| 摘要 |
<p>1386322 Valves KOEHRING CO 28 April 1972 [26 Oct 1971] 19872/72 Heading F2V In a valve spool having throttle notches 40, Fig. 1, formed at the ends of its lands 31 to 34, the notches contain flow directing means in the form of posts 42 which tend to minimize axial flow forces exerted on the spool. The notches and posts may be circular with the post diameter between 1/3 and ¥ of the notch diameter. The posts are preferably inclined between 30 and 90 degrees to the spool axis but may be inclined by an angle greater than 90 degrees, Fig. 4 (not shown), especially when flow passes radially inwardly through the notches.</p> |
