1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12157:1999 The Euro
2、pean Standard EN 12157:1999 has the status of a British Standard ICS 23.080 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Rotodynamic pumps Coolant pump units for machine tools Nominal flow rate, dimensionsThis British Standard, having been prepared under the direction of th
3、e Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 October 1999 BSI 10-1999 ISBN 0 580 32809 0 BS EN 12157:1999 Amendments issued since publication Amd. No. Date Comments National foreword This British Standard is the English lang
4、uage version of EN 12157:1999. The UK participation in its preparation was entrusted to Technical Committee MCE/6, Pumps and pump testing, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or prop
5、osals 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 committee can be obtained on request to its secretary. Cross-references The British Standards which implement inter
6、national 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 purport to incl
7、ude 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 cover, the E
8、N title page, pages 2 to 9 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.(8523($167$1$5 (1 1250(8523e(11( (8523b,6$03/(HVLJQDWLRQRIDVXFWLRQSXPS6ZLWKDQRPLQDOFDSDFLWRIOPLQDQGZLWKDWHUPLQDOER DUUDQJHPHQW 3XPS(163DJH (1 %6, 1RPLQDOFDSDFL
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14、RHFHHG& 127()RUSXPSVLQWHQGHGIRURWKHUXVHVWKHPDQXIDFWXUHUVKRXOGEHFRQVXOWHG ULYHPRWRU 7KHGULYHPRWRUVKDOOEHWRWDOOHQFORVHGDFFRUGLQJWRWSH,3DVVSHFLILHGLQ(1 7KHUDWHGYROWDJHDQGIUHTXHQFRIWKHPRWRUVKDOOEHDFFRUGLQJWR,(&3DJH (1 %6, 7DEOH$UUDQJHPHQWRIWHUPLQDOERRQVXPSSXPSVDQGVXFWLRQSXPSV $UUDQJHPHQW 9LHZIURPWRSRISX
15、PS &RPPHQW 2XWOHW 7HUPLQDOERRUFDEOHHQWURSSRVLWHWRRXWOHW IODQJHVLGH 6WDQGDUGHHFXWLRQIRUVXPSSXPS 2XWOHW 7HUPLQDOERRUFDEOHHQWUWRWKHOHIWRIWKH RXWOHWIODQJHVLGH 6WDQGDUGHHFXWLRQIRUVXFWLRQSXPS 2XWOHW 7HUPLQDOERRUFDEOHHQWURQWKHRXWOHW IODQJHVLGH 2XWOHW 7HUPLQDOERRUFDEOHHQWUWRWKHULJKWRIWKH RXWOHWIODQJHVLGH 0D
16、WHULDOV 7KHPDWHULDOVXVHGIRUWKHFRQVWUXFWLRQRIWKHSXPSVKDOOEHVSHFLILHGEWKHPDQXIDFWXUHUDQGOLVWHGLQWKH PDQXIDFWXUHUVFDWDORJXHRUPDQXDO,QGLFDWLRQDERXWFRPSDWLELOLWZLWKPDLQIOXLGVVKDOOEHLQFRUSRUDWHGBS EN 12157:1999 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | |
17、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for preparing Bri
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