The present invention concerns a pump for high-density powder transfer. The pump for high-density powder transportation according to the present invention has four-stroke operation, in which four pumping chambers in reality constitute a system of two pairs of chambers in line with each other. This makes it possible to divide the overall flow rate per minute over four tanks. Each of the four tanks has a reduced capacity, to the benefit of the compactness of the pump and the reduction of the loading/emptying times of the single tank, by exploiting the fluid-dynamic principle of communicating vessels the system of pairs of chambers in line increases the overall powder storage volume, thanks to a constant depression.

A machine for making liquid or semi-liquid food products, specifically ice cream, includes a vessel for processing liquid or semi-liquid base products by means of a stirring device driven by a motor. The mixture in the vessel is transferred through a duct, along which movement means for moving the mixture are operatively located, these movement means comprising a rotary device including two juxtaposed discs, on which a series of rollers is mounted in such a way as to press a flexible portion of the duct, and an opposing element confronting the rollers.

A modular block for an electric pump for a fluid product, including a main body defining a housing extending along a main axis, the main body having a general shape having a discrete rotational symmetry relative to a reversion axis, the main axis of the housing within the housing extending on a first side of a central plane outside the central plane, the reversion axis being included in the central plane, and a pumping device extending at least partially in the housing of the main body.

A valve assembly comprising a valve guide and one or more weights coupled to and/or integral with the valve guide. The valve assembly may further comprising a valve body and a valve stem connecting the valve body to the valve guide. The valve assembly may be disposed in a fluid end of a positive displacement pump that is operated to flow a wellbore servicing fluid into a wellbore.

A fluid pumping device for portioned dispensation of viscous fluids includes a base, which is configured to be positioned on a substantially horizontal surface. A pipe is engaged to and extends from a top of the base. A pump is operationally engaged to the pipe distal from the base. A spout is engaged to and extends from the base. The spout and the pump are in fluidic communication with the pipe. A socket is engaged to the pump so that the pump is in fluidic communication with a reservoir defined by the socket. The socket is complementary to a neck of a container containing a viscous fluid and thus can threadedly engage the container so that the container is inverted relative to the substantially horizontal surface. The reservoir holds the viscous fluid flowing from the container. The viscous fluid is pumped through the pipe and the spout by the pump.

A fluid pumping device for portioned dispensation of viscous fluids includes a base, which is configured to be positioned on a substantially horizontal surface. A pipe is engaged to and extends from a top of the base. A pump is operationally engaged to the pipe distal from the base. A spout is engaged to and extends from the base. The spout and the pump are in fluidic communication with the pipe. A socket is engaged to the pump so that the pump is in fluidic communication with a reservoir defined by the socket. The socket is complementary to a neck of a container containing a viscous fluid and thus can threadedly engage the container so that the container is inverted relative to the substantially horizontal surface. The reservoir holds the viscous fluid flowing from the container. The viscous fluid is pumped through the pipe and the spout by the pump.

A fluid end assembly comprising a plurality of fluid end sections positioned in a side-by-side relationship. Each fluid end section comprises a housing made of multiple-piece construction. One or more pieces of the housing are configured to have a plurality of stay rods attached thereto. The stay rods interconnect the fluid end assembly and a power end assembly.

A fluid end assembly comprising a plurality of fluid end sections positioned in a side-by-side relationship. Each fluid end section comprises a housing made of multiple-piece construction. One or more pieces of the housing are configured to have a plurality of stay rods attached thereto. The stay rods interconnect the fluid end assembly and a power end assembly.

Apparatus and method for reducing pressure pulsations within drilling mud being pumped downhole by a plurality of pumps to thereby improve quality of mud-pulse telemetry. The apparatus may include a position sensor disposed in association with each pump and operable to generate a position signal indicative of operational timing of a corresponding one of the pumps, a surface telemetry device fluidly connected with the drilling mud and operable to output a telemetry quality signal indicative of the quality of mud-pulse telemetry, and a controller communicatively connected with the pumps, the position sensors, and the surface telemetry device. The controller may be operable to receive the position signal and the telemetry quality signal, and cause the pumps to change relative operational timing of the pumps based on the position signal and the telemetry quality signal to improve the quality of mud-pulse telemetry.

A turbine fracturing system and a controlling method thereof, a controlling apparatus and a storage medium are provided. The turbine fracturing system includes: N turbine fracturing apparatuses, wherein each of the N turbine fracturing apparatuses comprises a turbine engine, and N is an integer greater than or equal to 2; a fuel gas supply apparatus connected to the N turbine engines, wherein the fuel gas supply apparatus is configured to supply fuel gas and distribute the fuel gas to the N turbine engines as gaseous fuel; and a fuel liquid supply apparatus connected to at least one of the N turbine engines and configured to supply liquid fuel to at least one of the N turbine engines in a case that at least one of a flow rate and a pressure of the fuel gas decreases.