Orifice and Venturi Meter Demonstration
Product Code : EL-FMLE-10670
Orifice and Venturi Meter Demonstration (code EL-FMLE-10670) is a Hydraulics Bench unit for finding the discharge coefficient (Cd) of a Venturi meter and of an orifice plate, mounted in series with a variable area meter so that all three can be read at one flow. An 8-tube manometer board covers 0 to 500 mm of water column and the flow meter 2 to 30 l/min; the Venturi has a 20 mm throat in a 32 mm pipe, and the orifice plate sits in a 35 mm pipe.
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Specifications
| Parameter | Detail |
|---|---|
| Use | Determining the Cd factor of a Venturi meter and an orifice plate, installed in series with a variable area meter, on a Hydraulics Bench |
| Meters | Venturi meter, variable-area meter and orifice plate, with flow-control valve |
| Pressure tappings | For the head loss across each meter |
| Manometer board | 8 tubes, range 0 to 500 mm of water column |
| Flow meter | 2 to 30 l/min |
| Orifice plate diameter | 25 mm |
| Calibration | Each flow meter calibrated with the volumetric measuring tank of the bench |
| Connection | Quick-release fitting for the Hydraulics Bench; quick coupling system built in |
| Structure | Anodized aluminium structure and panel of painted steel |
| Software | Educational software available as an option |
| Experiments | Cd factor of the Venturi; strangulation in the Venturi; Cd factor of the orifice plate; error in flow measurement with the orifice plate; comparison of pressure drops and of flow readings across the three devices |
| Venturi dimensions | |
| Throat diameter | 20 mm |
| Upstream pipe diameter | 32 mm |
| Downstream taper | 21° |
| Upstream taper | 14° |
| Orifice plate dimensions | |
| Upstream pipe diameter | 35 mm |
| Downstream orifice diameter | 19 mm |
| Dimensions | |
| L × W × H | 800 × 600 × 600 mm |
| Supply | |
| Product code | EL-FMLE-10670 |
| Manufacturer | Engineering Lab Equipment, Ambala, Haryana, India |
What Is the Orifice and Venturi Meter Demonstration Used For?
The discharge coefficient corrects the theoretical flow calculated from a meter's pressure difference to the flow that actually passes, and it is lower for an orifice plate than for a Venturi because the jet through a sharp-edged plate contracts and loses more energy. Students adjust the flow-control valve, note the variable area meter and the eight manometer readings, and measure the true flow with the bench volumetric tank. Dividing actual by theoretical flow at several rates gives Cd for each device, shows the pressure recovery after the Venturi throat and shows the error in flow readings taken with the orifice plate.
What to Specify When Ordering
- Quantity — the number of demonstration units required.
- Software — state if the optional educational software should be included.
Frequently Asked Questions
What is the Cd factor and how is it found here?
Cd is the ratio of actual to theoretical flow through a meter. It is found for the Venturi and the orifice plate by comparing their pressure readings with the flow measured in the bench volumetric tank.
What range does the manometer board cover?
The board has 8 tubes reading 0 to 500 mm of water column, linked to pressure tappings for reading the head lost across each of the three meters.
What size are the Venturi and the orifice plate?
The Venturi throat is 20 mm in a 32 mm upstream pipe, with a 21° downstream and 14° upstream taper. The orifice plate sits in a 35 mm upstream pipe with a 19 mm downstream orifice diameter.
What flow range does the variable area meter read?
The flow meter in series with the Venturi and orifice plate reads from 2 to 30 l/min, giving a direct reading to compare with the two differential pressure devices.
Is software available?
Educational software can be supplied as an option. The unit itself connects to the Hydraulics Bench by a quick-release fitting and has a built-in quick coupling system.
How large is the unit?
It measures 800 × 600 × 600 mm (L × W × H) and is built on an anodized aluminium structure with a painted steel panel.
OEM Manufacturer
Buyers of the Orifice and Venturi Meter Demonstration deal directly with its maker, Engineering Lab Equipment (Engineering Labs Equipment Pvt Ltd), whose works are at Plot No. 43, Industrial Park, Sector 2, Growth Center, Saha, District Ambala, Haryana, India. The company designs, makes and tests fluid mechanics apparatus for flow measurement, pipe friction, pumps and hydrostatics, supplies engineering colleges, polytechnics, technical training institutes and research laboratories in India and overseas, and builds to institution-specific requirements on request. Tender details are on the Tenders/OEM page.
Related Fluid Mechanics Equipment
- Flow Meter Demonstration Unit — transparent Venturi, orifice plate and variable area meter set with 8-tube manometer for bench flow studies.
- Bernoulli Theorem Demonstration Module — clear acrylic Venturi module with Pitot probe and eight-tube manometer for verifying Bernoulli's theorem.
- Orifice and Mouth Piece Flow Apparatus — constant-head clear tank with 3.5 and 6 mm orifices, Pitot traverse and 8 jet trajectory probes.
- Pitot Tube Apparatus — traversing Pitot static tube in a 32 mm transparent pipe with pressurised water manometer for velocity profiles.
See the full Fluid Mechanics Lab Equipment range or all Mechanical Engineering Lab Equipment.
Request a Quote
For this and other fluid mechanics lab equipment, schools and colleges can contact Engineering Lab Equipment, a manufacturer, supplier and exporter based in Ambala, India. Quotations are given on request: send the number of units and whether the optional educational software is wanted and your delivery location through the contact page, or add the Orifice and Venturi Meter Demonstration to the enquiry cart from this page.
Last updated: October 2026
