1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-23571-0 SANS 1808-35:2010Edition 1.2SOUTH AFRICAN NATIONAL STANDARD Water supply and distribution system components Part 35: Electronicall
4、y operated taps and valves Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 1808-35:2010 Edition 1.2 Table of changes Change No. Date Scope Amdt 1 2004 Amended to update the list of part
5、s in the foreword, to remove reference to the certification mark, to update referenced standards, to redefine “acceptable“ and to delete reference to an agreement between the manufacturer and purchaser regarding the method of operation and environmental protection of the unit. Amdt 2 2010 Amended to
6、 update the reference to the national regulatory authority and to move it to the foreword, and to update the list of parts in the foreword. Foreword This South African standard was approved by National Committee SABS SC 138G, Water and sanitation Equipment and systems Plumbing components, in accorda
7、nce with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was published in April 2010. This document supersedes SANS 1808-35:2004 (edition 1.1). A vertical line in the margin shows where the text has been technically modified by amendment
8、No. 2. A reference is made in 4.4 to the “relevant national regulatory authority”. In South Africa this means a) the compulsory specification for electrical and electronic appliances (as published by Government Notice No. 89 (Government Gazette No. 31844) of 6 February 2009); b) the radio regulation
9、s of the Ministry of Telecommunications; and c) the Association of Municipal Electricity Undertakings (Southern Africa). Amdt 2 SANS 1808 consists of the following parts, under the general title Water supply and distribution system components: Part 2: Metallic compression type pipe couplings. Part 5
10、: Flexible connectors. Part 8: Tap converters (copper alloy bodies). Amdt 1 Part 9: Metering taps and valves (metallic bodies). Part 10: Copper alloy check valves (spring-loaded). Part 13: Diaphragm valves. Amdt 1 Part 15: Mechanical backflow-prevention devices. Amdt 1 Part 16: Drinking fountain tap
11、s. Part 18: PVC-U gate valves. SANS 1808-35:2010 Edition 1.2 1 Foreword (concluded) Part 24: Gas-operated water heaters. Part 30: Laboratory water taps. Part 31: Automatic control valves. Part 32: Float valves (equilibrium type). Part 35: Electronically operated taps and valves. Part 37: Single-cont
12、rol mixer taps (plastics). Part 44: Pipe saddles. Part 45: Pipe repair clamps. Part 53: Drain cocks for hot-water storage containers. Part 58: In-line strainers. Part 66: Demand type water taps. Part 85: Oriented polyvinyl chloride (PVC-O) pressure pipes for underground use. Amdt 1; amdt 2 Annex A f
13、orms an integral part of this document. Annexes B and C are for information only. SANS 1808-35:2010 Edition 1.2 2 Contents Page Foreword 1 Scope 3 2 Normative references 3 3 Definitions . 3 4 Requirements 4 5 Inspection and methods of test. 6 5.1 Inspection 6 5.2 Performance test. 6 5.3 Test for dez
14、incification resistance. 7 6 Marking . 7 Annexes A Note to purchasers 8 B Quality verification of electronically operated taps and valves . 8 C Bibliography 9 SANS 1808-35:2010 Edition 1.2 3 Water supply and distribution system components Part 35: Electronically operated taps and valves 1 Scope This
15、 part of SANS 1808 specifies requirements for electronically operated taps and valves of size up to 32 mm, for use in hot-water and cold-water systems at a working pressure of up to 600 kPa. 2 Normative references The following standards contain provisions which, through reference in this text, cons
16、titute provisions of this part of SANS 1808. All standards are subject to revision and, since any reference to a standard is deemed to be a reference to the latest edition of that standard, parties to agreements based on this part of SANS 1808 are encouraged to take steps to ensure the use of the mo
17、st recent editions of the standards indicated below. Information on currently valid national and international standards can be obtained from the SABS Standards Division. SANS 135/ISO 1456, Metallic coatings Electrodeposited coatings of nickel plus chromium and of copper plus nickel plus chromium. S
18、ANS 226, Water taps (metallic bodies). SANS 1067-1, Copper-based fittings for copper tubes Part 1: Compression fittings. SANS 1067-2, Copper-based fittings for copper tubes Part 2: Capillary solder fittings. SANS 1109-1/ISO 7-1, Pipe threads where pressure-tight joints are made on the threads Part 1
19、: Dimensions, tolerances and designation. SANS 6509/ISO 6509, Corrosion of metals and alloys Determination of dezincification resistance of brass. 3 Definitions For the purposes of this part of SANS 1808, the following definitions apply: 3.1 acceptable acceptable to the authorities administering thi
