The present invention relates to methods for operating and controlling flow control systems. The method includes sensing an actual medium flow through a pipe part and outputting an electrical signal indicative of the sensed actual medium flow; comparing the sensed medium flow with a set medium flow and outputting a control signal; using an orifice adjusting system to adjust an adjustable orifice in a pipe part in response to the control signal; and performing a correction of a characteristic curve. The method can include setting an upper limit for medium flow to Vmax wherein Vmax is less than a maximum medium flow.

Disclosed is an apparatus for analyzing the composition of bodily fluid. The apparatus can include a fluid handling network including a patient end configured to maintain fluid communication with a bodily fluid in a patient and a pump unit in operative engagement with the fluid handling network. The pump unit can have an infusion mode, in which the pump unit is operable to deliver infusion fluid to the patient through the patient end, and a sample draw mode, in which the pump unit is operable to draw a sample of the bodily fluid from the patient through the patient end. The apparatus can include a spectroscopic analyzer positioned to analyze at least a portion of the sample; a processor in communication with or incorporated into the spectroscopic analyzer; and stored program instructions executable by the processor to obtain measurements of two or more properties of the sample.

A washing system that includes a vessel for storing a cleaning solution, an inlet connection point for pressurizing the vessel, and an outlet connection point for dispensing the cleaning solution. In one embodiment, the washing system includes a regulator valve configured to remain open and allow the inside of the vessel to be filled with pressurized gas via the inlet connection point when pressure inside the vessel is below a predetermined value and automatically close when pressure inside the vessel exceeds the predetermined value. In another embodiment, the washing system includes a relief valve (e.g., at the top of the vessel) that is configured to remain closed when pressure inside the vessel is below a predetermined value and automatically open when pressure inside the vessel exceeds the predetermined value.

A hydraulic pressure control apparatus includes a first pressure regulating valve for reducing an initial oil pressure (line pressure) of a working oil, a solenoid-operated valve for converting the oil pressure, which has been reduced in pressure, into a solenoid pressure, and a second pressure regulating valve for converting the line pressure of the working oil into an actuating pressure responsive to the solenoid pressure. The three valves share a single body. Further, an outlet passageway is formed along a thicknesswise direction of the body, with a relief valve being formed upwardly of the outlet passageway.

A method for controlling a ventilator includes the steps of providing an inhalation pressure limit, determining when a pressure in a connection to a patient circuit is greater than the inhalation pressure limit, and opening the valve when the pressure is greater than the inhalation pressure limit. An associated computer readable medium for controlling the method is also described.

A multi-phase flow meter includes a flow conduit leading from an inlet to an outlet and including a variable inlet restriction, a variable outlet restriction, a pressure sensor and a volumetric flow meter, located between the variable inlet restriction and the variable outlet restriction. The flow meter further includes a controller adapted to receive data from the pressure sensor and the volumetric flow meter, and to adjust the variable inlet restriction and the variable outlet restriction in accordance with at least one program. The program causes the controller to adjust one of the variable inlet restriction and the variable outlet restriction.

The present disclosure describes a hydroelectric control valve (HCV) for a fluid pipeline including an inlet and outlet (or input and output) section attached to the same pipeline wherein fluid flows into and out of the HCV comprising a bell reservoir section and a seat reservoir section which are both capped, where the bell reservoir section and the seat reservoir section are aligned with each other and are also perpendicular to fluid flowing through the pipeline. A channel which can be electrically activated and thus controlled is attached to the bell section, such that the bell reservoir section includes a bell relief channel in fluid communication with an outlet section and also a separate hydraulic poppet channel in communication with a locating needle head. In addition, turbine and deactivation channels are employed such that the deactivation channel connects the input section and the seat reservoir.

A valve (100) for controlling pressure in a ventilation system. The valve includes an electromagnet (105, 106), a shaft (107) connected to the electromagnet, and a diaphragm (110) connected to the shaft, wherein the electromagnet applies force to the diaphragm based on an input. The ventilation system includes a ventilator (200) connected to a patient circuit (204), the valve (100) controlling pressure in the ventilation system, and a controller (206) connected to the valve and configured to provide the input to the valve.

An apparatus that includes a chemical-injection management system. The chemical-injection management system may include a tree interface configured to couple the chemical-injection management system to a tree and a positive-displacement flow meter.

Methods and apparatus for in-situ calibration of a flow controller are provided herein. In some embodiments, a method of flowing a gas includes providing a flow controller configured to provide a first gas at a first value of a flow rate based on a calculated first relationship determined by using a standard gas; determining an actual first relationship between the flow rate and the setpoint for the first gas from a plurality of values of the flow rate of the first gas determined at a corresponding plurality of values of the setpoint of the flow controller, wherein each of the plurality of values of the flow rate is determined from flowing the first gas through the flow controller at corresponding ones of the plurality of values for the setpoint; and flowing the first gas at the first value of the flow rate based on the actual first relationship.