1、Water Pressure Reducing Valves for Domestic Water Distribution Systems 1ASSE #1003 Revised: 2009Performance Requirements forWater PressureReducing Valves for Domestic WaterDistribution SystemsAmerican Society of Sanitary EngineeringASSE Standard #1003-2009ASSE Board Approved: September 28, 2009 ANSI
2、 Approved: January 19, 2010An American National StandardWater Pressure Reducing Valves for Domestic Water Distribution Systems iASSE #1003 Revised: 2009General InformationNeither this Standard, nor any portion thereof, may be reproduced without the written consent of the American Society of Sanitary
3、 Engineering.Although this Standard may be used as a benchmark for in-house evaluation, no product may be said to be ASSE approved unless the manufacturer has applied to ASSE, has had the product tested by an official ASSE recognized independent laboratory, according to the ap-plicable ASSE Standard
4、, and when the product has passed the test, displays the ASSE Seal on the product. Instructions for receiving the authorization to display the Seal are available from the ASSE International Office.It is recommended that all devices designed for plumbing systems, especially those which pertain to pub
5、lic health and safety, should be installed consistent with local codes by qualified and trained professionals.American Society of Sanitary EngineeringWestlake, OhioCopyright 2009, 2001, 1993, 1982All rights reserved.ii Water Pressure Reducing Valves for Domestic Water Distribution SystemsASSE #1003
6、Revised: 2009Water Pressure Reducing Valves for Domestic Water Distribution Systems iiiASSE #1003 Revised: 2009ForewordThis foreword shall not be considered a part of the standard, however, it is offered to provide background information.ASSE Standards are developed in the interest of consumer safet
7、y.The American Society of Sanitary Engineering is dedicated to the preservation of public health and safety through its guiding principle “Prevention Rather Than Cure”.The ASSEs Standards Program systematically evaluates new technologies through a formal request, and addresses the development and pr
8、omulgation of performance standards designed to safeguard public health and safety.Standards for the performance of components of systems of plumbing are considered by the American Society of Sanitary Engineering to be of great value in the development of improved plumbing systems for the increased
9、protection of public health and safety.To accomplish this, ASSE, through its Product Standards Committee, encourages manufac-turers to develop performance standards and testing procedures for their products. These standards have the consensus of the manufacturers and others who have pertinent intere
10、sts in plumbing systems, and are acceptable to this Society.This standard for water pressure reducing valves is one for which the need was expressed. It was developed by a sub-committee of the ASSE Standards Committee using as a base the standard of the City of Los Angeles, which was originally crea
11、ted by a group which included the major manufacturers of this class of product.Testing procedures and test equipment diagrams have been added to this basic standard to enable uniform testing by testing agencies with adequate facilities and qualified personnel.At the October 1964 Annual Meeting of th
12、e Society, this standard was accepted as an ASSE Standard and assigned the identifying number 1003.Performance standards for systems and devices must be reviewed periodically and upgraded as research, field conditions and experience suggest. The policy of the American Society of Sanitary Engineering
13、 is to review each standard on a five year cycle for revisions or reaffirma-tion. Between such reviews, the Product Standards Committee works with interested groups in obtaining information for study and evaluation for acceptance in upgrading a standard.Although many of the material specifications a
14、re detailed within Section IV of this Standards, iv Water Pressure Reducing Valves for Domestic Water Distribution SystemsASSE #1003 Revised: 2009it is the responsibility of the manufacturer to comply with the requirements of the Safe Drink-ing Water Act, United States Public Law 93-523.The working
