OSI) 5264/1 International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONMEXAYHAPOAHAH OPTAHW3AUMR IO CTAHAAPTM3AUWORGANISATION INTERNATIONALE DE NORMALISATION Pulps - Laboratory beating Part 1 : Valley beater method Pates - Raffinage de laboratoire -- Partie 1 : Methode a pile Valley First edition - 1979-07-15 UDC 676.1 : 542.67 Ref. No. ISO 5264/1-1979 (E) Descriptors : paper pulps, test specimen conditioning, refining, laboratory equipment. Price based on 6 pages Not for Resale Foreword ISo (the International Organization for Standardization) is a worldwide federation of national standards institutes (isO member bodies). The work of developing Interna- tional 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 International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. Paper, board and pulps, and was circulated to the member bodies in December 1977. Belgium Iran South Africa, Rep. of Canada Ireland Spain Chile Italy Sweden Czechoslovakia Kenya Switzerland Finland Mexico Turkey France Netherlands United Kingdom Germany, F. R. Norway USA Hungary Poland USSR India Romania No member body expressed disapproval of the document. @ International Organization for Standardization, 1979 Printed in Switzerland Copyright International Organization for Standardization ted without license from IHS Not for Resale ISO 5264/1-1979 (E) INTERNATIONAL STANDARD Pulps - Laboratory beating Part 1 : Valley beater method 0 Introduction 3 References It has been agreed that the uitimate aim of standardization of Iso638,Pulps-Determinationof drymatter content. laboratory beating should be to develop one test method which is internationally acceptable and which, if possible, allows the Iso 4119, Pulps - Determination of stock concentration energy consumption during beating to be measured. For prac- (Rapid method). tical reasons it has not proved possible to achieve this at pre. sent. Therefore, as an interim measure, in view of the ISo 5263, Pulps -- Laboratory wet disintegration. widespread use of the following methods Valley beater, 4Principle PFI mil, A measured amount of pulp of specified stock concentration is beaten between the bars of the roll and the bedplate of a Valley Jokro mill, beater. Samples of beaten pulp are taken at intervals during the beating. it has been decided to provide agreed guidance on the use of these equipments in order to achieve consistency of results with each instrument. While all three methods will show a similar trend in respect of the puip tested, the actual results Apparatus and auxiliary materials 5 cannot be correlated between different types of beater1). The Ordinary laboratory equipment and position will be kept under review, and the methods will be replaced by a single method as soon as practicable. 5.1 Valley beater, as described in annex A. Scope 1 5.2 Timer. This International Standard specifies a method, using a Valley beater, for the laboratory beating of pulp. The description is 5.3 Balance, capable of weighing the sample to an error of limited to the furnishing and beating of the stock, the less than 1 g. withdrawal and distribution of samples, and the beating equip- ment. 5.4 Distilled water, or deionized water, or water of similar quality. The beating is a preliminary step in testing the physical proper- ties of pulp. - Distilled water, or water of similar quality, is particularly NOTE recommended with a view to obviating any difficulties that might arise Part 2 specifies a method of laboratory beating using a PFl mill from the use of different qualities of water by the interested parties. and Part 3 a method u