A piston pump for delivering fluids includes a piston, a cylinder element and a pressure chamber which is arranged between an inlet valve and an outlet valve and is closed by a cover, wherein a throttling mechanism for throttling the fluid flow is provided in the fluid flow downstream of the outlet valve, and a vehicle brake system has a piston pump of this type. The throttling mechanism includes a movable annular disc which is guided on the cylinder element and the internal diameter of which is adapted to the external diameter of the cylinder element, wherein the axial travel of the annular disc sets a variable first throttle cross section.

A valve plate (1) made of fiber-reinforced plastic for gas exchange valves for reciprocating piston compressors comprises at least two concentric sealing rings (3) which cooperate with corresponding sealing surfaces (4) at the valve seal (5) by way of profiled sealing surface (2) and that are connected by way of radial webs (6). In order to improve the flexibility of the valve plate (1) and the sealing behavior, the webs (6) are designed thinner along the entire radial extent thereof between the sealing rings (3) on both sides of the valve plate (1) compared to the adjacent thickness of the sealing rings (3).

A valve plate (1) made of fiber-reinforced plastic for gas exchange valves for reciprocating piston compressors comprises at least two concentric sealing rings (3) which cooperate with corresponding sealing surfaces (4) at the valve seal (5) by way of profiled sealing surface (2) and that are connected by way of radial webs (6). In order to improve the flexibility of the valve plate (1) and the sealing behavior, the webs (6) are designed thinner along the entire radial extent thereof between the sealing rings (3) on both sides of the valve plate (1) compared to the adjacent thickness of the sealing rings (3).

A valve for a reciprocating compressor having a valve seat with a plurality of flow channels which open into an end face of the valve seat; a valve plate having a planar sealing surface which is designed to control the flow channels of the valve seat and has passage openings which are spatially offset relative to the flow channels of the valve seat, at least one projection being arranged on the end face of the valve seat, which projection projects into a passage opening of the valve plate at least in a closed valve state.

A valve for a reciprocating compressor having a valve seat with a plurality of flow channels which open into an end face of the valve seat; a valve plate having a planar sealing surface which is designed to control the flow channels of the valve seat and has passage openings which are spatially offset relative to the flow channels of the valve seat, at least one projection being arranged on the end face of the valve seat, which projection projects into a passage opening of the valve plate at least in a closed valve state.

A valve for a reciprocating compressor having a valve seat with a plurality of flow channels which open into an end face of the valve seat; a valve plate having a planar sealing surface which is designed to control the flow channels of the valve seat and has passage openings which are spatially offset relative to the flow channels of the valve seat, at least one projection being arranged on the end face of the valve seat, which projection projects into a passage opening of the valve plate at least in a closed valve state.