1、AWWA Standard SM Hydraulic and Pneumatic Cylinder and Vane-Type Actuators for Valves and Slide Gates Effective date: Sept. 1, 2016. First edition approved by AWWA Board of Directors Jan. 27, 2008. This edition approved Jan. 16, 2016. Approved by American National Standards Institute Jan. 8, 2016. AN
2、SI/AWWA C541-16 (Revision of ANSI/AWWA C541-08) Copyright 2016 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 o
3、f the engineering and administrative 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 pub- lication
4、of a standard does not constitute 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 gove
5、rnmental authority. AWWA standards are intended to represent 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
6、 Journal American Water Works Association. The action 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 substantiall
7、y concerned with its scope and provisions. An American 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 ap - proved the standard or n
8、ot, from manufacturing, marketing, purchasing, or using products, 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 Nationa
9、l Standard are encour - aged to state on their own responsibility 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
10、the front cover of this standard indicates completion 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 publicati
11、on. Purchasers of American National Standards may receive 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. ISBN-13, print: 978-1-62576-143-9 eISBN-13, e
12、lectronic: 978-1-61300-368-8DOI: http:/dx.doi.org/10.12999/AWWA.C541.16 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
13、of brief excerpts or quotations for review purposes, without the written permission of the publisher. Copyright 2016 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.
14、 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 Copyright 2016 American Water Works Association. All Rights Reserved.iii Committee Personnel The AWWA Standards Subcommi
15、ttee on Hydraulic and Pneumatic Actuators, which reviewed and approved this standard, had the following personnel at the time of approval: Mike Ford, Chair J.V. Ballun, Val-Matic Valve (2) if threaded, thread type, pitch, and lead; (3) dimensions of stem and keyway (if applicable); and (4) orientati
16、on (i.e., clockwise to close or clock- wise to open). d. Weight of gate and stem for slide gate. Copyright 2016 American Water Works Association. All Rights Reserved.ix e. Failure mode on loss of power: fail open, fail close, fail freeze, or fail in last position on loss of driver medium pressure, c
17、ontrol signal, or both. f. Seating/unseating torque in foot-pounds (newton-meters), maximum dynamic torque in foot-pounds (newton-meters), and when applicable, thrust in pounds (newtons) (Sec. 4.3.1.3). g. Minimum hydraulic or pneumatic pressure available for sizing actuator (Sec. 4.3.1.2). h. Maxim
18、um torque/thrust capability of the valve or slide gate (Sec. 4.3.2). i. Direction of rotation of actuator handwheel to open valve or slide gate if other than counterclockwise (Sec. 4.4.10.8). 4. Specific actuator and equipment data. See Table A.1, Actuator Data Form, appendix A. a. Special auxiliari
19、es, such as fail-safe, spring-return pneumatic (Sec. 4.4.7 .1 5, 4.4.8.12, and 4.4.9.7), or manual (mechanical) override (Sec. 4.4.10). i. Fail-safe operation using a spring-return option allows a valve/ actuator assembly to “fail” to a specified position, usually fully closed or fully open, on loss
20、 of driver medium pressure. For rotary valves, the rotation of the spring stroke must be specified in the purchase documents. ii. Spring-return actuators and cylinders have a “starting torque” and “ending torque.” Starting torque refers to the torque output of the actuator or cylinder at the beginni
21、ng of the air stroke or spring stroke, as specified in the manufacturers literature. Ending torque refers to the torque output of the actuator or cylinder at the end of the air stroke or spring stroke, as specified in the manufacturers literature. Some actuators and cylinders have different starting
22、 torques and ending torques for the air and spring strokes. iii. Declutchable manual gear override. When specified by the pur- chaser, a declutchable manual gear override shall be provided. The user may consider a declutchable manual gear override with a handwheel when there may be the need of manua
23、lly operating a valve equipped with a hydraulic or pneumatic actuator, for example, in the event of a power outage. For rotary valves, it is good practice to mount the manual gear override between the hydraulic or pneumatic actuator and the valve to provide true stand-alone capability in the event o
24、f actuator failure or servicing. Handwheel rim pull force is determined by the effort required on the handwheel to operate the valve or gate closure member. Where the handwheel is a spoke design rather than a rim design, handwheel input force should be measured at 2 in. from the far end of the spokes. While this standard limits handwheel rim pull (Sec. 4.4.7 .16 and Copyright 2016 American Water Works Association. All Rights Reserved.
