1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1739 Pilot-Operated Pressure-Control Valves for Fire-Protection ServiceUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTE
2、D MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Pilot-Operated Pressure-Control Valves for Fire-Protection Service, UL 1739 Fifth Edition, Dated June 7, 2012 Summary of Topics This revision of UL 1739 has been issued to: Add to
3、 the Glossary of Terms, New 5.8 and 5.9; Add to the Leakage Testing Procedure, New Exception to 20.1.1 and Revised 20.2.1; Revise Operation Testing, Revised 19.1, 19.5, 19.7, 19.8, and Table 19.1, New 19.5.1; and Revise the One-Year Static Leakage Test, Revised 22.1, 22.2, and 22.3. Text that has be
4、en changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. Changes in requirements are marked with 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
5、requirement becomes effective. The new/revised requirements are substantially in accordance with Proposal(s) on this subject dated October 18, 2013. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic,
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8、h 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 electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, dam
9、age, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, gure
10、s, 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that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS noti
11、ce. DECEMBER 13, 2013 UL 1739 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 13, 2013 UL 1739 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JUN
12、E 7, 2012 (Title Page Reprinted: December 13, 2013) 1 UL 1739 Standard for Pilot-Operated Pressure-Control Valves for Fire-Protection Service First Edition January, 1985 Second Edition October, 1988 Third Edition September, 1994 Fourth Edition June, 2004 Fifth Edition June 7, 2012 This ANSI/UL Stand
13、ard for Safety consists of the Fifth Edition including revisions through December 13, 2013. The most recent designation of ANSI/UL 1739 as an American National Standard (ANSI) occurred on December 13, 2013. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page,
14、or effective date information. 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 are copyrighted
15、 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 2013 UNDERWRITERS LABORATORIES INC. ANSI/UL 1739-2013UL CO
16、PYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 13, 2013 UL 1739 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .4 2 Componen
17、ts 4 3 Units of Measurement 4A 4 Undated References .4A 5 Glossary 4A CONSTRUCTION 6 Sizes .4B 7 Rated Inlet Pressure .4B 8 Outlet Pressure Settings 4B 9 Bodies and Bonnets .4B 10 Materials 7 11 Body-Seat Rings .7 12 Valve Mechanisms .7 13 Clearances 8 14 Valve Adjustment 8 PERFORMANCE 15 General .8
18、 16 10-Day Moist Ammonia Air Stress Cracking Test 8 17 Elastomeric Parts (Except Gaskets) Test .9 18 Spring Test 10 19 Operation Test .10 20 Leakage Tests .12 20.1 General .12 20.2 Seat leakage test 12 20.3 Body leakage test .12A 21 Strength of Body Test 12A 22 One-Year Static Leakage Test 12A MANUF
19、ACTURING AND PRODUCTION TESTS 23 General 12B MARKINGS 24 General 12B INSTRUCTIONS 25 Installation and Operating Instructions .15 DECEMBER 13, 2013 UL 1739 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requir
20、ements cover pilot-operated pressure-control valves intended to reduce the water pressure in the supply piping for standpipe systems, or sprinkler systems, or both. 1.2 The valves covered by these requirements are intended for use in: a) Standpipe systems installed in accordance with the Standard fo
21、r Installation of Standpipe and Hose Systems, NFPA 14; or b) Sprinkler systems installed in accordance with the 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 f
22、or the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems, NFPA 25. 2 Components 2.1 Except as indicated in 2.2, a component of a product covered by this standard shall comply with the requirements for that component. 2.2 A component is not required to comply with a specic r
23、equirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 2.3 A component shall be used in accordance with its rating established for the intended condition
24、s 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 be used only under those specic conditions. JUNE
25、 7, 2012 UL 1739 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Units of Measurement 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 4 Undated References 4.1 An
26、y undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 5 Glossary 5.1 For the purpose of these requirements, the following denitions apply. 5.2 MAIN VALVE The part of the valve assembl
27、y that controls the ow of water. 5.3 NPS (NOMINAL PIPE SIZE) A dimensionless designator for pipe sizes dened in standards including ASTM A53, ASTM A135 and ASTM A795 used to replace terms such as Nominal Diameter and Nominal Size . 5.3 added June 7, 2012 5.4 PILOT OPERATED PRESSURE-CONTROL VALVE A v
28、alve intended to reduce the downstream water pressure to a specied value under both owing (residual) and nonowing (static) conditions. 5.5 PILOT VALVE The part of the valve assembly that controls the operation of the main valve. 5.6 RATED INLET PRESSURE The maximum inlet pressure at which the valve
29、is intended to be subjected from the water supply system. 5.7 REFERENCED SETTING(S) A location(s) for setting the valve as referenced in the manufacturers installation and operating instructions and for which performance information is provided. 5.8 RESIDUAL PRESSURE Pressure acting on a point in th
30、e system under owing conditions. 5.8 added December 13, 2013 5.9 STATIC PRESSURE Pressure acting on a point in the system under no (zero) ow conditions. 5.9 added December 13, 2013 DECEMBER 13, 2013 UL 1739 4AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PER
31、MISSION FROM UL CONSTRUCTION 6 Sizes 6.1 As used in these requirements, valve sizes refer to NPS (Nominal Pipe Size) for which the end connections are intended. The diameter of the waterway through the seat of a valve may be reduced to less than the designated NPS. 6.1 revised June 7, 2012 6.2 A pil
32、ot operated pressure control valve shall be constructed for use with 1 NPS. 6.2 revised June 7, 2012 7 Rated Inlet Pressure 7.1 A valve shall be constructed for use at a rated inlet pressure of at least 175 psig (1.21 MPa). 8 Outlet Pressure Settings 8.1 A valve shall be constructed to incorporate a
33、 reference setting or settings to provide a static outlet pressure not exceeding 175 psig (1.21 MPa). Exception: The 175 psig (1.21 MPa) maximum does not apply to a valve intended for deluge (open sprinkler) systems only when the valve is provided with manufacturers instructions indicating that the
34、pressure rating of the components installed downstream of the valve shall not be exceeded. 9 Bodies and Bonnets 9.1 A cast valve body of the globe or angle pattern shall be smooth and free from porosity, scale, lumps, cracks, blisters, sand holes, or other defects that may impair intended operation.
