1、I INCH-POUND I A-A-50498 5 Julv 1990 SUPERSEDING MIL-V-16720E 24 March 1986 and 20 August 1980 MIL-V-16721D COMMERCIAL ITEM DESCRIPTION VALVE, FOOT, CAST IRON, BRONZE AND POLYVINYL CHLORIDE (PVC) The General Services Administration has authorized the use of this commercial item description as a repl
2、acement for Military Specifications MIL-V-16720E and MIL-V-16721D which are cancelled. Abstract. This commercial item description (CID) covers foot valves used in suction pipeline systems for transporting water and light petroleum distillates. Salient characteristics. consisting of a valve body, tri
3、m and strainer. in one direction only and shall close tightly to prevent flow in the opposite direction. or jar. 25 pounds per square inch (psi) and an internal test pressure of 125 psi. iron flanged foot valves shall be in accordance with ANSI B16.1. Bronze and PVC valves shall withstand a working
4、pressure of 150 psi and an internal test pressure of 300 psi. End connections shall be internally threaded for brass valves. PVC valves shall have threaded, flanged, or solvent-welded end connections. Flanges shall conform to ANSI B16.24. Foot valves shall be of the poppet design, Valves shall permi
5、t flow Moving parts shall be smooth, nonsticking and operate without shock Cast Cast iron valves shall withstand a working pressure of !Beneficial comments, recommendations, additions, deletions, clarifications, I letc., and any data which may improve this document should be addressed to: I IHueneme
6、, CA 93043-5000, by using the Standardization Document Improvement I IProposal (DD Form 1426) appearing at the end of this document or bv letter. I ICommanding Officer (Code 156), Naval Construction Battalion Center, Port I FSC 4820 DISTRIBUTION STATEMENT A. Approved for public release; distribution
7、 is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. A-A-50478 48 7777774 0056328 O = A-A-50498 c Valves shall be of the following Type, style and sizes: Type CI - Cast Iron (Styles 1 or 2) Type BZ - Bronze (Styles 1 or 2) Type PV - Polyv
8、inyl Chloride PVC (Style 3 only) Style 1 Style 2 Flanged end connection Style 3 Internally threaded end connection Solvent welded End Connection (Style 3 only) Size A 1/2 inch Size H 4 inch Size O 16 inch B 3/4 inch I 5 inch P 18 inch C 1 inch J 6 inch Q 20 inch D 1-1/2 inch K 8 inch R 24 inch E 2 i
9、nch L 10 inch S 30 inch F 2-1/2 inch M 12 inch G 3 inch N 14 inch Contractor certification. substantiating evidence that the product offered meets the salient characteristics of this CID and that the product conforms to the producers own drawings, specifications, standards, -and quality assurance pr
10、actices. The Government reserves the right to require proof of such conformance prior to first delivery and thereafter as may be otherwise provided for under the provisions of the contract. The contractor shall certify and maintain O Metric products. Products manufactured to metric dimensions will b
11、e considered on an equal basis with those manufactured using inch-pound units, provided they fall within specified tolerances using conversion tables contained in the latest revision of Federal Standard FED-STD-376, and all other requirements of this CID are met. If a product is manufactured to metr
12、ic dimensions and those dimensions exceed the tolerances specified in the inch/pound units, a request should be made to the contracting officer to determine if the product is acceptable. The contracting officer has the option of accepting or rejecting the product. Regulatory reauirements, recovered
13、materials in accordance with Public Law 94-580 to the maximum extent practicable. The offeror/contractor is encouraged to use - Preservation. packaging, packinn. labeling and markinq. Preservation, packaging, packing, labeling, and marking shall be as specified in the contract or order, 2 Provided b
14、y IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-50q78 48 7777774 0056329 2 A-A-50498 Part identification number. The following part identification numbering procedure is for Government purposes and does not constitute a requirement for contractor. Part ide
15、ntification designation AXXXXX-U-X-X II III III Designates. a CID II I III CID Number I III III Type III II Style II Notes. Purchases should specify type, style and size. ANSI standards are available from the American National Standards Institute, 1430 Broadway, New York, NY 10018. FED-STD-376 is av
16、ailable from the Standardization Documents Order Desk, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094. MILITARY INTERESTS: Custodians rlr , Army - ME Navy - YD Air Force - 99 Review Activities Army - GL Navy - MC Air Force - 82 DLA - CS User Activities: Navy - SH, OS CIVIL AGNECY COORDINA
17、TING ACITIVITES: GSA - FSS PREPARING ACTIVITY: Navy - YD (Project 4820-0579) Orders for this publication are to be placed with General Services Administration, acting as an agent for the Superintendent of Documents. See section 2 of this specification to obtain extra copies and other documents referenced herein. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
