1、STD-BSI BS EN L2530-ENGL 5000 W Lb24bb9 OBb5L57 OYT BRITISH STANDARD Industrial valves - Method for sizing the operating element The European Standard EN 125702000 has the status of a British Standard ICs 23.oGo.01 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITED BY COPYRIGHT LAW BS EN 12570:200
2、0 - STD-BSI BS EN 32570-ENGL 2000 hb24bb9 OBb5158 T8b = didon of the Engineering Amd. No. Date Sedor Committee, was published under the authority of the standards Committee and comes into effect on 15 August 2000 BS EN 126702000 Comments National foreword This British Standard is the English languag
3、e version of EN 1257Q2000. The UK participation in its preparation was entrusted by Technid Commiee PSW, Valves, to Subcommittee PSEp7I1, Valves - Basic standards, which has the responsibility to: - aid enquirers to understand the text; - present to the responsible European committee any enquiries o
4、n the interpretation, or proposals for change, and keep the UK interests informed; - monitor related intrnatiod and European developments and promulgate them in the UK A list of organizatons represented on this subcommittee can be obtained on request to its secretary. Cross-references The British St
5、andards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by ushg the “Find” facility of the BSI Standards Electronic Catalogue. A British Stand
6、ard does not purport to include ail the necessary provisions of a contract Users of British standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, a
7、n inside front cover, the EN tite page, pages 2 to 7 and a back cover. The BSI copynght notice displayed in this document indicates when the document WaSlaStiSSUed. Q BSI 082000 I l ISBN O 580 34914 4 - STD-BSI BS EN L2570-ENGL 2000 1624669 0865159 912 EUROPEAN STANDARD EN 12570 NORME EUROPENNE EURO
8、PISCHE NORM May 2000 ICs 23.060.01 English version Industrial valves - Method for sizing the operating element Robinetterie industrielle - Mthode de dimensionnement de Iorgane de manoeuvre Industriearmaturen - Verfahren fr die Auslegung des Bettigungselementes This European Standard was approved by
9、CEN on 9 April 2000. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this Europeen Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning sich national standards
10、may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three offcial versions (English, French, German). A version in any other language made by trmslation under the responsibility of a CEN member into its own language and notified to the Cen
11、tral Secretariat has the same status as tie offcial versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Noway, Portugal, Spain, Sweden, Switzerland and United Kingdom
12、. EUROPEAN COMMITTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMITE EUROPEN DE NORMALISATION Central Secretariat: rue de Stassart, 36 8-1050 Brussels 8 2000 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12570:2000 E ST
13、DoBSI BS EN 12570-ENGL 2000 Lb24669 OBbSLbO b34 m Page 2 EN 12570:2000 Contents Page Foreword . 3 Introduction . 4 1 Scope 5 2 Normative References . 5 3 Terms and definitions 5 4 Symbols 5 5 Requirements . 6 5.1 Manual force . . 6 5.2 Sizing of the operating element 6 8 BSI 08-2000 STD*BSI BS EN L2
14、570-ENGL 2000 lb24bb7 OBb51ibL 570 D Page 3 EN 12570:2000 Foreword This European Standard has been prepared by Technical committee CENTTC 69, Industrial valves, the Secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication o
15、f an identical text or by endorsement, at the latest by August 2000, and conflicting national standards shall be withdrawn at the latest by August 2000. According to the CENICENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Euro
16、pean Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. This European Standard has been prepared under a mandate given to CEN by the European Com
17、mission and the European Free Trade Association. This European Standard is considered to be a supporting standard to those application and product standards which in themselves support an essential safety requirement of a New Approach Directive and which make reference to this European Standard. 8 B
18、SI 08-2000 STD-BSI BS EN 12570-ENGL 2000 m 1b24bb9 0865162 Li07 W Page 4 EN 12570:2000 Introduction The manual forces which a person can apply to an operating element (handwheel or lever) are basically independent of the type of the valve and depend on the person operating the valve, his position to
