Balanced fluid valve

Abstract

It is proposed to design a fluid flux regulating unit ( 1, 28, 35, 41, 53, 56, 58 ), comprising a first fluid port ( 3 ), a second fluid port ( 4 ) and a valve means ( 6 ) , in a way that the valve means ( 6 ) comprises at least one fluid pressure balancing means ( 13, 25, 30, 31, 33, 52 ).

1 . A fluid flux regulating unit, comprising a first fluid port, a second fluid port and a valve means, wherein said valve means comprises at least one fluid pressure balancing means. 
     
     
         2 . The fluid flux regulating unit as claimed in  claim 1 , wherein said valve means comprises at least one movable valve part, wherein preferably said movable valve part comprises at least one of said fluid pressure balancing means. 
     
     
         3 . The fluid flux regulating unit as claimed in  claim 1 , wherein said valve means comprises an axially movable tubular unit, wherein preferable said tubular unit comprises an inner passage. 
     
     
         4 . The fluid flux regulating unit as claimed in  claim 1 , wherein said fluid pressure balancing means is designed and arranged in a way that at least part of the surface parts, being in fluid communication with said first fluid port and having a surface normal at least partially in parallel to the moving direction (A) of said movable valve part, are fluid pressure balanced. 
     
     
         5 . The fluid flux regulating unit as claimed in  claim 1 , wherein said fluid pressure balancing means is at least in part designed and arranged in a way that for each surface part, being in fluid communication with said first fluid port, a fluid pressure balancing surface is provided, being also in fluid communication with said first fluid port, wherein the fraction of the force, generated by the fluid pressure on the first fluid port side and pointing in a direction parallel to the moving direction (A) of said movable valve part, are opposing each other. 
     
     
         6 . The fluid flux regulating unit as claimed in  claim 1 , wherein said fluid pressure balancing means is at least in part designed and arranged in a way that said movable valve part essentially shows no surface parts, being in fluid communication with said first fluid port and having a surface normal at least partially in parallel to the moving direction (A) of said movable valve part. 
     
     
         7 . The fluid flux regulating unit as claimed in  claim 6 , wherein said movable valve part comprises tapered surfaces on surface parts, particularly on surface parts, being in fluid communication with said second fluid port. 
     
     
         8 . The fluid flux regulating unit as claimed in  claim 7 , wherein said movable valve part shows balanced surfaces on surface parts, which are in fluid communication with said second fluid port. 
     
     
         9 . The fluid flux regulating unit as claimed in  claim 1 , wherein said fluid flux regulating unit is designed and arranged as a fluid pressure regulator. 
     
     
         10 . The fluid flux regulating unit as claimed in  claim 1 , wherein said fluid flux regulating unit is designed and arranged as a an actuated valve. 
     
     
         11 . The fluid flux regulating unit as claimed in  claim 10 , wherein pilot pressure applying means are provided, which preferably can be selectively connected to said first fluid port and/or said second fluid port. 
     
     
         12 . The fluid flux regulating unit as claimed in  claim 11 , wherein said pilot pressure applying means can be connected to a respective fluid pressure reservoir via a fluid throughput reducing means. 
     
     
         13 . The fluid flux regulating unit as claimed in  claim 1 , wherein at least one valve closing biasing means is provided, which preferably biases said movable valve part in the direction of a closing position. 
     
     
         14 . The fluid flux regulating unit as claimed in  claim 1 , comprising at least a third fluid port. 
     
     
         15 . The fluid flux regulating unit according to  claim 1 , wherein said valve means is at least in part influenced by the fluid, which is controlled by the fluid flux regulating unit.