Ntn Corporation

Yuuki Yamazoe

Kazuo Hirose

Hiroshi Yanagawa

Kohzoh Kakehi

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 ringformed of resin is attached to an annular grooveformed on an outer periphery of a butterfly valvehaving a substantially disc shape so as to seal an annular gapbetween the butterfly valveand a housingin which the valve is housed. A part of the seal ringis protruded from the annular groove, so that the seal ringadheres to the housingto seal the annular gapdue 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.

Seal ring

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 sheetformed by a metal plateand a non-adhesive resin filmadhered to the metal plate, the manufacturing method including a groove forming step of forming a pattern portionformed by a plurality of recessed grooves on at least a part of a paper passing side surface of the non-adhesive resin filmalong a longitudinal direction of the non-adhesive resin film

Growing community of inventors

Mie, Japan

Yuuki Yamazoe