Fox Valves has been providing Venturi Eductor solutions since 1961. They are used to feed bulk solids - powders, pellets, flakes, and particulates into pressure, dilute-phase pneumatic conveying systems. They are commonly used in place of rotary valves where airlocks simply cannot perform adequately.

In operation the eductors convert the output of a blower into suction that is used to entrain and feed powders, pellets, and bulk solids into a pneumatic conveying system. Because they have no moving parts, they can operate almost entirely maintenance-free. 

Eductors can be fed or placed at the outlet of a hopper and will convey at a specified rate. Venturi size, placement and line size all determine the actual flow rate.

Ceramic lined or hardened units are provided for abrasive applications.

Dust Collector Systems
A Single positive displacement blower is used to drive three Fox Eductors located beneath a three-cell dust collector.
 

Replace multiple screw conveyors and airlocks at the outlet of your dust collector with one or multiple eductors and one blower package. Reduce downtime, maintenance costs and environmental issues

Building Products
Phenolic resin and sawdust for chipboard; Gypsum for sheetrock; Pumice powder for grout; Roofing granules;

Environmental
Activated Carbon, Sodium Bicarbonate, Hydrated Lime, Pulverized Limestone into ducts and stacks; Sorbent injection in fluidized bed boilers for SOx reduction

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

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
 

Foundries
Foundry dust from dust collectors; Inoculants to cupolas; Metal grit from grinding stations; Sand and bond
 

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)

Ceramics/Glass
Silica, Glass Frit, Ceramic dust, Mica, Sand/Clay mixes
 

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

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.

Filter Receivers, Cyclones

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Dilute Phase Pneumatic Conveying Systems

Dense Phase Pneumatic Conveying Systems

Rotary Valves, Rotary Airlocks