The present application discloses a valve comprising: a housing; at least one valve body disposed in the housing, the at least one valve body being rotatable in the housing; and at least one sealing element provided between the housing and the at least one valve body; at least one lifting structure configured to move the at least one sealing element upward and downward relative to the housing or the at least one valve body to adjust the relative distance between the at least one sealing element and the housing/the at least one valve body; wherein when the at least one valve body rotates, the at least one sealing element at least partially leaves the housing or the at least one valve body, so that the driving force required to rotate the valve body can be reduced.

A double eccentric valve: a valve seat; a rotary shaft; a valve gear with a rotary shaft base end portion; a motor rotating the shaft via a valve gear; bearings supporting the shaft in a cantilever manner; a return spring giving, to the valve gear, spring force for rotating the shaft in a valve body closing direction; and a full-close stopper to restrict valve gear rotation with the shaft when the valve body is fully closed. When the motor is not driven, the valve gear partially contacts the full-close stopper by spring force, moment acting on the valve gear is caused to act on the rotary shaft with the contact point serving as a fulcrum, the rotary shaft is tilted toward the valve seat with the contact point between the rotary shaft and the bearing serving as a fulcrum, and thus, the valve body is pressed against the valve seat.

Disclosed is a valve, comprising a valve body, an inner valve seat and a valve core. The valve core is mounted in the valve body. The inner valve seat is mounted in the valve body. The inner valve seat has a annular body and a seal structure extending inwards from an inner peripheral surface of the annular body, wherein the seal structure is arranged in such a manner that the seal structure seals a gap formed among the valve body, the inner valve seat and the valve core when the valve is in a closed state. After the valve is used for discharging liquid, the amount of liquid residue inside the valve can be greatly reduced.

A valve system comprising a valve body having an opening and an interior; a davit system comprising: a first pillar having an upper end and a lower end, wherein the lower end of the first pillar is attached to the valve body; a second pillar having an upper end and a lower end, wherein the lower end of the second pillar is attached to the valve body; a pivot arm having a first end and a second end, wherein the first end of the pivot arm is rotationally attached to the upper end of the first pillar, the second end of the pivot arm is removably attached to the upper end of the second pillar and the pivot arm straddles the valve body opening when the second end of the pivot arm touches the upper end of the second pillar; and a closure cap system comprising a closure cap, wherein a means for sealing the closure cap is disposed between the closure cap and the valve body; and a cap stem having an upper end and a lower end, wherein the lower end of the cap stem is attached to the closure cap and the upper end of the cap stem is disposed through a central portion of the pivot arm; and wherein a means for lifting and lowering the closure cap engages the cap stem to lift or lower the closure cap is disclosed. A method of using the valve system is also disclosed.

A valve system comprising a valve body having an opening and an interior; a davit system comprising: a first pillar having an upper end and a lower end, wherein the lower end of the first pillar is attached to the valve body; a second pillar having an upper end and a lower end, wherein the lower end of the second pillar is attached to the valve body; a pivot arm having a first end and a second end, wherein the first end of the pivot arm is rotationally attached to the upper end of the first pillar, the second end of the pivot arm is removably attached to the upper end of the second pillar and the pivot arm straddles the valve body opening when the second end of the pivot arm touches the upper end of the second pillar; and a closure cap system comprising a closure cap, wherein a means for sealing the closure cap is disposed between the closure cap and the valve body; and a cap stem having an upper end and a lower end, wherein the lower end of the cap stem is attached to the closure cap and the upper end of the cap stem is disposed through a central portion of the pivot arm; and wherein a means for lifting and lowering the closure cap engages the cap stem to lift or lower the closure cap is disclosed. A method of using the valve system is also disclosed.

An erosion prevention structure for a sealing surface of a valve includes a valve body, a valve seat, a valve core, a valve sleeve and a valve rod. A valve seat mounting hole is provided in the valve body and located between a medium outlet and a cavity; the valve seat is arranged in the valve seat mounting hole; the top surface of the valve seat is provided with an annular table; the outside surface of the annular table is a sealing surface A, wherein an included angle is formed between the sealing surface A and a horizontal surface; an annular flange is arranged at the bottom of the valve core and located at the outer side of the valve core; the inside surface of the annular flange is a sealing surface B, wherein an included angle is formed between the sealing surface B and a horizontal surface.

An erosion prevention structure for a sealing surface of a valve includes a valve body, a valve seat, a valve core, a valve sleeve and a valve rod. A valve seat mounting hole is provided in the valve body and located between a medium outlet and a cavity; the valve seat is arranged in the valve seat mounting hole; the top surface of the valve seat is provided with an annular table; the outside surface of the annular table is a sealing surface A, wherein an included angle is formed between the sealing surface A and a horizontal surface; an annular flange is arranged at the bottom of the valve core and located at the outer side of the valve core; the inside surface of the annular flange is a sealing surface B, wherein an included angle is formed between the sealing surface B and a horizontal surface.

A valve includes a valve body having a fluid flow path extending therethrough, a valve seat located in the valve body, and a valve disc located in the fluid flow path of the valve body. The disc is rotatable between a fully open position and an intermediate position about an axis substantially perpendicular to a longitudinal axis of the disc. The disc is also translatable between the intermediate position and a fully closed position in a direction substantially parallel to the longitudinal axis of the disc. Such a valve may be incorporated into a fluid line of a fluid system.

The invention relates to a valve (10) for regulating oxygen in a fuel cell system (11), comprising: a valve housing (12), which has a valve seat (13) and a through-opening (14) in the valve seat (13); a valve shaft (15), which has a valve disk (16) formed thereon for closing the through-opening (14) in the valve seat (13) in a closed state of the valve (10) and for releasing the through-opening (14) in a released state of the valve (10); and a moving means (17) for linearly moving the valve disk (16) between an opening position in an open state, in which open state the valve disk (16) is spaced apart from the valve seat (13), and a closing position in the closed state, in which closed state the valve disk (16) is positioned on the valve seat (13), and for rotationally moving the valve shaft (15) in order to pivot the valve disk (16) between the opening position and a releasing position in the released state, in which released state at least part of the valve disk (16) is spaced farther apart from the valve seat (13) than in the opening position. The invention also relates to a fuel cell system (11) comprising at least one valve (10) according to the invention.

The invention relates to a valve (10) for regulating oxygen in a fuel cell system (11), comprising: a valve housing (12), which has a valve seat (13) and a through-opening (14) in the valve seat (13); a valve shaft (15), which has a valve disk (16) formed thereon for closing the through-opening (14) in the valve seat (13) in a closed state of the valve (10) and for releasing the through-opening (14) in a released state of the valve (10); and a moving means (17) for linearly moving the valve disk (16) between an opening position in an open state, in which open state the valve disk (16) is spaced apart from the valve seat (13), and a closing position in the closed state, in which closed state the valve disk (16) is positioned on the valve seat (13), and for rotationally moving the valve shaft (15) in order to pivot the valve disk (16) between the opening position and a releasing position in the released state, in which released state at least part of the valve disk (16) is spaced farther apart from the valve seat (13) than in the opening position. The invention also relates to a fuel cell system (11) comprising at least one valve (10) according to the invention.