1、STD.BSI BS EN 1074-3-ENGL 2000 m Lb24bbS 0859954 359 m BRITISH STANDARD Valves for water supply - Fitness for purpose requirements and appropriate verification tests - Part 3: Check valves The European Standard EN 10743:2 has the status of a British Standard ICs 23.060.50; 91.140.60 NO COPYING WITHO
2、UT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 1074-3:2000 . National foreword This British Standard YS the official English language version of EN 107432000. The UK participation in its preparation w-as entnisted by Technical Cornuttee PSW, Valves, to Subcommittee PSW/7, Valves for th
3、e water industry, which has the responsibility to: - aid enqiirers to understand the text; - present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed - monitor related international and European developments and pr
4、omulgate them in the UK A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document niay be found in the RSI Standards Catalogue under
5、the section entitied “International Standards Correspondence Index”, or by using the Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct appli
6、cation. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 9 and a back cover. The BSI copyright notice displayed in this document indcates when the
7、 document was last issued. This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes Amendments issued since publication Comients -LI into effect on 15 July 2000 -I- O BSI 07-2000 ISBN O
8、 580 35957 3 -iI: EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10744 April 2000 ICs 23.060.50 English version Valves for water supply - Fitness for purpose requirements and appropriate verification tests - Part 3: Check valves Robinetterie pour lalimentation en eau - Prescriptions daptitude
9、lemploi et vrifications sy rapportant - Partie 3: Clapets de non retour Armaturen fr die Wasserversorgung - Anforderungen an die Gebrauchstauglichkeit und deren Prfung -Teil 3: Rckfluverhinderer This European Standard was approved by CEN on 26 November 1999. CEN members are bound to comply with the
10、CENICENELEC Internal Regulations which stipulate the conditions for giving this Europsan Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning ach national standards may be obtained on application to the Central Secretariat or t
11、o any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by traislation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as he official versions
12、. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITEE FOR STANDARDIZATION COMIT EUROPEN DE NO
13、RMALISATION EUROPISCHES KOMITEE FR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels O 2000 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1074-3:2000 E Page 2 EN 1074-3:2000 Contents Foreword 3 Introduction . 3 1 S
14、cope 4 2 Normative references . - 4 3 Definitions . 4 4 Design requirements . 5 5 Performance requirements . 5 5.1 Mechanical strength 5 5.2 Leak-tightness 6 5.3 Hydraulic characteristics 7 5.4 Resistance to disinfection products 7 5.5 Endurance . .- 7 6 Conformity assessment 7 6.1 General 7 6.2 Typ
15、e tests . 7 6.3 Control of production process and quality system . 7 8 Packaging . 7 Annex A (normative) Test method for the endurance of check valves (see 5.5) . 9 7 Marking . 7 O BSI 07-2000 Page 3 EN 1074-312000 Foreword This European Standard has been prepared by Technical Committee CENTTC 69, I
16、ndustrial valves, the Secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2000, and conflicting national standards shall be withdrawn at the latest by Oc
17、tober 2000. It consists of six parts: Part 1 : General requirements Part 2: Isolating valves Part 3: Check valves Part 4: Air valves Part 5: Control valves Part 6: Hydrants. Part 1, in conjunction with the subsequent parts, lays down the general requirements and test procedures to be carried out in
18、production and during the assessment of conformity of these valves (type tests). The detailed requirements, which depend on the types of valves, are defined in parts 2 to 6 of this standard. Annex A of this European standard is normative. According to the CENKENELEC Internal Regulations, the nationa
19、l standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Q BS
20、I 07-2000 Page 4 EN 1074-312000 Introduction In respect of potential adverse effects on the quality of water intended for human consumption caused by the product covered by this standard: 1) This standard provides no information as to whether the product may be used without restriction in any of the
