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The Discharge Through Venturimeter, Orificemeter & Rotameter apparatus is an important experimental setup used in fluid mechanics and hydraulic engineering laboratories to study and compare different flow measurement devices. Accurate measurement of fluid flow rate is a fundamental requirement in engineering applications such as water supply systems, pipelines, chemical processing plants, power stations, and HVAC systems.
This combined experimental setup allows students to understand the working principles, advantages, limitations, and performance of three widely used flow measuring devices under the same operating conditions. By conducting experiments on venturimeter, orificemeter, and rotameter, learners gain comprehensive practical exposure to flow measurement techniques used in real-world engineering systems.
Importance of Flow Measurement in Engineering
Flow measurement is essential for controlling and optimizing fluid systems. Engineers rely on accurate flow data to ensure efficiency, safety, and reliability. Different flow meters are selected based on factors such as accuracy, pressure loss, cost, and application.
The Discharge Through Venturimeter, Orificemeter & Rotameter test rig helps students understand why multiple flow measurement devices exist and how their performance differs under identical flow conditions.
Overview of Venturimeter, Orificemeter & Rotameter
Venturimeter
A venturimeter is a differential pressure flow measuring device that works on Bernoulli’s principle. It consists of a converging section, throat, and diverging section. Due to smooth flow transition, it offers high accuracy and low head loss, making it suitable for large pipelines.
Orificemeter
An orificemeter consists of a thin plate with a sharp-edged hole installed in a pipeline. It is simple, economical, and easy to install but causes higher head loss compared to a venturimeter.
Rotameter
A rotameter is a variable area flow meter that works on the principle of balance between fluid force and gravity. It provides direct flow rate readings, making it user-friendly and widely used in laboratories and industries.
Objective of the Experiment
The main objectives of the Discharge Through Venturimeter, Orificemeter & Rotameter experiment are:
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To measure discharge through venturimeter, orificemeter, and rotameter
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To compare actual and theoretical discharge values
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To determine coefficients of discharge for venturimeter and orificemeter
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To study pressure variation and head loss
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To understand the working principle of rotameter
These objectives make the apparatus a vital part of the fluid mechanics laboratory curriculum.
Construction of the Apparatus
The test rig is designed for durability, accuracy, and ease of operation. The main components include:
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Strong mild steel or powder-coated frame
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Pipeline fitted with venturimeter and orificemeter
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Transparent rotameter with calibrated scale
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Pressure tapping points at required sections
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U-tube manometer or differential pressure gauge
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Centrifugal pump for water circulation
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Sump tank and measuring tank
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Flow control valves
The layout allows easy switching between flow meters and clear observation of readings.
Working Principle
The apparatus operates based on Bernoulli’s equation, continuity principle, and flow equilibrium concepts.
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Water is pumped from the sump tank through the pipeline.
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Flow is passed through the venturimeter, orificemeter, and rotameter.
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Pressure differences are measured across venturimeter and orificemeter.
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Actual discharge is measured using a collecting tank and stopwatch.
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Rotameter provides direct flow readings.
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Theoretical discharge is calculated using standard equations.
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Coefficients of discharge are determined and compared.
This systematic approach helps students clearly understand flow measurement fundamentals.
Experiments Performed
Using this apparatus, the following experiments can be conducted:
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Measurement of discharge through venturimeter
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Measurement of discharge through orificemeter
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Flow rate measurement using rotameter
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Determination of coefficient of discharge
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Comparison of flow meters based on accuracy and head loss
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Verification of Bernoulli’s theorem
These experiments are widely prescribed in mechanical and civil engineering syllabi.
Comparison of Flow Measuring Devices
Venturimeter
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High accuracy
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Low head loss
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Expensive and bulky
Orificemeter
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Simple and economical
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Easy installation
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High head loss
Rotameter
This comparative study helps students understand practical selection of flow meters.
Applications of the Apparatus
The Discharge Through Venturimeter, Orificemeter & Rotameter test rig is used in:
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Mechanical Engineering Laboratories
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Civil Engineering Laboratories
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Hydraulic and Fluid Mechanics Labs
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Polytechnic and Diploma Institutes
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Industrial Training Institutes (ITI)
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Research and Development Centers
It is also suitable for international universities and technical institutes.
Advantages of the Test Rig
Key advantages include:
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Three flow meters in one setup
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Accurate and repeatable results
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Compact and user-friendly design
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Strong construction for long-term use
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Ideal for demonstrations and exams
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Enhances practical understanding of flow measurement
These benefits make it a preferred choice for engineering laboratories.
Educational Importance
Understanding flow measurement devices is critical for engineers working in industries such as water supply, oil and gas, chemical processing, power generation, and HVAC systems. This apparatus provides hands-on exposure to devices commonly used in industry.
Students trained on this test rig gain confidence in applying theoretical equations to real engineering problems.
Why Choose Scilabstore for Flow Measurement Equipment
Scilabstore and scilabex.com are trusted suppliers of engineering laboratory and scientific equipment. With a strong reputation for quality and reliability, Scilabstore offers flow measurement test rigs that meet academic and international standards.
Key Reasons to Choose Scilabstore:
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Trusted laboratory equipment supplier
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Precision-engineered apparatus
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Suitable for Indian and international labs
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Durable construction and accurate instrumentation
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Professional technical support
Every unit is quality-checked before dispatch.
PAN India & International Delivery
Scilabstore provides PAN India delivery, supplying equipment to colleges and universities across India. The company also offers international delivery, exporting laboratory equipment to institutions worldwide.
Export-grade packaging and efficient logistics ensure safe and timely delivery globally.
Quality Standards and Reliability
The apparatus is manufactured under strict quality control procedures. High-quality materials, precise fittings, and calibrated instruments ensure long service life and consistent experimental results.
It complies with standard laboratory requirements and university syllabi.
