A valve apparatus for controlling the flow and pressure of fluids from a source of pressurized fluid with: a valve body, a valve chamber, a seat assembly in the valve chamber; a control member in the valve chamber axially movable with respect to the seat assembly, a lower stem connected to an output of an actuator of the valve, a valve bonnet attached to the valve body; the valve bonnet having a valve bonnet through bore with the lower stem slidingly reciprocating, moving the control member between the closed and open position, an annular sealing assembly, an outer seat carrier engaged within the valve body; the outer seat carrier comprising two elongated longitudinally disposed radial slots each oriented at right angles to the inlet port to impact a diversion wall of the outer seat carrier, splitting the inlet fluid into two flows simultaneously, reducing erosion on the radial slots.

A valve section for a hydraulic system includes at least a first hydraulic port and a second hydraulic port, a spool, a pressure channel, a collector channel, an inlet pressure compensator disposed between the pressure channel and the spool, and an outlet pressure compensator disposed between the spool and the collector channel. The spool selectively connects the first hydraulic port to the pressure channel and the second hydraulic port to the collector channel or connects the first hydraulic port to the collector channel and the second hydraulic port to the pressure channel. The inlet pressure compensator and the outlet pressure compensator are controllable via a signal pressure device. An external additional force component dependent on an operating state of the hydraulic system acts on the hydraulic port connected to the collector channel on the signal pressure device such that the inlet pressure compensator blocks the pressure channel.

A valve section for a hydraulic system includes at least a first hydraulic port and a second hydraulic port, a spool, a pressure channel, a collector channel, an inlet pressure compensator disposed between the pressure channel and the spool, and an outlet pressure compensator disposed between the spool and the collector channel. The spool selectively connects the first hydraulic port to the pressure channel and the second hydraulic port to the collector channel or connects the first hydraulic port to the collector channel and the second hydraulic port to the pressure channel. The inlet pressure compensator and the outlet pressure compensator are controllable via a signal pressure device. An external additional force component dependent on an operating state of the hydraulic system acts on the hydraulic port connected to the collector channel on the signal pressure device such that the inlet pressure compensator blocks the pressure channel.

Damping valve having a damping valve body with at least one passage channel between two cover sides. An outlet opening of the passage channel leads into a cover-side annular channel which is limited by an outer annular valve support surface and by an inner annular valve support surface, the at least one annular valve support surface for at least one valve disk has a substantially constant width along the circumference, and the annular channel has a varying width along the circumference, and at least one valve support surface has a varying radius of curvature along the circumference.

Damping valve having a damping valve body with at least one passage channel between two cover sides. An outlet opening of the passage channel leads into a cover-side annular channel which is limited by an outer annular valve support surface and by an inner annular valve support surface, the at least one annular valve support surface for at least one valve disk has a substantially constant width along the circumference, and the annular channel has a varying width along the circumference, and at least one valve support surface has a varying radius of curvature along the circumference.

A fluid discharge device includes a hollow tubular body. The hollow tubular body defines a flow channel and has a plurality of bore holes arranged along a longitudinal direction of the hollow tubular body. The hollow tubular body includes a plurality of sections, two adjacent sections of the plurality of sections are connected by a choke ring, and the choke ring has an opening to allow a fluid to pass through. In a sectional plane perpendicular to the longitudinal direction, a sectional area of the opening is smaller than a sectional area of the flow channel.

A fluid discharge device includes a hollow tubular body. The hollow tubular body defines a flow channel and has a plurality of bore holes arranged along a longitudinal direction of the hollow tubular body. The hollow tubular body includes a plurality of sections, two adjacent sections of the plurality of sections are connected by a choke ring, and the choke ring has an opening to allow a fluid to pass through. In a sectional plane perpendicular to the longitudinal direction, a sectional area of the opening is smaller than a sectional area of the flow channel.

A first on-off valve 2 and a second on-off valve 3 each are a two-port valve. A first passage block 5 is provided with a first on-off valve-corresponding inflow passage 11 and a first on-off valve-corresponding outflow passage 12. A second passage block 6 is provided with a second on-off valve-corresponding inflow passage 14 and a second on-off valve-corresponding outflow passage 15. The second on-off valve-corresponding outflow passage 15 is in communication with an upstream side portion of the first on-off valve-corresponding outflow passage 12 via a communicating passage 13 formed in the first passage block 5. An orifice 20 is provided between the second on-off valve-corresponding outflow passage 15 and the communicating passage 13.