19、 the operating element, etc. This European Standard specifies the manual forces and the calculation method to be used in sizing the operating element for all industrial valve types. Q BSI 08-2000 STD-BSI BS EN L2570-ENGL 2000 Lb2Lihb9 0865Lb3 343 = Page 5 EN 12570:2000 I Scope This European Standard
20、 specifies the requirements for establishing the minimum size of the operating element supplied with an industrial valve having regard for the force applied by one person to operate the valve under specified working conditions. This standard applies to manual operating elements of sizes from 100 mm
21、to 1 O00 mm: - directly mounted on valves; - mounted on valve reduction gearboxes; - used for manual operation of power actuated valves. This standard does not apply to: - impactor handwheels; - T-keys; - chainwheels. 2 Normative references This European Standard incorporates by dated or undated ref
22、erence, provisions from other publications. These normative references are cited at the appropriate places in the text 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 incorpo
23、rate in it by amendments or revision. For undated references, the latest edition of the publication referred to applies (including amendments). EN 736-1, Valves - Terminology - Part I: Definition of types of valves EN 736-2, Valves - Terminology - Part 2: Definition of components of valves. EN 736-3
24、, Valves - Terminology - Part 3: Definition of terms. 3 Terms and definitions For the purposes of this European Standard the terms and definitions given in EN 736-1, EN 736-2 and EN 736-3 apply. 4 Symbols The symbols used in this standard are as follows: D L T is the diameter of the handwheel, expre
25、ssed in millimetres (mm); is the length of the lever or radius of the crank circle, expressed in millimetres (mm); is the torque, under specified conditions, to operate the valve, expressed in Newton metres (Nm); T, is the maximum torque, under specified conditions, to seat or unseat the obturator o
26、r to overcome temporary intermediate dynamic conditions, expressed in Newton metres (Nm); O BSI 08-2000 STDaBSI ES EN L2570-ENGL 2000 Lb24bbS OBb5Lb4 28T 100 125 160 200 250 250 300 300 350 400 N Page 6 EN 12570:2000 315 400 F is the operating manual force to size the manual operating element, expre
27、ssed in Newtons (N); N F, is the maximum manual force to size the manual operating element, expressed in Newtons (N). 500 600 600 700 800 800 5 Requirements 5.1 Manual force The value of the operating manual force F and the maximum manual force F, used to calculate the size of the operating element
28、according to 5.2 shall be as given in Table 1. Table 1 - Manual force I I D and L mm 400 1400 400 400 1 O00 1 O00 1 O00 1 O00 For intermediate values of D and L the applicable values of F and F, shall be calculated by linear interpolation of the tabulated values. The force F is the assumed manual fo
29、rce which one person is capable of applying to the operating element under the following conditions: - operator in standing position; - operating element at approximately waist level; - no space restrictions; - firm footing; - operating time no longer than 5 min. The force F, is the assumed manual f
30、orce which one person is capable of applying to the operating element under the same conditions as force F except that the time period is short. If other conditions apply the values of F and F, to be used shall be subject to an agreement between the manufacturer and the customer. 5.2 Sizing of the o
31、perating element The size of the operating element (see Figures 1 and 2) shall be calculated to comply with the following conditions: a) handwheel 2 000xT and 2 OOOxT, . I F Fs D shall be equal to or greater than O BSI 08-2000 - STD*BSI BS EN 12570-ENGL 2000 lb24bb9 ObClb5 116 Page 7 EN 12570:2000 b
32、) lever or crank 1 O00 xT and 1 O00 x Ts L shall be equal to or greater than F Fs The maximum torque Ts is a greater torque than T and is applied during a short time. When specified by the customer the manufacturer shall quantify this short time in terms of a percentage of the valve travel. Figure 1
33、 - Handwheel Figure 2 - Lever or handwheel with crank O BSI 08-2000 STD.BSI BS EN 12570-ENGL 2000 1b24bb OBb5Lbb 052 BS EN 12570:ZOOO ES1 389ChiswickHighRoad London w4 4AL BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards. It present
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