DOPPELSITZVENTIL

摘要

Double sealed valve comprising: a valve seat in a communicating passage formed between an upper passage and a lower passage; a first vertical valve stem and a second vertical valve stem, which is hollow, slidably surrounding that first valve stem; said first stem having a first valve plug; said second stem having a second valve plug and a valve drive mechanism connected to said stems, between the first vertical valve stem (8) and the second valve stem (10) a passage for cleaning fluid is defined, being sealed towards the valve drive mechanism and having an outlet opening towards an annular space between the first and second valve plug being wherein the outlet opening of the passage is formed by a spray disc (23) having jet openings with an outletdirection causing a spiral flow in the annular space for cleaning the annular space (24).