UNI-WASH DDB Series Wet Dust Collectors – Downdraft Bench

Wet Downdraft Bench

Uni-Wash DDB
Wet Type Dust Collectors

Brochure Wet Downdraft Bench Brochure


Standard Features

  • 500 CFM to 15,000 CFM Standard
  • Integral High Efficiency Fan Assemblies and Controls
  • 100% Stainless Steel Scrub Components
  • Fresh Water and Drain Piping Connections
  • Galvanized Mist Eliminators
  • Float Type Mechanical Water Level Control

Optional Features

  • NFPA Combustible Metals Standard 484 Compliance
  • Electronic Differential Pressure Automatic Water Level Control
  • 304 Stainless Steel Construction
  • Hood / Lighting / Sound Insulation
  • Work Deck Materials


  • Metal Finishing
  • Food Processing
  • Pharmaceutical Processes
  • Biomedical manufacturing
  • Shot Peening, Sand Blasting

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Wet type dust collection is required for the safe collection of combustible metal dust. Wet Type Dust Collection has also been used effectively in many other difficult applications in place of cartridge collectors. ProVent’s unique scrub design has been an industry standard for over 40 years and continues to lead the industry in Wet Type Dust Collection efficiency.

ProVent’s line of Uni-Wash Wet Type Downdraft Bench Dust Collectors meets or exceeds NFPA #484 for combustible metals including:

  • Aluminum Dust Collector
  • Titanium Dust Collector
  • Magnesium Dust Collector
  • Zirconium Dust Collector
  • Tantalum Dust Collector
  • Niobium Dust Collector

ProVent’s line of DDB Series Wet Type Downdraft Bench Dust Collectors are available in the following standard sizes:

  • 500 CFM Wet Downdraft Dust Collector
  • 1000 CFM Wet Downdraft Dust Collector
  • 2000 CFM Wet Downdraft Dust Collector
  • 2500 CFM Wet Downdraft Collector
  • 3000 CFM Wet Downdraft Collector
  • 4000 CFM Wet Downdraft Collector
  • 5000 CFM Wet Downdraft Collector
  • 6000 CFM Wet Downdraft Collector
  • 7500 CFM Wet Downdraft Collector
  • 10,000 CFM Wet Downdraft Collector
  • 12,500 CFM Wet Downdraft Collector
  • 15,000 CFM Wet Downdraft Collector

Unique Scrub Design

Water is continuously agitated by the suction of the air through the machine. There are no nozzles, piping or water pumps to clean, repair or replace. The consumption of water is negligible. Only normal evaporation occurs and the water loss is replenished automatically. Collected sludge is easily removed from the sloping tank via the tank access doors, or through the use of an optional automatic sludge removal equipment.

The unique scrub design is completed in a five step process consisting of :

  1. Striking the turbulent water surface in the water tank section of the machine
  2. Passing through a vertical water curtain
  3. Scrubbed through a water cascade on cone walls.
  4. Passing through a horizontal water curtain
  5. Buffeted through the moisture separator section before the fan entry and exhaust out of the machine.

Benefits of Wet Type Dust Collection

The closed loop tank water is used as the collection medium. There are no pulsing systems, compressed air, cartridge media, or bag filters to clean or replace.

Combustible dusts are immediately rendered inert upon being captured and pulled down into the water washing scrub below the work deck.

Processes like mixing and weighing operations involving food or other soluble material are ideal for the Uni-Wash DDB as well.
Regardless of your process, users always enjoy the highest capture velocity in the industry to keep process dust pulled down and away from the breathing zone.

Uni-Wash DDB model wet type down draft tables make setting up a new cell immediate. Installation is simple by easily connecting your power supply and plumbing connections. There is no expensive duct work connections that would significantly add to the cost of the project.

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