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 STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FRO
2、M ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Direct Acting Pressure Reducing and Pressure Restricting Valves, UL 1468 Fifth Edition, Dated May 9, 2016 Summary of Topics This new edition of UL 1468 includes t
3、he following changes in requirements: Addition of end connection and outlet pressure/ow requirements, revised title in Section 7, revised 7.1, 7.2, and Table 10.1, new 7.4. The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated March 4, 2016. All righ
4、ts reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either express
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6、t of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the elec
7、tronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Stand
8、ard on the purchasers computer system. MAY 9, 2016 UL 1468 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 9, 2016 UL 1468 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT
9、 PERMISSION FROM UL May 9, 2016 1 UL 1468 Standard for Direct Acting Pressure Reducing and Pressure Restricting Valves The rst and second editions were titled Direct-Acting Pressure-Reducing and Pressure-Control Valves for Fire-Protection Service. First Edition January, 1985 Second Edition May, 1991
10、 Third Edition May, 1995 Fourth Edition May, 2004 Fifth Edition May 9, 2016 This ANSI/UL Standard for Safety consists of the Fifth Edition. The most recent designation of ANSI/UL 1468 as an American National Standard (ANSI) occurred on May 9, 2016. ANSI approval for a standard does not include the C
11、over Page, Transmittal Pages, or Title Page. 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 Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety a
12、re copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2016 UNDERWRITERS LABORATORIES INC. ANSI/UL
13、1468-2016UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 9, 2016 UL 1468 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2
14、Components 5 3 Units of Measurements 6 4 Undated References 6 5 Glossary .6 CONSTRUCTION 6 General 7 7 End Connections 7 8 Rated Inlet Pressure 8 9 Outlet Pressure Settings Valves Intended for Sprinkler Systems 8 10 Outlet Pressure Settings Valves Intended for Standpipe System Outlets 8 11 Bodies an
15、d Bonnets 8 12 Body-Seat Rings .9 13 Valve Stems 9 14 Stuffing Boxes and Seals .9 15 Handwheels 10 16 Seat Rings, Discs, and Holders .10 17 Valve Mechanisms 10 18 Valve Adjustments 11 PERFORMANCE 19 General 11 20 10-Day Moist Ammonia Air Stress Cracking Test .11 21 Elastomeric Parts (Except Gaskets)
16、 Test 12 22 Operating Torque Test 13 22.1 General .13 22.2 Test procedure .13 23 Spring Test 14 24 Operation Test .14 24.1 General .14 24.2 Pressure restricting valves .14 24.3 Pressure reducing valves 15 25 Leakage Tests .15 25.1 Seat leakage test 15 25.2 Body leakage test 16 25.3 Repacking test .1
17、6 26 Strength of Body Test .16 27 Mechanical Strength Test Internal and External Valve Parts 17 28 One-Year Static Leakage Test .18 29 Electrically Operated Valve Monitor Switches 18 MANUFACTURING AND PRODUCTION TESTS 30 General 19 MAY 9, 2016 UL 1468 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURT
18、HER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARKING 31 General 19 INSTRUCTIONS 32 Installation and Operating Instructions .20 Appendix A Standards for ComponentsA1 MAY 9, 2016 UL 1468 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION
19、FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover direct-acting pressure-reducing and pressure restricting valves intended to reduce the water pressure in standpipe systems or in the supply piping for sprinkler systems. These requirements also cover pressure reducing valves that can be used
20、as an indicating control valve in a sprinkler system. 1.2 The valves covered by these requirements are intended for use in: a) Standpipe systems installed in accordance with the Standard for Installation of Standpipe and Hose Systems, NFPA 14; or b) Sprinkler systems installed in accordance with the
21、 Standard for Installation of Sprinkler Systems, NFPA 13. 1.3 The valves covered by these requirements are intended to be inspected, tested and maintained in accordance with the Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems, NFPA 25. 1.4 Direct-acting p
22、ressure-reducing and pressure restricting valves covered by these requirements include the following patterns and sizes: a) Angle Patterns for Standpipe Use Inlet and outlet openings having nominal diameters of 1, 1-1/2, 2-1/2, or 3 NPS. b) Angle Patterns for Sprinkler Systems Sizes greater than 1 N
23、PS. c) Straightway Pattern for Standpipe Use Inlet and outlet openings having nominal diameters of 1, 1-1/2, 2-1/2, or 3 NPS. d) Straightway Patterns for Sprinkler Systems Sizes greater than 1 NPS. 2 Components 2.1 Except as indicated in 2.2, a component of a product covered by this standard shall c
24、omply with the requirements for that component. See Appendix A for a list of standards covering components generally used in the products covered by this standard. 2.2 A component is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the ap
25、plication of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. MAY 9, 2016 UL 1468 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.3 A component shall be used in accordance with
26、its rating established for the intended conditions of use. 2.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall
27、 be used only under those specic conditions. 3 Units of Measurements 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 4 Undated References 4.1 Any undated reference to a code or standard appearing in the requirements of this
28、 standard shall be interpreted as referring to the latest edition of that code or standard. 5 Glossary 5.1 For the purpose of this standard, the following denitions apply. 5.2 NPS (NOMINAL PIPE SIZE) A dimensionless designator for pipe sizes dened in standards including Standard Specication for Pipe
29、, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless, ASTM A53/A53M, Standard Specication for Electric-Resistance-Welded Steel Pipe, ASTM A135/A135M, and Standard Specication for Black and Hot-Dipped Zinc-Coated (Galvanized) Welded and Seamless Steel Pipe for Fire Protection Use, ASTM A79
