Slide gate valve for powder and granular material
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United States of America Patent
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Nov 16, 2004
Grant Date -
Aug 21, 2003
app pub date -
Aug 23, 2002
filing date -
Feb 23, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A sealing member includes a gland packing pressed into a wide, flat, ring-shaped seal housing to seal a sliding portion of a gate plate. The seal housing has a bamboo shoot-like shape or a bevel-like shape structure in front and cross sectional view and includes wide ring-shaped or oval shaped steps and a rear step. An inner wall of the seal housing has an included face that abruptly rises to be oriented almost perpendicular to the axis of the gate plate, in the sliding direction, a ring-shaped face that is extended from the included face to be oriented almost parallel to the axis, the step that is extended from the ring-shaped face, a ring-shaped face that is similar to the ring-shaped face and is extended from the step, the step that is extended from the ring-shaped face, a ring-shaped face that is similar to the ring-shaped face and is extended from the step, and an opening end that is extended from the ring-shaped face.
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