Rotameter principle pdf merge

This chapter discusses the matching, merging and data duplication features of oracle warehouse builder. It belongs to a class of meters called variable area meters, which measure flow rate by allowing the crosssectional area the fluid travels through to vary, causing a measurable effect. The float is raised according to the flow rate, leaving a certain gap between it and the tubs wall. In certain applications, a manual reset feature is desirable. A rotameter is a device that measures the flow rate of liquid or gas in a closed tube. Rotameter floats design on the performance of a rotameter. Basics of differential flow devices venturi tubes, orifice plates, and flow nozzles duration. The rotameters operation is based on the variable area principle. Rotameters, velocity flowmeters, and electromagnetic flowmeters have the advantage that they can be used with a. It is a variable area meter which works on the principle of upthurst force exerted by fluid and force of gravity. Measurement principle a float is installed in a vertical tube whose diameter gradually widens towards the top. The measured substance flows vertically around the float. A device used to measure fluid flow, in which a float rises in a tapered vertical tube to a height dependent on the rate of flow through the tube. Variable area flowmeter rotameter the original insatech.

Flow meter is a device that measures the rate of flow or quantity of a. Glass tube rotameter eureka variable area flow meters rotameters work on the principle of variable area. Theory and calibration procedures for the use of a rotameter. The working principle construction, calibration etc. Prepare the instruments such that the water passes sudden enlargement, thenventuri meter, orifice plate, elbow, and finally rotameter. It is an experiment used to measure the volume flow rate. Rotameter working principle animation instrumentationtools. An orifice flow meter is the most common head type flow measuring device. The dk32 flowmeter features horizontal connections and a standard bottom or top needle valve.

The operating principal is based on the bernoulli equation and the continuity equation of fluid flow. About matching and merging in oracle warehouse builder. The rotameter variable area flowmeter is one of the oldest and mature principles in flow measurement. Switch the pump on, allow the water to enter the flow measurement instruments,which are connected to manometers tubes. Pdf investigation of flow in a rotameter researchgate. From the experiments it is concluded that position of float remains same for the small change in flow rate of water and performance of rotameter directly depends on the float design and drag force offered on the float. Simple, lowcost measuring principle without auxiliary power. It belongs to a class of meters called variable area meters, which measure flow rate by allowing the crosssectional area the fluid travels through, to vary, causing a measurable effect. Pdf the float motion mathematical model is established based on the theory. The float takes up a position where buoyancy forces and the float weight are balanced in proportion to flow rate.

Under a constant flow rate, the position of the float stabilizes. When there is mass flow, there is some twisting of the tubes. The float moves freely up and down in the tapered borosilicate glass tube with fluid flow from bottom to top. The variety in cones, floats and scales combine to make the. A rotameter is a device that measures the volumetric flow rate of fluid in a closed tube. Introduction to pipe flow measurement the process piping.

This mechanical principle is as simple as it is reliable. Combining these equations we can find the relationship between the. Combining the foregoing equations and manipulating, we get the relation for flow of. The rotameter principle is one of the oldest and mature principles in flow measurement.