Orifice and Venturi Meter Demonstration
Product Code : EL-FMLE-10670
QUICK ANSWER: The Orifice and Venturi Meter Demonstration unit is used to directly compare the flow-measurement characteristics of three flow meters – a Venturi meter, a variable-area meter and an orifice plate – installed in series, so that their coefficient of discharge (Cd), strangulation and measurement error can be determined and compared. Water from the Hydraulics Bench passes through the circuit at a rate set by a flow-control valve, with pressure tappings on each meter connected to an eight-tube manometer bank (0 to 500 mm water column range) fitted with an air bleed valve and pressurized by a hand pump; the Venturi meter has a 20 mm throat, 32 mm upstream pipe diameter, 21° downstream taper and 14° upstream taper, while the orifice plate (25 mm orifice diameter) has a 35 mm upstream pipe and 19 mm downstream orifice diameter, and each flow meter can be volumetrically calibrated against the bench’s own measuring tank over a flow range of 2 to 30 l/min.
The equipment consists of a Venturi meter, variable area meter and orifice plate, installed in a series configuration to permit direct comparison, with a flow control valve permitting variation of the flow rate through the circuit. Pressure tappings are incorporated so that the head loss characteristics of each flow meter may be measured; these tappings are connected to an eight-tube manometer bank incorporating a manifold with an air bleed valve, and a hand pump facilitates pressurization of the manometers. The circuit and manometer are attached to a support framework, which stands on the working top of the Hydraulics Bench; the bench is used as the source of water supply and for volumetrically calibrating each flow meter, which enables the levels in the manometer bank to be adjusted to a convenient level to suit the system static pressure.
FEATURES:
Venturi meter, variable-area meter and orifice plate with flow-control valve.
Determination of the Cd factor in the Venturi.
Determination of the strangulation in the Venturi.
Determination of the Cd factor in the orifice plate.
Determination of the error in flow measurements using the orifice plate.
Pressure tapping’s to measure head loss across each meter.
Quick-release fitting for easy connection to Hydraulics Bench.
Calibrating each flow meter using the volumetric measuring tank of the bench.
Comparing pressure drops across each device.
Directly comparing flow measurement using a Venturi meter, variable area meter and orifice plate.
Educational software available as an option.
Supplied with manometer board with eight tubes.
SPECIFICATION:
Manometer range: 0 to 500 mm. of water column.
Number of monomeric tubes: 8.
Orifice plate diameter: 25 mm.
Flow meter: 2 to 30 l./min.
Easy and quick coupling system built-in.
Anodized aluminum structure and panel of painted steel.
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 AND WEIGHT:
L x W x H: 800 x 600 x 600 mm
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Last Updated: September 2026Related Products: Flow Meter Demonstration Unit, Bernoulli Theorem Demonstration Module, Orifice and Mouth Piece Flow Apparatus, Pitot Tube Apparatus
