ISO INTERNATIONAL STANDARD 27895 First edition 2009-12-15 Vacuum technology Valves Leak test Technique du vide - Vannes a vide - Essai d'etancheite des vannes a vide Reference number ISO 27895:2009(E) @ ISO 2009 ISO 27895:2009(E) Contents Page Foreword Introduction 1 Scope 2 Normative references 3 Terms and definitions 4 Symbols. 5 Requirements.. 6 Test methods ... 6.1 Valve seat leak test.. .5 6.2 Valve body leak test.. 6.3 Leak test on minimum and maximum pressures of compressed air for pneumatic valve operation (optional)... .9 6.4 Leak test on minimum and maximum torques of manual valve (optional) 6.5 Leak test in operating temperature range (optional) .... .9 6.6 Leak test after baking (optional)... 7 Testreport Bibliography... @ IS0 2009 - All rights reserved ili ISO 27895:2009(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through ISsO technical committees. Each member body interested in a subject for which a technical committee has been International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 27895 was prepared by Technical Committee ISO/TC 112, Vacuum technology iv @IsO2009-Allrightsreserved