SEALING DEVICE USED FOR STEAM STERILIZING DEVICE AND THE LIKE

摘要

PURPOSE: To provide a device for ensuring sealing in any case as varying inner pressure of a treating tank from pressure side through vacuum side like an steam type steriliging device. CONSTITUTION: A gasket 1 provided with a lip periphery part 4 having a chevron shape inner wall surface 3 on an opposite surface of a seal surface 2 brought into contact with a cover flange 11 is fit with a seal part 7 which has a groove of a chevron shape wall surface 8 conforming to the lip periphery part 4 of the chevlon shape inner wall surface 3 and in which an air hole 9 is penetrated through a chevlon shape central part. Sealing is performed by introducing compressed air 10 from the air hole 9 and bringing the seal surface 2 of the gasket 1 into close contact with the cover flange 11 when the inner pressure of a treating tank is on the pressure side and sealing is performed by opening the air hole 9 into atmospheric pressure and by compressed reaction of the gasket 1 caused by pressure of the cover flange 11 and fixing of the chevlon shape wall surface 8 at bottom of the seal part 7 when the inner pressure of the treating tank is on the vacuum side.