Valve marker with transit channel in the valve seat

摘要

The device has a receiving housing (10) with a receiving space (11) for the medium, where the receiving space has an intermediate wall (20) with clearance hole (21). A passage channel (20k) is arranged in a seat (23) that is arranged in the area of the clearance hole. The passage channel allows a replacement of air or medium between storage space (11v) and working space in closure- or mixing body (22). The closure- or mixing body is supported on the seat. The replacement takes place by the passage channel.