Compressed air is available in almost every industrial setting. It can therefore be manipulated by a Fox Mini-Eductor to create vacuum that can be used to pump, sample, or mix other gasses or to evacuate a small volume.

Because mini-eductors have no moving parts, they offer the maintenance-free way to sample or exhaust corrosive, explosive, dust-laden, or high-temperature gases. Three standard Mini-Eductors are stocked that, although they resemble each other externally, have very different internal geometries. The motive nozzle orifice sizes are .015", .030" and .060", - with similarly proportioned internals. Motive air consumption varies, therefore, by a factor of four with each eductor size change, enabling users to choose a Mini-eductor that minimizes their consumption of compressed air, GN2, or other gas.

I need to minimize compressed air consumption. How little air can I use?

The table below shows compressed air consumption, in SCFM of our three standard mini-eductors. Suction performance curves are available in our product literature, which can be downloaded. Download mini-brochure now.

What is typical suction capability?

One curve for the -060 mini-eductor is shown here as an example. Curves for other Fox mini-eductors can be obtained by downloading the brochure on mini-eductors.

This curve shows the entrained air flow rate, in SCFH, for varying conditions of motive air pressure and suction pressure. Atmospheric suction conditions is, of course, at 0" Hg vacuum. For long suction lines, as may exist on a sampling system where the analyzer is located far from the sample source (such as stack, vehicle or process), the line losses or P through the suction tubing must be estimated and used as the 'suction pressure'. This data assumes a discharge pressure of about 0 - 1 psig.