BS EN 12756-2001 Mechanical seals – Principal dimensions, designation and material codes.pdf
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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12756:2001 The Euro
2、pean Standard EN 12756:2000 has the status of a British Standard ICS 21.140 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Mechanical seals Principal dimensions, designation and material codes This British Standard, having been prepared under the direction of the Engineering
3、Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 February 2001 BSI 02-2001 ISBN 0 580 35768 6 BS EN 12756:2001 Amendments issued since publication Amd. No.DateComments National foreword This British Standard is the official English language v
4、ersion of EN 12756:2000. The UK participation in its preparation was entrusted by Technical Committee MCE/6, Pumps and pump testing, to Subcommittee MCE/6/2, Dimensions and technical specifications, which has the responsibility to: aid enquirers to understand the text; present to the responsible Eur
5、opean committee any enquiries on the interpretation, 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 secretar
6、y. Cross-references The British Standards 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 using the Find facility of the BSI Standards Electr
7、onic 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 application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This doc
8、ument comprises a front cover, an inside front cover, the EN title page, pages 2 to 11 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12756 December 2000 ICS 21.140 English versio
9、n Mechanical seals - Principal dimensions, designation and material codes Garnitures mcaniques dtanchit - Dimensions principales, dsignation et codes matriaux Gleitringdichtungen - Hauptmae, Bezeichnung und Werkstoffschlssel This European Standard was approved by CEN on 8 November 1999. CEN members
10、are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application t
11、o the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same stat
12、us as the official versions. 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 COMMITTEE FOR STANDAR
13、DIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2000 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12756:2000 E Page 2 prEN 12756:2000 Contents Page For
14、eword3 1Scope4 2Normative references4 3Dimensions5 4Standard designation9 5Material key11 w w w . b z f x w . c o m Page 3 prEN 12756:2000 Foreword This European Standard has been prepared by Technical Committee CEN/TC 197 “Pumps“, the secretariat of which is held by AFNOR. This European Standard sh
15、all be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2001, and conflicting national standards shall be withdrawn at the latest by June 2001. According to the CEN/CENELEC Internal Regulations, the national standards organi
16、zations 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. w w w . b z f x w . c
17、o m Page 4 prEN 12756:2000 1 Scope This European Standard defines the principal dimensions for the internal installation of single and multiple mechanical seals with (rotating) spring units into the pump sealing cavity according to ISO 3069 as minimum cavity dimensions as typical for centrifugal pum
18、ps in accordance with EN 22858 and EN 733. It also gives the seal designations and material codes to be used. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places i
19、n 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 incorporated in it by amendment or revision. For undated references the latest edition of the publication referred
20、to applies. EN 733, End-suction centrifugal pumps, rating 10 bar with bearing bracket ? Nominal duty point, main dimensions, designation system EN 22858, End suction centrifugal pumps (rating 16 bar) ? Designation, nominal duty point and dimensions (ISO 2858:1975) ISO 1382, Rubber ? Vocabulary Trili
21、ngual edition ISO 1629, Rubbers and latices ? Classification, symbols ISO 2768-1, General tolerances ? Part 1: Tolerances for linear and angular dimensions without individual tolerance indications ISO 3069, End suction centrifugal pumps ? Dimensions of cavities for mechanical seals and for softpacki
22、ng ISO 5199, Technical specifications for centrifugal pumps ? Class II ISO 9905, Technical specifications for centrifugal pumps ? Class I ISO 9908, Technical specifications for centrifugal pumps ? Class III w w w . b z f x w . c o m Page 5 prEN 12756:2000 3 Dimensions The mechanical seals (abbreviat
23、ion: GLRD1? ) and cavities need not correspond to the illustrations, however, the dimensions given shall be complied with. The figures show O-rings as the flexible elements but other shapes of seals may also be used. General tolerances:ISO 2768?m 3.1 Example for a single mechanical seal2? ? with rot
24、ating spring unit, version N and K3? ? NOTEAlternative arrangements using the same dimensions can be possible. Type U without shaft step Type B with shaft step Dimensions in millimetersDimensions in millimeters Key 1 rounded 2 spring loaded lead face 3 seat Figure 1 Examples for single mechanical se
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