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1、 Neither this standard, nor any portion thereof, may be reproduced without the written consent of the American Society of Sanitary Engineering. No product may besaid to beASSE approved unlessthe manufacturer has applied tothe ASSE has had his product tested according to the applicable ASSE Standards
2、, 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 ASSES International Office. Organizations wishing to adopt or list any ASSE Standard should print the ASSE Standard number on the cov
3、er page first and in equal or larger type to that of the adopting or listing organization. American Society of Sanitary Engineering Westlake, Ohio Copyright O 2004 All rights reserved. Water Temperature Limiting Bevices ASSE #?O70 - 2004 -,-,- This fureword shall not be cunsidered a part of the stan
4、dard; however, it is uffered to provide background infurmatiun. ASSE standards are develuped in the interest uf consumer safety. This standard is fur devices which limit the water temperature to a fixture or fixtures such as sinks, lavatories or bathtubs to reduce the risk of scalding. The device sh
5、all be either the final temperature regulation ur have water further tempered downstream uf the device with the addition uf culd water. The application uf these devices are nut intended to pruvide protection against thermal shuck. Products in cumpliance with this standard are not intended fur wall m
6、ounted shuwers. This standard cuvers devices that can supply single or multiple puint-of-use fixtures, address- ing temperature regulatiun and maximum temperature limiting of the hut water supplying the fixture(s). Recugnitiun is made of the time volunteered by members of this working group and uf t
7、he suppurt uf the manufacturers whu also participated in the meetings fur this standard. The standard dues not imply ASSES endursement uf a product which confurms with these req u i re men 6%. Compliance with this standard does nut imply acceptance by any cude budy. It is recommended that these devi
8、ces be installed cunsistent with lucal codes. This standard was prumulgated in accurdance with procedures developed by ASSE and appruved by the American National Standards Institute. Water Teinperature Limiting Devices ASSE $1070 - 2004 -,-,- Riehard J. ProspaI Product Standards Committee Chairman P
9、rospai Corsulting Semices. nc. Brunswick. Ohio Rand Hs e k o d Rand Engine ering Neiwburyporf, Massachusefts Stafe of Wisconsin Depadinent of Commerce Madison, Wisconsin Gunnar o, CoIIins Co/i!?s Backiiow Specialistss, lnc. Palatine, liiinois Jud CoIIIns Oklahoma Stafe Health Deparfment Oklahoma Cit
10、y, Oklahoma ASSE Standards Coordinator Wesf/ake. Ohio a, i a r d ers General interest Buffalo Grove, Iilinsis even Haazzard ASSE Staff Engineer Westiake. Ohio DaIe Hwa SGS United States Testing Company Tuka. kjahoma ichaeI e in te mational Association of Plumbing and Mechanical Oficials Walnut, Cali
11、fornia a I e n n e Lehr? P-E. Lehr Associates New Yorky New York United Association of Plumbers and Pipefitters Washington. B. C. Perry eikIe, Jr- Perry w. Meikie Consuiting ngineer Antioch, California ai r RawaI p i nd iwa Ia Kohler Company Kohler. Wisconsin ne In %nternationa/ Code Council, h. Cou
12、nty Ciub Mis, Iilinsis Jack Vendre Precision Pkmbing Producfs, In. Podiand, Oregon David Viola Piumbing Man ufactwers institute Schaumberg. /!inois Joseph c, au, P-E ASSE Sfa# Engineer Westiake, Ohio Water Temperature Limiting Devices ASSE #?O70 - 2004 -,-,- Wand Engineering Newbuvporf. Massachusett
13、s Missisauga, Ontario, Canada Ichae! r w n Cash Acme i Reiiance Woridwide Corp. Cuiiman. AIabama obert Castle Honeyeii Water ControIs Wa!wickr Rhode isiand ichard Cota, Jr* Leonard Vaive Company Cranston, Rhode island Richard rucsa Ternpress Limited Missisaugra, Untario, Canada A. Richard Emmeason G
14、enera! lnterest Buffado Grove, !/inois ert v e e I h Laider Manufacturing Company lndianapoiis, hdiana Steve Ferrueci Lawler Manufacturmg Company indianapofis, indiana Susan a a d a Product Listing Services, inc. Litchfieid, Ohio James Gabin Symmons industries. In. Braintree, Massachusetts James Gra
15、ves Powers Process controis Des Plaines. illinois illiam Hall Leonard Valve Company Cranston, Rhode fsiand S e n Hazzard ASSE StafPEngineer Westiake, Ohio Conbraco industries, inc. Mattheim. North Cardina Tim lbe Symmons lndustries, !m. Braintree. Massachusetts Ken onha SA international Cieveland, O
16、hio Trevor Perera CSA Mernational Cleveiandy Ohio awas p I nd iwasa Kohler Company Kohler, Wisconsin Sally Remedios Delfa Faucet Company fndianapoiis, indiana Heath Sharp Cash Acme I Reliance Woridwide Carp. Cu/iman, Aiabama Water Temperature Limiting Devices V ASSE $1070 - 2004 -,-,- Joseph c. Zaff
17、uto, P=E. ASSE Staff Engineer Wesfiake. Ohio vi Water Temperature Limiting Bevices ASSE #?O70 - 2004 -,-,- section l II.I.I.I.I.II.I.I.I.I.II.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.,. 1 1 . O General 1 1 .1 Application . 1 1.2 scope . 1 1 .3 Reference Standards . 1 . S
18、ecfian Il II.I.I.I.I.II.I.I.I.I.II.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I.I.II.I.I.I. 2 2.4 Samples SubmiGed . 2 2.2 Samples Tested 2.3 Drawings . 2 2.4 Rejection 2.0 Test Specimens section III 3 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 Performance Requirements and Compliance Testing.
