| 摘要 |
<p>A valve assembly (10) comprising a valve stem (12), an annular bonnet configured to receive the valve stem, a valve disk (14) coupled to one end o f the valve stem, a seal (22, 24), and an insert. The seal is disposed adjacen t the valve disk (14) and has a top surface and a bottom surface. The top surface includes a first pair of sealing ridges extending upwardly therefrom and the bottom surface includes a second pair of sealing ridges extending downwardly therefrom. The insert (18) includes a recess configured to receiv e the seal (16) that performs a sealing function and a biasing function. The valve assembly (10) can easily be configured to open in either a clockwise o r counterclockwise direction without resort to adapters or other additional pieces by rotating the bonnet/valve stem sub~assembly 90~ relative to the insert.</p> |
