BS IS0 21360-4:2018 BSl Standards Publication Vacuum technology Standard methods for measuring vacuum-pump performance Part 4: Turbomolecular vacuum pumps bsi. BS ISO 21360-4:2018 BRITISH STANDARD National foreword This British Standard is the UK implementation of IS021360-4:2018 Committee MCE/8/-/4, Vacuum technology. A list of organizations represented on this committee can be obtained on requestto its secretary. This publication does not purport to include all the necessary provisions ofa contract.Users areresponsiblefor its correctapplication. @The British Standards Institution 2018 Published by BSI Standards Limited 2018 ISBN9780580920479 ICS 23.160 Compliance with a British Standard cannot confer immunity from legalobligations. This British Standard was published under the authority of the StandardsPolicyand StrategyCommittee on31August2018. Amendments/corrigendaissuedsincepublication Date Text affected BSIS021360-4:2018 INTERNATIONAL ISO STANDARD 21360-4 First edition 2018-07-19 Vacuum technology - Standard methods for measuring vacuum-pump performance Part 4: Turbomolecular vacuum pumps TechniqueduvideMethodesnormaliseespourmesurerles performancesdespompesavide- Partie4:Pompesa videturbomoleculaires Reference number IS0 21360-4:2018(E) ISO @IS0 2018