venturi flow meter pdf
1 the flow is cyclonic or swirling. It still does have a certain amount of pressure drop but it is significantly less than the orifice type meter.
Venturi Principle How Do Venturis Work
A common device for flow measurement is the convergent-divergent nozzle or Venturi meter Fig.
. Fire service 312 80300 SMALL FLOWS. Pressure recovery is low. Disadvantages of flow Nozzle.
Direct Mass Flow Thermal Mass flow meters measure the mass flow based on heat transfer from a heated element flare gas application with the Sage Paramount. 22 21 1 2 PVρ ρV. Or 2 a stack is smaller than 030 meter 12 in in diameter or 0071 m.
Added Text box at the bottom of the. It is mainly used for robust applications as it is known for its durability and is very economical. AGA8 option for Natural Gas in Flow Elements.
Bolts should not be over-torqued. The flow direction arrow in the venturi meter should be checked and installed to agree with the direction of the flow. Articles You May Like.
Click on the image to download the PDF. As the name implies it consists of an Orifice Plate which is the basic element of the instrument. Standard compound 28 50200 B.
Installation is easy and is cheaper when compared to venturi meter. Venturi flow nozzle flow tube 284 502100 Pitot tube Unlimited Variable opening fixed differential rotameter ¼4 6100 C. Mass flow meters determine mass flow passing through the meter.
The venturi flow meter while considered an obstruction flow meter is less of an obstruction than the orifice type. An Orifice Meter is basically a type of flow meter used to measure the rate of flow of Liquid or Gas especially Steam using the Differential Pressure Measurement principle. Coriolis flowmeters provide a direct mass.
Electronic velocity electromagnetic ¹₁₀72 21800 Ultrasonic ½72 131800 d. Added option to specify outlet pressure of orifice Flow Element. Has high coefficient of discharge.
The magnitude of cyclonic flow of effluent gas in a stack or duct is the only parameter quantitatively measured in the simplified procedure. Pressure taps should be oriented. Fluid mechanics 146 13 Fatigue and stress concentration 17 41 Hydrostatics 146 14 Bending of beams 24 42 Flow of liquids in pipes and ducts 148 15 Springs 32 43 Flow of liquids through various devices 152 16 Shafts 38 44 Viscosity and laminar flow 155 17 Struts 46 45 Fluid jets 157 18 Cylinders and hollow spheres 48 46 Flow of gases 160 19 Contact stress 51 47 Fluid.
Installation is difficult when compared to orifice flow meter. Two types deserve mention here. This method cannot be used when.
Installation tolerances should be within industry standards. This method is applicable to gas streams flowing in ducts stacks and flues. Technique for showing cavitation in restriction orifices and venturi meters Flow Elements Expanded vortex meter sizes available up to size 36 Flow Elements Incorporation of Z-factor in gas-flow for sizing Flow Elements.
Once again as long as the incompressible fluid velocity is well below the supersonic point mach 3 the Bernoulli equation can be used. Pipe Support should not be placed on venturi meters. Level measurement Weir Parshall flume etc.
It is very compact. This device involves the contraction of the fluid and subsequent expansion. In comparison to other flow measurement devices such as an orifice plate the smooth contraction and expansion does not cause a significant pressure loss as fluid streamlines are able to conform.
Flanges at the venturi meter ends should be properly aligned with the piping flanges.
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