Leckagefrei schaltendes Doppelsitzventil

摘要

The invention relates to a dual-seat valve able to switch in a leak-free manner. To this end, the invention provides for the valve seat and the closing member each to have a cylindrical surface, which together form a throttle gap. During the cleaning stroke of the closing member, pressure peaks in the leakage chamber are avoided. Furthermore, when the seat is cleaned the cleaning agent flow is comparatively insensitive to tolerances in the cleaning stroke.