An mixing device includes at least one mixing chamber, a memory, a processor coupled to the memory, and a set of instructions stored on the memory and configured to be executed by the processor. The processor is configured to determine a custom mixing recipe comprising a plurality of ingredient types and corresponding amounts for each of the plurality of ingredient types. The processor is further configured to insert the plurality of ingredient types into a first mixing chamber. A first amount of a first ingredient type and a second amount of a second ingredient type are inserted according to the custom mixing recipe. The processor is further configured to mix the plurality of ingredient types in the first mixing chamber. The processor is further configured to dispense a mixture of the plurality of ingredient types as at least one of a vapor, a fine powder, a mist, and a liquid.

A metering pump is joined to the stepping motor, includes an eccentric mechanism converting a revolving motion of the stepping motor into a reciprocating motion of a plunger, and makes a constant liquid delivery by sucking and discharging an anesthetic agent through variations in the cubic volume of a cylinder caused by the reciprocating motion of the plunger. The control section: calculates a suction and discharge cycle T of the metering pump on the basis of a set anesthetic-gas concentration and a fresh-gas flow rate; sets a discharge period T2 of the cycle T to be longer than a suction period T1 of the cycle T; and controls the revolution speed of the stepping motor so that the travelling speed of the plunger is kept constant during the discharge period T2.

A mixing apparatus for producing aqueous calcined gypsum slurry includes a housing, a rotor assembly, and an actuator system. The housing defines a mixing chamber therewithin. A top lid of the housing includes a lid ring extending along a normal axis toward a bottom thereof. The rotor assembly includes a rotor disposed within the mixing chamber and a drive shaft extending along and rotatable about the normal axis. The rotor is rotatively coupled with the drive shaft and extends radially therefrom. The upper surface of the rotor and the lid ring are separated by a lid ring gap along the normal axis. The actuator system is arranged with the rotor assembly to selectively move the rotor over a range of travel along the normal axis between a lowered position and a raised position to selectively change the lid ring gap.

A hydrogen supply apparatus includes: an air path having an inlet and an outlet; a fan that is disposed in the air path and produces a flow of air from the inlet to the outlet; a first pipe having an end that forms a first supply port through which to supply hydrogen gas to the air path; a flow control device that is attached to the first pipe and adjusts a flow rate of the hydrogen gas; and a hydrogen gas sensor, disposed downstream of the fan or the end in a direction of flow of the air that detects a concentration of the hydrogen gas in the air path, where the end is disposed between the fan and the outlet or between the fan and the inlet in the air path.

A single-pass flow-through dry chemical mixing trailer for use with a well has a trailer, a refillable liquid storage tank, a main liquid storage tank valve, a liquid storage tank inlet valve, an onboard power supply, a motor with a fuel supply, a transmission, a fluid circulation loop, a self-priming bidirectional flow alternating centrifuge pump, an automated mixer assembly, and a discharge tank. The refillable liquid storage tank prevents backflow to the self-priming bidirectional flow alternating centrifuge pump while flowing the homogenized slurry to the well and the dry chemicals introduced at the automated mixer are subjected to high shear forces, incorporating the dry chemicals into the liquid with increased dispersion and reduced agglomeration.

A single-pass flow-through dry chemical mixing trailer for use with a well has a trailer, a refillable liquid storage tank, a main liquid storage tank valve, a liquid storage tank inlet valve, an onboard power supply, a motor with a fuel supply, a transmission, a fluid circulation loop, a self-priming bidirectional flow alternating centrifuge pump, an automated mixer assembly, and a discharge tank. The refillable liquid storage tank prevents backflow to the self-priming bidirectional flow alternating centrifuge pump while flowing the homogenized slurry to the well and the dry chemicals introduced at the automated mixer are subjected to high shear forces, incorporating the dry chemicals into the liquid with increased dispersion and reduced agglomeration.

A resistivity regulating apparatus includes: a gas dissolving device that causes a regulating gas to dissolve in a liquid targeted for resistivity regulation to generate a treated liquid in which the regulating gas is dissolved in the liquid, the regulating gas being used to regulate a resistivity of the liquid; and a buffer tank to which the treated liquid discharged from the gas dissolving device is fed.

A measuring a closed-loop fluid transfer system is provided that includes a measuring adapter having a first end and a second ends, and a chamber located there between and configured to hold a volume of fluid. The measuring adapter includes a first receiving valve assembly located at the first end of the measuring adapter. The first receiving valve assembly includes a receiving valve member, at least a portion of which is separable from a portion of the first receiving valve assembly. This creates an opening that provides fluid communication to the chamber when a force is exerted on the receiving valve member of the first receiving valve assembly. A second valve assembly located at the second end of the measuring adapter includes a valve member. At least a portion of the valve member of the second valve assembly is separable from a portion of the second valve assembly to create an opening that provides fluid communication to the chamber.

A mixed gas supply device includes: a hydrogen gas generation unit that includes a hydrogen generator, the hydrogen generator generating hydrogen gas by decomposition of water and supplying the hydrogen gas; a nitrogen gas generation unit that includes a filter, the filter separating nitrogen gas from air and supplying the nitrogen gas; a gas mixing unit that mixes the supplied hydrogen gas and the supplied nitrogen gas and generates mix gas including the hydrogen gas and the nitrogen gas; and a single base on which the hydrogen gas generation unit, the nitrogen gas generation unit, and the gas mixing unit are mounted, the hydrogen gas generation unit, the nitrogen gas generation unit, and the gas mixing unit being integrated. The gas mixing unit supplies the generated mixed gas to outside.

A measuring a closed-loop fluid transfer system is provided that includes a measuring adapter having a first end and a second ends, and a chamber located there between and configured to hold a volume of fluid. The measuring adapter includes a first receiving valve assembly located at the first end of the measuring adapter. The first receiving valve assembly includes a receiving valve member, at least a portion of which is separable from a portion of the first receiving valve assembly. This creates an opening that provides fluid communication to the chamber when a force is exerted on the receiving valve member of the first receiving valve assembly. A second valve assembly located at the second end of the measuring adapter includes a valve member. At least a portion of the valve member of the second valve assembly is separable from a portion of the second valve assembly to create an opening that provides fluid communication to the chamber.