Abstract: Piston ring having an endless base ring and sealing ring have a radially outwardly directed base ring face side. The sealing ring has a radially inwardly directed, circularly running sealing ring inner side with three tangential cuts separating three sealing ring segments are arranged in a circumferential direction (U). The base and sealing rings are arranged in succession in a longitudinal direction (L). A top ring is arranged to adjoin the sealing ring having a top ring has a radially outwardly directed top ring outer side and a radially inwardly directed top ring inner side. The top ring has, on the side opposite the sealing ring, a radially running return flow channel extending radially, the sealing face side protrudes in a radial direction beyond the top ring outer side and the base ring face side. The base and the top rings have a greater tensile strength than the sealing ring.

Abstract: Poppet valve, plate valve, with a longitudinal axis (L), with a valve seat having a plurality of valve seat passage channels, with a catcher arranged at a distance from the valve seat in the direction of the longitudinal axis (L), and with a sealing element arranged movably between the valve seat and the catcher for opening and closing the valve seat passage channels. One of the valve components formed as the valve seat or the catcher having a plurality of passage channel limiting sections and a plurality of web portions, each extending mutually at an angle (?), wherein at least one of the valve components formed as valve seat or catcher is produced at least in sections by additive manufacturing, and wherein at least one of the passage channel limiting sections is dimensioned shorter in the direction of the longitudinal axis (L).

Abstract: An automatic plate valve having a valve seat, a valve guard, a longitudinal axis (L) and a valve element arranged between the valve seat and the valve guard and movable along the longitudinal axis (L) The valve seat includes an end face having with valve seat openings oriented towards the valve guard, and a plurality of passages, which have a fluid-conducting connection to the valve seat openings. The valve element includes sealing element interacting with the valve seat openings. Wherein some of the passages have a different distance to the longitudinal axis in a radial direction (R). The end face of the valve seat including a plurality of grooved recesses, forming valve seat openings, with passages open into the same recess, the passages forming a fluid-conducting connection to the valve seat opening. Some of these passages connected to the valve seat opening have different distances to the longitudinal axis.

Abstract: An oil wiper packing for a piston rod of a crosshead piston compressor, and corresponding assembly method. The oil wiper packing has at least one chamber disc having a chamber disc cutout, wherein a wiper ring arranged in the chamber disc cutout. At least two chamber discs, each having a chamber disc cutout, are arranged in succession in a direction of extent (L), and a single wiper ring is in each chamber disc cutout. Each wiper ring has no play or only negligible play in the direction of extent (L) in the operating state but is movable in the radial direction. It is necessary to set the play in in the cold state during the assembly of the wiper rings. Such an arrangement allows advantageous wiping of oil, preventing oil from spreading in the direction of extent of the piston rod.

Abstract: Poppet valve for a piston compressor, having a valve body with a plurality of inlet ducts, wherein each inlet duct has an inlet section and an outlet section. The outlet section opens into a valve seat, wherein each inlet duct is assigned a closing element and a spring. The closing element can be moved in an axial direction (A) in such a way that the valve seat can be closed by way of the closing element. The spring has a first spring end section and a second spring end section, wherein the spring is arranged in the inlet duct and bears with the first spring end section against and is held on the inlet section of the inlet duct. The second spring end section is connected to the closing element, to bring about a pre-stressing force on the closing element, which pre-stressing force is oriented towards the valve seat.

Abstract: A filler particle containing fibres, in which two or more fibres are enclosed at least partially in a solid particle made of a polymer selected from the group consisting of polyphenylene sulfides, liquid-crystal polymers, polyphenylene sulfones, polyether sulfones, thermoplastic polyimides, polyamide-imides, epoxy resins, perfluoroalkoxy polymers and any mixtures of two or more of the abovementioned polymers, wherein the end opposite the end enclosed in the solid particle of at least some fibres protrudes out of the solid particle. The fibres having a maximum length of 1000 ?m and a maximum thickness of 100 ?m. Such fibres can be obtained by mixing the polymer with fibres, by melting the polymer and/or chemical reaction of the polymer components, by cooling the mixture of molten polymer and fibres to give a solid fibre-polymer composite and by comminution of the fibre-polymer composite to give filler particles containing fibres a maximum length of 1000 ?m.

