AWWA C530-2017 Pilot-Operated Control Valves.pdf

1、AWWA Standard SM Pilot-Operated Control Valves Effective date: Sept. 1, 2017. First edition approved by AWWA Board of Directors June 24, 2007. This edition approved June 11, 2017. Approved by American National Standards Institute April 6, 2017. ANSI/AWWA C530-17 (Revision of ANSI/AWWA C530-12) Copyr

2、ight 2017 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 nor

3、mally 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

4、 product 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 r

5、epresent a consensus of the water industry that the product described will provide satisfactory ser- vice. When AWWA revises or withdraws this standard, an official notice of action will be placed on the first page of the Official Notice section of Journal American Water Works Association. The actio

6、n becomes effective on the first day of the month following 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 Americ

7、an National 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 approved the standard or not, from manufacturing, marketing, purchasing, or using

8、 products, processes, or proce - dures not conforming to the standard. American National Standards are subject to periodic review, and users are cau- tioned to obtain the latest editions. Producers of goods made in conformity with an American National Standard are encouraged to state on their own re

9、sponsibility 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

10、 of the ANSI 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 publication. Purchasers of American National Standards may rec

11、eive current 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. hours of work by your fellow water professionals. Revenue from the sales of this AWWA material sup

12、ports ongoing product development. Unauthorized distribution, either electronic or photocopied, is illegal and hinders AWWAs mission to support the water community. This AWWA content is the product of thousands of ISBN-13, print: 978-1-62576-258-0 eISBN-13, electronic: 978-1-61300-445-6 DOI:http:/dx

13、.doi.org/10.12999/AWWA.C530.17 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 revie

14、w purposes, without the written permission of the publisher. Copyright 2017 by American Water Works Association Printed in USA Copyright 2017 American Water Works Association. All Rights Reserved. iii Committee Personnel The AWWA Standards Committee on Pilot-Operated Control Valves, which reviewed a

15、nd approved this standard, had the following personnel at the time: Doug Rhodes, Chair General Interest Members A. Ali, ADA Consulting, Surrey, B.C., Canada (AWWA) M.L. Altland, Hatch Mott Macdonald, Iselin, N.J. (AWWA) F.H. Hanson, Albert A. Webb Associates, Riverside, Calif. (AWWA) D. Kronebusch,

16、Opus International Consultants (Canada) Ltd., Prince George, B.C., Canada (AWWA) T.J. McCandless,* Standards Engineer Staff Advisor, AWWA, Denver, Colo. (AWWA) E.M. Norum, California State University Center for Irrigation Technology, Fresno, Calif. (AWWA) D. Rhodes, Consultant, Kelowna, B.C., Canada

17、 (AWWA) R.M. Schwecke, HDR Engineering Inc., Phoenix, Ariz. (AWWA) J. Vorheis, CH2M, San Antonio, Texas (AWWA) R.A. Waggenspack, Owen at the first inaugural meeting in June 2003, a subcommittee was appointed by the chair to develop a standard. The first edition was approved by the AWWA Board of Dire

18、ctors on June 24, 2007. The second edition was approved on June 10, 2012. This edition was approved on June 11, 2017. 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 voluntar

19、y third-party consensus standards 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

20、 Works Association (AWWA) 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 * American National Standar

21、ds Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036. Persons outside the United States should contact the appropriate authority having jurisdiction. Copyright 2017 American Water Works Association. All Rights Reserved. viii requirements more stringent than those required by the state

22、. To evaluate the health effects of products and drinking water additives from such products, state and local agencies may use various references, including 1. Specific policies of the state or local agency. 2. Two standards developed under the direction of the NSF*: NSF/ANSI 60, Drinking Water Trea

23、tment ChemicalsHealth Effects, and NSF/ANSI 61, Drinking Water System ComponentsHealth Effects. 3. 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

24、 be involved in certifying products in accordance with NSF/ANSI 61. Individual states or local agencies have authority to accept or accredit certification organizations within their jurisdictions. Accreditation of certification organizations may vary from jurisdiction to jurisdiction. Annex A, “Toxi

25、cology Review and Evaluation Procedures,” of 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 guid

26、elines (noncarcinogens) and risk characterization methodology (carcinogens). Use of Annex A procedures may not always be identical, depending on the certifier. ANSI/AWWA C530 does not address additive requirements. Users of this standard should consult the appropriate state or local agency having ju

27、risdiction in order to 1. Determine additive requirements, including applicable standards. 2. Determine the status of certification by parties offering to certify products for contact with, or treatment of, drinking water. 3. Determine current information on product certification. II. Special Issues

28、. Conditions under which the pilot-operated control valve is to be operated must be evaluated carefully by the purchaser. This evaluation must include determination of the hydraulic characteristics of the system in which the valve will be installed and the pilot devices required for operation of the

29、 valve, including (1) maximum and static differential pressures across the valve and (2) the range of flow rates through the valve under the most adverse operating conditions. Velocities exceeding 15 ft/sec (4.6 m/sec) should be discussed with the manufacturer. When * NSF International, 789 North Di

30、xboro Road, Ann Arbor, MI 48113. Both publications available from National Academy of Sciences, 500 Fifth Street, NW, Washington, DC 20001. Copyright 2017 American Water Works Association. All Rights Reserved. ix selecting a type of valve, it must be noted that there are various types of control val

31、ves with different combinations of pilots and actuation mechanisms. II.A. 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

32、chloramines. Documented research has shown that elastomers such as gaskets, seals, valve seats, and encapsulations may be degraded when exposed to chlorine or chloramines. The impact of degradation is a function of the type of elastomeric material, chemical concentration, contact surface area, elast

33、omer cross section, and environmental conditions, as well as temperature. Careful selection of and specifications for elastomeric materials and the specifics of their application for each water system component should be considered to provide long-term usefulness and minimum degradation (swelling, l

34、oss of elasticity, or softening) of the elastomer specified. 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. III.A. Purchaser Options and

35、 Alternatives. The following information should be provided by the purchaser. 1. Standard used, that is, ANSI/AWWA C530, Pilot-Operated Control Valves, of latest revision. 2. Whether compliance with NSF/ANSI 61, Drinking Water System ComponentsHealth Effects, is required. 3. Size of valve. 4. Quanti

36、ty required. 5. Maximum nonshock inlet pressure. 6. Minimum and maximum pressure drop across the seat. 7. Maximum head loss, if required. 8. Maximum transient pressure and characteristics, if known. 9. Requirements for anticavitation trim material. 10. State special devices or features, if required,

37、 including number and location of isolation valves for pilot lines, type of pilot filter element, openclose time speed control requirements, position indication, remote control devices, remote and externally mounted three-position control switches (opencloseauto), pressure gauges, and/or pressure transmitters on inlet and outlet flange taps. 11. Consideration relating to anticipated problems with rubber components exposed to line content containing chlorine, chloramines, or other chemicals. If Copyright 2017 American Water Works Association. All Rights Reserved.