Venturi Tube Type Flow Meter – Complete Technical Guide | Saitechflow
A Venturi Tube Type Flow Meter is one of the most reliable and accurate differential pressure (DP) flow measurement devices used in industrial applications. Known for its high accuracy, low pressure loss, and long-term stability, the Venturi tube is widely used for measuring the flow of liquids, gases, and steam. At Saitechflow, we design and manufacture premium-quality Venturi Tube Type Flow Meters that comply with global standards such as ISO 5167, ASME MFC-3M, AGA, and API guidelines.
As a trusted manufacturer and supplier based in Pune, India, Saitechflow provides durable, precision-engineered Venturi tubes suitable for various industries such as water treatment, HVAC, chemical processing, power plants, oil & gas, and more. Our Venturi flow meters are built with advanced engineering techniques, ensuring accurate flow measurement with minimal maintenance for years
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What is a Venturi Tube Type Flow Meter?
A Venturi Tube Flow Meter works on the principle of creating a pressure differential as fluid flows through a narrowed section of the pipe. It consists of:
- Convergent Cone (Inlet section)
- Throat (Minimum cross-sectional area)
- Divergent Cone (Outlet section)
- Pressure Tappings (Upstream and Throat Point)
As fluid flows through the Venturi tube, the velocity increases and the pressure decreases at the throat. The pressure difference is measured and converted into flow using the Bernoulli equation.
Saitechflow manufactures Venturi tubes with high accuracy, smooth inner finish, and perfect dimensional control to meet international engineering standards.
Why Choose Venturi Tube Flow Meters from Saitechflow?
- High Accuracy (±0.5% to ±1%)
Saitechflow Venturi tubes are designed with optimized converging and diverging angles to minimize energy losses, ensuring excellent measurement precision.
- Minimal Pressure Loss
Unlike orifice plates, Venturi tubes cause very low permanent pressure drop, making them ideal for large-scale continuous flows.
- Suitable for Dirty Fluids
Their wider throat area helps maintain stable flow measurement even in fluids with:
- Sediments
- Suspended solids
- High viscosity
- Long Service Life
Manufactured using SS304, SS316, carbon steel, duplex steel, and exotic alloys, Saitechflow Venturi tubes offer long-term durability in corrosive and abrasive environments.
- Custom-Made Solutions
We offer fully customized Venturi tube designs based on:
- Line size
- Flow rate
- Pressure rating
- Fluid characteristics
- Installation type
- Compliant with Global Standards
Our Venturi tubes meet:
- ISO 5167
- ASME MFC
- API
- AGA
- Manufactured in Pune, India
Saitechflow provides fast delivery and competitive pricing for industries across India and overseas.
Components of a Venturi Tube Flow Meter
Saitechflow Venturi Tube Assemblies consist of high-quality components:
- Converging Section
Tapered inlet where fluid velocity increases smoothly.
- Throat Section
A narrow cross-section where differential pressure is measured.
- Diverging Section
Reduces fluid velocity gradually to recover pressure.
- Differential Pressure Tappings
Precisely located pressure-sensing points:
- Upstream tapping
- Throat tapping
- Flanges
Available in:
- ANSI B16.5 Class 150 – 2500
- DIN PN10 – PN250
- Gaskets, Bolts & Hardware
Available in:
- PTFE
- Spiral wound
- CAF
Types of Venturi Tubes Manufactured by Saitechflow
- Classical Venturi Tube
Standard design with long convergent and divergent sections.
Best for: High-accuracy applications.
- Short-Form Venturi (ASME Type)
Compact design with a shorter convergent section.
Ideal for: Limited installation space.
- Machined Venturi Tube
Designed with precision machining for small line sizes.
- Fabricated Venturi Tube
Made from rolled sheet metal or welded steel plates for large pipelines.
- Plastic Venturi Tube
Used in corrosive environments such as chemical dosing systems.
