| 摘要 |
The invention provides an apparatus for carrying a fluid flow having at least one fluid inlet, at least one fluid outlet, a plurality of alternative fluid flow paths therebetween and valve for selecting one of the said fluid flow paths to carry a fluid flow from the or a fluid inlet to the or a fluid outlet, wherein the said valve (14) and at least part of the said alternative fluid flow paths (26, 70) are housed within a removable portion (10) of the apparatus to facilitate maintenance. Preferably, seals (32) are provided between the removable portion (10) and the remainder of the apparatus, the seals (32) being either carried by the removable portion (10) or exposed for access by removal of the removable portion (10). This arrangement facilitates removal of blockages and replacement of seals.
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