A positive displacement flowmeter as a mechanical flow meter is a common type of Volumetric Flow Meter. It can measure the volume flow of high viscosity and corrosive fluids.
Sino-Inst offers a variety of Oval Gear Flow Meters for flow measurement. If you have any questions, please contact our sales engineers.
Featured Volumetric Flow Meters
Volumetric flow meter working principle
The positive displacement flow meter is a flow meter that uses mechanical measuring elements to continuously divide the fluid into a single known volume, and repeatedly fill and discharge the volume of fluid to accumulate the total amount of fluid.
Volumetric flow measurement uses a fixed small volume to repeatedly measure the volume of fluid passing through the flowmeter.
Therefore, there must be a standard volume of space inside the positive displacement flowmeter, which is usually called the “metering space” or “metering chamber” of the positive displacement flowmeter.
This space is formed by the inner wall of the instrument case and the rotating parts of the flowmeter.
The working principle of a positive displacement flow meter is: fluid passing through the flow meter will produce a certain pressure difference between the inlet and outlet of the flow meter.
The rotating part of the flowmeter (referred to as the rotor) rotates under the action of this pressure difference, and discharges the fluid from the inlet to the outlet.
In this process, the fluid fills the “metering space” of the flowmeter again and again, and then is continuously sent to the outlet.
Under the conditions of a given flow meter, the volume of the metering space is determined. As long as the number of rotations of the rotor is measured, the cumulative value of the volume of fluid passing through the flow meter can be obtained. Flow rate of viscous fluids such as oils, condensate, resin and liquid food.
For the flow of high-viscosity media, other flowmeters are difficult to measure, but positive displacement flowmeters can accurately measure with an accuracy of ±0.2%.
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How to convert Mass Flow Rate & Volumetric Flow Rate
- If the mass flow of the flow is known and needs to be converted into volume flow, the following formula can be used: qv=qm/ρ. In the formula, qv is volume flow, m3/s. qm is mass flow, kg/s. ρ is fluid Density, kg/m3.
- If the volume flow rate of the fluid is known, it needs to be converted into a mass flow rate, which can be done with the formula: qm=qv×ρ.
We provide you with some calculation tools for Mass Flow Rate & Volumetric Flow Rate conversion:
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Sino-Inst, Manufacuturer for Volumetric Flow Meters. For example: crude oil flowmeter, diesel flowmeter, gasoline flowmeter.
Sino-Inst’s Volumetric Flow Meters, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.
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What is Volumetric Flow Meter? How it works? Vs Mass Flow
A volumetric flow meter is an instrument that can measure the volume of fluid passing through the measurement location within a set period of time.
Product SKU: Volumetric Flow Meters
Product Brand: Sino-Inst
Product Currency: USD
Product Price: 500
Price Valid Until: 2059-09-30
Product In-Stock: PreOrder