What is venturi meter and orifice meter?

Venturimeter:- This instrument is used for flow rate measurement

measurement

measure; a measuring. (by extension) a standard or measure by which something is measured. (figuratively) a quantity or amount.

https://en.wiktionary.org › wiki › mensura

mensura - Wiktionary

consist of converging and diverging sections with the throat. Orifice meter:- An orifice meter is equipment that is used to measure the flow rate of liquid

liquid

A liquid is made up of tiny vibrating particles of matter, such as atoms, held together by intermolecular bonds. Like a gas, a liquid is able to flow and take the shape of a container. Most liquids resist compression, although others can be compressed.

https://en.wikipedia.org › wiki › Liquid

Liquid - Wikipedia

by using the restriction to the flow known as an orifice plate.

What is Venturi and orifice meter?

Venturi Meter versus Orifice Meter:- Venturi meters and Orifice meters are devices which are used to measure average velocity, volumetric flow rate or mass flow rate of a flowing fluid by reducing the pressure of the flowing fluid.

What are venturi meter and orifice plate meters used for?

3. Orifice plates and venturimeters are called as volumetric flow detectors as they measure the volume of flow rate. Mass flow rates can be calculated by measuring temperature and pressure. 4.

What is meant by orifice meter?

An orifice meter is a device with a hole in it that measures how fast a fluid is flowing by recording the pressure decrease across the hole. The two most important factors that influence the reading of an orifice meter are the size of the orifice and the diameter of the pipe which it is fitted into.

What is difference between orifice and orifice meter?

In the matter of design, orifice for flow meter always designed to flow in a subsonic velocity in order to ensure the accuracy of flow measurement, while the restriction orifice always designed to flow in the sonic velocity to ensure choked flow. Indeed RO main function is to limit the flow (flow-limiting).

Fluid Power Flow Measurement Venturi vs Orifice Meter

What is Venturimeter used for?

A Venturi Meter is mainly used to estimate the rate of flow of liquid through a pipe by decreasing the cross-sectional area and creating a gradient of pressure. Hence, a Venturi meter is used to measure the rate of flow of fluid flowing through a pipe.

Where is orifice meter used?

The orifice plate flow meter is a type of differential pressure flow meter that is commonly used in clean liquid, gas, and stream mass flow measurement.

What is Venturimeter and orifice plate?

Venturimeter:- This instrument is used for flow rate measurement consist of converging and diverging sections with the throat. Orifice meter:- An orifice meter is equipment that is used to measure the flow rate of liquid by using the restriction to the flow known as an orifice plate.

How does a orifice work?

Orifice plates are a primary flow element, detecting the flow of a fluid passing through the plate by sensing the pressure drop across the plate. When a fluid flows through a restriction in a pipe, it creates a pressure difference between upstream and downstream of the restriction.

Why orifice plate is used?

An orifice plate is a device used for measuring flow rate, for reducing pressure or for restricting flow (in the latter two cases it is often called a restriction plate ).

What are the types of orifice?

Which is better orifice or Venturi?

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.

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.

What does Bernoulli's principle state?

Explain that the Bernoulli Principle states that slower moving fluids create greater pressure (force) than faster moving fluids.

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.

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.

Which is the main advantage of orifice meter?

Advantages of Orifice meter:

The Orifice is small plates and easy to install/remove. Offer very little pressure drop from which 60% to 65% is recovered. The orifice meter can be easily maintained. Measures a wide range of flows.

What are the advantages of venturimeter?

What is notch and weir?

A notch is an opening in the side of a measuring tank or reservoir extending above the free surface. A weir is a notch on a large scale, used, for example, to measure the flow of a river, and may be sharp edged or have a substantial breadth in the direction of flow.

What is orifice and its type?

Orifice is defined as the small opening on side or bottom of a tank through which any kind of fluid is flowing. The opening can be of circular, triangular or rectangular in cross section and they are named on the basis of shape accordingly. Orifices are mainly used for measuring the rate of fluid flow.

What is orifice size?

The orifice diameter is the internal opening of the valve and is used to calculate the flow capacity of the valve. Metric or English makes no difference. It's the inside hole. The inlet size is the interface or the size/type of the threads where you attach the valve.

How do Venturi flow meters work?

A venturi works by measuring the difference in pressure at two different locations. The pressure difference is created by reducing the diameter of the pipe causing the fluid to flow faster. The fast moving fluid has a lower pressure than the slower fluid in the larger section of the venturi.

Why is beta ratio important?

The differential pressure generated is related to the beta ratio of the orifice plate. The smaller the beta ratio, the higher the differential pressure generated. In practice, the choice of beta ratio is a compromise between the differential pressure desired and the flow rate required.

How is flow measured?

Flow is the volume of fluid that passes in a unit of time. In water resources, flow is often measured in units of cubic feet per second (cfs), cubic meters per second (cms), gallons per minute (gpm), or other various units.