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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1468 Direct Acting Pressure Reducing and Pressure Restricting Valves Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Jap
2、an, IHS Not for Resale, 12/17/2007 18:30:52 MSTNo reproduction or networking permitted without license from IHS -,-,- UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Copyright Underwriters Laboratories Inc. Provided by IHS under license with
3、 ULLicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 12/17/2007 18:30:52 MSTNo reproduction or networking permitted without license from IHS -,-,- UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Underwriters Laboratories Inc
4、. (UL) 333 Pfi ngsten Road Northbrook, IL 60062-2096 UL Standard for Safety for Direct Acting Pressure Reducing and Pressure Restricting Valves, UL 1468 Fourth Edition, Dated May 13, 2004 Revisions: This Standard contains revisions through and including December 4, 2007 Summary of Topics The followi
5、ng revisions are included: New glossary terms for Residual Pressure and Static Pressure Editorial updates to standard titles Clarifi cation of pressure reducing valve requirements, harmonization of pressure and fl ow limitation requirements with NFPA 14, and added requirements to establish residual
6、pressure values for devices installed in sprinkler systems Revisions to the installation and operating instructions to harmonize with NFPA 14 and to refl ect revisions to requirements for outlet pressure settings UL Standards for Safety are developed and maintained in the Standard Generalized Markup
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9、h a vertical line in the margin and are followed by an effective date note indicating the date of publication or the date on which the changed requirement becomes effective. The following table lists the future effective dates with the corresponding item. DECEMBER 4, 2007 UL 1468tr1 Copyright Underw
10、riters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 12/17/2007 18:30:52 MSTNo reproduction or networking permitted without license from IHS -,-,- UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTI
11、ON WITHOUT PERMISSION FROM UL Future Effective DateReference June 4, 2009Paragraphs 9.2, 9.3, 9.4, 9A.1, and 31.2 and Table 9A.1 The new and revised requirements are substantially in accordance with ULs Proposal(s) on this subject dated August 3, 2007. The revisions dated December 4, 2007 include a
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29、uirements in this Standard are now in effect, except for those paragraphs, sections, tables, fi gures, and/or other elements of the Standard having future effective dates as indicated in the note following the affected item. The prior text for requirements that have been revised and that have a futu
30、re effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. New product submittals made prior to a specifi ed future effective date will be judged under all of the requirements in this Standard including those requirements with a specifi ed future effectiv
31、e date, unless the applicant specifi cally requests that the product be judged under the current requirements. However, if the applicant elects this option, it should be noted that compliance with all the requirements in this Standard will be required as a condition of continued Listing and Follow-U
32、p Services after the effective date, and understanding of this should be signifi ed in writing. Copyright 2007 Underwriters Laboratories Inc. This Standard consists of pages dated as shown in the following checklist: PageDate 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
33、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . December 4, 2007 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . May 13, 2004 6-8B . . . . . . . . . . . . . . .
34、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . December 4, 2007 9-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . May 13, 200
35、4 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . December 4, 2007 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
36、 . . . . . . . . . . . . . . May 13, 2004 19-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . December 4, 2007 A1-A2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
37、. . . . . . . . . . . . . . . . . . . . . . . . . . . December 4, 2007 SR1-SR2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . December 4, 2007 DECEMBER 4, 2007 UL 1468tr3 Copyright Underwriters Laboratories Inc.
38、Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 12/17/2007 18:30:52 MSTNo reproduction or networking permitted without license from IHS -,-,- UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FRO
39、M UL DECEMBER 4, 2007 UL 1468tr4 No Text on This Page Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 12/17/2007 18:30:52 MSTNo reproduction or networking permitted without license from IHS -,-,- UL COPY
40、RIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 13, 2004 (Title Page Reprinted: December 4, 2007) 1 UL 1468 Standard for Direct Acting Pressure Reducing and Pressure Restricting Valves The fi rst and second editions were titled Direct-Acting Pr
41、essure-Reducing and Pressure-Control Valves for Fire-Protection Service. First Edition January, 1985 Second Edition May, 1991 Third Edition May, 1995 Fourth Edition May 13, 2004 The most recent designation of ANSI/UL 1468 as an American National Standard (ANSI) occurred on December 4, 2007. The ANSI
42、 approval for this standard does not include Appendix A. This ANSI/UL Standard for Safety, which consists of the Fourth Edition with revisions through December 4, 2007, is under continuous maintenance, whereby each revision is ANSI approved upon publication. An effective date included as a note imme
43、diately following certain requirements is one established by Underwriters Laboratories Inc. and is not part of the ANSI standard. Revisions of this Standard will be made by issuing revised or additional pages bearing their date of issue. A UL Standard is current only if it incorporates the most rece
44、ntly adopted revisions, all of which are itemized on the transmittal notice that accompanies the latest set of revised requirements. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line
45、 Collaborative Standards Development System (CSDS) at http:/. COPYRIGHT 1985, 2007 UNDERWRITERS LABORATORIES INC. ANSI/UL 1468-2007 Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 12/17/2007 18:30:52 MST
46、No reproduction or networking permitted without license from IHS -,-,- UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 4, 2007UL 14682 No Text on This Page Copyright Underwriters Laboratories Inc. Provided by IHS under license with
47、ULLicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 12/17/2007 18:30:52 MSTNo reproduction or networking permitted without license from IHS -,-,- UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope
48、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 2 Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 3 Units of Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .