| 摘要 |
The invention relates to a valve assembly that can be provided of a length to meet conventional fitting dimensions and requirements. The valve assembly includes a valve body housing, at least first and second valve balls. Between the first and second valve balls are provided first and second valve seats. The valve seats are biased towards their respective valve balls. The valve seats, that lie between the valve balls, are typically provided as part of a common valve seat assembly that includes springs and the like. |
