In a rotor in rotor configuration, a pump has inward projections on an outer rotor and outward projections on an inner rotor. The outer rotor is driven and the projections mesh to create variable volume chambers. The outer rotor may be driven in both directions. In each direction, the driving part (first inward projection) of the outer rotor contacts a sealing surface on one side of an outward projection of the inner rotor, while a gap is left between a sealing surface of the other side of the outward projection and a second inward projection. The gap may have uniform width along its length in the radial direction, while in a direction parallel to the rotor axis it may be discontinuous or have variable size to create flow paths for gases.

A pump housing comprises a circumferential wall forming an outer wall of the pump housing; a pump casing which connects to the circumferential wall on a first outer side to form a first chamber, the pump casing comprising a central opening to form an axial supply of the pump housing for material to be pumped; and pressurizing means to pressurize the first chamber.

A sensing device for a centrifugal slurry pump having an impeller which rotates about an axis, the centrifugal slurry pump including a side liner and a main liner housed within an outer casing of the pump, the sensing device comprising; a body portion arranged to pass through the outer casing, wherein the body portion includes a sensor biased towards contact with either the side liner or the main liner of the pump.

Assemblies and methods for measuring the nose gap of a centrifugal pump may include using an ultrasonic transducer coupled to a suction liner of the centrifugal pump to measure the nose gap of a slurry pump for pumping a slurry mixture, which can include sand, rock, and other particulates. A signal analyzer may be used to determine the size of the nose gap based on scatterings and reflections of an ultrasonic pulse passing into or through the adjustable liner, through the medium being pumped, and reflected from the impeller. The assemblies and methods may provide an ability to obtain a real-time measurement of the nose gap during operation of the centrifugal pump, which may result in an ability to adjust nose gap to provide more efficient operation of the pump and reduced wear rates.

A wear element for a slurry pump. At least a portion of the wear element produces a magnetic field for attracting magnetic particles in a slurry processed by the slurry pump. The wear element includes a magnet arranged to generate a protective wear layer on a surface of the wear element. The slurry pump includes a pump housing and a wear element within the pump housing. At least a portion of the wear element produces a magnetic field for attracting magnetic particles present in a slurry processed by the slurry pump. A protective wear layer is formed in a slurry pump by arranging a wear element in a housing of the slurry pump. At least a portion of the wear element produces a magnetic field. A slurry including magnetic particles is pumped through the slurry pump and the magnetic particles are attracted by the magnetic field to create the protective wear layer.

A pump side part for use with a centrifugal slurry pump for pumping a fluid mixture containing particulate matter, the pump side part comprising a main body having a main axis, the main body including a side wall section which extends laterally with respect to the main axis and has opposite facing first and second sides, a plurality of formations on a surface of the second side including an inner formation and an outer formation in spaced relation to the inner formation, the formations being configured so that in use the formations generate a flow of the fluid mixture across the surface which detaches from the surface the particulate matter adjacent thereto.

A pump housing made of plastic sections is provided. The housing includes a first casing that has a first side facing the region in which a pumped medium will flow, and a second casing that has a second side facing the environment. The pump housing's first casing and second casing are both dimensionally stable, with a space between the first casing and the second casing. A filler material such as a self-expanding foam may be provided in the space. The pump casings may be standardized components, and multiple casings may be assembled to form pump housings to suit a particular application.

A split volute for a centrifugal pump is disclosed that provides a manufacturing advantage by improving the yield of high-chrome iron casting, providing for full surface coating capability using line-of-sight spray coating systems. Performance improvements include improved pump efficiency, abrasion resistance, and volute lifetime. Additional operational cost savings are enabled through reduced time required for common volute maintenance procedures and an increased replacement interval for the volute. Taken together, these advantages reduce the total cost of ownership of the split volute pump system.

A gas turbine and nozzle system is provided that includes a radial inflow turbine rotor and a volute providing a flow path to deliver a pressurized gas to a circumference of the radial turbine rotor. The volute incorporates a shape which substantially conforms to a radial turbine shroud contour. The volute includes at least first and second parts. A mating surface between the first and second parts is substantially aligned with a direction of pressurized gas flow in the volute.

Disclosed is a pump system comprising a pump and a sensor. The pump comprises a pump casing defining a pump chamber, an inlet for receipt of flowable material into the chamber, an outlet for discharge of flowable material from the chamber, and an impeller disposed within the pump chamber to accelerate flowable material within the pump chamber. The pump also comprises a transition region extending between an inner peripheral surface of the pump chamber and an inner peripheral surface of the outlet, the transition region configured in use to divert flowable material accelerated by the impeller to the outlet. The vibration sensor is mounted to the pump casing and arranged in use to detect vibration of the transition region.