An apparatus for deagglomerating and aerosolizing particulate matter such as powders, the apparatus including a rotatable turntable having a plurality of circumferentially spaced wells adapted to contain a powder. A pair of conduits are fluidly connected to the turntable wells so that powder from the wells is inducted and drawn to two nozzles so that the powder is entrained in the gas flow exiting each nozzle. Furthermore, the nozzle outlets are aligned and spaced apart from each other, but positioned to direct their particle entrained gas flow in the opposite and facing direction to one another so that the flow from each nozzle impinges upon the flow from the other nozzle to further air mill and deagglomerate the individual powder particles.

The invention relates to a method and a dense phase powder pump (1) for conveying coating powder from a first powder reservoir (101) to a second downstream powder reservoir or to a downstream powder spray-coating gun (102) or the like installation for spraying coating powder. In order to reduce the number of components of the dense phase powder pump (1) that require maintenance, the dense phase powder pump (1) is designed as a single-chamber dense phase powder pump and has only a single powder conveyor chamber (4) for conveying coating powder.

A dense-phase powder pump for conveying powder-type materials, in particular coating powder, includes at least one powder conveying chamber with a filter element that has at least regions thereof accommodated in a casing body and at least one pinch valve that is or can be connected to an end region of the powder conveying chamber. In particular, the pinch valve includes a valve element with at least regions that are sleeve-like, wherein the peripheral wall thereof can be squeezed together transverse to the valve element longitudinal axis in order to change the through-flow cross-section, and also includes a substantially tubular support structure, in which at least regions of the valve element are accommodated, wherein the support structure consists of multiple shell elements which are arranged one after another around the peripheral wall in the peripheral direction of the peripheral wall of the valve element, each having an arched cross-section, and which are placed on the outside of the valve element in a radial direction relative to the valve element longitudinal axis.

A dense-phase powder pump for conveying powder has at least one powder conveying chamber with a gas-permeable filter element that has at least regions thereof accommodated in a casing body and at least one pinch valve that is or can be connected to an end region of the powder conveying chamber. In particular, the dense-phase powder pump has a pinch valve housing formed as the end piece of the powder conveying chamber, which pinch valve housing has a first region facing the powder conveying chamber and an opposing second region, wherein the first region of the pinch valve housing is designed to be connectable to the end region of the powder conveying chamber by means of a plug connection, in particular a sole plug connection, and wherein the second region of the pinch valve housing is designed to exchangeably accommodate the pinch valve.

A color changer has a common feed passage that is connected to two or more inlet passages. The common feed passage can be reverse purged in a direction that is opposite a direction of powder flow through the common feed passage. A valve element seals a supply port that connects the inlet passage to the common feed passage to eliminate dead space and form a near bore line seal. The valve element is an elastic material that expands in response to applied compressed air inside the valve element.

The invention relates to a dense phase powder pump and a method for operating a dense phase powder pump in a powder-conveying mode. In order, in a simple manner, to prevent or at least reduce powder accumulations and clogging with powder, in particular on the powder inlet side of the powder conveying chamber of the dense phase powder pump, and thus in the region of the powder inlet valves, according to the invention, during a predefined or specified time period in at least one output phase and preferably at the end time of the output phase of a powder cycle, at least one of the following conditions exists: i) the powder inlet valve of the dense phase powder pump is open; ii) the powder outlet valve of the dense phase powder pump is closed; and/or iii) the application of an overpressure to the powder conveying chamber of the dense phase powder pump is interrupted.

A multi-port metering pump assembly includes a manifold coupled to a metering pump. The manifold defines a central passage in fluid communication with a plurality of intermediate passages defined in the manifold. The manifold includes a plurality of outer passages. Each intermediate passage provides fluid communication between the central passage and a corresponding outer passage. A plurality of valves is coupled to the manifold. Each valve of the plurality of valves is located between an intermediate passage and a corresponding outer passage, and is configured to enable or prevent passage of fluid between a corresponding intermediate passage of the plurality of intermediate passages and a corresponding outer passage. The multi-port metering pump assembly also includes an electronic controller coupled to the plurality of valves, the electronic controller having an associated electronic interface and being programmable to selectively and independently open and close the valves of the plurality of valves.

A closed concentrated dry chemical dispersion system including a closed ingredient container having a volume of dry ingredient therein. The system provides a fluid container and a mixing chamber in which the dry ingredient and fluid can be mixed to form a formulation for delivery to a device such as agrochemical dispensing equipment. The system minimizes worker exposure to the chemicals and enables lower packaging and transportation costs.

A multi-port metering pump assembly includes a manifold coupled to a metering pump. The manifold defines a central passage in fluid communication with a plurality of intermediate passages defined in the manifold. The manifold includes a plurality of outer passages. Each intermediate passage provides fluid communication between the central passage and a corresponding outer passage. A plurality of valves is coupled to the manifold. Each valve of the plurality of valves is located between an intermediate passage and a corresponding outer passage, and is configured to enable or prevent passage of fluid between a corresponding intermediate passage of the plurality of intermediate passages and a corresponding outer passage. The multi-port metering pump assembly also includes an electronic controller coupled to the plurality of valves, the electronic controller having an associated electronic interface and being programmable to selectively and independently open and close the valves of the plurality of valves.

An apparatus for powder coating a welded pipe joint includes a coating head having a powder chamber and at least one vacuum chamber. The coating head is mounted to a carriage operable to circumferentially traverse a pipe workpiece. The powder chamber has at least one inlet for receiving an air/powder suspension, and at least one outlet for delivering the air/powder suspension to a pre-heated weld zone of the pipe, such that the suspension fuses to and coats the weld zone. The vacuum chamber has at least one powder inlet for receiving excess air/powder suspension from the weld zone, and is connectable to a source of vacuum for exhausting the excess air/powder suspension from the weld zone. The coating thickness in the weld zone can be controlled by coordinated regulation of the air/powder flow rate into the powder chamber and the exhaust flow rate from the vacuum chamber.