Fox Mini-Eductors

What are Fox Mini-Eductors?

Fox Mini Eductor with Penny

Fox Mini-Eductors are small venturi eductors that use pressurized gases or liquids to generate suction for a variety of sampling, pumping, mixing, or vacuum-generation applications. Fox stocks a broad range of off-the-shelf mini-eductors in 316 Stainless, Teflon, CPVC, Monel, Hastelloy, and Brass that can ship in just a few days. Please use the Data Sheets Below or the Ask a Question button to request a quote!

Most Mini-Eductors are In Stock and Ready to Ship in a few days!

Fox Mini-Eductor Dimensions

Air-Driven Fox Mini-Eductors

Gas Sampling for Analyzers and Instrumentation

Mini-Eductor Sampling System

Fox supplies many thousands of gas sampling mini-eductors every year. They are integrated into analyzer systems by many of the largest global instrumentation and analyzer suppliers, as well as by hundreds of end users. They are always in stock in 316 stainless and Teflon; Hastelloy, and Monel. See chart below for motive air requirements.

For a quote on your gas sampling application, please complete our Application Data Sheet!

Creating Vacuum to -28” Hg with Air at 60 – 100 psig

Off the shelf mini-eductors can create deep vacuum using a small amount of compressed air.

Purging or Evacuating Tubing

Because mini-eductors can pull a deep vacuum, they are frequently used to empty or purge tubing or pipe. This is particularly important when purging or exhausting corrosive, caustic, toxic, or explosive liquids or gasses. With no moving parts, and available in 316, TFE or Hastelloy – they offer a maintenance free way to extract hazardous fumes from tubes before maintenance. Because they pull down to such a deep vacuum, they can typically evaporate trace liquids.

How Much Motive Air Do Mini-Eductors Use?

Mini-Eductor Motive Air

What is the Maximum Shut-Off (No-Flow) Vacuum Mini-Eductors can Create?

Mini-Eductor Shut-Off Vacuum

Download our Mini-Eductor Brochure for more information

REQUEST A QUOTE - GASES

Conveying Powders with Mini-Eductors

Fox mini-eductors can be used to convey very small amounts of fine powders, over short distances, in carefully engineered systems – usually pilot or bench-top research applications. Powders must be trickle-fed or dosed by a feeder – they cannot be dumped or batch fed into such a small opening. Please use the Ask a Question form to request more information about these types of applications.


Liquid-Driven Fox Mini-Eductors

Liquid-driven mini-eductors are used in a huge variety of industrial applications – especially for replacing and eliminating expensive small pumps in corrosive, explosive, high purity, or toxic applications – including

Emptying drains, sumps, tubing

An ideal way to pump water, fuel, hydraulic oil, acid or any leak fluids from small sumps and trays where leakage can accumulate

Refrigerants

Fox supplies many, many thousands of brass and 316 ss mini-eductors installed on chillers and HVAC systems.

Creating Solutions/Diluting Acids

Liquids Pumping Gas – Liquid driven mini-eductors are capable of entraining small amounts of gasses, but only if the discharge pressure is below about 2 psig.

REQUEST A QUOTE - LIQUIDS

Mini-Eductor Dimensions and End Connections

End Connections – Standard off the shelf mini-eductors are stocked with NPT threaded ends. This very common thread enables global users to purchase commercially available adapters and thread on adaptors to whatever end connection is needed. However, they can also be supplied with any of the following end connection options – which add cost and delay compared to stock mini-eductors – SAE, AN/JIC 37* flared tube, plain tubing OD stub ends for use with flareless tube fittings – 1/4” to 1/2” (6mm to 12mm)

Fox Mini-Eductor Dimensions

The most common mini-eductor Part Numbers are 611210-015, 611210-030, 611210-060, and 611210-093.


Customized Mini-Eductors for Prototype or OEM Applications

lots of mini eductors
The above photo shows many Fox mini-eductors with different end connections to facilitate installation in our customer’s OEM product

Fox’s off-the-shelf mini-eductors, although ideal for hundreds of common applications, are not perfectly suited to every possible application. However, Fox can quickly deliver optimized mini-eductors, with internal dimensions modified to meet your operating conditions in just 1 – 2 weeks. Our proprietary computer models can enable us to design internal geometry per your fluids, flow rates and pressures, and then quickly modify existing stock components to assemble an optimized mini-eductor or prototype. Such internal modifications are particularly important when handling light or dense liquids, like gasoline or refrigerants; light or dense gasses, like hydrogen, natural gas, or argon; or when handling fluids at high or low temperatures.

This approach has often enabled Fox to produce, in a matter of days, what we call a B+ ‘proof of concept’ prototype, which may then lead to a uniquely-designed A+ production design. This rapid response of quickly produced prototypes, working closely with R & D and development departments has led to Fox supplying many thousands of production mini-eductors – every year – for refrigerant systems, instrumentation, and fuel cell applications.

Not only can internal geometry be changed to suit design conditions, but additional features can be added such as two to four suction ports, mounting holes, special end connections, electropolishing, UL-approval, passivation, oxygen cleaning, etc.


How Do Fox Mini-Eductors Work?

Mini-Eductor Cross Section

Mini-Eductors are used in the same way as a pump in a process or system. However, instead of using electricity to drive a rotating impeller or compressor, the mini-eductor uses fluid mechanics to create suction with the energy stored in your motive fluid. This enables pumping or mixing to occur with no moving parts, and therefore with no maintenance.

How do they work? The ‘motive’ fluid available to drive the eductor (compressed air, N2, water, etc.) is discharged through a precision-machined nozzle. The resulting high velocity jet creates vacuum and can pull in another liquid or gas through the ‘suction’ port. These two fluid streams are mixed and discharged.

The most common mini-eductor Part Numbers are 611210-015-SS, 611210-030-SS, 611210-030-BR, 611210-060-SS, 611210-060-BR, and 611210-093-SS, and 611210-093-BR.