1、 F-V-2906 = 9999974 0275278 2T7 INCH-POUND . F-V-2906 June 12. 1997 SUPERSEDING 4 October 1985 MIL-V- 18499E FEDERAL SPECIFICATION VALVES, AJRVENTING, STEAM The General Services Administration has authorized the use of this specification by all Federal agencies. 1. SCOPE AND CLASSIFICATION 1.1 Scope
2、. This specification covers valves for automatically venting air from mains in steam heating systems. 1.2 Classication. Valves shaU be one of the following types and classes, as specified (see 6.2): Type I - Without vacuum holding device. Type II - With vacuum holding device. Class 1 - Low pressure
3、Class 2 - Medium pressure - 16 to 65 psig (110.3 to 448.2 Wa). Class 3 - High pressure - up to 15 pound-force per square inch gage (psig) (103.4 kilopascal (Ha). - 66 to 125 psig (445.1 kPa to 861.8 Wa). 2. APPLICABLE DOCUMENTS 2.1 Government publications. The following documents, of the issues in e
4、ffect on the date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein. Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data which may improve this document should be sent to: Commandmg Officer (Code
5、 15E2), Naval Construction Battalion Center, 1000 23rd Avenue, Port Hueneme, CA 93043-4301, by using the Standardization Document Improvement Proposai OD Form 1426) appearing at the end of this document or by letter. AMSC NIA FSC 4520 Licensed by Information Handling ServicesProvided by IHSNot for R
6、esaleNo reproduction or networking permitted without license from IHS-,-,-F-V-290b m 9999374 0375279 333 m F-V-2906 Federal Standard FED-STD-HZ8 - Screw-Thread Standards for Federal Services Section 7 Pipe Threads - General Purpose (Copies of federal standard required by contractors in connection wi
7、th specific procurement fnctions are obtained -om the Defense Automated Printing Services, Attn: DoDSSP, Building 4D, 700 Robbins Avenue, Philadelphia, PA 191 11-5094.) 2.2 Other Dublications. The following documents form a part of this specification to the extent specified herein. Unless a specific
8、 issue is identified, the issue in effect on date of invitation for bids or request for proposal shall apply. AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) ANSI - 21.4 Sampling Procedures and Tables for Inspection by Attributes. (Private sector and civil agencies may purchase copies of these voluntar
9、y standards from the American National Standards Institute, Inc., 11 West 42nd Street, New York, NY 10036.) MA“FACTl2ERS STANDARD SOCIETY OF THE VALVE AND FITTINGS INDUSTRY, INC. (MSS) MSS SP-25 - Standard Marking System for Valves, Fittings, Flanges and Unions. (Private sector and civil agencies ma
10、y purchase copies of these voluntary standards -om the Manufacturers Standardization Society of the Valve and Fittings Industry, Inc., 127 Park Street, NE, Vienna, VA 22180.) OD activities may obtain copies of those adopted voluntary standards listed in the DoD Index of Specifications and Standards
11、fiee of charge fiom Defense Automated Printing Services, Am: DoDSSP, Buiiding 4D, 700 Robbins Avenue, Philadelphia, PA 191 11-5094.) 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 document takes precedence. Noth
12、ing in this specification, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Description. The type I air venting valve shad consist of a body, float, thermostatic element, vent, valve needle, and seat. The type II air venting valve
13、 shall consist of a body, float- thermostatic element or thermostatic element, vent, valve needle, seat, and a vacuum holding device. 2 Licensed by Information Handling ServicesProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-F-V-290b m 9999974 037528
14、0 955 m F-V-2906 3.2 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.2.1. 3.3 Standard commercial Droduct. The valve shall, as a minimum, be in accordance with the requirements of this specification and shall be the manufacturers
15、standard commercial product. Additional or better fatures which are not specifically prohibited by this specification, but which are a part of the manufacturers standard commercial product, shail be included in the valve being furnished. A standard commercial product is a product which has been sold
16、 or is being currently offered for sale on the commercial market through advertisements or mahufacturers catalogs, or brochures, and represents the latest production model. 3.4 Interchangeability. Au valves of the same classification fiunished with similar options under a specific contract shall be
17、identical to the extent necessary to ensure interchangeability, provided foxm, fit, and fiinction requirements are satisfied. 3.5 Materials. Materials used shall be fiee fiom defects which would adversely affect the performance or maintainabiiity of individual components or of the overall assembly.
18、Materials not specified herein shall be of the same quaiity used for the intended purpose in commercial practice. Unless otherwise specified herein, aii equipment, material, and articles incorporated in the work covered by this specification are to be new and fabricated using materials produced fiom
19、 recovered materials to the maximum extent possible without jeopardizing the intended use. The term “recovered materials” means materials which have been collected or recovered from solid waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials. Unless otherwise
20、specified, none of the above shall be interpreted to mean that the use of used or rebuilt products is ailowed under this specification. 3.6 Design. The air venting valves shall be designed for use on steam systems where both steam and condensate may be present. The valves shd be designed to vent air
21、 connections required for class 3 valves (see 3.8.1). When chromium- or nickel-plating is required (see 3.9). 6.3 Samling Drocedures. Recommended inspection level is S-2 and an AQL of 4.0 percent defective (see 4.3). 6.4 Supersession data. This specification replaces Military Specification MIL-V-184
22、99E dated 4 October 1985. 7 Licensed by Information Handling ServicesProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-F-V-2906 W 9999574 0375285 437 Class I Class II Class III (Low pressure) (Medium pressure) gh pressure) Type I without vacuum 1 2 3 h
23、olding device) Type II (With vacuum 4 5 6 holding device) - F-V-2906 b 6.5 Classification cross reference. Classifications used in this specification (see 1.2) are identical to those found in superseded Military Specification MIL-V-l8499E, dated 4 October 1985. 6.6 Part or Idene g Numbers (PINS). Th
24、e specification number, type and class are combined to form PINs for valves covered by this document (see 1.2). The type and class of the valve are identified by a single digit number (see table I). PINs for the valves are established as follows: FV2906 X Federal Specification Number: Type and class
25、 code number (see table I): TABLE I. Code number to type and class. 6.7 Subiect term Rey word) listing. Air venting Drop-away pressure Vacuum holding device 6.8 Changes fiom previous issue. Marginal notations are not used in this revision to identifl changes with respect to previous issue. MEITARY I
26、NTERESTS: CIVIL AGENCY COORDINATDJG ACTMTIES: Custodians: Navy - YD1 Air Force - 99 Review Activitv: DLA - CS GSA-FSS DOT - AC0 GSA - FCGC GSA - PCT PREPARING ACTIVITY: Navy - YD1 (Project 4520-0394) 8 Licensed by Information Handling ServicesProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
