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AWWA C504-23 Rubber-Seated Butterfly Valves, 2023
- Foreword [Go to Page]
- I. Introduction. [Go to Page]
- I.A. Background. Butterfly valves are generally used for pipelines carrying liquids and gases. Manufacturers of butterfly valves developed tight-closing, rubber-seated types for cooling water systems and power stations. Since 1940, most new valves install [Go to Page]
- I.B. History. The need for standardization of butterfly valves was recognized by the American Water Works Association (AWWA) in June 1953. [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. General. Conditions under which a valve is to be operated must be evaluated carefully by the purchaser. The evaluations must include the determination of the hydraulic characteristics of the system in which the valve will be installed and the operat [Go to Page]
- II.B. Buried Valves Larger Than 48 In. Valves in this standard are provided with flanged ends. In buried applications, the purchaser is advised to consider providing means to accommodate issues such as differential settlement, capability to remove the val [Go to Page]
- II.C. Advisory Information on Product Application. This standard does not describe all possible applications or manufacturing technologies. The purchaser should identify special requirements and required deviations from this standard and include appropria
- II.D. Permeation. The selection of materials is critical for raw water, potable water, wastewater, and reclaimed water service and distribution piping in locations where there is likelihood the pipe will be exposed to significant concentrations of polluta [Go to Page]
- II.E. Effects of Manual or Power Actuation Stroke Time. When specifying manual, cylinder, and electric actuators in items 13, 14, 15, 16, and 17 of Sec. III.A, consideration should be given to the effects of valve operating speed on the pipeline hydraulic
- II.F Valve Discs and Piping Design. The discs of butterfly valves, when in the fully open position, protrude into the adjacent upstream and downstream piping or other adjacent devices. This can especially be an issue with wafer-style butterfly valves, whe
- II.G Bolting Gray Cast Iron Flanges to Steel Flanges. The following recommendations are made for the use of high strength bolting used with either ASME or AWWA steel flanges when bolting to low ductility gray cast iron valve flanges. The ASME B16.1 standa
- II.H. 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 [Go to Page]
- II.I. Finite Element Analysis. Advisory Information on Valve Design. Calculation tools like FEA software can be used as a supplement to the equations, wall thickness tables, and size tables when listed in this standard for stress design. These calculation
- 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 in the purchase documents: [Go to Page]
- III.B. Modification to Standard. Any modification to the provisions, definitions, or terminology in this standard must be provided by the purchaser.
- IV. Major Revisions. The major revisions made to the standard in this edition include the following:
- V. Comments. If you have any comments or questions about this standard, please contact AWWA Engineering and Technical Services at 303.794.7711; write to the department at 6666 West Quincy Avenue, Denver, CO 80235-3098; or email at standards@awwa.org.
- 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 Materials
- Sec. 4.2 General Design
- Sec. 4.3 Workmanship
- Sec. 4.4 Coatings
- SECTION 5: VERIFICATION
- Sec. 5.1 Testing by the Manufacturer
- Sec. 5.2 Notice of Nonconformance
- SECTION 6: DELIVERY
- Sec. 6.1 Marking Requirements
- Sec. 6.2 Shipping Requirements
- Sec. 6.3 Affidavit of Compliance [Go to Page]
- Installation, Operation, and Maintenance of
Rubber-Seated Butterfly Valves [Go to Page]
- SECTION A.1: GENERAL
- SECTION A.2: UNLOADING
- SECTION A.3: STORAGE
- SECTION A.4: �INSPECTION PRIOR TO INSTALLATION
- SECTION A.5: INSTALLATION
- SECTION A.6: FIELD TESTING
- SECTION A.7: OPERATION
- SECTION A.8: MAINTENANCE [Go to Page]
