<p>A ball valve includes a valve element (22) and a single piece packing (32) that seals the valve element within a valve cavity (20). The single piece packing is installed over the valve element at room temperature or may be molded thereon. The valve element may include a flow control element such as a ball (24) and upper (28) and lower (30) trunnions. The various dimensions of the valve element and packing are selected to facilitate room temperature assembly and to substantially reduce the volume of packing material, thereby improving the performance of the valve over wider temperature ranges and pressure ratings.</p>
申请公布号
CA2473685(C)
申请公布日期
2011.12.13
申请号
CA20032473685
申请日期
2003.01.17
申请人
SWAGELOK COMPANY
发明人
TIMKO, JARED S.;LIPPUCCI, THOMAS A.;KVARDA, ERIC M.;FRY, BRANDON J.;GOTCH, JAMES E.