METHODS FOR PRODUCING A VALVE SUB-ASSEMBLY AND A VALVE AND SUB-ASSEMBLIES AND VALVES RESULTING FROM SAID METHODS

摘要

1341254 Casting composite articles PONTA-MOUSON SA and PLAST-INDUSTRIE 19 April 1971 [24 April 1970] 26585/71 Heading B3F [Also in Divisions B5 and F2] A metal valve body may be cast around a valve sub-assembly IV comprising a valve closing element, rubber sealing rings, and rigid rings. The sheath is cut around the stem at 40 held together by a polyvinyl chloride sheath 6c shrunk about the sub-assembly.