20、s standard Amdt 1 SANS 1808-35:2010 Edition 1.2 4 3.2 agreed agreed upon between the manufacturer and the purchaser 3.3 unit a tap or valve, as appropriate 4 Requirements 4.1 Materials 4.1.1 Plastics materials The type and quality of the material of a plastics component part shall be such as to ensu
21、re a) the acceptable performance and durability of the component under normal operating conditions, and b) that, when the component is subjected to a temperature of 150 C 5 C in an air-circulating oven for 60 min 5 min, there is no sign of blistering of the material or weld-line splitting of the com
22、ponent. Any damage around the injection point shall not have penetrated to a depth of more than 50 % of the thickness of the material at that point. 4.1.2 Metallic materials Metallic materials that are intended to come into contact with water during operation shall be a) a copper alloy that, when te
23、sted in accordance with 5.3, shows no individual penetration reading that exceeds 250 m, two samples being taken from each cast component (one from the thinnest part and the other from the thickest part) and one sample from every other component, or b) a stainless steel of an acceptable grade. Amdt
24、1 4.2 Performance requirements 4.2.1 Working pressure rating The design pressure rating of the unit shall be such that the unit can tolerate a working pressure of up to 600 kPa, and when the unit is tested in accordance with 5.2.2.1, there shall be no leakage at the seat. 4.2.2 Method of operation T
25、he unit shall operate electronically and the time and mode of operation of each cycle shall be acceptable to the type of unit and the duty it has to perform (see 4.5). Amdt 1 4.2.3 Environmental protection The unit shall be protected against its operating environment in an acceptable manner. Amdt 14
26、.2.4 Safety operation In the event of a power failure, the unit shall close automatically to ensure that the water flow is shut off completely. SANS 1808-35:2010 Edition 1.2 5 4.3 End connections 4.3.1 Inlet connection (of a tap or a valve) 4.3.1.1 Size The size of the unit shall be 10 mm, or 15 mm,
27、 or 20 mm, or 25 mm, or 32 mm as agreed upon (see annex A). 4.3.1.2 Type of connection The inlet connection of the unit shall be as agreed upon (see annex A) and shall comprise a) a parallel thread, in accordance with SANS 1109-1, or b) a compression type fitting that complies with SANS 1067-1, or c
28、) a capillary type fitting that complies with SANS 1067-2. 4.3.2 Outlet connection (of a tap) The outlet connection of a tap shall be furnished with an acceptable aeration device that complies with the appropriate requirements of SANS 226. 4.4 Legal requirements The unit shall comply with the approp
29、riate and relevant national regulatory authority (see foreword). Amdt 2 4.5 Flow rate When determined in accordance with 5.2.2.5, the flow rate shall be as follows: a) for basin taps: 6 L/min 1 L/min; b) for bowl urinals: 2,0 L 0,2 L per flush; c) for toilets: 9,0 L 0,2 L per flush; and d) for showe
30、rs: 10 L/min 1 L/min. 4.6 Inadvertent activation The design of the mechanism of the unit shall be such that inadvertent operation or activation of the unit cannot take place. 4.7 Springs Springs shall be of stainless steel. The ends shall be a) ground flat and parallel to each other to within 5, or
31、b) so finished with end caps that they can be mounted in an acceptable way. SANS 1808-35:2010 Edition 1.2 6 4.8 Finish The external surface of the unit shall be coated or uncoated, as agreed upon (see annex A). When the surface is to be coated, the coating shall be a) a nickel and chrome coating tha
32、t complies with the requirements for service condition 2 of SANS 135; or b) a powder coating that complies with the requirements for type 4 coatings of SANS 135; or c) any other agreed coating that has corrosion-resistant and wear-resistant properties at least equal to those of the coating specified
33、 in (b) above. 4.9 Durability When a unit is tested in accordance with 5.2.2.6, no component part shall break or become so distorted as to render it ineffective for its normal operation, and there shall be no leakage through the body or through any mechanical joint in the body. 5 Inspection and meth
34、ods of test 5.1 Inspection Inspect each electronically operated tap and valve for compliance with those requirements of this part of SANS 1808 for which tests to assess compliance are not given in 5.2 and 5.3 (inclusive). 5.2 Performance test 5.2.1 Apparatus 5.2.1.1 Water supply, the pressure of whi
