Pressure regulators together with associated methods and systems are provided. An embodiment of a pressure regulator includes a chamber having an inlet port for receiving a fluid and an outlet port for delivering the fluid at a regulated pressure. The pressure regulator includes a diaphragm defining at least part of the chamber, and the diaphragm defining a first orifice therethrough. The pressure regulator includes a spring configured to interact with the diaphragm. The pressure regulator includes an interface operatively disposed between the spring and the diaphragm. The interface includes a contact surface for contacting the diaphragm, and the contact surface is convex toward the diaphragm. The interface defines a second orifice therethrough that is in fluid communication with the first orifice in the diaphragm. The first and second orifices define a relief port for venting the chamber to an ambient environment external to the chamber.

A valve assembly using at least two pressure-sensitive leaky check valves has a non-linear flow-rate versus pressure-drop relation. A method for optimizing such a valve assembly is capable of determining a minimum required number of such valves and outputting the material parameters of each valve. The valve assembly and method allows for arbitrary flow control, which has numerous applications such as within drug delivery, food processing, and industrial flow control. The valve assembly is completely passive, i.e. there is no need for a feedback network. The flow control is achieved using only fluid-structure interactions.

A device for limiting or keeping constant a quantity of fluid flowing therethrough, includes: a housing with a front chamber and a rear chamber; a partition arranged in the housing with two or more openings; and a flow limiting element arranged in one or both openings. The flow limiting element includes a housing provided with an inlet, an outlet and a throughflow opening; and a resilient plate-like valve element mounted in the housing, substantially able to close the throughflow opening by resilient movement in the direction of a valve seat arranged in the housing adjacently of the throughflow opening. The valve element is fixed on one side and can move resiliently on the opposite side in the direction of the valve seat. A mould produces one or more injection-moulded products. The injection-moulded product is a flow limiter for limiting the force of the flow of a fluid flowing therethrough.

An actuator of an environmental control system of a building including a motor and a drive device driven by the motor and configured to drive a valve within a range of positions. The actuator includes one or more printed circuit boards including one or more processing circuits configured to obtain a raw measurement data set from transducers and generate a flow signal based on the raw measurement data set. The flow signal indicates a flow rate of a fluid through a conduit. The one or more processing circuits are configured to determine an actuator position setpoint based on a flow rate setpoint and the flow signal and operate the motor to drive the drive device to the actuator position setpoint. The motor, the drive device, and the one or more printed circuit boards are located within a common device chassis.

A diaphragm assembly for a mass flow controller is disclosed. The diaphragm assembly includes an aperture, side walls extending from the aperture and disposed about a central axis, the side walls including multiple convolutions, and a poppet including an interior surface facing the aperture and exterior sealing surface. At least a portion of the diaphragm assembly moveable extends and retracts within a control valve cavity of the mass flow controller. A push rod extending from the interior surface of the poppet moves, responsive to an actuator of the mass flow controller, to enable the exterior sealing surface of the poppet to open and close a flow path through the control valve cavity.

A valve assembly for controlling fluid flow rate comprising a valve block, a valve, a sensor chip package, and a controller interface. The valve block having an upstream reservoir, a downstream reservoir, and a valve seat for communicating fluid from an upstream location to a downstream location. The valve having a moveable member. The sensor chip package having at least one sensor coupled with the valve. The controller interface is communicable coupled to a control unit, the valve, and the sensor chip package. The controller interface sends at least one parametric value provided by the sensor chip package to the control unit. The controller interface receives a control signal used to adjust valve stroke of the valve. The control signal of the valve is determined based on the at least one measured parametric value and at least one other parametric value provided by a fluid processing system.

A pressure measuring and flow-rate controlling device includes: a flattening plate including a fluid cavity in the flattening plate; a flexible contact membrane provided on said flattening plate; a support member configured to secure the flattening plate against a sample; a pressure adjuster; an inlet tube connected to the pressure adjuster at a first end of the inlet tube, the inlet tube connected to a first end of the fluid cavity at a second end opposite to the first end of the inlet tube; and an outlet tube connected to a second end opposite of the first end of the fluid cavity, where the pressure adjuster is configured to control a flow rate of a fluid passing through the fluid cavity based on cell pressure of the sample.

Device for limiting or keeping constant a quantity of fluid flowing therethrough, comprising: a housing which comprises a front chamber and a rear chamber, a partition arranged in the housing and provided with two or more openings; and a flow limiting element arranged in one or both openings, the flow limiting element comprises the following: a housing provided with an inlet, an outlet and a throughflow opening; and a resilient plate-like valve element which is mounted in the housing and which can substantially close the throughflow opening by resilient movement in the direction of a valve seat arranged in the housing adjacently of the throughflow opening, wherein the valve element is fixed on one side and the valve element can move resiliently on the opposite side in the direction of the valve seat. Mould for producing one or more injection-moulded products, wherein at least a part of the mould is movable and adjustable from the outer side such that the size and/or the shape of the mould cavity is adjustable. The injection moulded product is a flow limiter for limiting the force of the flow of a fluid flowing therethrough, comprising: a housing provided with an inlet, an outlet and a throughflow opening; and a resilient plate-like valve element which is mounted in the housing and which can substantially close the throughflow opening by resilient movement in the direction of a valve seat arranged adjacency of the throughflow opening in the housing, wherein the valve element is fixed on one side and the valve element can move resiliently on the opposite side in the direction of the valve seat.

A check valve, including a valve and a valve support surface, to permit a fluid to move through the check valve in a first direction and resist a fluid flow through the valve in a second direction, the valve having a valve diaphragm and an isolating bridge, with a portion of the valve engaging against valve support surface to resist deformation or stretching of the valve when a backflow of fluid into the check valve occurs. The valve support surface having a first surface portion and a second surface portion, and the valve positioned with the valve diaphragm spaced apart from the first surface portion, and the isolating bridge spaced apart from the second surface portion.

Systems and methods include a computer-implemented method for performing an advanced control policy for a group of wells. Choke settings are applied to one or more control elements of each well in a group of wells. Rig control settings are applied to the group of wells. The rig control settings define, for each rule in a set of rules: a rule count limiting a number of times a rule is to be executed in a simulation run and a rule frequency identifying a time frequency by which the rule is to be executed during the simulation run. Settings are received for targets and constraints for the group of wells. The simulation run is executed for the group of wells using the choking settings, the rig control settings, and the settings for of the targets and constraints for the group of wells.