A static mixer may include a housing having an inlet and an outlet. The static mixer may also include a mixing element arranged within the housing. The mixing element may include a plurality of blade disk pairs arranged in crisscrossing fashion, each blade disk, of the pairs of blade disks, comprising a plurality of parallel extending and spaced apart blades. In some examples, a blade disk may include a link connecting the end of each of the plurality of parallel extending and spaced apart blades. In some examples, the link may be a ring base. In other examples, the link may be a propped tie. Alternatively or additionally, a support perch may be provided for supporting a ring base of an adjoining module.

A method for controlling fluid ratio accuracy during a dual flow injection with a powered injection system is described. The method includes predicting a first capacitance volume of a first syringe comprising a first medical fluid and a second capacitance volume of a second syringe comprising a second medical fluid with a first capacitance correction factor and a second capacitance correction factor, respectively, selecting a ratio of the first medical fluid and the second medical fluid to be administered to a patient in the dual flow injection, determining a relative acceleration ratio of a first piston of the first syringe and a second piston of a second syringe based on the predicted first capacitance volume and the predicted second capacitance volume, wherein the relative acceleration ratio is selected to maintain the selected ratio of the first medical fluid and the second medical fluid during the dual flow injection, and injecting a mixture of a first medical fluid and a second medical fluid having the selected ratio with the powered injection system.

This mixing member is provided with a base portion disposed in the exhaust pipe, separated from an inner wall thereof, and a plurality of blade portions which extend from the base portion toward the inner wall, and which generate a swirling flow of the exhaust gas on a downstream side, in the exhaust direction, of the mixing member, wherein: the blade portions are disposed inclined with respect to the exhaust direction such that the position of a connecting portion with the base portion is at a most downstream position thereof, in the exhaust direction; and the base portion includes a reducing agent passage which penetrates through both end surfaces thereof in the exhaust direction, and which allows the reducing agent to pass through from an upstream side to a downstream side of the mixing member in the exhaust direction.

A flow control device comprising a body having an inlet in a first end thereof, an outlet in a second end thereof, and a passageway extending between the inlet and the outlet, the flow control device further comprising an injection assembly located at least partially within the passageway such that at least a portion of a fluid flowing through the device passes through the injection assembly, and wherein the flow control device further comprises a flow control portion adapted to control the proportion of the fluid that passes through the injection assembly in response to one or more parameters.

A static mixer may include a housing having an inlet and an outlet. The static mixer may also include a mixing element arranged within the housing. The mixing element may include a plurality of blade disk pairs arranged in crisscrossing fashion, each blade disk, of the pairs of blade disks, comprising a plurality of parallel extending and spaced apart blades.

A static mixer includes a tubular body having a sidewall with an upstream end, a downstream end opposite the upstream end, and an inner surface. The upstream end has a surface defining an upstream opening into the body. The downstream end has a surface defining a downstream opening exiting the body. The upstream opening, the downstream opening, and inner surface define a passageway through the body for transport of a first fluid therethrough. A primary fin may depend from the inner surface of the body and into the passageway. The primary fin may have a curved fin with a flow surface. A secondary fin may extend into the passageway adjacent to the primary fin, the secondary fin may have a curved flow surface that curves opposite to the flow surface of the primary fin. The secondary fin may be offset upstream or downstream from the primary fin.

A device to be installed in a pipeline, characterized by at least one static mixer and at least one pre-mixer arranged in a sleeve, wherein said at least one static mixer is characterized by: a body having a plurality of slots through the body, said slots having one or more sides that are angled with respect to an axis passing through a center of the body; a plurality of arms extending from an outer edge of the body towards a center of the body, wherein the plurality of slots comprising at least one concentric ring of slots.

A static mixer includes a tubular body having a sidewall with an upstream end, a downstream end opposite the upstream end, and an inner surface. The upstream end has a surface defining an upstream opening into the body. The downstream end has a surface defining a downstream opening exiting the body. The upstream opening, the downstream opening, and inner surface define a passageway through the body for transport of a first fluid therethrough. A primary fin may depend from the inner surface of the body and into the passageway. The primary fin may have a curved fin with a flow surface. A secondary fin may extend into the passageway adjacent to the primary fin, the secondary fin may have a curved flow surface that curves opposite to the flow surface of the primary fin. The secondary fin may be offset upstream or downstream from the primary fin.

A static mixer includes a tubular body having a sidewall with an upstream end, a downstream end opposite the upstream end, and an inner surface. The upstream end has a surface defining an upstream opening into the body. The downstream end has a surface defining a downstream opening exiting the body. The upstream opening, the downstream opening, and inner surface define a passageway through the body for transport of a first fluid therethrough. A primary fin may depend from the inner surface of the body and into the passageway. The primary fin may have a curved fin with a flow surface. A secondary fin may extend into the passageway adjacent to the primary fin, the secondary fin may have a curved flow surface that curves opposite to the flow surface of the primary fin. The secondary fin may be offset upstream or downstream from the primary fin.

A method of mixing fluid flowing in a raceway channel is provided which includes directing the fluid to flow over a ramp which extends across the raceway channel. The ramp has a leading surface which is inclined at between about 5 and 45 upwardly to a top edge, and a trailing surface which extends vertically downwardly from the top edge. The height of the ramp is selected so that the top edge is lower than the level of the fluid in the raceway channel.