Abstract: A valve closure for a piston compressor valve including: a valve seat having a plurality of passage openings, a shaft having an axis of rotation (D), and a rotatable closing element connected to the shaft for opening and closing the passage openings, the valve seat having a flat end face, to which the passage openings lead and a center (Z): the passage openings extending radially to the center (Z); and the closing element having a center point (M) and a plurality of closing arms extending radially to the center point (M). The shaft can be rotated about the axis of rotation and can be slid in the extension direction of the axis of rotation extending perpendicularly to the end face and through the center (Z); each closing arm having a sealing surface substantially complementary to the passage openings in accordance with the rotation of the closing element.

Abstract: A poppet valve including a valve seat cover having a plurality of inlet channels, wherein each inlet channel opens into a valve seat, and includes a plurality of closing elements, which are movable in an axial direction (A), wherein a closing element, which is movable in an axial direction (A), is associated with each valve seat in order to close the valve seat, wherein all closing elements are arranged on a common closing element holding device and the closing element holding device is movable in the axial direction (A) such that the closing elements can assume at least two positions, an open position, in which the closing elements are raised relative to the valve seats, and a closed position, in which the closing elements rest against the valve seats.

Abstract: A piston compressor valve including a valve seat having a plurality of through openings including a closing element which is rotatable about an axis of rotation (D) for opening and closing the through openings and having an actuating drive for rotating the closing element, wherein the valve seat has an end face into which the through openings lead, wherein the closing element is movably connected to the actuating drive in the running direction of the axis of rotation (D), such that the closing element is both rotatable about the axis of rotation (D) and also movable in the running direction of the axis of rotation (D) relative to the end face, and having a sensor for detecting a condition variable (E) of the piston compressor valve, and having a control device which activates the actuating drive as a function of the condition variable (E).

Abstract: A method for expanding a compressed gas (GD) at a gas pressure (pD) with a reciprocating-piston machine, wherein the reciprocating-piston machine includes a piston that can move to and fro and a working chamber delimited by the movable piston. The method being carried out as follows: the compressed gas (GD) is supplied to the working chamber via an actuatable rotary slide valve, wherein the compressed gas (GD) in the working chamber is expanded in the working chamber.

Abstract: Piston ring having an endless base ring and sealing ring have a radially outwardly directed base ring face side. The sealing ring has a radially inwardly directed, circularly running sealing ring inner side with three tangential cuts separating three sealing ring segments are arranged in a circumferential direction (U). The base and sealing rings are arranged in succession in a longitudinal direction (L). A top ring is arranged to adjoin the sealing ring having a top ring has a radially outwardly directed top ring outer side and a radially inwardly directed top ring inner side. The top ring has, on the side opposite the sealing ring, a radially running return flow channel extending radially, the sealing face side protrudes in a radial direction beyond the top ring outer side and the base ring face side. The base and the top rings have a greater tensile strength than the sealing ring.

Abstract: A poppet valve including a valve seat cover having a plurality of inlet channels, wherein each inlet channel opens into a valve seat, and includes a plurality of closing elements, which are movable in an axial direction (A), wherein a closing element, which is movable in an axial direction (A), is associated with each valve seat in order to close the valve seat, wherein all closing elements are arranged on a common closing element holding device and the closing element holding device is movable in the axial direction (A) such that the closing elements can assume at least two positions, an open position, in which the closing elements are raised relative to the valve seats, and a closed position, in which the closing elements rest against the valve seats.

