The invention provides a passive fluidics circuit for directing different fluids to a common volume, such as a reaction chamber or flow cell, without intermixing or cross contamination. The direction and rate of flow through junctions, nodes and passages of the fluidics circuit are controlled by the states of upstream valves (e.g. opened or closed), differential fluid pressures at circuit inlets or upstream reservoirs, flow path resistances, and the like. Free diffusion or leakage of fluids from unselected inlets into the common outlet or other inlets at junctions or nodes is prevented by the flow of the selected inlet fluid, a portion of which sweeps by the inlets of unselected fluids and exits the fluidics circuit by waste ports, thereby creating a barrier against undesired intermixing with the outlet flow through leakage or diffusion.

The present disclosure teaches an apparatus and a method for providing one or more substance liquids to a microfluidic channel network. The microfluidic apparatus includes valves for switching the one or more substance liquids to a microfluidic channel network. The apparatus can be used to generate a sequence of the one or more substance liquids as individual droplets in an immiscible separation liquid wherein individual ones of the sequence of droplets are located between the separation liquid.

A downhole valve to be used in a flow management system that comprises a valve inlet for coupling with a hydrocarbon reservoir pump outlet, a valve outlet for coupling with production tubing transport to the surface pumped hydrocarbons, a valve body with a valve body centerline that extends between the valve inlet and outlet, and a spill port for bypassing a backflow.

An apparatus and method for maintaining integrity of a dry pipe sprinkler system. The apparatus includes an auxiliary drain, the auxiliary drain including an input pipe, a condensate collection area, and a drain pipe; an insulated housing with a door configured to provide a heat controlled environment for the auxiliary drain, and wherein the auxiliary drain is at least partially located within the housing, and the condensation collection area is located within the housing; a heater configured to heat the housing; and an auxiliary drain alarm configured to provide a warning when the auxiliary drain retains a predetermined amount of condensate.

A hydrogen storage tank for a hydrogen fueled aircraft. The tank has a wall made of layers of aerogel sections around a hard shell layer, sealed within a flexible outer layer, and having the air removed to form a vacuum. The periphery of each layer section abuts other sections of that layer, but only overlies the periphery of the sections of other layers at individual points. The wall is characterized by a thermal conductivity that is lower near its gravitational top than its gravitational bottom. The tank has two exit passageways, one being direct, and the other passing through a vapor shield that extends through the wall between two layers of aerogel. A control system controls the relative flow through the two passages to regulate the boil-off rate of the tank.

A method comprises transporting a first stream of a carrier gas to a delivery device that contains a liquid precursor compound. The method further comprises transporting a second stream of the carrier gas to a point downstream of the delivery device. The first stream after emanating from the delivery device and the second stream are combined to form a third stream, such that the dew point of the vapor of the liquid precursor compound in the third stream is lower than the temperature of the plumbing that transports the vapor to a CVD reactor or a plurality of CVD reactors. The flow direction of the first stream, the flow direction of the second stream and the flow direction of the third stream are unidirectional and are not opposed to each other.

A medical device having a catheter and a fluid delivery conduit entirely disclosed within a portion of the catheter. The catheter may have a thermally transmissive region in fluid communication with the fluid delivery conduit and a rod disposed within at least a portion of the fluid delivery conduit. The medical device may control variable fluid flow with the ability to modify the effective cross-sectional area of the fluid delivery conduit available for fluid flow. Additional configurations provided herein may allow for the selective manipulation of a footprint or therapeutic pattern achievable with the medical device during a single procedure, negating the need for the removal and insertion of multiple devices to achieve the same variations in treatment geometry or characteristics.

A mixing valve includes a mixing chamber, a first flow control valve having a first flow control opening, and a second flow control valve having a second flow control opening. The first and second flow control openings each have a diameter of approximately six millimeters and the mixing valve has a flow coefficient of approximately 2.5 when both flow control valves are in a mid-open position.

A method for replacing a volume of coolant fluid in a circulating system in diesel engine system that includes the steps of establishing pneumatic connection with at least one location in the diesel engine coolant fluid circulating system; establishing fluid connection with at least one point in the diesel engine coolant fluid circulating system, the fluid connection location being different from the pneumatic connection; and after pneumatic and fluid connection is established, drawing a vacuum pressure through said pneumatic connection and introducing the volume of coolant fluid into the through said fluid connection as well as a device for accomplishing the same.

Certain embodiments described herein are directed to chromatography systems that include a microfluidic device. The microfluidic device can be fluidically coupled to a switching valve to provide for selective control of fluid flow in the chromatography system. In some examples, the microfluidic device may include a charging chamber, a bypass restrictor or other features that can provide for added control of the fluid flow in the system. Methods of using the devices and methods of calculating lengths and diameters to provide a desired flow rate are also described.