In a rotor for a fluid pump which is made radially compressible and expandable and has a hub and at least one conveying element which has a plurality of struts and at least one membrane which can be spanned between them, provision is made for a design in accordance with the invention which is as simple and inexpensive as possible that at least one first group of struts is pivotable in a pivot plane, starting from a common base, and can thus be spanned open in the manner of a fan, wherein the conveying element lies along the hub and contacts it over its full length in the expanded state to avoid a pressure loss at the margin of the conveying element between it and the hub and thus to realize an optimum efficiency.

To provide a simple embodiment of a rotor for a fluid pump which is nevertheless very flexible in handling and compressible, in accordance with the invention a conveying blade is provided having at least two struts and a membrane spanned between them in the expanded state, wherein the struts each have at least one joint, in particular more than one joint, which enables an angling in a first direction in a first movement plane and bounds an overelongation beyond an elongation angle of in particular 180 in the opposite second direction. In particular when a plurality of joints are provided at the struts, they, and with them the conveying blades, are particularly flexible for simple compressibility.

Disclosed is a transfer pump having a pump base with a pump chamber, tangential discharge and an outlet in the top surface of the pump base. A riser tube extends from the outlet and terminates at a launder in order to move molten metal out of a vessel with relatively little turbulence.

A chain tensioning arrangement for a column pipe which is configured to house a submersible pump. The chain tensioning arrangement includes a radially extending cross beam, a spring arrangement connected to the cross beam, at least one spring member, and an arm that is movably connected to the cross beam. The arm includes an engagement member configured to optionally engage a chain connected to the pump. The arm is displaceable in the axial direction between a lower position and an upper position. The spring member is arranged to displace the arm in the direction from the lower position towards the upper position. Also described is a pump station including a column pipe, a submersible pump arranged in the column pipe and an axially extending chain connected to the pump and configured to move the pump in the column pipe.

A transfer pump system has a pump base with a pump chamber, tangential discharge and an outlet. A riser tube extends from the outlet and terminates at a launder in order to move molten metal out of a vessel with relatively little turbulence. A riser tube for use in the system has a proximal end configured to be connected to the outlet and a distal end that terminates at or above the launder.

A transfer pump system has a pump base with a pump chamber, tangential discharge and an outlet. A riser tube extends from the outlet and terminates at a launder in order to move molten metal out of a vessel with relatively little turbulence. A riser tube for use in the system has a proximal end configured to be connected to the outlet and a distal end that terminates at or above the launder.

A lift-out pump disconnect system is mounted to two parallel rails that are affixed to a pump enclosure. The disconnect system has a receiver body that is affixed to the rails and slidable along the rail axes with ear portions. The disconnect system further includes an outlet body that mates to the receiver body using tabs that slide on clamping ramped surfaces on the receiver body. Downward movement of the outlet body causes the clamping ramped surfaces to move the outlet body closer to the receiver body until flat sealing surfaces are in biased contact.

To provide a simple embodiment of a rotor (2) for a fluid pump which is nevertheless very flexible in handling and compressible, in accordance with the invention a conveying blade is provided having at least two struts (12, 13, 14) and a membrane spanned between them in the expanded state, wherein the struts each have at least one joint, in particular more than one joint, which enables an angling in a first direction in a first movement plane and bounds an overelongation beyond an elongation angle of in particular 180 in the opposite second direction. In particular when a plurality of joints (15, 16, 17) are provided at the struts, they, and with them the conveying blades, are particularly flexible for simple compressibility.

An assembly, comprising a basin, a submersible pump, having an outlet, disposed within the basin, and an adapter. The adapter comprises a housing having a first side and a second side, a reducing passage extending axially through the housing from the first side to the second side, wherein the reducing passage has a varying inner diameter such that a first inner diameter transitions to a second inner diameter, a plurality of fastener receiving holes extending transversely through the housing and disposed radially and circumferentially around the reducing passage, and a plurality of fastening elements extending from the housing at the second side. The submersible pump outlet is connected to the adapter on the second side and an existing discharge line connected to the adapter on the first side. The adapter provides a transition from a diameter of the submersible pump outlet to a diameter of the existing discharge line.

An assembly, comprising a basin, a submersible pump, having an outlet, disposed within the basin, and an adapter. The adapter comprises a housing having a first side and a second side, a reducing passage extending axially through the housing from the first side to the second side, wherein the reducing passage has a varying inner diameter such that a first inner diameter transitions to a second inner diameter, a plurality of fastener receiving holes extending transversely through the housing and disposed radially and circumferentially around the reducing passage, and a plurality of fastening elements extending from the housing at the second side. The submersible pump outlet is connected to the adapter on the second side and an existing discharge line connected to the adapter on the first side. The adapter provides a transition from a diameter of the submersible pump outlet to a diameter of the existing discharge line.