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AWWA C500-19 Metal-Seated Gate Valves for Water Supply Service, 2019
- Foreword [Go to Page]
- I. Introduction. [Go to Page]
- I.A. Background. The first AWWA standard for gate valves was adopted June 24, 1913. It was reissued without change on June 9, 1916, as part of AWWA Standard Specifications for Hydrants and Valves. At the time of the next revision in 1938, the standard for [Go to Page]
- I.B. History. The dates of approval and numerical designation of past editions of ANSI/AWWA C500 are listed below. Dates shown in parentheses are the effective dates for use of the revised editions. [Go to Page]
- I.C. Acceptance. In May 1985, the US Environmental Protection Agency (USEPA) entered into a cooperative agreement with a consortium led by NSF International (NSF) to develop voluntary third-party consensus standards and a certification program for direct
- II. Special Issues. [Go to Page]
- II.A. Field Testing and Operating Gate Valves at High Pressure. [Go to Page]
- II.B Chlorine and Chloramine Degradation of Elastomers. The selection of materials is critical for water service and distribution piping in locations where there is a possibility that elastomers will be in contact with chlorine or chloramines. Documented
- III. Use of This Standard. It is the responsibility of the user of an AWWA standard to determine that the products described in that standard are suitable for use in the particular application being considered. [Go to Page]
- III.A. Purchaser Options and Alternatives. The following information should be provided by the purchaser: [Go to Page]
- III.B. Modification to Standard. Any modification of the provisions, definitions, or terminology in this standard must be provided by the purchaser.
- IV. Major Revisions. Major changes made to the standard in this revision include the following:
- V. Comments. If you have any comments or questions about this standard, please call AWWA Engineering and Technical Services at 303.794.7711, FAX at 303.795.7603, write to the department at 6666 West Quincy Avenue, Denver, CO 80235-3098, or e-mail at stand
- AWWA Standard
- SECTION 1: GENERAL
- Sec. 1.1 Scope
- Sec. 1.2 Purpose
- Sec. 1.3 Application
- SECTION 2: REFERENCES
- SECTION 3: DEFINITIONS
- SECTION 4: REQUIREMENTS
- Sec. 4.1 Data to Be Supplied
- Sec. 4.2 Materials
- Sec. 4.3 General Design [Go to Page]
- Table 1 Valve stem design torque [Go to Page]
- Table 2 Minimum waterway sizes
- Table 3 Minimum thickness of valve body and bonnet [Go to Page]
- Table 8 Minimum diameter of stem and minimum number of turns to open
- Table 9 Stainless-steel valve stem alloys
- SECTION 6: DELIVERY
- Sec. 6.1 Marking
- Sec. 6.2 Preparation for Shipment
- Sec. 6.3 Affidavit of Compliance [Go to Page]
- Installation, Operation, and Maintenance of Gate Valves [Go to Page]
