ISO INTERNATIONAL STANDARD 11727 First edition 1999-05-01 Pneumatic fluid power ldentification of ports and control mechanisms of control valves and other components Transmissions pneumatiques ldentification des orifices et des mécanismes de commande des distributeurs de commande et autres composants Tso Reference number ISO 11727:1999(E) by IHS under lic Not for Resale ISO 11727:1999(E) Contents 1Scope 2 Normative reference 3 Terms and definitions 4 General principles 5 Directional control valves.. 5.1 Use of single-digit identification numbers 5.2 Use of two-digit identification numbers 5.3 Manifold port identifications. 5.4 External pilot supply port identification. 6 5.5 Pilot exhaust ports identification 6 Quick exhaust, shuttle and lockout valves .... 7 Shut-off valves . 8 Flow control valves, non-return (check) valves and relief valves.. 9 Pressure regulators and filter-regulators.. 10 Filters, lubricators and ancillary units 11Examples. 12 Identification statement Annex A (informative) Symbols giving examples of identification , Bibliography.. @ISO1999 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic InternationalOrganizationforStandardization Casepostale56·CH-1211Geneve20·Switzerland Internet [email protected] Printed in Switzerland Not for Resale @ISO ISO 11727:1999(E) Foreword ISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(lSo member bodies). The work of preparing International Standards is normally carried out through iSO technical liaison with IsO, also take part in the work. ISO collaborates closely with the 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 3. 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 International Standards ISO 11727 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 5, Control products and components. Annex A of this International Standard is for information only ii