21、 Member States of the EU or EFTA. 2) It should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. 1 Scope This European Standard defines the minimum fitness for purpo
22、se requirements for check valves to be used in, or connected to, water supply pipe systems, above or below ground (see EN 805), carrying water intended for human consumption. This standard specifies the design requirements, the performance requirements, and the conformity assessment method for check
23、 valves, whatever their type and materials. This standard applies in priority to any other product or test standard: the requirements from other standards apply only when this standard refers to them. This standard deals with the requirements applicable to check valves up to DN 2 O00 and PFA 6 bar t
24、o PFA 25 bar. It does not apply to anti-pollution check valves which are covered by other standards. 2 Normative references This European Standard incorporates, by dated or undated references, provisions from other publications. These normative references are cited at the appropriate places in the t
25、ext and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to appl
26、ies. EN 736-1, Valves - Terminology - Part I Definition of the types of valves. EN 1074-1, Valves for water supply - Fitness for purpose requirements and appropriate verification tests - Pari 1 : General requirements. EN 1267, Valves - Test of flow resistance using water as test fluid, EN 805, Water
27、 supply - Requirements for systems and components outside buildings. 3 Definitions For the purpose of this standard, the definitions of EN 1074-1 apply together with the following definitions: 3.1 automatically closes to prevent fluid flow in the reverse direction (EN 736-1). check valve: Valve whic
28、h automatically opens by fluid flow in a defined direction and which O BSI 07-2000 STD-BSI BS EN 107q-3-ENGL 2000 D Lb24bb9 08599bD b52 m Page 5 EN 1074-3:2000 4 Design requirements Check valves shall be designed in accordance with the requirements given in clause 4 of EN 1074-1. Check valves can be
29、 equipped with a device to assist closure or balance the weight of the obturator; however, such valves are not considered to have a mechanically operated obturator. The manufacturer shall indicate in the relevant technical documentation the orientations in which the check valves fulfil the requireme
30、nts of this standard. 5 Performance requirements 5.1 Mechanical strength 5.1 .I Resistance to internal pressure of the shell and of all pressure containing components Requirement and test shall be in accordance with 5.1 .I of EN 1074-1. 5.1.2 Resistance of the obturator to differential pressure Requ
31、irement and test shall be in accordance with 5.1.2 of EN 1074-1. The test shall be performed with the pressure applied to the downstream side of the obturator. After the test, the obturator shall not be jammed nor wedged. After completing the test, the operating torque shall not exceed the initial o
32、perating torque by more than 1 O %. 5.1.3 Resistance of valves to bending Bending resistance is an optional requirement for check valves; if bending resistance is claimed by the manufacturer, the requirement and test shall be in accordance with 5.1.3 of EN 1074-1, for sizes DN 50 up to and including
33、 DN 500. The test shall be performed with the pressure applied to the downstream side of the obturator. The bending moments M to be applied during the test shall be as given in table 1 as a function of DN, or shall be given by the manufacturers technical documentation. O BSI 07-2000 STD-BSI BS EN L0
34、7q-3-ENGL ZOO0 Lb29bb 08557bL 577 Page 6 EN 1074-3:2000 5.2 Leak-tightness Table 1 - Bending moments 50 65 80 100 125 150 1050 1 400 1 500 2 200 3 200 4 800 200 250 300 350 400 450 500 7 200 11 O00 15 O00 19 O00 24 O00 28 O00 33 O00 5.2.1 Leak-tightness of the shell and all pressure containing compo
35、nents 5.2.1 .I Requirement and test shall be in accordance with 5.2.1.1 of EN 1074-1. Leak-tightness to internal pressure 5.2.1.2 Leak-tightness to external pressure Requirement and test shall be in accordance with 5.2.1.2 of EN 1074-1. 5.2.2 Seat tightness 5.2.2.1 Seat tightness at high differentia
