The weight of the converter shall not exceed 25 pounds. 3.3 Performance. 3.3.1 Final assembly pressure. The final assembly pressure of the converter shall be 95 psig.
15、 3.3.2 FillinP time. The time required to fill the converter shall not exceed 5 minutes. 3.3.3 Evaporation loss. 3.3.3.1 Vent condition. The evaporation loss of the essentially full converter in the vent condition shall not exceed 3 pounds of oxygen when tested as specified in MIL-DTL-25666. 3.3.3.2
16、 Buildup condition. The 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. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-25666/2 99999
17、06 20061L4 153 H MIL-DTL-25666/2 3.3.4 Buildup time. The time required for the converter to reach its operating pressure immediately after it has been filled shall not exceed 10 minutes. 3.3.5 Capacitance. The capacitance of the sensing element, after it is installed in the empty converter, shall be
18、 123.5 +1 .O picofarad (PF). 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-25666 when subjected to a pressure of 200 psig. 3.3.6.2 Permanent volumetric expansion. The converter shall
19、 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 Delivery rate. 3.3.7.1 Constant flow. The converter shall deliver a flow of gaseous oxygen at 72 +IO liters per minute for not
20、 less than i .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 during the entire period of flow. The flow at the specified rate shall be initiated within IO minutes after th
21、e converter has reached the operating pressure. The full test procedure is specified in MIL-DTL-25666. 3.3.7.2 Cvclic flow. The converter shall deliver oxygen as specified (see 3.4.7.1) for not less than 1.5 hours when tested as specified in MIL-DTL-25666. 3.3.8 Calibration. The capacitance sensing
22、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, using the equations that are specified (see 3.3.8. i) to determine tolerances. An example of the use of
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