Why should I prefer Venturimeter over an Orificemeter?

The Venturi meter can handle large range of flow rates of fluid than the Orifice meter but once the Venturi meter is installed the range of flow rates it can handle becomes fixed.

Why is Venturimeter preferred over orifice plate?

In the venturi meter, there is a gradual contraction between the inlet and throat because of that the head loss is less in the case of the venturi meter. In the orifice meter there is a sudden contraction of the area between inlet and throat because of that there is more loss of head in the case of the orifice meter.

Which is better Orificemeter or Venturimeter?

The pressure loss in venturi meter is 10% while in the orifice meter the pressure loss is 50-60%. The coefficient of discharge in the venturi meter is 0.98 while in orifice meter it is 0.6. The turn down ratio of venturi meter is 10:1 while in orifice meter it is 5:1.

What are the advantages of Venturimeter over orifice meter?

Advantages of Venturi mater over Orifice meter :

Venturi meter is used for operating in-compressible fluids. Venturi meter can handle large range of flow rates of fluid than that of orifice meter. Turn down ratio is 10 : 1. Co-efficient of discharge is relatively high 0.98.

What is the advantage which prefers Venturi over orifice?

Advantages of venturi meter:

Its behaviour can be predicted perfectly. It can be installed vertically, horizontally, inclined. They are more precise and can be used for a wide range of flows. About 90% of the pressure drop can be recovered.

The fixed orifice expansion device

What are the advantages and disadvantages of Orificemeter?

Is Venturimeter more accurate than orifice meter?

The Orificemeter readings are more accurate than Venturimeter.

How accurate is a Venturi meter?

Note that by default, Venturi flow meters offer an accuracy of around ±1% of the discharge coefficient. Optimum calibration allows an even greater accuracy of up to ±0.25%. Venturi nozzle flow rate measurement systems are marginally more expensive than orifice-style flow meter systems.

Why is flow nozzle and venturi tube more accurate than orifice plate?

The velocity vector of fluid must be perpendicular to the orifice plate for lower pressure loss and better accuracy in measurement of average velocity or flow rate or the flowing fluid.

What is the use of Orificemeter?

The simplest and most common device for measuring flow rate in a pipe is an orifice meter. An orifice meter is a device with a hole in it, which measures how fast a fluid is flowing, by recording the pressure decrease across the hole.

What is the advantage and disadvantage of venturi meter?

Advantages and disadvantages of Venturi meter

Smooth construction and low cone angle help to solid particles flow through it. So it can be used for dirty fluids. It can be installed in any direction horizontal, vertical and inclined. More accurate than orifice and flow nozzle.

How Orificemeter are used for flow measuring?

It works on the Differential Pressure Measurement principle. The liquid or gas whose flow rate is to be determined is passed through the orifice plate. This creates a pressure drop across the orifice plate which varies with the flow rate, resulting in a differential pressure between the outlet and inlet segments.

Does a Venturi increase pressure?

A Venturi is a system for speeding the flow of the fluid, by constricting it in a cone shape tube. In the restriction the fluid must increase its velocity reducing its pressure and producing a partial vacuum. As the fluid leave the constriction, its pressure increase back to the ambient or pipe level.

Why does Venturi reduce pressure?

The Venturi effect states that in a situation with constant mechanical energy, the velocity of a fluid passing through a constricted area will increase and its static pressure will decrease. The effect utilizes both the principle of continuity as well as the principle of conservation of mechanical energy.

Why does air speed up in a Venturi?

The Venturi meter demonstrator shows how fluid pressure is reduced when it flows through a constricted section of tubing. It uses Bernoullii's Principle, which states that air/fluid flows faster in the constricted section.

Does a Venturi increase flow rate?

Venturi Meter or Venturi Tube

the higher the pressure difference (the lower p2), the higher the flow rate. the flow rate can be increased by decreasing the fluid density.

Which of the following is measured with the help of Orificemeter *?

Explanation: An Orifice meter is a device used to measure the rate of flow of a fluid through a pipe.

Which is the cheapest device for measuring flow discharge rate?

Explanation: Orificemeter is the cheapest available device for measuring flow/discharge rate.

Which type of flow takes place in a Venturimeter?

Venturiflume is also known as throat flume and is used for measurement of flow in streams, small channels etc. As the flow takes place in an open channel so the pressure of the flow is atmospheric pressure.

Why venturi tube has low permanent pressure loss as compared to the orifice plate?

Compare Venturi and Orifice

The orifice meter has a large permanent loss of pressure because of the presence of eddies on the downstream side of the orifice-plate; the shape of the venturi meter prevents the formation of these eddies and greatly reduces the permanent loss. The orifice is cheap and easy to install.

When would you use a Venturi flow meter?

It has often been used to measure high flowrates of superheated steam. The flow nozzle, like the venturi, has a greater flow capacity than the orifice plate and requires a lower initial investment than a venturi tube, but also provides less pressure recovery (Figure 1).