There is no difference b/w a rotameter & a flow meter because these two terms are utilized interchangeably. Difference b/w Rotameter vs Flow MeterĪ rotameter is a flow meter used to measure the volumetric flow of fluids & gases. An example of a Glass tube rotameter is 10A2235 which is available with a hollow bronze body, unique piping arrangements & NPT threads. Glass Tube RotameterĪ glass tube rotameter is mainly used to shut down the heavy equipment automatically once the bearing lubricant supply becomes very low, electrical equipment shuts down once the flow of cool water drops under a fixed limit. The Glass tube purge meter example is 10A6130 which includes a protective shield, needle valve & ball check valve at the inlet otherwise outlet. The burgomaster is outstanding for liquid sampling, specific gravity, measurements of its level & other less flow of gases & liquids applications. Glass tube purge rotameters are suitable for low flow rate applications like instrument enclosures & purging control lines. These devices are also available as a PTFE lined meter, metal tube meter otherwise a heat traced meter used for fluids that respond to temperature. It can be used with transmitter, optional alarms, HART communications, totalized pulse output & configurable digital display. ![]() These rotameters are very helpful in measuring the opaque, aggressive & non-conductive liquids usually in petrochemical, chemical, pharmaceutical-based industries within high-pressure-based applications.Īn example of the flanged armored type is FAM54 including flanged connections. So it is applicable mostly in high-pressure-based applications. The flanged armoured rotameter is used within automated systems wherever the applications need quite opaque fluids at forceful conditions. The 10A3200 is an example of armoured purge meter, available with NPT threads & needle valve option. These are used in various sampling systems, gas analyzer systems, and where glass tubes are not suitable for safety reasons. This rotameter is used for high pressure, corrosive & low flow rate-based applications. The following parameters need to consider while selecting rotameters.Īrmoured purge meters can clean the liquid if the system condition is not good. When both the gravity & float weight are stable, then the distance float moved upward is relative to the flow velocity of the liquid which is flowing throughout the tapered tube. So the float will discover equilibrium once the area in the region of float produces sufficient drag which is equivalent to weight. After some time, the flowing region achieves a position wherever the force induced on the floating body accurately matches the float’s weight. The flow of liquid pushes the float up from gravity. So, the float in the rotameter experiences two forces in the reverse direction, the gravitational force is a downside, and the drag force is on the upside. In a rotameter, liquid flows from the base of the tapered tube, after that some of the liquid directly hits the bottom of the float & the remaining liquid will flow away from the float. ![]() Rotameters are connected vertically always in the pipelines and a scale is available on the tube to check the flow rate values directly. At both ends of the device, nets are arranged through a pipeline using flanged connections. It includes a float and a tapered tube where the float is arranged within the tapered tube.Transmitters are very helpful in recording the flow measurements precisely as compared to we observer on the scale directly.The scale on this meter displays the flow measurements by showing with float.The float is used to indicate the rate of flow of liquid within the tube, which can be designed with plastic, glass, or metal. A float is a small device within the tube of a rotameter with precise dimensions.This transparent tube is very helpful in observing the measurements directly. In the construction, the shape of the transparent tube is conical which includes a scale and floats within it.The rotameter construction can be done by using different components like transparent tube, scale, float, and transmitter. Once the liquid supplies throughout the tube then its cross-sectional region will become higher. Rotameters’ working principle is to measure the flow rate of liquid because the liquid supplies throughout a tapered tube.
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