摘要 |
<p>The pressure cover has a plurality of radially outwardly directed teeth while the housing has a corresponding plurality of inwardly directed teeth. The cover can be inserted past the housing teeth and then rotated to bring the teeth into alignment for closing off the housing. In addition, a flange ring is provided to seal a gap between the cover and housing and the sealing means are disposed between the flange ring and the cover and housing, respectively. The sealing means can be replaced without having to detach the cover.</p> |