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Fox Venturi Eductors

Fox Venturi Eductors for Conveying Solids with No Moving Parts

Fox Valves has been providing Venturi Eductor solutions since 1961. Venturi Eductors are used to feed bulk solids - powders, pellets, flakes, and particulates into pressure, dilute-phase pneumatic conveying systems. Venturi Eductors are commonly used in place of rotary valves where airlocks simply cannot perform adequately. Fox Venturi Products (Fox Valve) has been the leading global supplier of venturi eductors and venturi transport systems for dilute phase pneumatic conveying of powders, pellets, and bulk solids since 1963. Fox Eductors, also referred to as jet pumps, enable the use of low pressure air (below 14 psig or 1 bar) to be used to move powders, pellets, and bulk solids with no moving parts. These venturi eductor systems can be used to convey product at up to 15 tons per hour over distances up to 500 feet.
  • No Maintenance
  • No BlowBack
  • Minimal Product Degradation
  • Easy to Clean (CIP Versions)
Advantages and Features

Fox Venturi Eductors are used to feed powders, pellets, and bulk solids into a pneumatic conveying system. Because they have no moving parts, they can and often do operate almost entirely maintenance-free. Feedback from customers often reveals five, ten, or even fifteen years of maintenance-free operation. Please ask a CMT representative if your application will be suitable for a Fox Venturi Eductor.

Replace Rotary Valve with a Fox Venturi Eductor
Replace Rotary Valve with a Fox Venturi Eductor
HOW ARE THEY USED IN PNEUMATIC CONVEYING SYSTEMS?

Fox Venturi Eductors are used to introduce bulk solids such as powders, pellets, flakes, and particulates into positive pressure conveying systems. They offer end users and system designers a way to eliminate rotary valves from conveying systems where rotary airlocks/rotary valves simply cannot perform adequately. This often occurs with very fine, abrasive, fragile, or high-temperature solids.
Venturi In Pneumatic Conveying System
Fox Venturi Valve
The role of Fox Venturi Eductors In Pneumatic Conveying Systems

Fox Venturi Eductors Have No Moving Parts, providing maintenance-free feeding of powders and other bulk solids. This is a big advantage when the application involves fine or abrasive material. Replacing your inefficient rotary airlocks with venturi eductors guarantees efficiently flowing conveying systems. The design team at Carolina Material Technologies prides itself at finding the most reliable product feeding techniques available. Fox Venturi Eductors certainly provide that.
Fox Venturi Eductor Role in Pneumatic Conveyors
Why Fox Venturi Eductors?

No Blowback – All rotary airlocks/rotary valves have blowback – also known as fugitive dust or leakage. If the material conveyed is fine or abrasive, blowback can cause wear and tear throughout your system. Blowback can be a problem even with free-flowing materials, causing bridging and other material flow problems, and in worst case scenarios - an explosion hazard. Many plant operators report fugitive dust emissions from airlocks that are installed beneath baghouses, screw conveyors, or dust collectors. These problems were eliminated after a retrofit to Fox Venturi Eductors.

No moving parts highly reduces the chances of Mechanical Shearing or Product Damage. Fox Venturi Eductors minimize the shearing, smearing or degradation of products common with rotary airlocks. Fox Venturi Eductors also provide a safe environment for operators compared to rotary airlocks.
Fox Venturi Eductor Diagram
Fox Venturi Eductor Diagram from Hoppers
Industries Served
Building Products
Phenolic resin and sawdust for chipboard; Gypsum for sheetrock; Pumice powder for grout; Roofing granules;
Cement
CKD at up to 800° F; Portland cement at up to 20,000 lbs/hr; Alternate fuel injection (shredded carpets/plastic/tires//paper; biomass, rice hulls.) Kiln spill at 1600° F
Ceramics/Glass
Silica, Glass Frit, Ceramic dust, Mica, Sand/Clay mixes
Environmental
Activated Carbon, Sodium Bicarbonate, Hydrated Lime, Pulverized Limestone into ducts and stacks; Sorbent injection in fluidized bed boilers for SOx reduction
Foundries
Foundry dust from dust collectors; Inoculants to cupolas; Metal grit from grinding stations; Sand and bond
Food
Minor ingredients to mixing/batching (salt, sugar, spices, vitamins, flavorings, etc.); Milk powders from spray dryers; Coffee beans from bulk bags; Powdered tea from screeners; Rice; Breakfast cereal from coating reels; Snack food extrudate from extruders; Frozen peas from IQF; Whole peanuts
Hygienic/Diapers
SAP from feeders with uniform flow distribution
Minerals/Mines
Hot copper and nickel alloys at 1000°F from calciners; Mica, talc, quartz, and perlite ore from dust collectors; Copper pellets at 400 lbs/ft3 bulk density
Power/Incineration
Coal, coke, and alternative fuels; Additives for inhibiting slag build-up on boiler tubes; sorbents for SOx reduction in CFB's; Activated carbon, lime, calcium carbonate, Trona injection for flue gas desulphurization (FGD)
Plastics
Plastic pellets with reduced angel hair and fines from hundreds of extruders and compounding lines since 1963; 50+ fiberglass filled pellets with Clean-in-place, ceramic-lined wear resistant eductors; Conveying plastic regrind and flakes that jam airlocks in 10 minutes.
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