36、l pressure Requirement and test shall be in accordance with 5.2.2.1 of EN 1074-1. For a type test, the test duration shall be not less than 10 min. The test shall be performed with the pressure applied to the downstream side of the obturator. 5.2.2.2 Seat tightness at low differential pressure Requi
37、rement and test shall be in accordarice with 5.2.2.2 of EN 1074-1, with the test duration given in 5.2.2.1. The test shall be performed with the pressure applied to the downstream side of the obturator. O BSI 07-2000 STD.BS1 BS EN 107V-3-ENGL 2000 m 1b2Libb O599b2 Li25 m Page 7 EN 1074-312000 5.3 Hy
38、draulic characteristics Requirement shall be in accordance with 5.3 of EN 1074-1 ; the characteristic given by the manufacturer shall be the head loss as a function of flow. When measured with a test installation in accordance with clause 4 of EN 1267, the head loss shall be not more than 1,l times
39、the value indicated by the manufacturer. Testing is not required for check valves greater than DN 300. 5.4 Resistance to disinfection products Requirement and test shall be in accordance with 5.4 of EN 1074-1. 5.5 Endurance Check valves shall keep their functional capacity after a significant number
40、 of operations (openinglclosing cycles). When, in order to verify this requirement, a check valve has been subjected to a test in accordance with annex A, comprising 2 500 opening/closing cycles, it shall still pass the leak-tightness tests in accordance with 5.2.1 and 5.2.2 and no breakage of any p
41、art shall be detected by visual inspection after dismantling the valve. Testing is not required for check valves greater than DN 300. 6 Conformity assessment 6.1 General Requirement shall be in accordance with 6.1 of EN 1074-1. 6.2 Type tests Requirement shall be in accordance with 6.2 of EN 1074-1;
42、 the type tests to be performed shall be those given in table 2. They shall take place with the valve in the horizontal position, or in the position indicated by the manufacturer depending on the possibilities of use of the check valve. 6.3 Control of production process and quality system Requiremen
43、t shall be in accordance with 6.3 of EN 1074-1; the production control tests in table 2 are informative. 7 Marking Requirement shall be in accordance with clause 7 of EN 1074-1. In addition, the direction of flow shall be marked. 8 Packaging Requirement shall be in accordance with clause 8 of EN 107
44、4-1. Q BSI 07-2000 Page 8 EN 1074-3:2000 Sub- clause a 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 - 4.10 4.11 5.1.1 5.1.2 5.1.3 5.2.1.1 5.2.1.2 5.2.2.1 5.2.2.2 5.3 5.4 5.5 - a The sub-clauses and requirements shown above, are those given in EN 1074-1 - Table 2 - Requirements and tests - Requirement a Mater
45、ials DN Pressures Tempera t u res Design of the shell and obturator End types and interchangeability Operating direction Maximum water velocity All materials, including lubricants, in contact with water intended for human consumption Internal corrosion and ageing resistance External corrosion and ag
46、eing resistance Resistance to internal pressure of the shell and of all pressure containing components Resistance of the obturator to differential pressure Resistance of valves to bending Leak-tightness to internal pressure Leak-tightness to external pressure Seat tightness at high differential pres
47、sure Seat tightness at low differential pressure Hydraulic or airflow characteristics Resistance to disinfection products Endurance Type tests see drawings and part lists see drawings see technical documentation see Materials see test report or calculation report see drawings and marking see drawing
48、s see clause 4 see test reports in accordance with national regulations see drawings, part lists and technical documentation see drawings, part lists and technical documentation see 5.1.1 see 5.1.2 see 5.1.3 see 5.2.1.1 see 5.2.1.2 see 5.2.2.1 see 5.2.2.2 see 5.3 see 5.4 see 5.5 Production tests (in
49、formative) visual inspection of coatings visual inspection of coatings see 5.1.1 see 5.2.1.1 see 5.2.2.1 O BSI 07-2000 STD*BSI BS EN 1074-3-ENGL 2000 Lb24bb9 08599bli 2TA Page 9 EN 1074-3:2000 Annex A (normative) Test method for the endurance of check valves (see 5.5) A.1 General The test shall be performed with water at ambient temperature, on a check valve in its delivery state. The test assembly shall be able to establish in sequence a water flow situation through the valve with a minimum velocity of 1 m/s and a no flow situation with a downs
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