OSI 5264/1 International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION+MEKAYHAPOAHAR OPTAHM3AUWH IO CTAHAPTW3AUMW-ORGANISATION INTE RNATIONALE DE NORMALISATION Pulps -- Laboratory beating Part 1 : Valley beater method Pates-Raffinage de laboratoire -Partie 1:Methode a pile Valley First edition1979-07-15 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 vithout license from IHS 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. International Standard ISO5264/1was developed byTechnical Committee ISO/TC 6, Paper, boardand pulps,and was circulated to the member bodies in December 1977. It has been approved by the member bodies of the following countries : 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 Poland. Hungary USSR India Romania No member body expressed disapproval of the document. International Organization forStandardization,1979 Printed in Switzerland Copyright intematinal Organizatin for Standardization without license from IHS Not for Resale ISO5264/1-1979(E) INTERNATIONALSTANDARD Pulps - Laboratory beating Part 1 : Valley beater method 0 Introduction References It has been agreed that the ultimate aim of standardization of Iso 638, Pulps - Determination of dry rmatter content. laboratory beating should be to develop one test method which is internationally acceptable and which, if possible, allows the ISO4119,Pulps- Determination of stock concentration energy consumption during beating to be measured. For prac- (Rapidmethod). 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-Laboratorywet disintegration. widespread use of the following methods Vallcy bcater, 4 Principle PFI mill, Ameasured 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 pulp tested, the actual results 5 Apparatus and auxiliary materials cannot bc corrclated between different types of beater1). The position will be kept under review, and the methods will be Ordinary laboratory equipment and replaced byasinglemethodas soonaspracticable. 5.1 Valley beater, as described in annex A. 1 Scope 5.2 Timer. This International Standard specifies a method, using a Vallcy 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. NOTE Distilled water, or water of similar quality, is particularly - recommended with a view to obviating any difficulties that might arise Part 2 specifies a meth