35、 A casting shall not be plugged or lled, but may be impregnated to remove porosity. 9.2 The dimensions of a ange, ange pipe joint, and threaded body opening shall comply with the following requirements, as applicable: a) Standard for Pipe Threads, General Purpose (Inch), ANSI/ASME B1.20.1; b) Standa
36、rd for Dryseal Pipe Threads (Inch) ANSI/ASME B1.20.3; c) Standard for Cast Iron Pipe Flanges and Flanged Fittings, Class 25, 125, 250, and 800 ANSI/ASME B16.1 (Class 125 or higher); and d) Standard for Valves-Flanged, Threaded, and Welding End ANSI/ASME B16.34. 9.3 The bolting of a pressure-holding
37、casting shall be such that the maximum stress on any bolt will not exceed one-fourth the elastic limit of the material. The load on the bolts is to be computed on the basis of the maximum set pressure of the valve. The area of application of pressure is to be calculated as follows: a) If a full face
38、 gasket is used, the area of force application is that area extending out to a line dened by the inner edge of the bolts. DECEMBER 13, 2013 UL 1739 4BUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL b) If an O ring seal or ring gasket is used
39、, the area of force application is that area extending out to the center line of the O ring or gasket. DECEMBER 13, 2013 UL 1739 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 13, 2013 UL 1739 6 No Text on This PageUL COPYRIGHTED
40、MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 10 Materials 10.1 A part that bears against, rotates within, or slides on stationary parts, and that moves during valve operation, shall be either: a) Made of corrosion-resistant material; or b) Fitted with b
41、ushings, inserts, or other parts made of corrosion-resistant material at those points where freedom of motion is required. 10.2 An interior bolt or screw shall be made of bronze or other material having at least equivalent resistance to corrosion. 10.3 An internal spring shall be made of material ha
42、ving corrosion resistance at least equivalent to that of phosphor bronze and shall be resistant to stress corrosion. 10.4 A seat ring shall be made of brass, bronze, or a material having at least equivalent resistance to corrosion and shall be held in place by screw threads, cold swaging, or the equ
43、ivalent. 11 Body-Seat Rings 11.1 A body-seat ring shall have a smooth, machined surface capable of complying with the Seat Leakage Test specied in 20.2. 11.2 A seat ring of an iron-bodied valve shall be made of a material having corrosion resistance equivalent to brass or bronze and shall be held in
44、 place by screw threads, cold swaging, or the equivalent. 12 Valve Mechanisms 12.1 An internal working part that is removed during intended maintenance shall be removable without damaging the valve. The removal shall require the use of ordinary tools only, such as pipe wrenches, at-blade or cross-po
45、int screwdrivers, pliers, and the like. 12.2 A part that is disassembled in eld servicing shall be of a construction that will permit its accurate reassembly. 12.3 A part within the valve shall be secured to resist separation during intended use. 12.4 If an orice with a diameter less than 3/16 inch
46、(4.8 mm) is used in the trim or operation of a valve, a screen or strainer with corrosion resistance equivalent to brass shall be provided. The total area of the openings in the screen or strainer shall be not less than 20 times the cross-sectional area of the opening that the screen or strainer is
47、intended to protect. The largest dimension of the screen or strainer openings shall not exceed 1/32 inch (0.8 mm) less than the diameter of the protected orice. The strainer shall be constructed such that the screen is capable of being cleaned without removing the strainer from the pilot piping. JUN
48、E 7, 2012 UL 1739 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 12.5 The pilot trim line used in a pressure control valve shall not incorporate a manual shutoff valve that could affect the proper operation of the valve unless the shutoff
49、valve has provisions to be locked in the open position. 13 Clearances 13.1 Clearances shall be provided between working parts and between working and stationary parts so that corrosion or deposits of foreign matter within an assembly will not result in impaired operation of the valve. 13.2 The clearance between a valve disc or a part attached thereto and the inside walls of an iron body casting shall not be less than 1/2 inch (12.7 mm) for every position of the disc e
