DE4011274

Double-plate gate valve, whose gate plate (16) can be displaced by an operating rod (22) and is provided with a pipe bridge (23) which has two sealing rings (24, 25) which are connected to one another by means of a compensator (26) and can be pressed against the sealing seats (14, 15) of the gate valve housing (11) in the open position of the gate valve (10), subject to elastic pretensioning, the compensator (26) consisting of an inner pipe section (27) and an outer pipe section (28) which extends coaxially thereto. The outer pipe section (28) is fixedly connected, especially welded, to both sealing rings (24, 25). In addition, it has a recess (31) extending over the circumference. The inner pipe section (27) is fixedly connected to only one (25) of the two sealing rings and can move axially with respect to the other (24) sealing ring. A gas pressure, which is greater than the pressure in the gate valve passage when the gate valve is in the open position, can be set within the gate valve housing (11).