The invention relates to a method for producing a central housing part (1) of a high-pressure slide gate valve from high-temperature steel, in the case of which two die-forged central-housing-part half-shells (1a, 1b) with forged-on connectors (4a, 4b) are welded to one another, using electron-beam welding without any welding filler material, by a butt weld seam (2), which runs in a plane (3) which runs transversely to the connectors (4a, 4b) and subdivides the central housing part (1). In order to increase the creep resistance, and to reduce the weight, of such a central housing part, the production costs at the same time being advantageous, the invention proposes that the wall thicknesses of the central-housing-part half-shells (1a, 1b) should be designed overall on the basis of a weld strength factor (WSF=1), and that, once the weld seam (2) has been produced, the entire central housing part (1) should be subjected to a rigorous heat treatment involving heating to beyond the transformation temperature, quenching and tempering.

A valve core comprises a columnar body with a first water passage hole, a buffer groove being disposed on the body and located at an outside of the first water passage hole; a sealing block matched with the buffer groove and being disposed inside the buffer groove; wherein a partitioning portion is disposed between the buffer groove and the first water passage hole, a connection hole is disposed in the partitioning portion capable of communicating the buffer groove with the first water passage hole. through the provision of the partitioning portion, avoids the direct impact of the water flow on the sealing block, and eliminates the unstable factors caused by water flow on the sealing block, so that the sealing block is pressed tightly on an inner wall of a valve body.

A valve core comprises a columnar body with a first water passage hole, a buffer groove being disposed on the body and located at an outside of the first water passage hole; a sealing block matched with the buffer groove and being disposed inside the buffer groove; wherein a partitioning portion is disposed between the buffer groove and the first water passage hole, a connection hole is disposed in the partitioning portion capable of communicating the buffer groove with the first water passage hole. through the provision of the partitioning portion, avoids the direct impact of the water flow on the sealing block, and eliminates the unstable factors caused by water flow on the sealing block , so that the sealing block is pressed tightly on an inner wall of a valve body.

A liquid injector for injection of liquids into internal combustion engines is provided. The injectors have a plurality of jets aimed at a common collision point, where at least two jet streams collide to create a finely atomized liquid due to kinetic energy dissipated by the impact of the liquid streams. The angle formed by the jets, the pressure applied and the distance at which the jets collide is such that the loss of forward momentum is greater than the energy required to create particles smaller than 5 microns. Liquids injected may include gasoline, diesel-type fuels, or water. The injectors may be employed for port injection or direct injection.

The invention relates to a method for producing a central housing part (1) of a high-pressure slide gate valve from high-temperature steel, in the case of which two die-forged central-housing-part half-shells (1a, 1b) with forged-on connectors (4a, 4b) are welded to one another, using electron-beam welding without any welding filler material, by a butt weld seam (2), which runs in a plane (3) which runs transversely to the connectors (4a, 4b) and subdivides the central housing part (1). In order to increase the creep resistance, and to reduce the weight, of such a central housing part, the production costs at the same time being advantageous, the invention proposes that the wall thicknesses of the central-housing-part half-shells (1a, 1b) should be designed overall on the basis of a weld strength factor (WSF=1), and that, once the weld seam (2) has been produced, the entire central housing part (1) should be subjected to a rigorous heat treatment involving heating to beyond the transformation temperature, quenching and tempering.

Certain aspects of the present invention are directed to a distributed inflow control device that can be disposed in a wellbore through a fluid-producing formation. The distributed inflow control includes a shroud that can be disposed in the fluid-producing formation. The shroud circumferentially covers a section of a tubing string. The shroud includes a profile having multiple flow paths between the fluid-producing formation and an inner volume of the section of the tubing string. Each flow path restricts a fluid flow through the flow path and is independent of each other flow path. The distributed inflow control device also includes a seal over the profile including the flow paths. The seal causes fluid to flow from an inlet to an outlet of each flow path and prevents fluid from entering or exiting each flow path at a point other than the respective inlet or the respective outlet.