Provided is a tandem cone valve capable of avoiding or reducing resistance on a valve switch caused by fluid pressure in a pipeline in the opening or closing stage. The cone valve includes valve rods, valve cores and a valve body. The valve cores include a first valve core and a second valve core. The first valve core and the second valve core are coaxially arranged in a valve core cavity. The outer walls of the valve cores are in the shape of cones; the first valve core and the second valve core are stacked one on the other, the first valve core is provided with a first valve core first flow hole and a first valve core second flow hole which penetrate through the inner wall and the outer wall of the first valve core, and the valve core cavity is provided with a valve core cavity flow hole corresponding to the first valve core first flow hole and the first valve core second flow hole. The cone valve is provided with the second valve core stacked coaxially on the base of the first valve core, and the second valve rod driving the second valve core to rotate is arranged in the first valve rod in a sleeved manner, thus the valve is simple and compact in structure; and the two levels of valve cores can each rotate to open/close the valve level by level, thus reducing momentary resistance when opening and closing a large cone valve.

Provided is a tandem cone valve capable of avoiding or reducing resistance on a valve switch caused by fluid pressure in a pipeline in the opening or closing stage. The cone valve includes valve rods, valve cores and a valve body. The valve cores include a first valve core and a second valve core. The first valve core and the second valve core are coaxially arranged in a valve core cavity. The outer walls of the valve cores are in the shape of cones; the first valve core and the second valve core are stacked one on the other, the first valve core is provided with a first valve core first flow hole and a first valve core second flow hole which penetrate through the inner wall and the outer wall of the first valve core, and the valve core cavity is provided with a valve core cavity flow hole corresponding to the first valve core first flow hole and the first valve core second flow hole. The cone valve is provided with the second valve core stacked coaxially on the base of the first valve core, and the second valve rod driving the second valve core to rotate is arranged in the first valve rod in a sleeved manner, thus the valve is simple and compact in structure; and the two levels of valve cores can each rotate to open/close the valve level by level, thus reducing momentary resistance when opening and closing a large cone valve.

The invention relates to a valve having an inlet and an outlet, and a closure member. The closure member comprises an inlet area with a plurality of inlet openings and an outlet area. Main flow channels extend from initial openings in the inlet area through the closure member to openings in the outlet area, said initial openings are located in an initial flow inlet area of the inlet area which is first subjected to fluid from the inlet of the valve when the closure member is rotated from a fully closed position towards an initially open position.

A control valve for controlling a fluid flow is disclosed, in particular a coolant flow in a coolant circuit of an internal combustion engine, including a valve element which is provided with at least one opening, and which can move relative to a valve housing. With a movement of the valve element, the at least one opening can be brought into a position in which it overlaps a line cross-section defined on the valve housing side, in order to permit a flow of fluid. In addition, a sealing element is provided which is accommodated on the valve housing such that it radially surrounds the line cross-section, and a sealing surface of which can be brought into contact with a surface of the valve element, thus bridging a gap that extends between the surface of the valve element and the valve housing in a region of the sealing element. In order to provide a control valve that has minimal friction losses over the working range thereof, the extent of the gap changes according to the movement of the valve element in relation to the valve housing. In addition, the extent of the gap reaches a maximum in a region in which the at least one opening overlaps the line cross-section, at which extent the sealing element with its sealing surface is raised from the surface of the valve element.

A control valve for controlling a fluid flow is disclosed, in particular a coolant flow in a coolant circuit of an internal combustion engine, including a valve element which is provided with at least one opening, and which can move relative to a valve housing. With a movement of the valve element, the at least one opening can be brought into a position in which it overlaps a line cross-section defined on the valve housing side, in order to permit a flow of fluid. In addition, a sealing element is provided which is accommodated on the valve housing such that it radially surrounds the line cross-section, and a sealing surface of which can be brought into contact with a surface of the valve element, thus bridging a gap that extends between the surface of the valve element and the valve housing in a region of the sealing element. In order to provide a control valve that has minimal friction losses over the working range thereof, the extent of the gap changes according to the movement of the valve element in relation to the valve housing. In addition, the extent of the gap reaches a maximum in a region in which the at least one opening overlaps the line cross-section, at which extent the sealing element with its sealing surface is raised from the surface of the valve element.

