Foreword

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This document was prepared by Technical Committee ISO/TC 153, Valves, in collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 69, Industrial valves, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

This first edition cancels and replaces ISO 6948:1981, ISO 7841:1988 and ISO 7842:1988, which have been technically revised.

The main changes are as follows:

— merging of ISO 6948:1981, ISO 7841:1988 and ISO 7842:1988;
— update of the technical content according to state-of-the-art;
— addition of the terminological entry on subcooling (3.2);
— addition of a data sheet for test methods A and B on steam trap discharge capacity in A.3.3 and in A.4.3;
— addition of a computation formula [Formula (B.4)];
— addition of a data sheet for test methods A and B on steam loss test in B.3.4 and B.4.4.

Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html.

BS EN ISO 5117:2023

Automatic steam traps. Production and performance characteristic tests

Current

Published:

31 Jul 2023