Abstract

The invention provides an apparatus and method for measuring fluid flow rates. The apparatus comprises a meter body comprising a throughbore with a fluid flow path and a flow displacement member. The apparatus also provides a sleeve slidably mounted within the fluid flow path. The sleeve is configured to be movable between at least two axial positions within the fluid flow path to select a predetermined flow rate measurement range for the flow measurement apparatus.

IPC Classes  ?

• G01F 1/22 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow by variable-area meters
• G01F 1/26 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow by variable-area meters of the valve type
• G01F 1/34 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
• G01F 1/44 - Venturi tubes
• G01F 15/00 - Details of, or accessories for, apparatus of groups insofar as such details or appliances are not adapted to particular types of such apparatus
• G01F 1/32 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
• G01F 1/42 - Orifices or nozzles
• G01F 1/46 - Pitot tubes
• G01F 1/56 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
• G01F 1/58 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
• G01F 1/66 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
• G01F 1/68 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
• G01F 1/84 - Coriolis or gyroscopic mass flowmeters
• G01F 1/90 - Indirect mass flowmeters, e.g. measuring volume flow and density, temperature, or pressure with positive-displacement meter or turbine meter to determine the volume flow