30、5/A795M used to replace terms such as Nominal Diameter and Nominal Size . 5.3 PRESSURE REDUCING VALVE A valve intended to reduce the downstream water pressure under both owing (residual) and non-owing (static) conditions. 5.4 PRESSURE RESTRICTING VALVE A valve or device intended to reduce downstream
31、 water pressure under owing (residual) conditions only and for use on standpipe outlets only. 5.5 REFERENCED SETTING(S) A location(s) for setting the valve as referenced in the manufacturers installation and operating instructions and for which performance characteristics are provided. 5.6 RESIDUAL
32、PRESSURE For standpipe and sprinkler systems, pressure acting on a point in the system under owing conditions. 5.7 STATIC PRESSURE For standpipe and sprinkler systems, pressure acting on a point in the system under no ow conditions. MAY 9, 2016 UL 1468 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FUR
33、THER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONSTRUCTION 6 General 6.1 A valve intended for use as an indicating control valve in sprinkler systems shall be provided with means to positively indicate when the valve is in the open and closed position. The indicator shall be visible f
34、rom two positions, 180 degrees apart at a distance of 50 feet (15.24 m). Exception: The indicator is required to only be visible from one location if the indicator can be adjusted to a point of maximum visibility when the valve is installed. 7 End Connections 7.1 An inlet for a valve shall be: a) Of
35、 female pipe threads complying with the requirements in the Standard for Pipe Threads, General Purpose Inch, ANSI/ASME B1.20.1; or b) Of pipe threads complying with national pipe thread standards that apply where the valve is intended to be installed; or c) Grooved end complying with the Standard fo
36、r Grooved and Shouldered Joints, ANSI/AWWA C606. 7.2 The outlet of a valve intended for standpipe use shall be threaded in accordance with the Standard for Fire Hose Connections, NFPA 1963, unless specically constructed to t existing equipment. The outlet shall be provided with at least four full th
37、reads. Outlets of a valve intended for stand pipe use shall be permitted to use threads complying with a specication where the valve is intended to be installed. 7.3 The outer end of threads other than taper pipe threads see the Standard for Pipe Threads, General Purpose (Inch), ANSI/ASME B20.1 shal
38、l be terminated by the Higbee Cut to facilitate coupling and to reduce the likelihood of cross threading. 7.4 Outlets shall be permitted to have a grooved end complying with the Standard for Grooved and Shouldered Joints, ANSI/AWWA C606. MAY 9, 2016 UL 1468 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FO
39、R FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 8 Rated Inlet Pressure 8.1 A valve shall be constructed for use at a rated inlet pressure of 175 psig (1210 kPa) or greater. 8.2 A pressure restricting valve shall not have a rated inlet pressure exceeding 175 psig (1210 kPa). 9 Outle
40、t Pressure Settings Valves Intended for Sprinkler Systems 9.1 A valve intended for use in sprinkler systems shall be constructed to incorporate a referenced setting or settings to provide a static outlet pressure not exceeding 175 psig (1210 kPa). Exception: A valve intended for deluge (open sprinkl
41、er) systems only is permitted to be constructed to incorporate a referenced setting or settings to provide a static outlet pressure greater than 175 psig (448 kPa) provided the manufacturers instructions indicate that the pressure rating of the components installed downstream of the valve are not to
42、 be exceeded. 9.2 A valve intended for use in sprinkler systems shall have a minimum residual pressure of 50 psig (345 kPa) for the ow ranges specied in the installation instructions. 10 Outlet Pressure Settings Valves Intended for Standpipe System Outlets 10.1 A valve intended for standpipe system
43、outlets shall be constructed to incorporate a referenced setting or settings to provide static outlet pressures not exceeding 100 psig (691 kPa) for 1-1/2 NPS outlets and 175 psig (1210 kPa) for 2-1/2 NPS outlets and residual outlet pressures at the ows specied in Table 10.1. Table 10.1 Valve residu
44、al inlet and outlet pressures Residual inlet pressure, psig Outlet size, NPS Residual outlet pressure, psig ow rate 100 1-1/2 65 and 100 100 gpm 175 2-1/2 100 and 175 250 gpm 11 Bodies and Bonnets 11.1 For a valve intended for standpipe use, a pressure retaining body and bonnet shall be made entirel
45、y of brass or bronze, or other material having at least equivalent resistance to corrosion. 11.2 A valve intended for use in sprinkler systems shall be made of cast iron or other materials having at least equivalent strength and resistance to corrosion. 11.3 A casting shall be smooth and free from s
46、cale, lumps, cracks, blisters, sand holes, or other defects that impairs intended operation. A casting shall not be plugged or lled, but may be impregnated to remove porosity. MAY 9, 2016 UL 1468 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM
47、 UL 12 Body-Seat Rings 12.1 A body-seat ring shall have a smooth, machined surface capable of complying with the Seat Leakage Test specied in 25.1. 12.2 A seat ring of an iron-bodied valve shall be made of brass or bronze and shall be held in place by screw threads, cold swaging, or the equivalent.
48、13 Valve Stems 13.1 Stem threads shall be Acme, modied Acme, half V, or square. 13.2 A stem shall be made of brass or bronze. 14 Stuffing Boxes and Seals 14.1 A valve shall be provided with a means to prevent leakage at the valve stem. The bearing surface provided in a stuffing box gland or seal ret
49、ainer for the stem shall be of brass or bronze or material having at least equivalent resistance to corrosion. 14.2 A stuffing box shall embody a gland or follower with a packing nut. There shall be no threads within the stuffing box. 14.3 The depth of a stuffing box shall not be less than the diameter of the valve stem where the stem passes through the box. 14.4 The width of a stuffing box shall be sufficient to permit the entrance and use of p
