The disclosure relates to a valve assembly 10 for controlling a volute connecting opening 324 of a multi-channel turbine 500. The valve assembly 10 comprises a housing portion 300, a valve body 100 and an internal lever 200. The housing portion 300 defines a first volute channel 312, a second volute channel 314 and a volute connecting region 320. The housing portion 300 further comprises a cavity 340. The cavity 340 is separated from the volutes 312, 314 and can be accessed from outside the housing portion 300 via a housing opening 342 which extends from outside the housing portion 300 into the cavity 340. The volute connection region 320 is located between the first volute channel 312 and the second volute channel 314 and defines a volute connecting opening 324. The valve body 100 is inserted in the cavity 340 of the housing portion 300 and comprises at least one fin 120. The internal lever 200 is coupled with the valve body 100 and configured to pivotably move the valve body 100 between a first position and a second position. In the first position of the valve body 100, the fin 120 blocks the volute connecting opening 324.

In a double eccentric valve, a valve seat or valve body includes a rubber seal part in which a seat surface or seal surface is formed. An interference between the valve seat and the valve body is made minimum at a position of a rotary-shaft-directional end of the valve body in the radial direction of the valve body which is parallel to an extending direction of the axis of a rotary shaft.

In a double eccentric valve, a valve seat or valve body includes a rubber seal part in which a seat surface or seal surface is formed. An interference between the valve seat and the valve body is made minimum at a position of a rotary-shaft-directional end of the valve body in the radial direction of the valve body which is parallel to an extending direction of the axis of a rotary shaft.

A scupper valve includes a frame and a rigid flapper coupled to the frame. The rigid flapper is configured to swing relative to the rigid frame between an open and closed position. A flexible annular seal defines a centrally-disposed circular opening and a first annular projection that surrounds the centrally-disposed opening. The rigid flapper, in the closed position, contacts a distal edge of the first annular projection to create a circular line contact that restricts or prevents fluid flow through the centrally-disposed circular opening in the flexible annular seal. A rigid annular backplate is adjacent to and in direct physical contact with an annular surface of the flexible seal on a side of the flexible seal opposite the rigid flapper.

In a double eccentric valve, a valve seat or valve body includes a rubber seal part in which a seat surface or seal surface is formed. An interference between the valve seat and the valve body is made minimum at a position of a rotary-shaft-directional end of the valve body in the radial direction of the valve body which is parallel to an extending direction of the axis of a rotary shaft.

A method of manufacturing a valve with a corrosion-resistant barrier includes providing a valve body defining a first end, a second end, and a body bore extending from the first end to the second end, the valve body further defining a channel co-annular with the body bore, the channel comprising an outer edge defining a seat retention groove; and thermal spraying a corrosion-resistant barrier over the seat retention groove, the corrosion-resistant barrier defining a first edge and a second edge, the first edge oriented between the seat retention groove and the first end of the valve body, and the second edge oriented between the seat retention groove and the second end of the valve body.

A method of manufacturing a valve with a corrosion-resistant barrier includes providing a valve body defining a first end, a second end, and a body bore extending from the first end to the second end, the valve body further defining a channel co-annular with the body bore, the channel comprising an outer edge defining a seat retention groove; and thermal spraying a corrosion-resistant barrier over the seat retention groove, the corrosion-resistant barrier defining a first edge and a second edge, the first edge oriented between the seat retention groove and the first end of the valve body, and the second edge oriented between the seat retention groove and the second end of the valve body.

The invention relates to a valve assembly (100) for a multi-scroll turbine (10) for controlling an overflow of exhaust gases between a first spiral (36) and a second spiral (38) and for controlling a bypass opening (50). The valve assembly 100 comprises a lever (110) and a valve closing element (120) which is operatively connected to the lever (110). Furthermore, the valve assembly (100) comprises a spring element (130) which is designed to pre-bias the valve closing element (120) the against lever (110).

Example aspects of a valve are disclosed. The valve can comprise a valve body defining a first end, a second end opposite the first end, an inner surface, and an outer surface, the inner surface defining a body bore extending from the first end to the second end and a channel extending radially outward from the body bore, the channel defining a seat retention groove; a metal barrier applied to the inner surface and covering the seat retention groove, the metal barrier defining a first edge and a second edge, the first edge oriented between the seat retention groove and the first end, and the second edge oriented between the seat retention groove and the second end; and a valve seat positioned within the channel.

A scupper valve includes a frame and a rigid flapper coupled to the frame. The rigid flapper is configured to swing relative to the rigid frame between an open and closed position. A flexible annular seal defines a centrally-disposed circular opening and a first annular projection that surrounds the centrally-disposed opening. The rigid flapper, in the closed position, contacts a distal edge of the first annular projection to create a circular line contact that restricts or prevents fluid flow through the centrally-disposed circular opening in the flexible annular seal. A rigid annular backplate is adjacent to and in direct physical contact with an annular surface of the flexible seal on a side of the flexible seal opposite the rigid flapper.