| 摘要 |
A seal checking unit is for a tap or a valve (201). The body (2) of the tap or valve consists of a hollowed out part (211) in which the closure (204) is displaced. The hollowed-out part is isolated from the upstream and the downstream sections when in the closure position. The valve contains a purge point (12). The purge point is especially connected to the hollowed-out part.
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