1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12570:2000 The Euro
2、pean Standard EN 12570:2000 has the status of a British Standard ICS 23.060.01 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Industrial valves Method for sizing the operating elementThis British Standard, having been prepared under the direction of the Engineering Sector Com
3、mittee, was published under the authority of the Standards Committee and comes into effect on 15 August 2000 BSI 08-2000 ISBN 0 580 34914 4 BS EN 12570:2000 Amendments issued since publication Amd. No. Date Comments National foreword This British Standard is the English language version of EN 12570:
4、2000. The UK participation in its preparation was entrusted by Technical Committee PSE/7, Valves, to Subcommittee PSE/7/1, Valves - Basic standards, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretatio
5、n, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate 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 im
6、plement 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 using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not pu
7、rport to include all 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, an inside front
8、 cover, the EN title page, pages 2 to 7 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.(8523($167$1$5 1250(8523e(11( (8523b,6&+(1250 (1 0D ,&6 (QJOLVKYHUVLRQ ,QGXVWULDOYDOYHV0HWKRGIRUVLLQJWKHRSHUDWLQJHOHPHQW 5RELQHWWHULHLQGXVWULHOOH0
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27、PH:KHQVSHFLILHGEWKH FXVWRPHUWKHPDQXIDFWXUHUVKDOOTXDQWLIWKLVVKRUWWLPHLQWHUPVRIDSHUFHQWDJHRIWKHYDOYHWUDYHO )LJXUH+DQGZKHHO )LJXUH/HYHURUKDQGZKHHOZLWKFUDQNBS EN 12570:2000 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
28、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK v
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