| 摘要 |
<p>A spool valve having a body, spool and liner. The liner comprises a plurality of spacer-seal members between the body and spool. These members are of low friction material and interfit, having spool engaging lips which are pressure assisted toward their sealing position. In another embodiment, the spool has members of low friction material which engage lands in the body and have pressure assisted sealing lips.</p> |