Provided is a tandem cone valve capable of avoiding or reducing resistance on a valve switch caused by fluid pressure in a pipeline in the opening or closing stage. The cone valve includes valve rods, valve cores and a valve body. The valve cores include a first valve core and a second valve core. The first valve core and the second valve core are coaxially arranged in a valve core cavity. The outer walls of the valve cores are in the shape of cones; the first valve core and the second valve core are stacked one on the other, the first valve core is provided with a first valve core first flow hole and a first valve core second flow hole which penetrate through the inner wall and the outer wall of the first valve core, and the valve core cavity is provided with a valve core cavity flow hole corresponding to the first valve core first flow hole and the first valve core second flow hole. The cone valve is provided with the second valve core stacked coaxially on the base of the first valve core, and the second valve rod driving the second valve core to rotate is arranged in the first valve rod in a sleeved manner, thus the valve is simple and compact in structure; and the two levels of valve cores can each rotate to open/close the valve level by level, thus reducing momentary resistance when opening and closing a large cone valve.

A ball valve positioned between a first line and a second line includes a housing and a ball disposed a ball disposed within the housing. The ball includes a bore and is configured to rotate between an open position and a closed position. The ball valve also includes an annular seat disposed between the housing and the ball. The annular seat includes a first annular sealing ring extending circumferentially about a radially-outer surface of the annular seat and an axially-extending passageway extending through the annular seat to enable fluid flow from a valve cavity to an annular space between the annular seat and the housing. The first annular sealing ring, the axially-extending passageway, and the annular space facilitate movement of the annular seat away from the ball as the ball rotates from the closed position toward the open position.

The invention relates to a control valve for controlling a fluid flow, in particular a coolant flow in a coolant circuit of an internal combustion engine, including a valve element which is provided with at least one opening, and which can move relative to a valve housing. With a movement of the valve element, the at least one opening can be brought into a position in which it overlaps a line cross-section defined on the valve housing side, in order to permit a flow of fluid. In addition, a sealing element is provided which is accommodated on the valve housing such that it radially surrounds the line cross-section, and a sealing surface of which can be brought into contact with a surface of the valve element, thus bridging a gap that extends between the surface of the valve element and the valve housing in a region of the sealing element. In order to provide a control valve that has minimal friction losses over the working range thereof, the extent of the gap changes according to the movement of the valve element in relation to the valve housing. In addition, the extent of the gap reaches a maximum in a region in which the at least one opening overlaps the line cross-section, at which extent the sealing element with its sealing surface is raised from the surface of the valve element.

The invention relates to a control valve for controlling a fluid flow, in particular a coolant flow in a coolant circuit of an internal combustion engine, including a valve element which is provided with at least one opening, and which can move relative to a valve housing. With a movement of the valve element, the at least one opening can be brought into a position in which it overlaps a line cross-section defined on the valve housing side, in order to permit a flow of fluid. In addition, a sealing element is provided which is accommodated on the valve housing such that it radially surrounds the line cross-section, and a sealing surface of which can be brought into contact with a surface of the valve element, thus bridging a gap that extends between the surface of the valve element and the valve housing in a region of the sealing element. In order to provide a control valve that has minimal friction losses over the working range thereof, the extent of the gap changes according to the movement of the valve element in relation to the valve housing. In addition, the extent of the gap reaches a maximum in a region in which the at least one opening overlaps the line cross-section, at which extent the sealing element with its sealing surface is raised from the surface of the valve element.

An operating valve includes a valve chamber which is formed in a main body having a passage, a valve body which is housed in the valve chamber and has a passage corresponding to the passage of the main body, a rotary shaft which is detachably connected to the valve body, an operating member which operates a rotation of the rotary shaft, and a bias member which biases the rotary shaft to a position of the valve body.