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Standard
ISO 7429-1
First edition
Fine bubble technology —
2024-04
Industrial and consumer device
applications —
Part 1:
Assessment of water pressure
driven nozzles by evaluating size
and concentration indices of
generated fine bubbles
Reference number
ISO 7429-1:2024(en) © ISO 2024
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ISO 7429-1:2024(en)
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Published in Switzerland
© ISO 2024 – All rights reserved
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ISO 7429-1:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Types of nozzles . 2
5 Requirements . 2
5.1 Samples .2
5.2 Measuring instruments .2
6 Environment . 2
7 Evaluation . 3
7.1 General .3
7.2 Placement of the nozzle on the retention container .3
7.3 One-way flow .3
7.3.1 General .3
7.3.2 Test system configuration .3
7.3.3 Evaluation procedure . .6
7.4 Circulation flow for ultrafine bubbles (UFBs) .
...