Protection valve, particularly against frost damage, and protection method for a water-distribution plant against frost damage

摘要

This concerns a valve whose closing element (17) is capable of controlling the passage (16) extending between an inlet end-piece (15A) and an outlet end-piece (15D). According to the invention, there is provision for a pressure sensor (22) which is sensitive to the pressure prevailing in a circuit section extending from a non-return valve (24) disposed upstream from the closing element (17) to a stopping element (12) disposed downstream from the latter, and which pressure sensor controls the means for actuating this closing element (17). Application, especially, to frost protection of any water distribution installation. IMAGE