Valves having a stem packing of alternating layers of perfluoroelastomer and high temperature polymer provide outstanding sealing performance against corrosive fluids and high temperatures.
申请公布号
US5549276(A)
申请公布日期
1996.08.27
申请号
US19930088015
申请日期
1993.07.06
申请人
E. I. DU PONT DE NEMOURS AND COMPANY
发明人
PITTMAN, GARY M.;SENIOR, KENNETH A.;STRUNK, JOHN N.;THONDUKOLAM, KRISHNAN R.
