Valve Seal

Abstract

A device in a valve ( 1 ) comprises a valve housing ( 2 ) with at least a first ( 3 ) and a second ( 4 ) fluid port. A closure element ( 5 ) is arranged in the valve housing ( 2 ), said closure element ( 5 ) having a sealing portion ( 15 ) and comprising a diaphragm ( 30 ). The sealing portion ( 15 ) is movable along an axis of the closure element ( 5 ) by said diaphragm ( 30 ) between an open position and a closed position of at least one of the fluid ports of the valve housing. The closure element ( 5 ) together with the valve housing ( 2 ) forms a flow passage ( 11 ) in the valve housing ( 2 ) which communicates with said fluid ports when the sealing portion ( 15 ) leaves said closed position. A second sealing portion ( 14 ) of the closure element, which is an enclosing portion spaced from said axis, is arranged in contact with a support portion ( 25 ) of the valve housing ( 2 ). An abutment means ( 16 ) is arranged in contact along the periphery of said second sealing portion ( 14 ) in such a manner that said second sealing portion ( 14 ) is arranged between the support portion ( 25 ) and the abutment means ( 16 ). The abutment means ( 16 ) is arranged to transmit a force via said second sealing portion ( 14 ) toward the support portion ( 25 ) to provide a seal. Said force is, at least partly, a force exerted by a spring means arranged in the device.

1 . A valve, comprising:
 a valve housing with at least a first and a second fluid port;   a closure element, arranged in the valve housing, having a first sealing portion and a second sealing portion, the first sealing portion being movable between an open position and a closed position inside the valve housing, and the second sealing portion adapted to come in contact with a seat portion of the valve housing; and   an abutment element adapted to urge a periphery of said second sealing portion toward the seat portion of the valve housing to provide a seal, wherein the abutment element comprises a spring.   
     
     
         2 . The valve of  claim 1 , wherein said abutment element comprises a torsion spring. 
     
     
         3 . The valve of  claim 1 , wherein said abutment element comprises a resilient spring. 
     
     
         4 . The valve of  claim 1 , wherein said abutment element comprises a spring washer. 
     
     
         5 . The valve of  claim 1 , wherein said closure element comprises an opening for accommodating an actuator, said actuator being adapted to move the first sealing portion between said open position and said closed position. 
     
     
         6 . The valve of  claim 5 , wherein said actuator does not move said second sealing portion in a direction parallel to a longitudinal axis of the actuator. 
     
     
         7 . A valve, comprising:
 a valve housing having an inlet and an outlet;   a closure element, arranged inside the valve housing, having a first sealing portion and a second sealing portion,   wherein the first sealing portion is movable from a first position within the valve housing to permit fluid flow between said inlet and said outlet to a second position within the valve housing to prevent fluid flow between said inlet and said outlet, and   wherein the second sealing portion is adapted to maintain a seal between a first portion of said valve housing and a second portion of said valve housing when the first sealing portion is moved from the first position to the second position;   and an abutment element arranged inside said valve housing, wherein said abutment element is adapted to urge said second sealing portion toward a seat of the valve housing to provide a seal.   
     
     
         8 . The valve of  claim 7 , wherein said abutment element comprises a compression spring. 
     
     
         9 . The valve of  claim 8 , wherein said abutment element is tensioned by a compression spring. 
     
     
         10 . The valve of  claim 8 , wherein said abutment element is tensioned by a spring washer.