A pressure-controlling device (10) includes a pump (21), a connection pipe (30), a first valve (41), and a second valve (42). The pump (21) has an inlet port (211) and an outlet port (212). The connection pipe (30) has a first end in communication with the outlet port (212), and a second end in communication with the inlet port (211) and that has a first space (31) that contains the first end, a second space (32) that contains the second end, and a third space (33) that is located between the first space (31) and the second space (32).

Disclosed embodiments include an apparatus for reducing contamination or obstruction of a multi-directional flow filtration system. As one example, a scalper that is to be employed on a multi-directional flow filtration system comprises a body and a set of scalping walls forming a plurality of helical chambers, the set of scalping walls helically extending along at least a portion of an interior of the body in a longitudinal direction. In this way, the plurality of helical chambers may enable the multi-directional flow filtration system to passively scalp contaminants in a manner that improves overall operation of the multi-directional flow filtration system. Other embodiments may be described and/or claimed.

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.

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 powder conveyor has a pneumatically actuated dense phase powder pump and a pressure controller. The dense phase powder pump comprises at least one conveyor chamber having a powder inlet valve and a powder outlet valve. The pressure controller can be used to adjust and maintain a set pressure on the at least one conveyor chamber of the dense phase powder pump that is or can be previously defined and/or to adjust and maintain an actuation pressure on the powder inlet valve or the powder outlet valve that is or can be previously defined. The powder conveyor further comprises a gas flow detection device for detecting or determining a quantity of gas that is fed or removed per time unit when the set pressure is adjusted and maintained on the at least one conveyor chamber or a quantity of gas that is fed to the powder inlet valve or the powder outlet valve per time unit when the actuation pressure is adjusted and maintained. An evaluation device compares at least one detected or determined gas flow value with a corresponding set value and automatically generates an error and/or alarm signal when a deviation is detected.

A powder conveyor has a pneumatically actuated dense phase powder pump and a pressure controller. The dense phase powder pump comprises at least one conveyor chamber having a powder inlet valve and a powder outlet valve. The pressure controller can be used to adjust and maintain a set pressure on the at least one conveyor chamber of the dense phase powder pump that is or can be previously defined and/or to adjust and maintain an actuation pressure on the powder inlet valve or the powder outlet valve that is or can be previously defined. The powder conveyor further comprises a gas flow detection device for detecting or determining a quantity of gas that is fed or removed per time unit when the set pressure is adjusted and maintained on the at least one conveyor chamber or a quantity of gas that is fed to the powder inlet valve or the powder outlet valve per time unit when the actuation pressure is adjusted and maintained. An evaluation device compares at least one detected or determined gas flow value with a corresponding set value and automatically generates an error and/or alarm signal when a deviation is detected.

The invention relates to a powder supply device for a powder coating system having at least one powder container (24), which has a powder chamber (22), and having at least one powder dispensing device, which is connected or can be connected to a powder dispensing channel (13) opening into the powder chamber (22) via a powder dispensing opening (36), in order to extract coating powder from the powder chamber (22) during powder coating operation of the powder coating system. In order to achieve as homogeneous and effective a powder conveyance as possible using the powder supply device according to the invention, the at least one powder dispensing device is designed as a powder dense flux pump (4), in particular as a single-chamber powder dense flux pump (200).

There is provided a pneumatic pump (10) comprising a tubular steel frame (11) and a disc-shaped pressure vessel (12) including a lower, tangential transfer port (14) and an upper, radial ventilation port (15). A transfer assembly (16) on the port (14) includes an inlet assembly (17) having a positive-close non-return valve (21) and a delivery outlet assembly (20). A venturi assembly (22) applies suction to the ventilation port (15) and has an exhaust vent (24) including a closure assembly (25) selectively operable to cycle between a suction phase and a pressurized phase. A two way T-valve (40) selectively allows venturi exhaust air to pass selectively into either a diffuser/muffler (35) or a delivery line (42) downstream of an outlet non-return valve.

A sterile liquid pump, having replaceable single use components, with a first and second chamber, and a gas valve assembly to selectively communicate gas pressure and vacuum with the chambers, and a resilient tubing liquid manifold loop with a sequence of four ports located within a manifold receiver that supports four pinch actuators aligned to engage and selectively pinch-off flow through the manifold between adjacent pairs ports, and, a controller that operates the valve assembly to alternatingly couple pressure and vacuum to the pump chambers, and that also operates to alternatingly actuate pairs of the pinch actuators to sequentially pump fluid from pump chambers under gas pressure, and through an opposing pair of ports in the resilient tubing manifold.

A sterile liquid pump, having replaceable single use components, with a first and second chamber, and a gas valve assembly to selectively communicate gas pressure and vacuum with the chambers, and a resilient tubing liquid manifold loop with a sequence of four ports located within a manifold receiver that supports four pinch actuators aligned to engage and selectively pinch-off flow through the manifold between adjacent pairs ports, and, a controller that operates the valve assembly to alternatingly couple pressure and vacuum to the pump chambers, and that also operates to alternatingly actuate pairs of the pinch actuators to sequentially pump fluid from pump chambers under gas pressure, and through an opposing pair of ports in the resilient tubing manifold.