The present disclosure relates to a crude oil flow metering device, which includes a measuring part and a metering part; the measuring part includes a measuring tube and a float assembly; the float assembly is in-built in the measuring tube, and includes a float and a float connection rod integrally connected with the float; an end of the float connection rod is connected to a detection part; the detection part protrudes out of the measuring tube when the float rises from a bottom end; the metering part includes a position detection module and a processing module; the position detection module is arranged in a detection cavity located above the measuring tube and formed by a first housing; when the detection part at the end of the float connection rod extends into the detection cavity, the position detection module detects a position of the detection part at the end of the float connection rod to obtain a float height detection signal; and the processing module calculates a flow rate of measured crude oil according to the float height detection signal. The present disclosure can safely meter the crude oil flow of a crude oil transport pipeline and meet the accuracy of metering crude oil.

To make it possible to incorporate a fluid resistance element into a flow path through which a fluid flows without difficulty while enjoying advantages from forming a resistance flow path using ceramic, provided is a fluid resistance element including: a ceramic flow path forming member having one or a plurality of resistance flow paths; and a metal covering member covering an outer peripheral face of the flow path forming member.

In order to prevent unnatural behavior of a calculated flow rate, provided is a fluid control device in which a fluid control valve and upstream and downstream pressure sensors are provided on a flow path. The device includes a calculation unit configured to calculate a flow rate based on measured pressures; and an output unit configured to output the calculated flow rate, and exhibit a zero output function of outputting a zero value regardless of the calculated flow rate when the valve is in a closed state. The device is further configured to switch between execution and stop of the zero output function, and when the valve is in an open state and a difference between the measured pressures of the pressure sensors is larger than a threshold, stop the zero output function and cause the flow rate output unit to output the calculated flow rate.

A system for measuring a velocity or volumetric fluid flow rate of a fluid flow passing within a pipe includes a SONAR flow meter configured to determine a measured velocity or volumetric rate of a fluid flow passing within a pipe. The system further includes a CFD analysis device configured to produce a simulated velocity or volumetric rate of the fluid flow passing within the pipe. The system further includes a processing unit in communication with the CFD analysis device and the SONAR flow meter. The processing unit is configured to produce at least one error function based on the measured velocity or volumetric fluid flow rate and the simulated velocity or volumetric fluid flow rate, and is configured to determine an adjusted velocity or volumetric fluid flow rate using the at least one error function and the measured velocity or volumetric fluid flow rate.

A fluid flow rate sensor, which may also be the basis of a valve for a fire suppression system, uses a sensing arm to convey motion of an obturation body or a valve closing member to a sensor system which evaluates the motion and generates a calibrated measure of the flow rate and/or an alarm signal in response if warranted. The obturation body and the valve closing member are capable of both rotation and translational motion, both of which are sensed using the sensing arm. The sensor system is isolated from the fluid within the valve.

A water management system effective for managing and metering water usage and detecting and reducing water leaks is described herein. The water management system can detect a leak when a volume of water flow or change in water pressure detected by a water meter of the system is uncharacteristic for a given day and time of day at the node. Upon detecting the leak, the system alerts the user, and in some situations, remotely shuts off a water supply to preemptively address a water leakage issue.

An example valve includes: a plurality of ports comprising: a first port, a second port, and a third port; a spool configured to block fluid flow from the first port to the third port while allowing fluid flow from the third port to the second port when the valve is in an unactuated state; a spring applying a biasing force on the spool in a proximal direction, wherein when the valve is actuated, the spool moves in a distal direction against the spring, thereby allowing fluid flow from the first port to the third port while blocking fluid flow from the third port to the second port; and a turbine configured to rotate as fluid flows from the first port to the third port when the valve is in an actuated state.

Included are mass flow controllers and methods of use. An example mass flow controller comprises a flow pathway through the mass flow controller; the flow pathway comprising a first cavity and a second cavity. The mass flow controller further comprises a laminar flow element. The mass flow controller additionally comprises a combination absolute and differential pressure transducer assembly comprising: a third cavity in fluid communication with the first cavity, an absolute pressure transducer exposed to absolute pressure in the third cavity, and a differential pressure transducer exposed to differential pressure between the third cavity and the second cavity. The mass flow controller also comprises a flow control valve assembly downstream of the laminar flow element and the combination absolute and differential pressure transducer assembly.

The abnormality detection method of the flow rate control device 10 is performed in the gas supply system 100 including the flow rate control device 10 having the restriction part 12, the control valve 14, the flow rate control pressure sensor 16 for measuring the upstream pressure P1, and the control circuit 19, the inflow pressure sensor 20 for measuring the supply pressure P0, and the upstream on-off valve 2 provided upstream of the inflow pressure sensor, and includes a step of closing the upstream on-off valve in a state in which the gas flows at the controlled flow rate at the downstream of the restriction part by controlling the opening degree of the control valve based on the output of the flow rate control pressure sensor, a step of measuring the drop in the supply pressure P0 on the upstream side of the control valve after closing the upstream on-off valve while keeping the control valve open, and a step of detecting the presence or absence of abnormality in the flow rate control device based on the measured supply pressure drop.

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.