A diaphragm valve includes a valve body defining a fluid passageway, a diaphragm assembled with the valve body, and an annular metal valve seat disposed on the valve body surrounding the fluid passageway, the valve seat defining an inverted frustoconical seat sealing surface for sealing against the diaphragm when the diaphragm is in a closed position.

A diaphragm valve includes a valve body defining a fluid passageway, a diaphragm assembled with the valve body, and an annular metal valve seat disposed on the valve body surrounding the fluid passageway, the valve seat defining an inverted frustoconical seat sealing surface for sealing against the diaphragm when the diaphragm is in a closed position.

An assembly and method for a choke valve body having a choke valve to control flow of fluids. A sleeve positioned in and attached to the choke valve body to flow the fluids through an inner sleeve region internal to the sleeve instead of an outer sleeve region external to the sleeve.

An assembly and method for a choke valve body having a choke valve to control flow of fluids. A sleeve positioned in and attached to the choke valve body to flow the fluids through an inner sleeve region internal to the sleeve instead of an outer sleeve region external to the sleeve.

A bypass valve for an exhaust-gas turbocharger has a valve flap seat formed at one end of a bypass duct and a valve flap. The valve flap has, at the outer edge of the its closing surface, a flap skirt which, in the closed state of the bypass valve, extends from the closing surface predominantly in the direction of the valve seat axis beyond the valve flap seat and at least over a part of the valve flap outer circumference, such that the flap skirt at least partially surrounds the valve seat outer circumference of the valve flap seat and, in an overlap region, engages over the valve flap seat by the skirt height.

A bypass valve for an exhaust-gas turbocharger has a valve flap seat formed at one end of a bypass duct and a valve flap. The valve flap has, at the outer edge of the its closing surface, a flap skirt which, in the closed state of the bypass valve, extends from the closing surface predominantly in the direction of the valve seat axis beyond the valve flap seat and at least over a part of the valve flap outer circumference, such that the flap skirt at least partially surrounds the valve seat outer circumference of the valve flap seat and, in an overlap region, engages over the valve flap seat by the skirt height.

An internal combustion engine includes a valve seat insert within an engine housing, and a gas exchange valve. The valve seat insert has a compound valve seat with a valve recession-resistive profile formed by a leading radius contacted by the valve seat at an early wear state of the valve head and valve seat insert, a trailing radius contacted by the valve head at a later wear state of the valve head and valve seat insert, and an outer seat face. The compound valve seat is shaped and proportioned to cushion contact by a gas exchange valve and retard valve recession.

An assembly and method for a choke valve body having a choke valve to control flow of fluids. A sleeve positioned in and attached to the choke valve body to flow the fluids through an inner sleeve region internal to the sleeve instead of an outer sleeve region external to the sleeve.

An assembly and method for a choke valve body having a choke valve to control flow of fluids. A sleeve positioned in and attached to the choke valve body to flow the fluids through an inner sleeve region internal to the sleeve instead of an outer sleeve region external to the sleeve.

A system including a valve, including a valve body having an interior volume and a bore along a first axis, a stem extending along a second axis, and a flow control element coupled to the stem, wherein the stem is configured to selectively move the flow control element through the interior volume between a closed position and an open position relative to the bore, and a valve insert system configured reduce a size of the interior volume and to guide a lubricant to reduce wear on the flow control element.