1、BRITISH STANDARD BS EN 735:1995 Overall dimensions of rotodynamic pumps Tolerances The European Standard EN 735:1995 has the status of a British Standard. ICS 23.080BSEN 735:1995 This British Standard, having been prepared under the directionof the Engineering SectorBoard, was published underthe aut
2、hority of the Standards Board and comes into effect on 15 December 1995 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference MCE/6 Draft for comment 92/75553 DC ISBN 0 580 24767 8 Committees responsible for this British Standard The preparation of this Br
3、itish Standard was entrusted to Technical Committee MCE/6, Pumps and pump testing, upon which the following bodies were represented: British Chemical Engineering Contractors Association British Hydromechanics Research Association British Pump Manufacturers Association Department of Trade and Industr
4、y (National Engineering Laboratory) Electricity Association Energy Industries Council UK Offshore Operators Association Limited Water Services Association of England and Wales The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Engineering Eq
5、uipment and Materials Users Association Process Plant Association South West Water Authority Amendments issued since publication Amd. No. Date CommentsBSEN 735:1995 BSI 11-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 735 3 List of referenc
6、es Inside back coverBSEN 735:1995 ii BSI 11-1999 National foreword This British Standard has been prepared by Technical Committee MCE/6 and is the English language version of EN 735 Overall dimensions of rotodynamic pumps Tolerances, published by the European Committee for Standardization (CEN), in
7、the development of which the UK took an active part. 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 o
8、bligations. Cross-references Publication referred to Corresponding British Standard ISO 496:1973 BS 5186:1975 Specification for shaft centre heights BS EN 22678 General tolerances ISO 2768-1:1989 (EN 22768-1:1993) Part 1:1993 Tolerances for linear and angular dimensions without individual tolerance
9、indications ISO 2768-2:1989 (EN 22768-2:1993) Part 2:1993 Geometrical tolerances for features without individual tolerance indications Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 6, an inside back cover and a back cover.
10、 This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 735 April 1995 ICS 23.080 Descriptors: Rotodynamic pumps, dimensions, overall di
11、mensions, dimensional tolerances English version Overall dimensions of rotodynamic pumps Tolerances Dimensions d encombrement des pompes rotodynamiques Tolrances Anschlumae fr Kreiselpumpen Toleranzen This European Standard was approved by CEN on 1994-10-03. CEN members are bound to comply with the
12、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 to the Central Secretariat or
13、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 CEN Central Secretariat has the same status as the official ve
14、rsions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normali
15、sation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1995 Copyright reserved to CEN members Ref. No. EN 735:1995 EEN735:1995 BSI 11-1999 2 Foreword This European Standard has been prepared by SC4, Rotodynamic pumps, of CEN/TC 197, Pumps, the Secretariat of w
16、hich is held by DIN, based on a proposal document, CEN/TC 197/SC 4 N 23, submitted by the European Committee of Pump Manufacturers (EUROPUMP) in December 1990, and was adopted for CEN enquiry at the CEN/TC 197/SC 4 meeting on 1991-03-14 in Frankfurt. This European Standard shall be given the status
17、of a national standard, either by publication of an identical text or by endorsement, at the latest by October 1995, and conflicting national standards shall be withdrawn at the latest by October 1995. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement
18、this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 End suction centrifugal pumps 3 4 Roto
19、dynamic pumps other than end suction centrifugal pumps 5 Figure 1 Overall dimensions 3 Table 1 Acceptable tolerances for overalldimensions 4 Table 2 Acceptable tolerances for overalldimensions 5EN 735:1995 BSI 11-1999 3 1 Scope This European Standard specifies the acceptable tolerances for overall d
20、imensions of rotodynamic pumps with particular requirements for horizontal, single stage, end suction centrifugal pumps. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropria
21、te 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 incorporated in it by amendment or revision. For undated references the latest edition of the publicatio
22、n referred to applies. ISO 496:1973, Driving and driven machines Shaft heights. ISO/R 775:1969, Cylindrical and 1/10 conical shaft ends. ISO 2768-1:1986, General tolerances Part1:Tolerances for linear and angular dimensions without individual tolerance indications. ISO 2768-2:1989, General tolerance
23、s Part2:Geometrical tolerances for features without individual tolerance indications. 3 End suction centrifugal pumps End suction centrifugal pumps with dimensions toleranced in accordance with this standard, shall have their dimensions within the appropriate tolerance band shown in Table 1, as illu
24、strated in Figure 1. Figure 1 illustrates a pictorial representation of an end-suction pump. Pumps to this standard do not need to correspond to this pictorial representation; only the indicated dimensions are to be as specified. Figure 1 Overall dimensionsEN 735:1995 4 BSI 11-1999 Table 1 Acceptabl
25、e tolerances for overall dimensions Dimensions in millimetres Overall dimension Tolerance group code Nominal dimension field/acceptable tolerances Basic standard h 12 a E1 k 50 50 k 250 250 k 630 630 k 1000 1000 ISO 496 d E2 k 50 50 k 95 ISO/R 775 k 6 m 6 n 2 b E3 6 k 30 30 k 120 120 k 400 400 k 100
26、0 1000 k 2000 ISO 2768-1 ISO 2768-2 n 3 b m 2 b w b f 12 be l 0,2 0,3 0,5 0,8 1,2 a f 11 c h 11 d E4 6 k 160 160 k 250 250 k 400 400 k 630 630 k 1000 1000 k 1600 1600 h 2 2 2,5 3 4 5 6 8 b m 1 E5 6 k 160 160 k 250 250 k 400 400 k 630 630 k 1000 1000 k 1600 1600 n 1 3 3,75 4,5 6 7,5 9 12 a The dimens
27、ion h 12indicates the distance from the shaft end centreline to the underside of the rear foot. b The tolerances apply to the distance between fixing screws. Pumps designed with holes or slots shall allow for the appropriate tolerance. c The dimension f 11indicates the distance from the discharge fl
28、ange centreline to the shaft end. d The dimension h 11indicates the distance from the underside face of the feet to the suction flange centreline. e The dimension f l2indicates the distance from the shaft end to the centreline of the fixing holes axes of the feet. 0 0,4 0 0,5 0 1 0 1,5 0 2EN 735:199
29、5 BSI 11-1999 5 4 Rotodynamic pumps other than end suction centrifugal pumps Rotodynamic pumps other than end suction centrifugal pumps with dimensions and tolerances in accordance with this standard shall have their main dimensions within the appropriate tolerance band shown in Table 2. Table 2 Acc
30、eptable tolerances for overall dimensions Dimensions in millimetres Overall dimensions Nominal dimension field/acceptable tolerances Tolerance group in accordance with Table 1 Axis height E 1 Shaft end diameter E 2 Distance between two machined surfaces E 3 Distance between machined and unmachined s
31、urfaces E 4 Distance between unmachined surfaces 6 k 160 160 k 250 250 k 400 400 k 630 630 k 1000 1000 k 1600 1600 4 5 6 8 10 12 166 blankBSEN 735:1995 BSI 11-1999 List of references See national foreword.BS EN 735:1995 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is t
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