15、group which developed this standard revision, was set up within the framework of the Product Standards Committee of the American Society of Sanitary Engineering.Recognition is made of the time volunteered by members of this working group and of the support of the manufacturers who also participated
16、in the meetings for this standard.This standard does not imply ASSEs endorsement of a product which conforms to these requirements.Compliance with this standard does not imply acceptance by any code body.It is recommended that these devices be installed consistent with local codes by qualified and t
17、rained professionals.This standard was promulgated in accordance with procedures developed by the American National Standards Institute (ANSI).This edition of the standard was approved by the ASSE Board of Directors on September 28, 2009, as an ASSE standard.Water Pressure Reducing Valves for Domest
18、ic Water Distribution Systems vASSE #1003 Revised: 2009Edward J. LyczkoProduct Standards Committee ChairmanCleveland ClinicCleveland, OhioRand H. AckroydRand Technical Consulting, LLCNewburyport, MassachusettsWilliam Briggs, Jr.MGJ Associates New York, New YorkJudson W. CollinsJULYCO ProfessionalsMa
19、nnford, OklahomaA. Richard EmmersonGeneral InterestBuffalo Grove, IllinoisRon GeorgeRon George Design close all downstream valves except valve #5 to the 1/16 inch (1.6 mm) orifice. Adjust the device to its maximum and minimum reduced pressure.8 Water Pressure Reducing Valves for Domestic Water Distr
20、ibution SystemsASSE #1003 Revised: 20093.6.3 CriteriaLack of a 25.0 psi (172.4 kPa) adjustment range shall result in a rejection of the device.3.7 Capacity Test 3.7.1 PurposeThe purpose of this test is to determine if the device has a minimum capacity as shown in Table 2 when maintaining a reduced p
21、ressure (fall-off) of 17.0 psi (117.2 kPa) less than its no-flow set (lock-up) pressure and with the supply pressure maintained at 50.0 psi (344.7 kPa) higher than the reduced flowing pressure.3.7.2 ProcedureInstall the device in the system per Figure 3. Close all downstream valves except valve #5 i
22、n the line to the 1/16 inch (1.6 mm) orifice. Open valve #3 and regulate the supply pressure to a suitable pressure indicated by gauge #3 which shall be maintained throughout the test. Adjust the device to maintain a set pressure of 33.0 psi (227.5 kPa) less than supply pressure. Close valve #5 and
23、slowly open the throttling valve #4 until the reduced pressure gauge #4 is 17.0 psi (117.2 kPa) less than the set pressure and record the rate of flow through the device.3.7.3 CriteriaFailure to flow the required minimum capacity as indicated in Table 2 at 17.0 psi (117.2 kPa) below the no-flow set
24、pressure shall result in a rejection of the device. 3.8 By-Pass Relief Valve Opening Pressure Differential Test (Only required for devices with by-pass relief valve)3.8.1 PurposeAn integral or built-in by-pass relief valve shall be capable of opening to permit a reverse flow of water through the dev
25、ice to prevent a build-up of system pressure by thermal expansion with an increase of reduced pressure not to exceed 10.0 psi (68.9) above the prevailing initial pres-sure at the inlet of the device.3.8.2 ProcedureWith the device installed per Figure 3 and with valves #4, #5 and #6 closed, open the
26、supply valve #3 and regulate the supply pressure at 100.0 psi (689.5 kPa). Open throttling valve #4, purge the system of air and then close valve #4. Record the exact pressure registered on gauge #3. Open valves #6 and #7, then use valve #7 to adjust the pressure shown on gauge #5 to read 5.0 psi (3
27、4.5 kPa) less than the pressure shown on gauge #3. Slowly raise the pressure in the downstream line until the pressure registered by gauge #3 first starts to rise. At this point, observe the pressure registered on gauge #4. The difference between the pressures on gauge #3 and gauge #4 is what is nee
28、ded to start opening the by-pass check relief valve. This pres-sure difference shall not exceed 10.0 psi (68.9 kPa).3.8.3 CriteriaFailure of the by-pass relief valve to open at 10.0 psi (68.9 kPa) pressure differential shall result in a rejection of the device.Water Pressure Reducing Valves for Dome
