| 摘要 |
<p>This invention relates to a self centered direct acting pressure relief valve for tractor hydraulic system comprising of valve seat with ball having required hardness, a spool guided by the adapter having a cavity matching the head of the valve seat and a clearance provided to reduce the difference between the opening pressure and the full-flow pressure; and a spring seat that transfers the load of the spring on the valve spool through a ball to eliminate the offset between the load line of the spring and the valve centerline.</p> |
