1、 AWWA Standard SM Rubber-Seated Butterfly Valves Effective date:Oct. 1, 2015. First edition approved by AWWA Board of Directors May 27, 1954. This edition approved June 7, 2015. Approved by American National Standards Institute May 13, 2015. ANSI/AWWA C504-15 (Revision of ANSI/AWWA C504-10) Copyrigh
2、t 2015 American Water Works Association. All Rights Reserved. ii AWWA Standard This document is an American Water Works Association (AWWA) standard. It is not a specification. AWWA standards describe minimum requirements and do not contain all of the engineering and administrative information normal
3、ly contained in specifications. The AWWA standards usually contain options that must be evaluated by the user of the standard. Until each optional feature is specified by the user, the product or service is not fully defined. AWWA pub- lication of a standard does not constitute endorsement of any pr
4、oduct or product type, nor does AWWA test, certify, or approve any product. The use of AWWA standards is entirely voluntary. This standard does not supersede or take precedence over or displace any applicable law, regulation, or code of any governmental authority. AWWA standards are intended to repr
5、esent a consensus of the water supply industry that the product described will provide satisfactory service. When AWWA revises or withdraws this standard, an official notice of action will be placed in the Official Notice section of Journal - American Water Works Association. The action becomes effe
6、ctive on the first day of the month fol- lowing the month of Journal - American Water Works Association publication of the official notice. American National Standard An American National Standard implies a consensus of those substantially concerned with its scope and provisions. An American Nationa
7、l Standard is intended as a guide to aid the manufacturer, the consumer, and the general public. The existence of an American National Standard does not in any respect preclude anyone, whether that person has ap - proved the standard or not, from manufacturing, marketing, purchasing, or using produc
8、ts, processes, or procedures not conforming to the standard. American National Standards are subject to periodic review, and users are cautioned to obtain the latest editions. Producers of goods made in conformity with an American National Standard are encour - aged to state on their own responsibil
9、ity in advertising and promotional materials or on tags or labels that the goods are produced in conformity with particular American National Standards. Caution n oti Ce : The American National Standards Institute (ANSI) approval date on the front cover of this standard indicates completion of the A
10、NSI approval process. This American National Standard may be revised or withdrawn at any time. ANSI procedures require that action be taken to reaffirm, revise, or withdraw this standard no later than five years from the date of ANSI approval. Purchasers of American National Standards may receive cu
11、rrent information on all standards by calling or writing the American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036; 212.642.4900; or emailing infoansi.org. ISBN-13, print: 978-1-62576-108-8 eISBN-13, electronic: 978-1-61300-344-2DOI: http:/dx.doi.org/10.12999/A
12、WWA.C504.15 All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information or retrieval system, except in the form of brief excerpts or quotations for review purposes, without
13、 the written permission of the publisher. Copyright 2015 by American Water Works Association Printed in USA hours of work by your fellow water professionals. Revenue from the sales of this AWWA material supports ongoing product development. Unauthorized distribution, either electronic or photocopied
14、, is illegal and hinders AWWAs mission to support the water community. This AWWA content is the product of thousands of Copyright 2015 American Water Works Association. All Rights Reserved. iii Committee Personnel The AWWA Standards Committee on Butterfly Valves, which reviewed and approved this sta
15、n- dard, had the following personnel at the time of approval: Mark MacConnell, Chair General Interest Members A. Ali, ADA Consulting, Surrey, B.C., Canada (AWWA) M.D. Bennett, MWH, Cleveland, Ohio (AWWA) B.E. Bosserman, Consultant, Mission Viejo, Calif. (AWWA) J. Hebenstreit, Underwriters Laboratori
16、es Inc., Northbrook, Ill. (AWWA) F.L. Hinker, Consulting Engineer, Santa Rosa, N.M. (AWWA) M.C. Johnson, Utah State University, Logan, Utah (AWWA) T. Jordan, HDR, Denver, Colo. (WEF) T.J. McCandless,* Standards Engineer Liaison, AWWA, Denver, Colo. (AWWA) W. Rahmeyer, Utah State University, Logan, U
17、tah (AWWA) U. Sant, AECOM, Fort Worth, Texas (AWWA) L. Thomas,* Standards Council Liaison, Stanley Consultants, Crystal Lake, Ill. (AWWA) R.A. Ward, Springfield, Vt. (AWWA) Producer Members A. Abouelleil, Henry Pratt Company, Aurora, Ill. (AWWA) S. Allen, Bray Controls, Jonesboro, Ark. (AWWA) J.V. B
18、allun, Val-Matic Valve (2) are relatively easy to operate, even with large pressure differentials across the valves; and (3) require relatively little space for installation. I.B. History. The need for standardization of butterfly valves was recognized by the American Water Works Association (AWWA)
19、in June 1953. The committee appointed for the task of standardization developed AWWA C504, which was approved as tentative and published in September 1954. Four years later, in 1958, the tentative standard was accepted as a standard. The 1954 tentative standard was written to describe the then-avail
20、able types of standard rubber-seated butterfly valves that had been in successful operation for at least five years prior to 1954. The standard established three pressure and two velocity clas- sifications, standards for materials, laying lengths, minimum body and disc designs, and actuator sizes fo
