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 Service STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION
2、FROM ULUL COPYRIGHTED 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 Sixth Edition, Dated April 28, 2017 Summary of Topics This new edition of ANSI/UL 1
3、739 has been issued to include the requirement for Outlet Pressure Setting. The requirements are substantially in accordance with Proposal(s) on this subject dated March 10, 2017. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any
4、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 expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose.
5、 In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been ad
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7、y loss, expense, liability, damage, 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. APRIL 28, 2017 UL 1739 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURT
8、HER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 28, 2017 UL 1739 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 28, 2017 1 UL 1739 Standard for Pilot-Operated Pressure-Control Valves for Fire-
9、Protection Service First Edition January, 1985 Second Edition October, 1988 Third Edition September, 1994 Fourth Edition June, 2004 Fifth Edition June, 2012 Sixth Edition April 28, 2017 This ANSI/UL Standard for Safety consists of the Sixth Edition. The most recent designation of ANSI/UL 1739 as an
10、American National Standard (ANSI) occurred on April 28, 2017. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, and 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 Propo
11、sal Request in ULs On-Line Collaborative Standards Development System (CSDS) at https:/. ULs Standards for Safety are 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 S
12、tandards shall remain the sole and exclusive property of UL. COPYRIGHT 2017 UNDERWRITERS LABORATORIES INC. ANSI/UL 1739-2017UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 28, 2017 UL 1739 2 No Text on This PageUL COPYRIGHTED MATERIAL
13、NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .4 2 Components4 3 Units of Measurement .5 4 Undated References 5 5 Glossary .5 CONSTRUCTION 6 Sizes 6 7 Rated Inlet Pressure 6 8 Outlet Pressure Settings .6 9 Bodies and Bonnets .6 10 Ma
14、terials7 11 Body-Seat Rings.7 12 Valve Mechanisms .7 13 Clearances8 14 Valve Adjustment 8 PERFORMANCE 15 General.8 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
15、leakage test 12 20.3 Body leakage test 12 21 Strength of Body Test .13 22 One-Year Static Leakage Test .13 MANUFACTURING AND PRODUCTION TESTS 23 General13 MARKINGS 24 General14 INSTRUCTIONS 25 Installation and Operating Instructions .15 APRIL 28, 2017 UL 1739 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED
16、FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements 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 thes
17、e 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 Standard for Installation of Sprinkler Systems, NFPA 13. 1.3 The valves covered by
18、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. 2 Components 2.1 Except as indicated in 2.2, a component of a product covered by this standard shall c
19、omply with the requirements for that component. 2.2 A component is not required to comply with a specic requirement 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 sta
20、ndard. 2.3 A component shall be used in accordance with 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 cert
21、ain temperatures not exceeding specied limits, and shall be used only under those specic conditions. APRIL 28, 2017 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
22、 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 standard shall be interpreted as referring to the latest edition of that code or standard. 5 Glossary 5.1 For the
23、 purpose of these requirements, the following denitions apply. 5.2 MAIN VALVE The part of the valve assembly 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
24、as Nominal Diameter and Nominal Size. 5.4 PILOT OPERATED PRESSURE-CONTROL VALVE A valve 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
25、main valve. 5.6 RATED INLET PRESSURE The maximum inlet pressure at which the valve 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 performa
26、nce information is provided. 5.8 RESIDUAL PRESSURE Pressure acting on a point in the system under owing conditions. 5.9 STATIC PRESSURE Pressure acting on a point in the system under no (zero) ow conditions. APRIL 28, 2017 UL 1739 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR D
27、ISTRIBUTION WITHOUT PERMISSION 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. 6.2 A pilot
28、 operated pressure control valve shall be constructed for use with 1 NPS. 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 reference setting or setti
29、ngs 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 applications that require higher outlet pressures provided that manufacturers instructions indicate that the pressure rating of the components
30、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. A casting shall not be plugged or
31、 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) Standard for Dryseal Pipe Threads (Inch)
32、 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 casting shall be such that the max
33、imum 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 gasket is used, the area of force
34、 application is that area extending out to a line dened by the inner edge of the bolts. b) If an O ring seal or ring gasket is used, the area of force application is that area extending out to the center line of the O ring or gasket. APRIL 28, 2017 UL 1739 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR
35、 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 bushings, inserts, or other
36、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 having corrosion resistance a
37、t 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 equivalent. 11 Body-Seat Rings
38、 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 place by screw threads, co
39、ld 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-point screwdrivers, pliers, a
40、nd 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 (4.8 mm) is used in the tri
41、m 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 intended to protect. The la
42、rgest 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. APRIL 28, 2017 UL 1739 7UL COP
43、YRIGHTED 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 valve has provisions to b
44、e 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
45、 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 except fully open. This clearance shall not be less than 1/4 inch (6.4 mm) for valves having bodies of bronze or equivalently corrosion-resistant material
46、. 14 Valve Adjustment 14.1 A valve shall be provided with a means such as a fastening nut to secure the intended setting. PERFORMANCE 15 General 15.1 Representative samples of each size valve shall be subjected to the tests described in Sections 16 22. Additional samples of parts constructed of nonm
47、etallic materials, such as rubber seal rings, are to be used for the Elastomeric Parts (Except Gaskets) Test, Section 17. 16 10-Day Moist Ammonia Air Stress Cracking Test 16.1 After being subjected to the conditions described in 16.2 16.4, a brass part containing more than 15 percent zinc when exami
48、ned using 25X magnication shall: a) Show no evidence of cracking; or b) Comply with the Leakage Test, Section 20, and the Strength of Body Test, Section 21, if there is evidence of cracking. 16.2 Each test sample is to be subjected to the physical stresses normally imposed on or within a part as the
49、 result of assembly with other components. Such stresses are to be applied to the sample prior to and maintained during the test. Samples with threads, intended to be used for installing the product in the eld, are to have the threads engaged and tightened to the torque specied in Table 16.1. Pipe sealing tape or pipe compound are not to be used on the threads. APRIL 28, 2017 UL 1739 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT
