VALVOLE DI NON RITORNO E SISTEMI E METODI DI OPERAZIONE DELLE STESSE

摘要

A system and a method for actuating a sealing element (101) of a check valve (100) are shown wherein the sealing element (101) is forced to a non-sealing position corresponding to an opening degree of the valve (100) equal to or higher than a first predefined opening degree when the increase of the opening degree with respect to the sealing position (T) is equal to or higher than a predefined threshold. In this way, the problem of vibration or“chattering”of the sealing element of the valve is efficiently prevented.