A low-leakage valve apparatus which reduces fugitive emissions from valves to the ambient atmosphere. A secondary packing chamber or gland is installed on an existing valve to intercept leakage past the valve's original primary packing gland, which otherwise would escape past the valve stem to the atmosphere.
申请公布号
WO2004113775(A3)
申请公布日期
2005.06.09
申请号
WO2004US19475
申请日期
2004.06.17
申请人
GIANT INDUSTRIES, INC.;LAURENT, JOHN, ARTHUR;HALLOCK, JAMES, PATRICK
