NTERNATIONAL STANDARD (TSO) 3661 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEKAYHAPOJHAH OPTAHH3ALIHS TIO CTAHIAPTH3ALIMH.ORGANISATION INTERNATIONALE DE NORMALISATION End-suction centrifugal pumps -- Baseplate and installation dimensions Pompes centrifuges a aspiration enbout-Dimensions relatives aux socles eta I'installation First edition-1977-02-15 1SO 3661-1977 (E) UDC 621.671 Ref. No. 1SO 3661-1977 (E) Descriptors : centrifugal pumps, specifications, holders, installing, dimensions. Price based on 3 pages FOREWORD Iso (the International Organization for Standardization) is a worldwide federation of national standards institutes (Iso Member Bodies). The work of developing International Standards is carried out through Iso Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set up has the right to be represented on that Committee. International organizations, governmental and non-governmental, in liaison with Iso, also take part in the work. Draft Internationalt Standards adopted by the Technical Committees are circulated to the Member Bodies for approval before their acceptance as International Standards by the Iso Council. International StandardIso3661 was drawn up by Technical Committee ISO/TC 115,Pumps, and was circulated to the Member Bodies in February1975. It has been approved by the Member Bodies of the following countries : Belgium Italy Sweden Brazil Mexico Switzerland Czechoslovakia Netherlands Turkey France Poland United Kingdom Germany Romania Yugoslavia Hungary South Africa, Rep. of Israel Spain The Member Bodies of the following countries expressed disapproval of the document on technical grounds : Australia Canada Japan U.S.A. @ International Organization for Standardization, 1977 Printed in Switzerland ISO 3661-1977 (E) INTERNATIONALSTANDARD End-suction centrifugal pumps -- Baseplate and installation dimensions 1SCOPE IS02858,End-suctioncentrifugalpumps(rating16bar) Designation, nominal duty point and dimensions. This international Standard specifies the basic baseplate and installation dimensions for end-suction centrifugal IECPublication72,Dimensionsand output ratingsfor pumps. Alternative numbers and locations of baseplate rotating electrical machines-Frame numbers 56 to 400 fixing holes are given to suit individual installations. and flange numbers F55 to F1080. 4 BASEPLATEDIMENSIONS 2 FIELD OF APPLICATION The dimensions and the reference numbers of baseplates The dimensions and other data given in this International are given in figure 1 and table 1. Standard are intended primarily for use with centrifugal pumps in accordance with Iso 2858, coupled to foot- mounted electric motors for installation on a foundation. 5BASICINSTALLATIONDIMENSIONS Where suitable, this International Standard may be used for The baseplate number appropriate to a given pump other types of pump. designation and the corresponding electric motor frame number are obtained from table 2. The dimensions of the baseplate corresponding to this number are then obtained from table 1 and the basic 3 REFERENCES installation dimensions from the iast four columns in ISO/R 273,Clearance holes formetric bolts. table 2. Coovriaht International Oraanization for Standardizatior