Orifice Flow Meters Orifice flow meters are the most popular liquid flow meters in use today. An orifice is simply a flat piece of metal with a specific-sized hole bored in it. Most orifices in use are of the concentric type, but eccentric, conical (quadrant), and segmental designs are ...
Differential pressure flow meters calculate flow by measuring pressure drop over an obstruction inserted in the flow path. Common types of flow elements are orifice plates, flow nozzles, venturi tubes, and averaging pitot tubes. Theorificeplateis a differential pressure meter frequently used for natur...
One of the considerations regarding the use of aflow meteris the type of flow, which can be open channel or closed conduit. Open channel flow is open to the atmosphere and is a channel, weir, or flume while closed conduit flow is in a tube or pipe. ...
In horizontal lines carrying vapours, water (or condensate) can build up against the upstream face of the orifice. To prevent this, a drain hole may be drilled in the plate at the bottom of the pipe. Clearly, the effect of this must be taken into account when the orifice plate dimensions...
Common types of differential pressure flow meters are: Orifice Plates Flow Nozzles Venturi Tubes Variable Area - Rotameters . Orifice Plate With an orifice plate, the fluid flow is measured through the difference in pressure from the upstream side to the downstream side of a partially obstructed...
There are three main types of indirect mass flow meters: a combination of a speed flow meter and a densitometer, a combination of a throttle (or target) flow meter and a volumetric flow meter, and a throttle (or target) flow meter. Densitometer combination....
Types of RotametersRotameters can be adapted to be used for a particular application.Orifice bypass - Rotameters can be installed in a bypass line around an orifice plate to handle larger flow rates. The differential pressure in the liquid or gas (caused by the orifice plate) creates a ...
These results show shifts in orifice meter discharge coefficients that are both positive and negative depending upon pertinent conditions. A range of orifice geometries, Reynolds numbers and meter locations are studied and explanations are put forth to explain these shifts. Results are also presented ...
Differential pressure flowmeter is composed of a primary element (detection part) and a secondary device (differential pressure transmitter and flow display instrument). Differential pressure flowmeters are usually classified by the type of detection parts, such as orifice flowmeters, venturi flowmeters,...
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