CPC Subgroup
F16K 21/18 closed when a rising liquid reaches a predetermined level (float-actuated valves F16K31/18)
Full Title
Fluid-delivery valves, (for liquid handling B67D; for flushing devices for water-closets or the like E03D) > Self-closing valves, i.e. closing automatically after operation > closed when a rising liquid reaches a predetermined level (float-actuated valves F16K31/18)
2 direct subcodes
Child Classifications
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- F16K 21/20 by means making use of air-suction through an opening closed by the rising liquid