1、Laboratory Measurement ofAerodynamic Noise Generatedby Control ValvesApproved 31 August 1997ISA75.071997FormerlyISAS75.071997STANDARDISA The Instrumentation,Systems, andAutomation Society TMISA-75.07-1997, Laboratory Measurement of Aerodynamic Noise Generated by Control ValvesISBN: 1-55617-653-8Copy
2、right 1997 by the Instrument Society of America. All rights reserved. Printed in the United States of America. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), wit
3、hout the prior written permission of the Publisher.ISA67 Alexander DriveP. O. Box 12277Research Triangle Park, North Carolina 27709ISA-S75.07-1997 3PrefaceThis preface, as well as all footnotes and annexes, is included for information purposes only and is not part of ISA-75.07-1997.This Standard has
4、 been prepared as part of the service of ISA, the international society for measurement and control, toward a goal of uniformity in the field of instrumentation. To be of real value, this document should not be static but should be subject to periodic review. Toward this end, the Society welcomes al
5、l comments and criticisms and asks that they be addressed to the Secretary, Standards and Practices Board, ISA; 67 Alexander Drive; P.O. Box 12277; Research Triangle Park, NC 27709; Telephone (919) 990-9227; Fax (919) 549-8288; Internet: standardsisa.org.The ISA Standards and Practices Department is
6、 aware of the growing need for attention to the metric system of units in general, and the International System of Units (SI) in particular, in the preparation of instrumentation standards, recommended practices, and technical reports. The Department is further aware of the benefits to USA users of
7、ISA standards of incorporating suitable references to the SI (and the metric system) in their business and professional dealings with other countries. Toward this end, this Department will endeavor to introduce SI-acceptable metric units in all new and revised standards to the greatest extent possib
8、le. Standard for Use of the International System of Units (SI): The Modern Metric System, published by the American Society for Testing 2) pressure drop (P) and/or downstream pressure;3) upstream fluid temperature;4) flow rate;5) valve travel (percent of full travel 2%);6) valve Cat the test travel
9、positions(s);7) acoustic data consisting of the “A-weighted“ source level and either a 1/3-octave or full-octave band analysis which shall be recorded over the frequency range of 180 Hz (250 Hz for full-octave band, or 200 Hz for 1/3-octave band center frequency) to 22 400 Hz (16 000 Hz for full-oct
10、ave band, or 20 000 Hz for 1/3-octave band center frequency). Narrowband data may be obtained when further frequency resolution is desired.8) description of the complete test specimen;9) description of the test facility, including:a) piping and instrumentation schematic, including the pipe size, mat
11、erial, and wallthickness;b) description of the environmental chamber (if used); andISA-S75.07-1997 15c) dimension sketch of the test facility.10) test fluid and its molecular weight or specific gravity;11) instruments used (manufacturer, model number, span, accuracy specification);12) microphone pos
12、ition; and13) any deviations from this standard.ISA-S75.07-1997 17Annex A ReferencesAMERICAN NATIONAL STANDARDS INSITITUTE (ANSI)ANSI-S1.13-1971 Methods for the Measurement of Sound Pressure Levels(R1986)ANSI-S1.4-1983 Specification for Sound Level MetersAvailable from: American National Standards I
13、nstitute11 West 42nd StreetNew York, NY 10036 Tel: (212) 642-4900ISAANSI/ISA S75.02 Control Valve Capacity Test Procedures, 1996Available from: ISA67 Alexander DriveP.O. Box 12277Research Triangle Park, NC 27709 Tel: (919) 549-8411NATIONAL FLUID POWER ASSOCIATION (NFPA)ANSI/(NFPA) Hydraulic Fluid Po
14、wer Valves Pressure Differential FlowT3.5.28 R1-1997 Characteristic Method of Measuring and ReportingAvailable from: NFPA3333 N Mayfair RoadSuite 311Milwaukee, WI 53222-3219 Tel: (414) 778-3344Developing and promulgating technically sound consensus standards, recommended practices, and technical rep
15、orts is one of ISAs primary goals. To achieve this goal the Standards and Practices Department relies on the technical expertise and efforts of volunteer committee members, chairmen, and reviewers.ISA is an American National Standards Institute (ANSI) accredited organization. ISA administers United
16、States Technical Advisory Groups (USTAGs) and provides secretariat support for International Electrotechnical Commission (IEC) and International Organization for Standardization (ISO) committees that develop process measurement and control standards. To obtain additional information on the Societys standards program, please write:ISAAttn: Standards Department67 Alexander DriveP.O. Box 12277Research Triangle Park, NC 27709ISBN: 1-55617-653-8
