Nippon Pillar Packing Co., Ltd.

Hiroyuki Sasakura

Takahisa Ueda

Takeshi Miyoshi

Takashi Ikeda

Masao Konaka

Yoshinari Kobuchi

By improving a metal gasket having a corrugated portion which is advantageous in sealing property, a non-asbestos gasket in which the sealing property is further improved is provided. A non-asbestos gasket has a three-layer structured sealing portion S configured by: a core layerA which is made of a plate of a metal, and which is formed into a concentric circle-like corrugated shape; and surface layerswhich are made of expanded graphite, and which are stacked on the front and back faces of the core layer, respectively. In an outer circumferential end of the sealing portion S, the core layerA is protruded from the front and back surface layerstoward an outer diameter side. In an inner circumferential end of the sealing portion S, the front and back surface layersare protruded from the core layerA toward an inner diameter side, thereby covering the core layerA.

Non-asbestos gasket

A structure of a gland packing box is enhanced in the lubricating function and cooling function of the seal part, by forming at least one disclocating part for partly dislocating in the axial direction a gland packing of the gland packing box. The dislocating part is located on the fitting face of a gland packing holding member for fitting in the axial direction the gland packing externally mounted on a rotary shaft in the packing box. The dislocation causes part of the annular gap formed between the inside of the gland packing holding member and the outside of the rotary shaft to overlap with the internal surface of the gland packing in the circumferential direction, and forces a fluid to be sent into the inner surface of the overlapping gland packing along with rotation of the rotary shaft.

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Osaka, Japan

Hiroyuki Sasakura