Sealing System for Joints

Abstract

A gasket and seat system for sealing a joint is disclosed. The gasket comprises, for example, an inner portion with a wall facing an interior of the coupling and an outer portion, which extends axially forming radial end walls. The inner portion of the gasket is formed with an angled wall, making the inner portion expand inwards, which angled wall interacts with a matching angled wall of the seat, such that the joint has provisions for increasing the sealing ability in cases with increased pressure in the coupling. The gasket may further have the wall facing the interior being adapted to be flush with an interior surface when mounted in the seat and may also have provisions for heat expansion and elevated pressures, in order to remain flush with the coupling at elevated temperatures and in order to ensure sealing at elevated pressures.

What is claimed is: 
     
         1 . A gasket and seat system suitable for sealing a joint, wherein the gasket is made of a polymeric material, said gasket comprising:
 an inner portion having a wall forming an inner diameter of the gasket, the wall in contact with an interior and high pressure side of the joint, and   an outer portion, arranged radially outside said inner portion, and said outer portion extends axially forming radial end walls,   wherein the gasket is formed with a groove in the outer portion between said radial end walls, wherein said radial end walls are compressible towards the groove for fitting into said seat.   
     
     
         2 . The gasket and seat system according to  claim 1 , wherein the wall facing the interior of the joint is adapted to be flush with an interior surface of the joint when mounted in the seat. 
     
     
         3 . The gasket and seat system according to  claim 1 , wherein the wall is angled slightly inwards from a common point of engagement for an interior surface. 
     
     
         4 . The gasket and seat system according to  claim 1 , wherein the inner portion of the gasket is formed with an angled wall connected at the wall and at one of the radial end walls so that the wall and angled wall are contiguous surfaces forming an angle, whereby the inner portion increases in breadth from the outer portion to the wall in contact with the interior and high pressure side along the angled wall, wherein the angled wall parallels a matching angled wall of the seat. 
     
     
         5 . The gasket and seat system according to  claim 1 , wherein the gasket is formed with angled walls of the outer portion which are compressed upon entry in the seat. 
     
     
         6 . The gasket and seat system according to  claim 1 , wherein a gasket surface facing a flange plane is adapted to be flush with the flange plane after assembly. 
     
     
         7 . The gasket and seat system according to  claim 1 , wherein the gasket comprises silver ions, in order to obtain antiseptic properties. 
     
     
         8 . The gasket and seat system according to  claim 1 , wherein said joint is a pipe coupling. 
     
     
         9 . The gasket and seat system according to  claim 8 , wherein said pipe coupling comprises two flanges, wherein the gasket is located in one of said flanges only, preferably pre-mounted in said one flange during assembly of said system. 
     
     
         10 . The gasket and seat system according to  claim 1 , wherein said joint is installed in a pump housing of a pump for food processing or pharmaceutical product processing. 
     
     
         11 . A gasket of polymeric material adapted to seal a joint, said gasket comprising:
 an inner portion with a wall forming an inner diameter of the gasket, wherein the wall is in contact with an interior and a high pressure side of said joint when in use, and   an outer portion, which extends axially forming radial end walls, wherein the inner portion of the gasket is formed with an angled wall connected at the wall and at one of the radial end walls such that the wall and the angled wall are contiguous surfaces forming an angle, whereby the inner portion increases in breadth from the outer portion to the wall in contact with the high pressure side.   
     
     
         12 . A gasket of polymeric material adapted to seal a joint, said gasket comprising
 an inner portion, with a wall forming an inner diameter of the gasket, wherein the wall is in contact with an interior and a high pressure side of said joint when in use, and   an outer portion, which extends axially forming radial end walls, and wherein the outer portion comprises a groove between the radial end walls, wherein said radial end walls are compressible towards the groove for fitting into a seat.