| 摘要 |
<p>A valve system includes a valve and apparatus for supplying fluids to the valve. The valve includes a valve enclosure and a valve stem movable through the valve enclosure. The valve enclosure includes a valve body and a valve bonnet. The valve system includes a first fluid supply to supply fluid to the region of the valve stem that moves through the valve enclosure, and second and third fluid supplies to supply fluid to a region of contact between the valve body and valve bonnet.</p> |
