| 摘要 |
<p>It is an object of the invention to provide protection means (18) for a static seal (17) in a centrifugal pump having a dynamic seal arrangement (12). Another object of the invetion is to provide apparatus for the use with a dynamic seal (12) with a minimum number of auxiliary impellers (14) and for protecting the static seal (17) from contaminants. According to the broader aspects of the invention, a flushing protection arrangement (18) is provided between the static seal (17) and the auxiliary impeller (14), wherein a flushing fluid to protects the static seal (17) when the pump is not operating.</p> |
