cylinderprover

A cylinder prover is a metrological device used for the precise calibration of volumetric flow meters, particularly those installed in pipelines such as turbine meters, positive displacement meters, and ultrasonic meters. Its operation is based on the principle of displacing a known, accurately measured volume of fluid. The prover consists of a cylinder with two piston assemblies. As the fluid flows through the prover, it pushes one piston, which in turn moves a precisely machined displacer element along the length of the cylinder. The volume displaced by the movement of this element is a fixed, known quantity. The flow meter being calibrated is installed in the same pipeline, and its indicated volume during the passage of the displacer is compared to the known volume of the prover. This comparison allows for the determination of the meter's accuracy and the calculation of a calibration factor. Cylinder provers are constructed to stringent manufacturing tolerances to ensure the accuracy of the displaced volume. They are commonly used in industries such as oil and gas, petrochemicals, and water management where accurate custody transfer of fluids is critical. Regular calibration and maintenance of cylinder provers are essential to maintain their metrological integrity.