Abstract: The present invention relates to a sealing element and/or guide ring manufactured from a composition comprising: i) 50% to 98% by weight of polytetrafluoroethylene and/or modified PTFE, ii) 1% to 49% by weight of perfluoroalkoxy polymer and iii) 1% to 49% by weight of an inorganic filler selected from the group comprising charcoal, graphite, glass fibers, carbon fibers, molybdenum disulfide, metals such as copper, alloys such as bronze, ceramic particles such as aluminum oxide and any desired mixtures of two or more of the aforementioned substances.

Abstract: A piston compressor valve including a valve seat having a plurality of through openings including a closing element which is rotatable about an axis of rotation (D) for opening and closing the through openings and having an actuating drive for rotating the closing element, wherein the valve seat has an end face into which the through openings lead, wherein the closing element is movably connected to the actuating drive in the running direction of the axis of rotation (D), such that the closing element is both rotatable about the axis of rotation (D) and also movable in the running direction of the axis of rotation (D) relative to the end face, and having a sensor for detecting a condition variable (E) of the piston compressor valve, and having a control device which activates the actuating drive as a function of the condition variable (E).

Abstract: A valve closure for a piston compressor valve including: a valve seat having a plurality of passage openings, a shaft having an axis of rotation (D), and a rotatable closing element connected to the shaft for opening and closing the passage openings, the valve seat having a flat end face, to which the passage openings lead and a center (Z): the passage openings extending radially to the center (Z); and the closing element having a center point (M) and a plurality of closing arms extending radially to the center point (M). The shaft can be rotated about the axis of rotation and can be slid in the extension direction of the axis of rotation extending perpendicularly to the end face and through the center (Z); each closing arm having a sealing surface substantially complementary to the passage openings in accordance with the rotation of the closing element.

Abstract: A poppet valve for a piston compressor having a catcher, a valve body with a plurality of inlet ducts opening into a valve seat, and a plurality of closing elements which can be moved in an axial direction. Each inlet duct is assigned a closing element, and the valve seat is arranged to lie opposite the associated closing element in the axial direction in such a way that the valve seat can be closed by way of the closing element A spring is arranged between the catcher and the closing element, to bring a pre-stressing force on the closing element, which pre-stressing force is oriented towards the valve seat. The spring encloses an inner space. A guide part which runs in the axial direction is arranged on the catcher, on which guide part the closing element is mounted such that it can move, in the axial direction.

Abstract: The invention relates to a sealing assembly (1) for sealing a piston rod (2) of a piston compressor, which piston rod extends in an axial direction (A) and can be moved back and forth in the axial direction (A).

Abstract: The dry-running piston rod packing for sealing a piston rod supported in such a way that the piston rod can be moved in a longitudinal direction (L) having at least one chamber ring, a sealing chamber, and a sealing ring arranged in the sealing chamber, wherein the piston rod packing has a high-pressure side and a low-pressure side, wherein a lift-off device is designed and arranged in such a way that the lift-off device can lift and lower the sealing ring in the longitudinal direction (L).

Abstract: The dry-running piston rod packing for sealing a piston rod supported in such a way that the piston rod can be moved in a longitudinal direction (L) having at least one chamber ring, a sealing chamber, and a sealing ring arranged in the sealing chamber, wherein the piston rod packing has a high-pressure side and a low-pressure side, wherein a lift-off device is designed and arranged in such a way that the lift-off device can lift and lower the sealing ring in the longitudinal direction (L).

Abstract: A poppet valve for a piston compressor having a catcher, a valve body with a plurality of inlet ducts opening into a valve seat, and a plurality of closing elements which can be moved in an axial direction. Each inlet duct is assigned a closing element, and the valve seat is arranged to lie opposite the associated closing element in the axial direction in such a way that the valve seat can be closed by way of the closing element A spring is arranged between the catcher and the closing element, to bring a pre-stressing force on the closing element, which pre-stressing force is oriented towards the valve seat. The spring encloses an inner space. A guide part which runs in the axial direction is arranged on the catcher, on which guide part the closing element is mounted such that it can move, in the axial direction.