| 摘要 |
<p>A valve (100) comprising a valve body (124) defining a flow path (126), a seat (110) upon which a closure member (108) may rest for blocking an outlet port of the valve body, and a spacer (142) removably mounted in the valve body to provide at least one arresting surface against which the closure member (108) may abut when displaced in an open position by fluid pressure. The spacer prevents the closure member from frictionally contacting the inner surfaces of the valve body (124).</p> |
