DUAL-SEAT VALVE ABLE TO SWITCH IN A LEAK-FREE MANNER

摘要

The invention relates to a dual-seat valve that switches without leakage. On both the valve seat and the closing member, a respective cylindrical face is provided, and these faces together form a throttle gap. In the cleaning stroke of the closing member, pressure spikes in the leakage chamber are averted. In the cleaning of the seat, the flow of cleaning medium is also comparatively insensitive to fluctuations in the cleaning stroke.