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Air Handling and Vent Duct Dust Control Nozzles

Suppress stone, coal, paint, and other dust in air handling ducts & vents

Questions? Ask an Engineer
Moving air through duct work is an essential part of many industrial processes. Often the air in the duct contains particulates which need to be removed, either for process control reasons, human health concerns, maintenance reduction, or simply good housekeeping. Airborne dust can be captured using a water spray. Water sprays have an inherent maintenance advantage over filter systems as they typically do not have to replaced frequently to maintain effective performance, low pressure drops, and overall system performance.

The premise is that when a water droplet comes into contact with a dust particle, they will agglomerate and the resulting combination will be too heavy to remain suspended in the air stream. The water droplet/dust particle combination will then fall out of the air stream where the dust can be disposed of. To obtain the most effective dust removal, the droplets should typically be 1 to 5 times the size of the dust that is being controlled. If the drops are too small, they will be unable to agglomerate with and knock down the dust particles. Conversely, water drops which are significantly larger than the dust particles form an air barrier around themselves, preventing the dust from gaining direct contact and encapsulation/agglomeration with the water droplet. BETE can provide droplet size distributions to aid in the selection of the correct nozzle and operating parameters.

For extremely fine particulates or particles in a fast-moving gas stream, a staged approach can be taken in which a spray of fine droplet sizes captures the very small particles and additional sprays of larger droplet sizes capture the smaller droplets.

 

Selecting an Air Duct Dust Control Nozzle:

Important factors to consider:

  • Dust particle size and concentration
  • Duct/vent dimensions
  • Air/gas velocity through the duct/vent
  • Available nozzle mounting locations
  • Available and allowable water flow rates
  • Available liquid pressure drop (∆P) across the nozzle(s)
    • ∆P = supply pressure at nozzle inlet - process pressure outside nozzle
  • Our experienced engineers can help determine which nozzle will perform as required with your design details

Common Air Duct Dust Control Nozzle Uses and Industries:

  • Fume ducts at steel mills and other metal fabrication facilities
  • Coal conveyer vents
  • Fiberglass manufacturing and processing facilities
  • Paint booths
  • Material processing equipment

MicroWhirl

  • Outstanding atomization
  • Optional safety wire hole available
Nozzle Type(s):
Whirl
  • BETE misting nozzles provide the low flow rates and fine atomization required for efficient dust suppression
Spray Pattern(s):
Mist
Flow Range:
.008 to .380 gpm
Typical Pressure Range:
100 to 3000 psi
Angle Range:
1 - 120°
Common Materials:
303, 316

Mist

Select a nozzle number below for performance graph, drawings, and to request a quote.
Nozzle Number Connection Sizes Spray Angles gpm @ psi     (density: 1 SG)
100 psi 250 psi 500 psi 1000 psi 2000 psi 3000 psi
MW 085 1/8″, 1/4″, 3/8-24 70° .008 .013 .019 .027 .038 .047
MW 105 1/8″, 1/4″, 3/8-24 70° .010 .017 .024 .033 .047 .058
MW 125 1/8″, 1/4″, 3/8-24 70° .012 .020 .028 .040 .056 .068
MW 145 1/8″, 1/4″, 3/8-24 70° .014 .023 .032 .046 .065 .079
MW 195 1/8″, 1/4″, 3/8-24 70° .020 .031 .044 .062 .087 .107
MW 275 1/8″, 1/4″, 3/8-24 70° .028 .044 .062 .087 .123 .151
MW 695 1/8″, 1/4″, 3/8-24 70° .069 .110 .155 .219 .310 .380

These values are filtered based on search criteria or application and do not represent the full range of nozzles for this series. Click here to see all available series offerings.

PJ

  • Impingement style nozzle with external pin
  • No whirl vanes or internal parts
  • Lower flow rates than P series
  • Multiple filter options available
  • Optional safety wire hole available
Nozzle Type(s):
Impingement
  • Impingement nozzles provide some of the finest atomization of any nozzle type for lower flow rate applications making them ideal for dust suppression applications
Spray Pattern(s):
Mist
Flow Range:
.007 to .865 gpm
Typical Pressure Range:
50 to 3000 psi
Angle Range:
90°
Common Materials:
Brass, 303, 316

Mist

Select a nozzle number below for performance graph, drawings, and to request a quote.
Nozzle Number Connection Sizes Spray Angles gpm @ psi     (density: 1 SG)
10 psi 40 psi 100 psi 1000 psi 2000 psi 3000 psi
PJ 6 1/8″, 1/4″ 90° - - .010 .030 .042 .052
PJ 8 1/8″, 1/4″ 90° - - .018 .057 .080 .099
PJ 10 1/8″, 1/4″ 90° - .017 .027 .085 .120 .147
PJ 12 1/8″, 1/4″ 90° - .023 .036 .115 .163 .199
PJ 15 1/8″, 1/4″ 90° - .037 .058 .185 .262 .320
PJ 20 1/8″, 1/4″ 90° .034 .067 .106 .335 .474 .581
PJ 24 1/8″, 1/4″ 90° .050 .100 .158 .500 .707 .865

These values are filtered based on search criteria or application and do not represent the full range of nozzles for this series. