Orifice and Mouth Piece Flow Apparatus
Product Code : EL-FMLE-10669
QUICK ANSWER: The Orifice and Mouth Piece Flow Apparatus is used to determine the coefficient of discharge, velocity coefficient and contraction coefficient of an orifice and a mouthpiece, and to plot the trajectory and profile of the discharging jet. It consists of a cylindrical methacrylate tank, fed via the Basic Hydraulic Feed System from the Hydraulics Bench, with interchangeable orifices (3.5 mm and 6 mm diameter) fitted in the base; an orifice is a closed-perimeter opening in the side or bottom of the tank through which fluid is discharged, while a mouthpiece is a short tube fitted to a same-size circular opening for the same purpose. A traversable Pitot tube with a fine wire measures the jet diameter and vena contracta diameter (for the contraction coefficient), with the pitot head and total head displayed on manometer tubes, while a set of 8 vertical needles on an annexed panel, adjusted by command screws and read against a silk-screen scale, trace the trajectory and profile of the jet up to a maximum height of 500 mm.
The Orifice and Mouth Piece Flow Apparatus module consists of a cylindrical methacrylate tank that maintains a constant water level, fed via the Basic Hydraulic Feed System from the Hydraulics Bench. An orifice is an opening made in the side or bottom of the tank, having a closed perimeter, through which the fluid may be discharged, while a mouthpiece is a short tube fitted to a same-size circular opening provided in the tank so that fluid may be discharged through it; both are used to measure the rate of flow of liquid, and the apparatus is designed to measure the co-efficient of discharge of the orifice and mouthpiece. A Pitot tube, fitted with a fine wire that can be traversed across the jet, is used to accurately measure the jet diameter and the vena contracta diameter and so determine the contraction coefficient; the pitot head and the total head across the orifice are shown on manometer tubes adjacent to the tank. The position of a set of vertical needles, placed in an annexed panel and adjusted by means of command screws, traces the trajectory of the jet, and a silk-screen scale on this panel enables the profile of the jet to be measured; a traverse assembly is also provided, which enables the Pitot tube to be positioned anywhere in the jet.
FEATURES:
Anodized aluminum/ MS powder coated structure.
Cylindrical clear acrylic tank with orifice fitted in base
Interchangeable orifices
Pitot tube and wire-on micrometer to measure jet velocity and diameter
Determination of the orifice velocity coefficient.
Obtaining of the orifice discharge coefficient in permanent regime.
Obtaining of the orifice discharge coefficient in variable regime.
Obtaining of the tank discharge time.
SPECIFICATION:
Orifices with diameters of 3.5 and 6 mm.
Jet trajectory Probes: 8.
Maximum height: 500 mm.
Easy and quick coupling system built-in.
DIMENSIONS AND WEIGHT:
L x W x H: 800 x 600 x 600 mm
Weight: 40kg
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Last Updated: September 2026Related Products: Orifice and Venturi Meter Demonstration, Pitot Tube Apparatus, Flow Meter Demonstration Unit, Impact of a Jet Apparatus
