Slide gate valve for powder and granular material

A slidable gate valve for powder and granular material, comprising:

• a frame body with an opening;
• an actuator attached to said frame body;
• a holder case connected to said frame body;
• a gate plate that is slid by said actuator in a direction perpendicular to a moving path of the powder and granular material, so as to open and close the opening;
• a sealing member that comprises a packing pressed into a seal housing attached to a through hole formed in a specific area of said frame body on a side of said holder case and seals said gate plate from said frame body, so as to prevent leakage of the powder and granular material out of the moving path;
• and
• a support member that supports said gate plate,
• wherein said actuator is an air cylinder, and
• exhaust of said air cylinder is induced into said seal housing.

A slidable gate valve for powder and granular material, comprising:

• a frame body with an opening;
• an actuator attached to said frame body;
• a holder case connected to said frame body;
• a gate plate that is slid by said actuator in a direction perpendicular to a moving path of the powder and granular material, so as to open and close the opening;
• a first sealing member that is attached to a specific area of said frame body on a side of said holder case and seals said gate plate from said frame body, so as to prevent leakage of the powder and granular material out of the moving path;
• a support member that supports said gate plate;
• and
• a second sealing member that seals a clearance between said frame body and said gate plate in the closed state of the opening with said gate plate,
• wherein a certain area of said second sealing member, which is in contact with said gate plate, forms a labyrinth seal structure to prevent leakage of the powder and granular material in the moving path.