21、r valves having rubber seats in the valve body. Since the publication of AWWA C504 in 1954, butterfly-valve designs have been improved and refined. In September 1962, a new committee was charged with the task of reviewing AWWA C504 and recommending revisions to the standard in order to make it compa
22、tible with then-current valve designs. Generally, modern butterfly-valve designs for water service include cast-body construction in 25-psi (172-kPa), 75-psi (517-kPa), 150-psi (1,034-kPa), and 250-psi (1,723-kPa) pressure classes; flanged, mechanical-joint, and wafer bodies; rubber seats in valve b
23、odies or on the valve discs; and operating conditions (limited by the design shutoff pressure and velocities of water flow) that produce torques considered maxi- mum for the shaft size used. * American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036. Copyright 201
24、5 American Water Works Association. All Rights Reserved. viii Revisions in the 1970 edition were initiated to minimize the corrosion of seating surfaces, to provide more adequate requirements for stainless steel, and to provide for painting of valve interiors with asphalt varnish. Revisions in 1974
25、and 1980 provided fine-tuning of the provisions of the standard. Major changes included addition of provisions concerning the connection between shaft and disc and the use of carbon-steel shafts with stainless-steel journals. Revisions to the 1987 edition included using the word “actuator” rather th
26、an “operator” and provided definitions of valve classifications. Major changes included the addition of certain sprayed-metal seat surfaces and nonmetallic cylinder components as acceptable materials. Appendix B (now appendix A), Installation, Operation, and Maintenance of Rubber-Seated Butterfly Va
27、lves, was added. Revisions to the 1994 edition included the deletion of appendix A for calculating torques, the addition of soft metrication, reference to actuator requirements given in ANSI/AWWA C540, Power-Actuating Devices for Valves and Hydrants, introduction of Class 250 valves, and adoption of
28、 additional materials and material requirements. Revisions to the 2000 edition included: revised material references to use the unified numbering system (UNS) designations, added ductile iron as an acceptable material for actuator worm gears in buried service, allowed for the use of the valves from
29、the proof-of- design tests to be rebuilt and used as production valves, and added advisory text on valve and adjacent pipe installation. The eighth edition of ANSI/AWWA C504 was approved by the AWWA Board of Directors on Feb. 12, 2006. The ninth edition of ANSI/AWWA C504 was approved on June 20, 201
30、0. This tenth edition added updated actuator requirements and was approved on June 7, 2015. 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 st
31、andards and a certification program for direct and indirect drinking water additives. Other members of the original consortium included the Water Research Foundation (formerly AwwaRF) and the Conference of State Health and Environmental Managers (COSHEM). The American Water Works Association (AWWA)
32、and the Association of State Drinking Water Administrators (ASDWA) joined later. In the United States, authority to regulate products for use in, or in contact with, drinking water rests with individual states.* Local agencies may choose to impose * Persons outside the United States should contact t
33、he appropriate authority having jurisdiction. Copyright 2015 American Water Works Association. All Rights Reserved. ix requirements more stringent than those required by the state. To evaluate the health effects of products and drinking water additives from such products, state and local agencies ma
34、y use various references, including 1. An advisory program formerly administered by USEPA, Office of Drinking Water, discontinued on Apr. 7, 1990. 2. Specific policies of the state or local agency. 3. Two standards developed under the direction of NSF * : NSF/ANSI 60, Drinking Water Treatment Chemic
35、alsHealth Effects, and NSF/ANSI 61, Drinking Water System ComponentsHealth Effects. 4. Other references, including AWWA standards, Food Chemicals Codex, Water Chemicals Codex, and other standards considered appropriate by the state or local agency. Various certification organizations may be involved
36、 in certifying products in accor- dance with NSF/ANSI 61. Individual states or local agencies have authority to accept or accredit certification organizations within their jurisdictions. Accreditation of certi- fication organizations may vary from jurisdiction to jurisdiction. Annex A, “Toxicology R
37、eview and Evaluation Procedures,” to NSF/ANSI 61 does not stipulate a maximum allowable level (MAL) of a contaminant for substances not regulated by a USEPA final maximum contaminant level (MCL). The MALs of an unspecified list of “unregulated contaminants” are based on toxicity testing guidelines (
38、noncarcinogens) and risk characterization methodology (carcinogens). Use of Annex A procedures may not always be identical, depending on the certifier. ANSI/AWWA C504 does not address additives requirements. Thus, users of this standard should consult the appropriate state or local agency having jur
39、isdiction in order to 1. Determine additives requirements, including applicable standards. 2. Determine the status of certifications by parties offering to certify products for contact with, or treatment of, drinking water. 3. Determine current information on product certification. In an alternative
40、 approach to inadvertent drinking water additives, some juris- dictions (including California, Maryland, Vermont, and Louisiana at the time of this writing) are calling for reduced lead limits for materials in contact with pota- ble water. Various third-party certifiers have been assessing products against these * NSF International, 789 North Dixboro Road, Ann Arbor, MI 48105. Both publications available from National Academy of Sciences, 550 Fifth Street, NW, Washington, DC 20418. Copyright 2015 American Water Works Association. All Rights Reserved.
