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Priority to ES0167312UpriorityCriticalpatent/ES167312Y/en
Publication of ES167312UpublicationCriticalpatent/ES167312U/en
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Publication of ES167312YpublicationCriticalpatent/ES167312Y/en
Due to the perfecting of the butterfly valves, when making them watertight by vulcanizing the entire exterior surface of the butterfly, copying its same figure with elastic material, usually made of rubber, in the assembly it fits inside the body, making the valve watertight. (Machine-translation by Google Translate, not legally binding)
ES0167312U1971-03-271971-03-27
Improvement in butterfly valves
ExpiredES167312Y
(en)