29、stic Water Distribution Systems 9ASSE #1003 Revised: 2009Section IV4.0 Detailed Requirements4.1 Materials4.1.1 Material in Contact with WaterSolder and fluxes containing lead in excess of 0.2% shall not be used in contact with potable water. Metal alloys in contact with potable water shall not excee
30、d 8% lead.4.1.2 Non-ferrous Cast PartsNon-ferrous cast parts shall have a corrosion resistance at least equal to ASTM B584 Alloy UNS #C84400.4.1.3 Ferrous Cast PartsParts shall conform to ASTM A126 Class B for gray iron or ASTM A536 Grade 65-45-12 for ductile iron. Parts in contact with the water fl
31、owing through the device shall be protected against corrosion by hot dip galvanizing, ASTM A153 Class A or B, or by other proven methods.4.1.4 Internal Non-Cast PartsInternal non-cast parts shall be of a material having a corrosion resistance at least equal to a non-ferrous alloy of not less than fi
32、fty-eight percent (58%) copper.4.1.5 Stainless Steel or Nickel AlloysStainless steel shall be ANSI type 300 series or equal in corrosion resistance. Monel metal or other nickel alloys with corrosion resistance equal to type 300 series stainless steel are acceptable.4.1.6 Seat RingThe seat assembly i
33、n the device body shall be replaceable. It shall be made of series 300 stain-less steel or equal corrosion resistance material.4.1.7 Springs - ASTM GradeSprings not in contact with the water flowing through the device shall be of a recognized ASTM grade.4.1.8 Springs - Corrosion ResistanceSprings in
34、 contact with the water flowing through the device shall have a corrosion resistance at least equal to stainless steel, series 300. 4.1.9 Screen MaterialThe strainer shall be of corrosion resistant material equal to monel metal or stainless steel, type 300 series.4.1.10 Bolts, Nuts and ScrewsBolts,
35、nuts and screws used in the device shall be of an approved corrosion resistant material or have an approved corrosion resistant coating. Threads shall be in accordance with American Standard Unified Screw Thread ANSI/ASME B1.1 and/or metric ISO threads.4.1.11 Pipe Threads(a) Taper pipe threads, exce
36、pt dryseal, shall be in compliance with ANSI/ASME B1.20.1.(b) Dryseal threads shall be in compliance with ANSI/ASME B1.20.3.10 Water Pressure Reducing Valves for Domestic Water Distribution SystemsASSE #1003 Revised: 20094.2 Marking Each device shall have the following information permanently marked
37、 on it where it will be vis-ible after the device has been installed:(a) Name of manufacturer or trademark.(b) Type and model number of the device.(c) Maximum working pressure.(d) Maximum water temperature for which the device is designed.(e) The direction of water flow through the device.(f) Nomina
38、l device size.4.3 Installation and Maintenance Instructions4.3.1 Complete instructions for installation and adjustment of the device shall be packaged with it. Drawings or schematic sketches which would be useful to the installer shall be part of these instructions. 4.3.1.1 Installation instructions
39、 shall state that the device shall be installed in an accessible location.4.3.1.2 Installation instructions shall state that for devices without an integral strainer, it is recommended that a suitable strainer be installed upstream of the device.4.3.2 Complete detailed maintenance instructions shall
40、 be furnished.Water Pressure Reducing Valves for Domestic Water Distribution Systems 11ASSE #1003 Revised: 2009Section V5.0 DefinitionsDefinitions not shown are found in the latest edition of the Plumbing Dictionary, published by ASSE.Integrated TypeOne which is a complete and independent device whi
41、ch is assembled with, but is separate and independent of, any working part of the device.Integral StrainerA strainer within the body or within an extension of the body of the device.No-Flow Set (Lock-Up) PressurePressure setting at device outlet with no water flowing through the device.12 Water Pres
42、sure Reducing Valves for Domestic Water Distribution SystemsASSE #1003 Revised: 2009American Society of Sanitary Engineeringfor plumbing and sanitary research901 canterbury road, suite a Westlake, ohio 44145-1480 usatel: (440) 835-3040 faX: (440) 835-3488e-mail: general.infoasse-plumbing.org Web: www.asse-plumbing.orgPreventionRatherThanCure
