In a method for regulating at least two fluids, a fluid feed flow Q is divided into n parts, the sum of the n parts being equal to Q, each of the n parts is sent to one of n processing units, each of the n processing units produces at least one processed flow, at least one processed flow of a first of the processing units is regulated by control means in order to keep the flow thereof constant at a value Q1 in nominal operation, at least one processed flow of a second of the processing units is regulated by control means in order to keep the pressure thereof constant in nominal operation and, in the event of a reduction of the feed flow Q, in reduced feed operation, if, preferably only if, the flow of the flow processed in the second processing unit of step v) drops and thus reaches a first minimum flow threshold, a processed flow in the first processing unit is regulated such that the processed flow having a value Q1 in nominal operation is reduced to a value less than Q1.

A chemical injection system for a resource extraction system includes a controller having a memory and a processor. The memory stores instructions that cause the processor to receive a first pressure from a first pressure sensor of the resource extraction system, receive a second pressure from a second pressure sensor of the resource extraction system, determine a flowrate of a produced fluid of the resource extraction system based on the first pressure and the second pressure, determine an ion concentration of the produced fluid, and adjust an injection rate of a chemical into the resource extraction system based on the flowrate of the produced fluid, the ion concentration of the produced fluid, or both.

A container for self-gassing liquids, the container comprising a receptacle and an insert arranged to seat within a neck of the receptacle, the insert being further arranged to engage and seal directly or indirectly with a connector extending across the neck of the receptacle. The insert defines a void defined by a base portion of the insert and a peripheral side wall of the insert extending within the neck of the receptacle, the insert comprising a hole in the base portion. The container further comprises a dip tube extending from a lower surface of the base portion to, or towards, the bottom of the receptacle. The dip tube defines a passageway through the base portion, or is connected and sealed to the lower side of a passageway through the insert, the passageway terminating in said void such that the hole and the passageway are in fluid communication with each other through the void. Self-gassing liquids may be safely stored and transported in the container without risk of over-pressurisation of the internal volume of the container, which may also be quickly and easily installed into a dispensing device by the end user, requiring minimal handling by the user.

A system and method for dividing a single mass flow into secondary flows of desired ratios to total flow. Each secondary flow line includes a pressure drop element, an absolute pressure sensor and a differential pressure sensor. The nonlinear relationship between flow and pressures can be transformed into a function of the absolute and differential pressures that has a linear relationship with the flow.

Embodiments of fast gas exchange (FGE) manifolds are provided herein. In some embodiments, a FGE manifold includes: a manifold housing having a plurality of inlets and a plurality of outlets for flowing a plurality of process gases therethrough, wherein the plurality of outlets correspond with a plurality of zones in the process chamber; a plurality of hybrid valves disposed in the manifold housing and fluidly coupled to the plurality of inlets; a plurality of mass flow controllers disposed in the manifold housing downstream of the plurality of hybrid valves; a plurality of mixing lines extending downstream from the plurality of mass flow controllers to a plurality of outlet lines; and a plurality of outlet valves disposed in line with corresponding ones of the plurality of outlet lines, wherein a flow path is defined between each inlet of the plurality of inlets and each outlet of the plurality of outlets.

A hybrid flow ratio controller system is provided, which includes an inlet configured to receive a total inlet fluid flow and three or more distribution channels. Each of the three or more distribution channels has a respective variable flow control valve and carries a respective portion of the total inlet fluid flow. The hybrid flow ratio controller further includes a controller operatively coupled to the respective variable flow control valves. The controller is configured to control a flow rate of at least a first distribution channel according to a predetermined flow ratio of the inlet fluid flow in accordance with a flow ratio control mode, to control a flow of at least a second distribution channel in either a flow rate control mode or a pressure control mode, and to control a third distribution channel in an overflow mode.

A master controller determines a first flow setpoint for a process flow gas and/or a carrier gas flow through a first mass flow controller. The master controller obtains a back pressure setpoint of a distribution manifold and determines a second flow setpoint for the process gas flow and/or the carrier gas flow through a second mass flow controller or a back pressure controller based on the determined first flow setpoint and the obtained back pressure setpoint. The master controller controls the process gas flow and/or the carrier gas flow through the first mass flow controller to the first flow setpoint and the second mass flow controller and/or the back pressure controller to the second flow setpoint. The master controller controls the back pressure of the distribution manifold to the back pressure set point in view of a back pressure reading from a back pressure sensor of the distribution manifold.

Provided is a concentration control system that has only a small time delay, obtains accurate estimated values, and also enables partial pressure control having improved responsiveness and accuracy. The system includes a flow rate control device provided on a supply flow path that supplies gas to a chamber, and controls a flow rate of a gas in the supply flow path to match a set flow rate, a partial pressure measurement device for a gas inside the chamber, an observer having a model which estimates a state of the gas inside the chamber, where a flow rate of the gas flowing into the chamber and measured partial pressures are input into the model, and an estimated partial pressure of the gas within the chamber is output, and a controller that, based on a set partial pressure and on the estimated partial pressure, sets the set flow rate.

A flow ratio controller (FRC) valve includes a displacement device configured to control fluid flow through the FRC valve, a displacement sensor coupled to the displacement device, and a processing device. The processing device is to: identify an input signal indicative of a first setpoint to preposition the displacement device for a process of a recipe; commence, based on the input signal, adjustment of physical displacement of the displacement device; determine, based on a feedback signal received from the displacement sensor during the adjustment, whether the physical displacement of the displacement device matches the first setpoint; and responsive to determining that the physical displacement of the displacement device matches the first setpoint, stop the adjustment of the physical displacement of the displacement device.

Methods for simultaneously determining the concentrations of transition metal compounds in solutions containing two or more transition metal compounds are described. Polymerization reactor systems providing real-time monitoring and control of the concentrations of the transition metal components of a multicomponent catalyst system are disclosed, as well as methods for operating such polymerization reactor systems.