35、ch can be adjusted up to 2 000 kPa. 5.2.1.2 Calibrated pressure gauge. 5.2.1.3 Measuring tank. 5.2.1.4 Cycling device, that will allow the unit to open and close as in normal practice, at a rate of about 2 cycles per minute, one cycle consisting of one opening and one closing action. 5.2.2 Procedure
36、 5.2.2.1 Mount the unit in the cycling device and connect the water supply to the inlet of the unit, with the pressure gauge situated at the inlet. 5.2.2.2 Place the unit in the closed position and increase the water supply pressure to 600 kPa. 5.2.2.3 Start the cycling device and allow it to carry
37、out 100 000 cycles. 5.2.2.4 Stop the cycling device in the closed position, and check the seats for compliance with 4.2.1. 5.2.2.5 Open the unit, measure the rate of water flow and check for compliance with the appropriate requirement of 4.5. SANS 1808-35:2010 Edition 1.2 7 5.2.2.6 Close the unit, i
38、ncrease the water pressure to 2 000 kPa, allow it to remain at this pressure for 5 min and then check for compliance with 4.9. 5.3 Test for dezincification resistance Subject copper alloy components that are intended to be in contact with water to the test given in SANS 6509 and check for compliance
39、 with 4.1.2(a). 6 Marking The following information shall appear in legible and indelible marking in a visible position on the outside of each unit: a) the manufacturers name, trade name or trade mark; and b) when relevant, the letters “DR“ (that indicate that copper alloy components are dezincifica
40、tion resistant). SANS 1808-35:2010 Edition 1.2 8 Annex A (normative) Note to purchasers The following requirements shall be agreed upon between the supplier and the purchaser: a) the size of the unit (see 4.3.1.1); b) the type of inlet connection (see 4.3.1.2); c) whether units are to be coated or u
41、ncoated (see 4.8); and d) when relevant, the type of coating (see 4.8). Amdt 1 Annex B (informative) Quality verification of electronically operated taps and valves B.1 When a purchaser requires ongoing verification of the quality of electronically operated taps and valves, it is suggested that, ins
42、tead of concentrating solely on evaluation of the final product, he also direct his attention to the manufacturers quality system. In this connection it should be noted that SANS 9001 covers the provision of an integrated quality system. B.2 If no information about the implementation of quality cont
43、rol or testing during manufacture is available to help in assessing the quality of a lot, and a purchaser wishes to establish, by inspection and testing of samples of the final product, whether a lot of the electronically operated taps and valves complies with this part of SANS 1808, an acceptable s
44、ampling plan should be agreed upon between the supplier and the purchaser. Amdt 1 It should be noted that a) such a sampling plan applies to fully manufactured electronically operated taps and valves only, and b) a lot that, in terms of the sampling plan, is deemed to comply with this part of SANS 1
45、808 could contain defective electronically operated taps and valves to an extent proportional to that permitted by the relevant acceptance number given in the agreed sampling plan. SANS 1808-35:2010 Edition 1.2 9 Annex C (informative) Bibliography SANS 9001/ISO 9001, Quality management systems Requi
46、rements. Amdt 1 SABS This page has been left blank intentionally SABS Standards Division The objective of the SABS Standards Division is to develop, promote and maintain South African National Standards. This objective is incorporated in the Standards Act, 2008 (Act No. 8 of 2008). Amendments and Re
47、visions South African National Standards are updated by amendment or revision. Users of South African National Standards should ensure that they possess the latest amendments or editions. The SABS continuously strives to improve the quality of its products and services and would therefore be gratefu
48、l if anyone finding an inaccuracy or ambiguity while using this standard would inform the secretary of the technical committee responsible, the identity of which can be found in the foreword. Tel: +27 (0) 12 428 6666 Fax: +27 (0) 12 428 6928 The SABS offers an individual notification service, which
49、ensures that subscribers automatically receive notification regarding amendments and revisions to South African National Standards. Tel: +27 (0) 12 428 6883 Fax: +27 (0) 12 428 6928 E-mail: salessabs.co.za Buying Standards Contact the Sales Office for South African and international standards, which are available in both electronic and hardcopy format. Tel: +27 (0) 12 428 6883 Fax: +27 (0) 12 428 6928 E-mail: salessabs.co.za South African National Standards are also available online from the SABS website http:/www.sabs.co.za Information on Standards
