LINED BUTTERFLY VALVE
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专利名称：LINED BUTTERFLY VALVE
发明人：GRAVES G,US,PETROSKY W,US,POPE G,US,STEWART J,US
申请号：US3778028D
申请日：19720802
公开号：US3778028A
公开日：
19731211
专利内容由知识产权出版社提供
摘要：A butterfly valve for use under both pressure and vacuum conditions in corrosive fluid service, the valve having a body member, a substantially rigid plastic resin lining seated within a bore of the body, a disc encapsulated with plastic resin and pivotally mounted within the bore, and first and second packing means disposed between supporting members of the disc and the lining of the body to provide an effective seal against leakage therebetween. In a further embodiment, a resilient seat is disposed between the lining and body member to yieldably urge the lining into engagement with the disc for more positive closure of the disc relative to the body and the lining.
申请人：JOHN L DORE CO,US
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