What is Positive Displacement Flow Metres and Its Applications?

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What is Positive Displacement Flow Metres and Its
Applications?
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Positive displacement flow metres are devices
used to measure the volume of fluid flowing
through a pipeline or channel by dividing it into
measured segments. These metres are among the
most popular and accurate flow measurement
devices in use today. Positive displacement flow
metres measure the quantity of fluid that flows
through a pipe or duct by dividing it into
measurable units. This blog post will explore
positive displacement flow metres and their
various applications.
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What is Positive Displacement Flow? Positive
displacement flow refers to a type of flow where
the volume of fluid that flows through a pipe or
channel is determined by the movement of a
piston, gear, or other mechanical component. As
fluid moves through the metre, the movement of
these mechanical components creates measurable
units of fluid, which can be counted to determine
the total volume of fluid that has flowed through
the metre.
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Types of Positive Displacement Flow Metres There
are several types of positive displacement flow
metres. These include Piston Metres Piston
metres are widely used in the oil and gas
industry for measuring the flow of petroleum
products such as crude oil, gasoline, and diesel
fuel. They are also used in the food and beverage
industry for measuring the flow of liquids such
as milk and fruit juices. Piston metres are
capable of measuring both high and low flow rates
accurately, making them ideal for applications
where precise measurements are necessary. One of
the key advantages of piston metres is their
ability to maintain accuracy over a wide range of
flow rates. They are also highly precise, with
the ability to measure fluid flow within a very
narrow range of tolerance. Piston metres are
durable and can withstand harsh operating
conditions, including high temperatures,
pressure, and corrosive fluids.
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Oval Gear Metres Oval gear metres are commonly
used in applications where high accuracy is
required. These types of flow metres have a
simple design and can be used to measure a wide
range of fluids, including corrosive and viscous
fluids. The gears in oval gear metres are
typically made of materials such as stainless
steel, PTFE, or other suitable materials that can
withstand the properties of the fluid being
measured. One of the advantages of oval gear
metres is their ability to maintain their
accuracy over a wide range of flow rates, making
them ideal for measuring the flow of fluids that
vary in viscosity. Oval gear metres are also
capable of measuring flow in both directions,
which can be useful in some applications.
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Nutating Disc Metres Nutating disc metres use a
disc that is mounted on a central ball that is
offset from the centre. As the fluid flows
through the metre, the disc wobbles or nutates.
The wobbling motion of the disc creates a space
between the disc and the metre body, which varies
in size with the flow rate. The volume of fluid
that passes through the metre is measured by
counting the number of disc wobbles and
multiplying it by the known volume of each
wobble. Nutating disc metres are highly accurate
and can be used to measure a wide range of
fluids, including those with low viscosity. They
are commonly used in industrial and commercial
applications where precise measurement is
required.
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Rotary Vane Metres Rotary vane metres consist of
a rotor with blades that rotate as fluid flows
through the metre. The blades are slightly
offset, which creates a chamber for the fluid to
flow through. As the fluid passes through the
chamber, it causes the rotor to rotate, which in
turn creates measurable units of fluid. Rotary
vane metres are known for their high accuracy and
wide flow range. They are often used in
applications where precision and accuracy are
critical, such as the measurement of fuels,
chemicals, and food products. The simple design
of rotary vane metres also makes them easy to
maintain and repair.
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How Do Positive Displacement Flow Metres
Work? Positive displacement flow metres work by
dividing the fluid flowing through a pipeline or
channel into measurable segments. As fluid moves
through the metre, it creates mechanical movement
that is measured by the metre. The metre then
records the number of segments created and
calculates the volume of fluid that has flowed
through the metre.
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What are the Applications of Flow
Metre? Positive displacement flow metres are
used in a wide range of applications in various
industries, including Petroleum
Industry Positive displacement flow metres are
commonly used in the petroleum industry to
measure the volume of crude oil, gasoline, and
other petroleum products flowing through
pipelines. Food and Beverage Industry Positive
displacement flow metres are used in the food and
beverage industry to measure the volume of liquid
ingredients, such as milk, fruit juice, and beer,
that are used in the production of various food
and beverage products.
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Chemical Industry Positive displacement flow
metres are used in the chemical industry to
measure the volume of chemicals flowing through
pipelines during the manufacturing
process. Pharmaceutical Industry Positive
displacement flow metres are used in the
pharmaceutical industry to measure the volume of
liquid ingredients used in the production of
various drugs and medications.
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Conclusion Positive displacement flow metres
have proven to be an indispensable tool in
various industrial applications, including
chemical processing, food and beverage
production, and pharmaceutical manufacturing, to
name a few. The ability of these metres to
accurately measure and control fluid flow makes
them crucial for ensuring product quality and
consistency as well as optimising production
efficiency. As technology continues to advance,
we can expect to see more innovations in positive
displacement flow metre design and functionality,
further expanding their applications and
capabilities. IDEX India is a trusted
manufacturer of liquid handling solutions,
including positive displacement flow metres. With
its commitment to quality, reliability, and
innovation, IDEX India has established itself as
a leader in the fluid handling industry. Their
positive displacement flow metres are designed to
meet the demanding needs of a wide range of
applications and industries, delivering accurate
and precise flow measurement in even the harshest
operating conditions. Whether for industrial or
commercial use, IDEX India's positive
displacement flow metres offer the accuracy,
reliability, and durability needed for optimal
performance and productivity.
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