A system includes a dip tube, a feed line, and a check valve. The dip tube is inserted through an opening in a source of chemical precursor and into the chemical precursor in the source. A portion of the feed line is located in the dip tube. The feed line passes out of the dip tube. The chemical precursor is capable of flowing out of the source through the feed line in a downstream direction. The check valve is located in the portion of the feed line in the dip tube. The check valve permits the chemical precursor to pass substantially only in the downstream direction. The feed line is coupled to a transfer pump that draws the chemical precursor out of the source through the portion of the feed line in the dip tube.

There is provided an arrangement (100) which allows for mixing a first fluid with a second fluid at a predetermined volume mixing ratio in a capillary driven fluidic system. The arrangement (100) allows filling an initially empty mixing chamber (110) with the first fluid. The arrangement then allows emptying a predetermined fraction of the first fluid from the mixing chamber (110) such as to form an empty space in the mixing chamber (110). The arrangement then allows filling the empty space of the mixing chamber (110) with the second fluid, thereby allowing a predetermined volume of the first fluid to mix with a predetermined volume of the second fluid over time.

A fine bubble generator which is an ultrafine bubble generator includes a side wall whose inner face is cylindrical, and closing walls closing both ends of the side wall, respectively, with a gas-liquid discharge port in one of the closing walls, wherein a fluid inlet port is provided closer to the gas-liquid discharge port than is a midpoint between both closing walls, and the fluid inlet port penetrates the side wall in a tangential direction of the inner face of the side wall, wherein a spiral groove is formed in the inner face of side wall, and wherein the spiral groove has an angle of inclination of 1° to 10°.

A nanobubble nozzle includes a body; an inlet for receiving a liquid; an outlet for discharging the liquid with nanobubbles; a forward channel extending through the body from the inlet to the outlet for transmitting the liquid, the forward channel having a venturi throat; a return channel extending from the outlet to recirculate a portion of the liquid and mix it with a gas to form a two-phase mixture; and an inlet port connecting the return channel to the venturi throat. The liquid flow through the throat creates a suction drawing the two-phase mixture into the throat. A cross-sectional area of the forward channel decreases from the inlet to the throat and increases from the throat to the outlet so that an internal pressure lower than an external pressure outside the body and lower than a vapor pressure of the liquid flowing through the throat is provided at the throat.

Textile fibers at least partially coated with a coating that includes particles of metal-organic frameworks dispersed in a polymeric base are provided. Also provided are fabrics formed from the textile fibers, protective gear and articles of clothing made from the fabrics, and methods of using the fibers and fabrics to catalyze the hydrolysis of organic molecules, such as organophosphate-based nerve agents, having hydrolysable bonds.

A reciprocating mixer for mixing liquids comprises a mixing shaft supporting a mixing head. A reciprocating drive assembly is connectable to the shaft and comprises a reciprocating fluidically powered actuator having a vertically reciprocating drive shaft coupled to the mixing shaft, a first fluidic input and a second fluidic input. A fluidic control valve is connected to the first and second fluidic inputs of the actuator. A fluidic pump has a fluidic output connected to the fluidic input of the control valve. A control unit has a communication interface connected to the communication port of the fluidic control valve and the control input the fluidic pump. In use, the fluidic pump and the fluidic control valve are operated by the control unit to provide for a downward motion cycle portion and an upward motion cycle portion that impart the vertically reciprocating movement to the mixing head.

A foamed product dispensing system, wherein the system includes: a product dispensing machine, configured to receive an exchangeable product container; a product container, configured to cooperate with the product dispensing machine, after placement in the machine; wherein the product container contains a foamable product, preferably a food product, for example cream, wherein the product container is provided with a product processing unit including a frothing device having a product entrance for receiving product and a product exit for discharging product, wherein the processing unit is connectable to a gas supply for supplying gas to the product, wherein the system includes a hermetically sealable wall structure that encloses a container receiving space for receiving the container, wherein the wall structure includes a product outlet port that is closable (and sealable) by a thermally insulating closure member.

A multi-component fluid mixing device for mixing two or more fluids which can be used with an applicator tool, such as a spray gun. The mixing device is used with a removable cartridge that is pressure fitted into the body of the mixing device using an actuation mechanism that elevates a cartridge engagement base to create a fluid-tight seal.

A polymer dispersion system for use in a hydraulic fracturing operation is disclosed. The system comprises (a) a tank assembly comprising an ingress, an egress, and an interior volume for collecting mother solution; (b) a first transfer pump coupled with the egress of the tank assembly: and (c) a second transfer pump coupled with the egress of the tank assembly. The first transfer pump is configured for coupling to a missile unit and a blender unit downstream thereof, but in fluid communication with only one of such units at any given time when coupled. A method of operating said polymer dispersion system is also disclosed.

A slide gate assembly includes a mounting plate with a through opening and an upper surface, and a top plate with a through opening and lower surface, wherein the through opening of the top plate aligns with the through opening of the mounting plate. A slide plate is mounted between the lower surface of the top plate and the upper surface of the mounting plate, wherein the slide plate is slidable between a closed position and an open position, wherein, in the closed position the slide plate blocks material passage from the opening of the top plate to the opening of the bottom plate, wherein, in the open position, the slide plate permits material passage from the opening of the top plate to the opening of the bottom plate.