1、ANSI/AWWA C519-18(First Edition)AWWA StandardSMHigh-Performance Waterworks Butterfly Valves3 In. (75 mm) Through 60 In. (1,500 mm)Effective date: Sept. 1, 2018First edition approved by AWWA Board of Directors June 9, 2018.This edition approved June 9, 2018.Approved by American National Standards Ins
2、titute May 18, 2018.Copyright 2018 American Water Works Association. All Rights Reserved. iiAWWA StandardThis 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 adminis
3、trative information normally 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 publication of a standard does not constitu
4、te endorsement of any 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 standa
5、rds are intended to represent a consensus of the water 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 AWWA. The action becomes effective on the
6、first day of the month following the month of Journal AWWA publication of the official notice.American National StandardAn American National Standard implies a consensus of those substantially concerned with its scope and provisions. An American National Standard is intended as a guide to aid the ma
7、nufacturer, 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 products, processes, or procedures not conforming to the
8、 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 encouraged to state on their own responsibility in advertising and promotional materials or on ta
9、gs or labels that the goods are produced in conformity with particular American National Standards.Caution Notice: The American National Standards Institute (ANSI) approval date on the front cover of this standard indicates completion of the ANSI approval process. This American National Standard may
10、 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 current information on all standards by calling or writing
11、the American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036; (212) 642-4900, or e-mailing infoansi.org.ISBN-13, print: 978-1-62576-310-5 eISBN-13, electronic: 978-1-61300-485-2DOI: http:/dx.doi.org/10.12999/AWWA.C519.18All rights reserved. No part of this publica
12、tion may be reproduced or transmitted in any form or by any means, electronic or mechanical, including scanning, recording, or any information or retrieval system. Reproduction and commercial use of this material is prohibited, except with written permission from the publisher.Copyright 2018 by Amer
13、ican Water Works Association Printed in USAIf you are interested in using any part of this publication for training, creating a derivative work, or for any commercial use, written permission from AWWA is required. Please send your request to permissionsawwa.org. Copyright 2018 American Water Works A
14、ssociation. All Rights Reserved. iiiCommittee PersonnelThe AWWA Standards Sub-Committee for High-Performance Waterworks Butterfly Valves, which prepared and reviewed this standard, had the following personnel at the time of approval:Albert W. Libke, ChairGeneral Interest MembersA. Ali, ADA Consultin
15、g Ltd., Surrey, B.C.F.L. Hinker, Santa Rosa, N.M.M.C. Johnson, Utah State University, Water Research Lab., Logan, UtahM. MacConnell, Burnaby, B.C.T.J. McCandless,*Standards Engineer Liaison, AWWA, Denver, Colo.Producer MembersA. Abouelleil, Henry Pratt Company, Aurora, Ill.S. Allen, Bray Controls, H
16、ouston, Tex.H. Herold, VAG, Mannheim, GermanyJ. Holstrom, Val-Matic Valve (2) provide tight shutoff; (3) are relatively easy to operate, even with large pressure differentials across the valves; and (4) require relatively little space for installation.I.B. History. The need for standardization of hi
17、gh-performance butterfly valves for waterworks service was recognized by AWWA in 2010.The 2018 standard was written to describe the then-available types of standard high-performance butterfly valves that had been in successful operation for at least ten years. The standard established three pressure
18、 classifications, three fluid velocity classifications, standards for materials, laying lengths, minimum body and disc designs, and actuator requirements for high-performance butterfly valves.Generally, modern high-performance butterfly-valve designs for water service include cast or welded body con
19、struction in 150 psi (1,034 kPa), 275 psi (1,896 kPa), and 500 psi (3,447 kPa) pressure ratings; flanged, lugged-wafer, and wafer bodies; seats in valve bodies or on the valve discs; and operating conditions (limited by the materials, design shutoff pressure, and velocities of water flow) that may p
20、roduce torques considered maximum for the shaft size used.This edition of ANSI/AWWA C519 was approved by the AWWA Board of Directors on June 9, 2018.I.C. Acceptance. In May 1985, the US Environmental Protection Agency (USEPA) entered into a cooperative agreement with a consortium led by NSF Internat
21、ional (NSF) to develop voluntary third-party consensus standards and a certification program for direct and indirect drinking water additives. Other members of * American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036.Copyright 2018 American Water Works Associati
22、on. All Rights Reserved. xthe original consortium included the Water Research Foundation (formerly AwwaRF), and the Conference of State Health and Environmental Managers (COSHEM). The American Water Works Association and the Association of State Drinking Water Administrators (ASDWA) joined later.In
23、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 requirements more stringent than those required by the state. To evaluate the health effects of products and drinking water additives fro
24、m such products, state and local agencies may use various references, including1. Specific policies of the state or local agency.2. Two standards developed under the direction of NSF: NSF/ANSI60, Drinking Water Treatment ChemicalsHealth Effects, and NSF/ANSI 61, Drinking Water System ComponentsHealt
25、h 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 be involved in certifying products in accordance with NSF/ANSI 61. Individual states,
26、provinces, or local agencies have authority to accept or accredit certification organizations within their jurisdiction. Accreditation of certification organizations may vary from jurisdiction to jurisdiction.ANSI/AWWA C519 does not address additives requirements. Thus, users of this standard should
27、 consult the appropriate state or local agency having jurisdiction in order to1. 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 i
28、nformation on product certification.II. Special Issues.II.A. General. The purchaser should carefully evaluate conditions under which a valve is to be operated. The evaluations must include the determination of the hydraulic characteristics of the system in which the valve will be installed and the *
