公开(公告)号：EP3239566A4

公开(公告)日：2018-08-01

申请号：EP15872782

申请日：2015-12-14

申请人： HITACHI GE NUCLEAR ENERGY LTD ,  OKANO VALVE MFG CO LTD

发明人： KAWAHARA YOSHIHARU ,  KIYOTOKI YOSHIHISA ,  NAKASHIMA TAKAYOSHI ,  SAKEMURA KEISUKE ,  KANEMURA YOSHITOMO ,  IMOTO YUKIO

IPC分类号： F16K1/24 ,  F16K1/22 ,  F16K1/226 ,  F16K1/32 ,  F16K25/00 ,  F16K31/05

CPC分类号： F16K25/005 ,  F16K1/22 ,  F16K1/222 ,  F16K1/226 ,  F16K1/24 ,  F16K1/32 ,  F16K31/05

摘要： Provided is a butterfly valve configured so that the sealing performance of the butterfly valve is ensured even if the butterfly valve is exposed to high-temperature fluid and is installed in a high radiation environment. A butterfly valve has: a valve body-side valve seat section which is formed on the outer periphery of a valve body; a valve box-side valve seat section which is formed on a valve box; and a valve movement mechanism which, as a valve shaft pivots, moves the valve body in the direction of extension of a flow passage, between a blocking position at which the valve body-side valve seat section and the valve box-side valve seat section are in contact with each other to close a flow passage, and an open position at which the valve body-side valve seat section and the valve box-side valve seat section are separated from each other to open the flow passage. The valve body-side valve seat section is formed from a laminated material comprising a stainless steel plate and a plate-shaped body which consists of expanded graphite.