Abstract: The invention concerns a mechanical seal device (1) with a mechanical seal (10) which comprises a dry-running protection device (20), the dry-running protection device (20) having at least one microsystem (21) which outputs a digital measured value (W), the microsystem (2) being arranged adjacent to the mechanical seal (10) and/or on and/or in the mechanical seal (10). The measured value (W) makes it possible to protect the mechanical seal (10) from overloads. Furthermore, the invention concerns a pump device (100) with such a mechanical seal device (1), the mechanical seal (10) being arranged in a shaft passage (102) and sitting on a pump shaft (103). Furthermore, the invention concerns a method of operating this pump device (100) in which the speed of a drive motor (105) of the pump shaft (103) is adapted on the basis of the digital measured value (W) of the microsystem (21).

Abstract: A pump impeller, which can be part of a pump, has an impeller surface and blades being arranged on the impeller surface, wherein at least one of the blades is a blade of the first type which has a blade edge which is inclined toward the front in the rotational direction. The pump impeller can also have blades of a first type and of a second type, the blade geometries thereof differing from one another. A housing element for a pump or of a pump has a housing inner wall defining a flow channel for a fluid medium extending along a central axis. The cross section of the flow channel is greater in a main flow direction and the housing inner wall has a surface structure configured such that it counteracts a return flow counter to the main flow direction along the housing inner wall of the fluid medium.

Abstract: A housing element for a pump or of a pump has a housing inner wall defining a flow channel for a fluid medium extending along a central axis. The cross section of the flow channel is greater in a main flow direction and the housing inner wall has a surface structure configured such that it counteracts a return flow counter to the main flow direction along the housing inner wall of the fluid medium. The housing element can act as a pump housing and be combined with a pump.

Abstract: A pump impeller, which can be part of a pump, has an impeller surface and blades being arranged on the impeller surface, wherein at least one of the blades is a blade of the first type which has a blade edge which is inclined toward the front in the rotational direction. The pump impeller can also have blades of a first type and of a second type, the blade geometries thereof differing from one another. A housing element for a pump or of a pump has a housing inner wall defining a flow channel for a fluid medium extending along a central axis. The cross section of the flow channel is greater in a main flow direction and the housing inner wall has a surface structure configured such that it counteracts a return flow counter to the main flow direction along the housing inner wall of the fluid medium.

Abstract: The invention concerns a mechanical seal device (1) with a mechanical seal (10) which comprises a dry-running protection device (20), the dry-running protection device (20) having at least one microsystem (21) which outputs a digital measured value (W), the microsystem (2) being arranged adjacent to the mechanical seal (10) and/or on and/or in the mechanical seal (10). The measured value (W) makes it possible to protect the mechanical seal (10) from overloads. Furthermore, the invention concerns a pump device (100) with such a mechanical seal device (1), the mechanical seal (10) being arranged in a shaft passage (102) and sitting on a pump shaft (103). Furthermore, the invention concerns a method of operating this pump device (100) in which the speed of a drive motor (105) of the pump shaft (103) is adapted on the basis of the digital measured value (W) of the microsystem (21).

Abstract: The invention relates to a pump device for operating vacuum drainage systems and for pumping sewage, in particular on watercrafts. This pump device comprises a drive device having a drive shaft that comprises a first shaft end and a second shaft end and can be rotated by means of the drive device. The pump device further comprises a centrifugal pump which has at least one impeller that is connected in a torque-proof manner to the drive shaft in the region of the first shaft end.

Abstract: A connection system (1) for detachably connecting a component element to a coated component part (3), includes a coupling element (2) that has a head (6) with a non-round outer cross-section and has a shank (5). The head (6) can be received by a frictional connection in a rotationally fixed manner in a head region (11) of a connection opening (4) of the component part (3). The shank (5) can be received in a friction-locked and/or firmly-bonded manner in a sealing region (12) of the connection opening (4). The head (6) has an internal geometry for connecting the component element.

Abstract: The invention relates to a pump, in particular a centrifugal pump (1), with a pump housing (2), wherein a motor shaft (5), which is connected to a pump impeller (6) arranged in the pump housing (2), extends through a shaft passage (4) in a rear wall (3) of the pump housing (2) and is mounted in the rear wall (3) by a mechanical seal arrangement (8).

