Abstract: To provide a seal ring capable of suppressing wear of a mating housing and preventing protrusion from an annular groove and thereby being superior in low leak performance, which is an original object of the seal ring. A seal ring 1 formed of resin is attached to an annular groove 12 formed on an outer periphery of a butterfly valve 11 having a substantially disc shape so as to seal an annular gap 14 between the butterfly valve 11 and a housing 13 in which the valve is housed. A part of the seal ring 1 is protruded from the annular groove 12, so that the seal ring 1 adheres to the housing 13 to seal the annular gap 14 due to pressure from sealed fluid. A radial direction thickness t of the ring is set in a range of 7-11% of a ring outer diameter in a free state. A ring inner diameter in a state in which the diameter is enlarged due to pressure from the sealed fluid when the valve is opened, is smaller than an outer diameter r of the valve.

Abstract: To provide a seal ring capable of suppressing wear of a mating housing and preventing protrusion from an annular groove and thereby being superior in low leak performance, which is an original object of the seal ring. A seal ring 1 formed of resin is attached to an annular groove 12 formed on an outer periphery of a butterfly valve 11 having a substantially disc shape so as to seal an annular gap 14 between the butterfly valve 11 and a housing 13 in which the valve is housed. A part of the seal ring 1 is protruded from the annular groove 12, so that the seal ring 1 adheres to the housing 13 to seal the annular gap 14 due to pressure from sealed fluid. A radial direction thickness t of the ring is set in a range of 7-11% of a ring outer diameter in a free state. A ring inner diameter in a state in which the diameter is enlarged due to pressure from the sealed fluid when the valve is opened, is smaller than an outer diameter r of the valve.

Abstract: To provide a manufacturing method for a peeling member in which a non-adhesive resin film formed by fluororesin resin or the like is adhered to a metal plate, the method capable of manufacturing the peeling member which can prevent adhesion of a paper right after fixing for a long period of time with high productivity and without variations in quality. The manufacturing method for the peeling member provided with a peeling sheet 1a formed by a metal plate 2 and a non-adhesive resin film 4 adhered to the metal plate 2, the manufacturing method including a groove forming step of forming a pattern portion 5 formed by a plurality of recessed grooves on at least a part of a paper passing side surface of the non-adhesive resin film 4 along a longitudinal direction of the non-adhesive resin film 4.

Abstract: To provide a manufacturing method for a peeling member in which a non-adhesive resin film formed by fluororesin resin or the like is adhered to a metal plate, the method capable of manufacturing the peeling member which can prevent adhesion of a paper right after fixing for a long period of time with high productivity and without variations in quality.