| 摘要 |
Described is a pipe flow cut-off device with a closure element which, in a first position, allows liquid to flow from an inlet (1a) through to an outlet (4a) and, in a second position, cuts off the flow. The device has a control unit (10, 12a, 19, 19a) designed to operate the closure element, an additional cut-off valve (5b) fitted on the outlet side, and a discharge opening (2a). The closure element has a shut-off valve (7) fitted on the inlet side and a discharge valve (6), the devices which actuate the shut-off valve and discharge valve operating in conjunction with each other.
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