19、 Figure 1 . 3 Life Cycle Test Regulation and Temperature Variation Test . 3 High Temperature . . Working Pressure Test . . . 4 Flov; Rate and Pressure Drop Test . . . 5 Cold Water Supply Failure Test . Cross Flow Test . 6 Hydrostatic Pressure Test . seetion IV 7 4.0 Detailed Requirements . . 7 4.1 M
20、aterial In Contact with Water 3 4.2 Markings . . 7 4.3 Installation and Maintenance Instructions . 7 4.4 Access r b r l ity . 7 . . . Wafer Temperature Limiting Devices ASSE $1070 - 2004 Water Temperature Limiting Bevices ASSE #?O70 - 2004 -,-,- Water Temperature Limiting Devices (herein referred to
21、 as the “device“) shall wntrol and limit the water temperature to fittings for fixtures such as sinks, lavatories or bathtubs and are intended to reduce the risk of scalding. 1 -2.1 $rescriptian These devices are intended to supply tempered water to plumbing fixture fittings, or be integral with plu
22、mbing fixture fittings supplying tempered water. The device shall be equipped with an adjustable and lockable means to limit the setting of the device towards the hot position, Where thedevice is integraltothefixture fitting, itshall complywiththe requirements ofASMEA1 12.18.1. 1.2.2 Flaw Wange The
23、manufacturer shall designate the minimum and maximum flow rate and pressure drop of devices other than those designed into fixture fittings. The flow rates for devices designed into fixture fittings shall be in accordance with ASME A1 12.1 8.1 1.2.3 Working Pressure The device shall be designed ta f
24、unction at a maximum working pressure of not less than -325.0 psi (861 .8 kPa). 1.2.4 Temperature Range The device shall be designed with an adjustable outlet temperature that shall include the range 105.0 “F to 110.0 “F (40X “C to 43.3 “C). The device shall operate with inlet Cold water temperature
25、s 39.0 “F to 80.0 “F (3.3 “C to 26.7 “C) and with inlet hot water temperatures 120.0 “F to 180.0 “F (48.9 “C to 82.2 “Cl. 1.2.5 Cross Flow Thedeviceshall includea meansofpreventing cross flowwhen tested in accardancewith Section 3.7. Referenced industry standards shall be the latest edition. Water T
26、einperature Limiting Devices ASSE $1070 - 2004 I -,-,- Three (3) devices of each size and model shall be submitted by the manufacturer. The testing agency shall select one (i) of each size and model for the fui! test. Tests chai! be performed in the order listed. Assembly and installation drawings,
27、and any other data necessary to determine compliance with this standard shall accompany the devices submitted to the testing agency. Failure of one (I) device shall result in a rejection of that model and size. 2 Water Temperature Limiting Bevices ASSE #?O70 - 2004 3.i .i Purpose The purpose of this
28、 test is to determine if the materials withstand the maximum temperatures specified in section 1 2.4. 3.i 2 Procedure Install the device as shown in Figure 1. a) Establishand maintainforthedurationofthetee;tanequal pressureof45.0 psiE% F m H - - Sh tit-off Shut-off Valve #1 Valve $2 Thermocouple The
29、rmocouple T I T2 Throttle Valves Footnotes: tubing. Piping to thermocoupie T3 shali be the s a w as the control vaive outiet conneciion. 2. Bimensron “E“ from the outlet of the control valve to the thermocouple chal! not exceed I 8 inches (457 mm). Piping to this point shall he the same size as the
30、control valve ouilet connection. 3. For devices that are designed rnto fixture fittings, Dimension “E“ from the outlet of the conti-ol valves to trie thermocouple sriall not exceed 1 inch (25 mmj. Water Teinperature Limiting Devices ASSE #I070 - 2004 3 -,-,- 3.9 -3 criteria Indication of change in t
31、he physical characteristics ofthe material which prevents full compliance with any requirement of this standard shall result in a rejection ofthe device. 3.2.9 Purpose The purpose ofthis test is to determine if the device can withstand a pressure of 125.0 psi (861 .9 kPaj without damage or impairmen
32、t of its performance capabilities. 3.2.2 Procedure Subject the device to a water pressure of 125.0 psi i 1 .O psi (864.9 kPa k 6.9 kPaj for five (5j minutes with the outlet blocked. ln addition. for devices with seating members apply a water pressure of 125.0 psi k 1 .O psi (861.9 kPa k 6.9 kPa) to
33、the inlets ofthe device for five (5) minutes with the seating member (excluding service stops) Closed and the outlet open to atmosphere. 3.23 criteria Any indication of leakage, damage or distarfion shall result in a rejection ofthe device. 3.3.9 Purpose The purposeofthis test is to determine ifther