29、 Persons outside the United States should contact the appropriate authority having jurisdiction.NSF International, 789 N. Dixboro Road, Ann Arbor, MI 48105.American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036.Both publications available from National Academy o
30、f Sciences, 500 Fifth Street, NW, Washington, DC 20001.Copyright 2018 American Water Works Association. All Rights Reserved. xioperation of the valve (open-closed, throttling, or modulating service), including (1) the maximum transient and static differential pressure across the valve disc and (2) f
31、low through the valve under the most adverse operating conditions.Torque requirements for valve operation vary considerably with the seat design or type, differential pressure across the valve, fluid velocity, fluid temperature, and upstream piping conditions.Flow direction is important in the insta
32、llation and use of a butterfly valve. Performance and sealing characteristics of some valves vary with direction of flow. Flow direction can affect the torque requirements and throttling characteristics of valves with offset discs or discs that do not have identical surface configurations on each si
33、de. Many offset seat-type butterfly valves have different sealing characteristics on one side versus the other. A manufacturer may have a recommended high-pressure sealing side for long-term reliability.Hydraulic testing, flow capacities, and valve torques are based on the flow upstream of a valve b
34、eing uniform and undisturbed, such as the flow produced by a long length of constant-diameter, straight pipe. Piping configurations that produce a nonuniform or turbulent flow pattern upstream of the valve can increase torque requirements, create damaging vibrations, increase head loss, and increase
35、 stresses in valve components.Some hydraulic systems can produce fluid velocities higher than the maximum of 35 ft/s (10.7 m/s) described in this standard. These design conditions should be clearly specified by the purchaser so that the valve supplier can address materials and actuator issues. Typic
36、ally, high fluid velocities can result from flow control and pressure-reducing applications, pipeline breaks, during firefighting, or in surge-relief applications. The effects of high fluid velocities and asymmetrical turbulent-flow conditions can result in high component stresses, and high torque r
37、equirements, such that the actuator(s) may not be able to hold valve position or control valve opening and closing. These flow conditions are not within the scope of this standard.II.B. Advisory Information on Product Application. This standard does not describe all possible applications or manufact
38、uring technologies. The purchaser should identify special requirements and required deviations from this standard and include appropriate language in purchase documents. Refer to Sec. III.A in this foreword. Other advisory information is provided as follows:1. The maximum anticipated fluid velocity
39、through the valve, maximum nonshock shutoff and differential pressure, water temperature range, and valve classification are used by manufacturers to calculate torque requirements through methods found in AWWA Manual M49Quarter-Turn Valves: Head Loss, Torque, Copyright 2018 American Water Works Asso
40、ciation. All Rights Reserved. xiiand Cavitation Analysis, which then may determine valve operating-component design and actuator sizing. This information should be provided according to items 5, 6, 7, 23, and 24 of Sec. III.A in this foreword. If this information is not provided, a maximum fluid vel
41、ocity of 35 ft/s (10.7 m/s) and maximum pressure classification of 500 psi (3,447 kPa) will be provided with actuators sized for the most severe conditions listed in this standard. This may result in a significant unwarranted expense.Turbulence is also a factor that may affect torque requirements. T
42、urbulence will be considered only if information on piping conditions is provided according to item 27 of Sec. III.A in this foreword.2. This standard limits handwheel rim pull, but not handwheel diameter. A smaller handwheel may require a more expensive actuator requiring more turns. If a large-dia
43、meter handwheel is of concern because of clearance or other limitations, the diameter should be limited to an acceptable dimension according to item 14 of Sec. III.A in this foreword.3. This standard refers to ANSI/AWWA C541Hydraulic and Pneumatic Cylinder and Vane-Type Actuators for Valves and Slid
44、e Gates, which permits the use of some plated components in metallic water-hydraulic cylinder actuators. The purchaser should be aware of the possibility of plating failure, particularly when the operating water is unusually corrosive, resulting in the promotion of material degradation. The purchase
45、r may limit acceptability to cylinders having components that do not depend on plating to resist corrosion according to item 15 of Sec. III.A in this foreword.4. This standard permits polymer and metal seating-surface materials. This standard recommends seating surfaces of reinforced polymer or stai
46、nless steel or nickel-copper alloy in cases where valves are to be operated more frequently than once a month. The purchaser may require these materials for specific applications according to item 11 of Sec. III.A in this foreword.5. This standard also accepts sprayed mating-seat surfaces when the s
47、urfaces are applied under certain conditions. The suitability of this type of surface depends, to a large extent, on the quality of the manufactured product. The purchaser should be aware of the manufacturers previous experience with similar applications. The purchaser may limit acceptability to a s
48、pecific product or application according to item 11 of Sec. III.A in this foreword.6. The material references for metals in Secs. 4.2 and 4.3 of this standard are based on successful experience. There may be instances where the water is corrosive, resulting in the promotion of material degradation,
49、and the listed materials may not be suitable for both the valve and, if applicable, the hydraulic cylinder. If the materials Copyright 2018 American Water Works Association. All Rights Reserved. xiiiare not appropriate for the application, the purchaser should identify in the purchase documents which materials are acceptable and identify any other allowable materials.7. High-performance butterfly valves were developed as steel products, and typically mate with steel and ductile-iron flanges. They generally do not mate to cast iron flanges. Flanges conforming to st