Abstract: The invention relates to a centrifugal pump (1) that has a suction-side inlet (3) and at least one pressure-side outlet (4), wherein a rotatably mounted impeller (5) for pumping a pump medium from the inlet (3) to the outlet (4) and an impeller seat (10) are arranged in the pump housing (2). In order to achieve a high degree of sealing and a long service life, the impeller seat (10) is formed in a ring-shaped impeller protector (8) which is made from a corrosion-resistant material and is received in the pump housing (2), wherein an insertion region (7) of the impeller (5) is radially surrounded by the impeller protector (8). This impeller protector (8) protects the coating against damage to the impeller (5) in the impeller seat (10).

Abstract: The invention relates to apparatus driving circulation in baths, pools and the like, comprising a pump powered by a drive, further a filter section consisting of a housing and a cover, a filter being configured in said housing and being kinematically linked by hookup elements to the cover in a manner that said filter moves jointly with said cover.

Abstract: The invention relates to a centrifugal pump (1)that has a suction-side inlet (3) and at least one pressure-side outlet (4), wherein a rotatably mounted impeller (5) for pumping a pump medium from the inlet (3) to the outlet (4) and an impeller seat (10) are arranged in the pump housing (2). In order to achieve a high degree of sealing and a long service life, the impeller seat (10) is formed in a ring-shaped impeller protector (8) which is made from a corrosion-resistant material and is received in the pump housing (2), wherein an insertion region (7) of the impeller (5) is radially surrounded by the impeller protector (8). This impeller protector (8) protects the coating against damage to the impeller (5) in the impeller seat (10).

Abstract: The invention relates to a pump, in particular a centrifugal pump (1), comprising a pump housing (2) with an inlet (3) and an outlet (4), wherein a motor shaft (11), which is connected in a rotationally fixed manner to an impeller (12) arranged in the pump housing (2), is rotatable mounted in a rear wall (5) of the pump housing (2) by means of a primary mechanical seal arrangement (14), wherein a dry run protection system is assigned to the primary mechanical seal arrangement (14). In order to avoid downtimes and to keep maintenance costs low, the dry run protection system has a fluid volume (17) that is connected to a side of the primary mechanical seal arrangement (14), which side faces away from the impeller (12).

Abstract: The invention relates to a connection system (1) for detachably connecting a component element to a coated component part (3), comprising a coupling element (2) that has a head (6) with a non-round outer cross-section and has a shank (5), wherein the head (6) can be received by means of a frictional connection in rotationally fixed manner in a head region (11) of a connection opening (4) of the component part (3), and the shank (5) can be received in a friction-looked and/or firmly-bonded manner in a sealing region (12) of the connection opening (4), and the head (6) has an internal geometry for connecting the component element.

Abstract: The invention relates to a pump, in particular a centrifugal pump (1), with a pump housing (2), wherein a motor shaft (5), which is connected to a pump impeller (6) arranged in the pump housing (2), extends through a shaft passage (4) in a rear wall (3) of the pump housing (2) and is mounted in the rear wall (3) by means a mechanical seal arrangement (8). In order to ensure a high accuracy of fit of a seal seat even over a long service life, the seal seat (9) of the mechanical seal arrangement (8) is formed in a ring-shaped protector (10) that is made from a corrosion-resistant material and is fixedly arranged in the shaft passage (4) of the rear wall (3).

Abstract: The invention relates to a pump device for operating vacuum drainage systems and for pumping sewage, in particular on watercrafts. This pump device comprises a drive device having a drive shaft that comprises a first shaft end and a second shaft end and can be rotated by means of the drive device. The pump device further comprises a centrifugal pump which has at least one impeller that is connected in a torque-proof manner to the drive shaft in the region of the first shaft end.

Abstract: The invention relates to apparatus driving circulation in baths, pools and the like, comprising a pump powered by a drive, further a filter section consisting of a housing and a cover, a filter being configured in said housing and being kinematically linked by hookup elements to the cover in a manner that said filter moves jointly with said cover.