34、e is any deterioration in performance upon mmpletion of the cycles of operation noted below. 3.3.2 Procedure The device shall be cycle tested as follows: Cold water at ambient temperatures shall be supplied to the cold water inlet and hot water at 140.0 “F i 5.0 “F (60.0 “C k 2.8 Cj shall be supplie
35、d to the hot water inlet. During this test, maintain the cold and hot water inlet pressures at45.0 psi i 1 .O psi (31 0.2 kPa k 6 9 kPal. The discharge flow rate shall be set at the manufacturers minimum remmmended flow. With the hot and Cold water supply valves open, and the device set to discharge
36、 water at 105.0 “F 0 5.0 “F (40.6 C i 2.8 “C), flow for a minimum of six (6) semnds; reduce the hot water temperature to ambienttemperature for a minimum of six (6) seconds, Increase the hotwater temperature to 440.0 “Fi 5.0 F (60.0 *C i 2.8 Cj. This constitutes one cycle. The device shall be cycled
37、 at a rate of 3 - 5 cycles per minute for a total of 100,000 cycles, 3.3.3 criteria Failure to meet the remaining sections of this standard shall result in a rejection of the device. 3.49 Purpose The purpose ofthis test is to verify thatthe flow rate and the associated pressure drop is consistent wi
38、th the manufacturers engineering specifications, 3.42 Procedure install the device as shown in Figure 1. Establish the following test parameters: a. Maintaining equal pressures at the hot and cold water inlets, establish a pressure drop equal to the midpoint of the manufacturers published data. b. S
39、et the outlet temperature to the midpoint ofthe hot and cold water supplies, provided that it is within the range ofthe devices capabilities. c. Measure and record the outlet flow rate. 4 Water Temperature Limiting Bevices ASSE #?O70 - 2004 -,-,- 3.4.3 Criteria An outlet flow rate of less than 90.0
40、of the manufacturers published flow rate shall result in a rejection of the device. 3.5.1 Purpose The purpose of this test is to determine if the outlet temperature is maintained within a set temperature and to a maximum of 120.0 “F (48.9 “C). 3.5.2 Procedure Install the device as shown in Figure 1.
41、 Establish the following test Darameters An equal pressure of 45.0 psj 2 1 .O psi (310.3 kPa 6.9 aia) on.both the cold and hot water in lets, A hot water supply temperature of 140.0 “F t 5.0 “F (60.0 “C t 2.8 “CI, A cold water supply temperature not to exceed 70.0 “F (21 .i “Cj, A flow equal to the
42、manufacturers stated minimum flow (+10 percent i -O)% Adjust the limit stop in accordance with the manufacturers recommendations. An outlet temperature of 105.0 “F t 1 .O “F (40.6 “C t 0.6 “CI. Flow for one (1) minute then proceed with test. Continuously record the outlet temperatures. Note: 3,5.2.1
43、 Pa shall result in the rejection of the device. 3.) to 5.0 psi (34.5 kPal water. Maintain for one (1) minute, Examine for leakage at the hot port(sj. b. Pressurize the hot water port(sl to 5.0 psi (34.5 kPa) water, Maintan for one (1) minute. Examine for leakage at the cold port(s). 3-73 criteria A
44、ny appearance of leakage n excess of 0.01 GPM (50 cc per minute) shall result in a rejection of the device. 3.8,3 Purpose The purpose ofthis test is to determine if any leakage occurs at a hydrostatic pressure of 500.0 psi (3447.5 kPa), 3.82 Procedure With the outletjs) blocked and the device fully
45、open, pressurize the device with water at ambient temperature to 500.0 psi (3447.5 kPaj for one (4) mnute, 3.83 criteria Any leakage through the device shall result in a rejection of the device. 6 Water Temperature Limiting Bevices ASSE #?O70 - 2004 -,-,- Solder and fluxes containing lead in excesso
46、fO.296 shall not be used in contact with potable water. Metal alloys in contact with potable water shall not exceed 8% lead. 4.3.4 nently marked on it where it is visible during field installation and servicing. Each device shall have the name of manufacturer or trademark, and model perma- 4.1 .Bo T
47、he device shall have markings to indicate the hot and cold water inlet ports and that indicate the direction or means to change the outlet temperature setting, Markings shall be clear, permanent, and visible after installation. Temperatur $b#ntr#I Setting Identificatisn Manufacturers instructions for installation, adjustment, setting the limit stop, and maintenance of thedeviceshall be packaged with each device, Manufacturers literatureshall includefhw ratevs, pressure drop data; and shall state the minimum flow rate of the device. . The internal p