Orifice and Free Jet Flow (MODEL ME-FM-1279E-R)

The ARL’s 1279E Orifice & JET Flow equipment permits calibration of two orifices of differing diameter and enables the trajectory of the jet to be plotted.

  • Constant head tank with two interchangeable orifices
  • Quick-release fitting for easy connection to Hydraulics Bench
  • Jet trajectory measured and plotted using adjustable pointers
  • Educational software available as an option

In the Orifice & Free Jet Flow accessory a constant head tank is fed with water from the Hydraulics Bench. The orifice is installed at the base of this tank by means of a special wall fitting, which provides a flush inside surface.

The head is maintained at a constant value by an adjustable overflow and is indicated by a level scale. A series of adjustable probes enable the path followed by the jet to be ascertained.

Adjustable feet permit leveling.

ItemValue
Orifice diameters:3.0mm and 6.0mm
Jet trajectory probes:8
Max constant head:410mm
  • Establishing the coefficient of velocity for a small orifice
  • Finding the coefficient of discharge for a small orifice with flow under constant head and flow under varying head
  • Comparing the measured trajectory of a jet with that predicted by simple theory of mechanics

Hydraulics Bench

Height:0.60m
Width:0.67m
Depth:0.33m
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