Material options:
- PVC
- PP
- PVDF
Saitechflow provides all these types in customized sizes ranging from DN25 to DN2000.
Working Principle of Venturi Tube Flow Meter
The Venturi tube is based on Bernoulli’s equation and continuity principle.
As fluid enters the convergent section:
- Velocity increases
- Pressure decreases
At the throat:
- Pressure becomes minimum
- Differential pressure is generated
The pressure difference between the upstream section and the throat is measured with:
- Differential Pressure Transmitter
- Manometer
- Mechanical DP Gauge
The flow rate is calculated using:
Q = Cd × A × √(2ΔP/ρ)
Where:
- Q – Flow rate
- Cd – Discharge coefficient
- A – Throat area
- ΔP – Pressure differential
- ρ – Fluid density
Saitechflow provides complete documentation including DP calculation sheets.
Advantages of Venturi Tube Type Flow Meter
✔ High accuracy & repeatability
✔ Low permanent pressure drop
✔ Suitable for large pipelines (up to 2 meters diameter)
✔ Ideal for dirty and slurry-based fluids
✔ No moving parts → zero maintenance
✔ Long service life
✔ Resistant to corrosion & erosion
✔ Accurate at low Reynolds numbers
✔ Simple to operate and calibrate
This is why Venturi tubes are the most preferred solution for municipal water supply, irrigation, HVAC, and power plants.
Applications of Venturi Tube Flow Meter
Saitechflow Venturi Tube Assemblies are widely used in:
- Water Supply & Distribution
- Raw water measurement
- Treated water flow
- Irrigation systems
- Municipal pipelines
- Chemical & Petrochemical Industry
Venturi tubes can handle:
- Corrosive liquids
- Acidic solutions
- Viscous chemicals
- HVAC & Building Automation
Used for:
- Chilled water
- Hot water loops
- Air and gas measurement
- Oil & Gas
- Natural gas flow
- Crude oil flow
- Injection lines
- Power Generation
- Boiler feedwater
- Steam measurement
- Cooling water lines
- Mining & Mineral Processing
Venturi tubes handle slurry-based fluids efficiently.
- Food & Beverage
Used for:
- High-viscosity materials
- Ingredient flow control
- Pharmaceutical
Accurate flow measurement for clean utilities.
Saitechflow Venturi tubes are suitable for clean, dirty, and high-pressure fluids, making them versatile across industries.
Technical Specifications (Typical)
- Pipe Size: DN25 to DN2000
- Accuracy: ±0.5% to ±1%
- Repeatability: ±0.1%
- Pressure Rating: Class 150 to Class 2500
- Material Options: SS304, SS316, CS, Duplex, Super Duplex, Inconel, Hastelloy
- Fluid Type: Liquid, gas, steam
- Temperature Range: -40°C to 450°C
- Differential Pressure Taps: Flange / Corner / D-D
Why Saitechflow is the Best Manufacturer & Supplier in India
- Advanced Manufacturing Facility
Our Pune-based unit is equipped with:
- CNC machines
- Automated welding systems
- Hydro testing setups
- Laser calibration tools
- Strict Quality Control
We ensure:
- Dimensional accuracy
- Hydro-pressure testing
- Flow simulation tests
- Surface finishing checks
- Custom Engineering Support
We provide:
- Design consultation
- DP calculation
- Technical drawings
- Installation guidance
- Fast & Reliable Delivery
We supply Venturi tubes across:
- Pune
- Maharashtra
- Entire India
- International markets
- Competitive Prices
High-quality, cost-effective solutions tailored for industries of all sizes.
Conclusion
Saitechflow is one of the most trusted manufacturers and suppliers of Venturi Tube Type Flow Meters in Pune, India, offering robust and precise flow measurement solutions. Our Venturi tubes are engineered for accuracy, durability, and long-term performance with minimal maintenance. Whether you need a standard classical Venturi or a fully customized solution, Saitechflow delivers world-class quality at competitive prices.
