A control valve (10) includes a valve body with a plurality of ports (A, B, C, D, E, F) and a plurality of annular flow passages (53, 55,57). A piston (34) which includes a plurality of annular flow passages and a longitudinal flow passage is selectively movable within a bore (32) within the valve body through operation of a valve controller (70). The valve controller is selectively operative to control the position of the piston so as to enable liquid flow through a plurality of flow paths. A pump controller is operative to selectively control operation of a water well pump that supplies water to the control valve.

The present invention is a fluid distribution system comprising connected conduits (e.g., lines) wherein fluid flows, such as pipes within a building. The lines may be configured to: (i) include multiple lines that connect at intersections (some of the intersections will be identified as nodes); and (ii) incorporate node units associated with line pressure loss simulation assemblies (“LLSAs”). Activities of a node unit incorporating a LLSA can result in alterations in fluid pressure, such as by a loop control process to reposition balancing valves or other valves of one or more LLSAs, and/or by alteration of the speed of the system pump. These activities adjust fluid pressure to cause the system to produce a balanced and high efficiency energy transfer (e.g., heating or cooling), and do not involve or require any identification or use of any specific, fixed or absolute pressure value. They function based on an operation locus (for a node unit) and/or an operation locus range (for node unit groupings) to adjust the fluid pressure.

To diagnose an abnormality of a fluid control device from an operation of an entire fluid supply line including a plurality of fluid control devices. Provided is an abnormality diagnosis method of a fluid supply line including a plurality of fluid control devices F, V1, and V2 communicating with each other fluid-tightly. The abnormality diagnosis method has: a valve operation step of opening/closing any one or more of a valve FV in a flow rate control device, a valve V1, and a valve V2; a pressure adjustment step of setting a part or all of flow passages R1 and R2 leading from the valve V1 to the valve V2 via the flow rate control device to a vacuum state or a pressurization state; a pressure detection step of acquiring temporal pressure characteristics in a flow passage of the flow rate control device F by pressure detection mechanisms P1 and P2; and an abnormality determination step of comparing pressure characteristics at the time of abnormality diagnosis acquired by the pressure detection mechanisms P1 and P2 and pressure characteristics at the time of normality measured in advance under the same conditions, and determining whether or not there is an abnormality.

A system and method for irrigation, and managing irrigation of, a property or landscape. The system may include an irrigation management server (“IMS”) with the information for an irrigation system. The system may access the irrigation system that has been input into the IMS as well as access a third party map that may display the irrigation system over the map. The system may provide for a user's GPS location to be accessed through and identify the location of the user with respect to the map and irrigation overlay. The system display may provide information regarding the landscape to a user. The system may allow for manipulation of the irrigation system while overlaid on the map by the creation and manipulation of zones within the irrigation system as well as the creation and manipulation of other commands, including watering times and watering duration.

An exothermic reaction apparatus includes a reactor capable of accommodating a nanocomposite metal material, a cutoff unit provided in a gas pipe to cut off a supply of hydrogen to the reactor, a measurement unit that measures an occlusion rate of hydrogen in the nanocomposite metal material accommodated in the reactor, and a controller that controls the exothermic reaction apparatus. The controller controls the occlusion rate of hydrogen in the nanocomposite metal material accommodated in the reactor to a value within a range of 1.0 or more and 3.5 or less by controlling the cutoff unit during an exothermic reaction to stop the supply of hydrogen into the reactor when the occlusion rate of hydrogen in the nanocomposite metal material based on a measurement result obtained with the measurement unit approaches a predetermined value and to resume the supply of hydrogen into the reactor a predetermined time after.

A flow rate ratio control device smoothly switches branches without generating abrupt changes in the flow rates of a fluid flowing therethrough. The device includes at least two branches from a main flow path, first and second fluid control valves each including a position sensor for a valve body, a storage unit that stores reference positions of the valve bodies in order to divide the fluid flowing into the branches at predetermined ratios, and a control unit that controls the ratios of the branches by performing position control to place the valve body of the first valve in the reference position, and by performing flow rate control to set the flow rate of the second valve to a target flow rate. When the valve body of the second valve reaches the reference position, the control unit switches the position control and flow rate control between the valves.

The modular managed pressured drilling system provides multiple skids with individual chokes and PRVs on the skids. These skids secure to one another to construct a modular MPD system that provides the proper equipment for the drilling operation. An inlet flow junction and an outlet flow junction are secured to each skid. The flow junctions provide multiple ports to provide different pathways for the drilling fluid through the flow junctions. The flow junctions may direct the fluid through a first choke, a second choke, a pressure relief valve, or a bypass.

System and method for controlling an irrigation system using feedback from flow meters installed in an irrigation system are described. The system and method allows for automatic detection of the number of flow meters and their relation to controls valves attached to an irrigation system and for precise and reliable fluid flow measurements. Typical water flows for the system are learned and then compared to current water flows to detect water leaks (i.e., high water flow), malfunctioning control valves and/or low water flow and subsequently trigger electronic alerts to the user when system malfunctions are detected.

A system and method for irrigation, and managing irrigation of, a property or landscape. The system may include an irrigation management server (“IMS”) with the information for an irrigation system. The system may access the irrigation system that has been input into the IMS as well as access a third party map that may display the irrigation system over the map. The system may provide for a user's GPS location to be accessed through and identify the location of the user with respect to the map and irrigation overlay. The system display may provide information regarding the landscape to a user. The system may allow for manipulation of the irrigation system while overlaid on the map by the creation and manipulation of zones within the irrigation system as well as the creation and manipulation of other commands, including watering times and watering duration.

A fracturing system is provided. In one embodiment, the fracturing system includes a fracturing manifold for routing fracturing fluid to multiple wells. The fracturing manifold can be coupled via fluid conduits to fracturing trees installed at the wells. In some cases, each fracturing tree that is coupled to the fracturing manifold is coupled by at least one rigid fluid conduit. The fracturing manifold can include a trunk line that provides fracturing fluid to multiple outlet branches, which can include valves for controlling flow of fracturing fluid to wells downstream of the valves. Additional systems, devices, and methods are also disclosed.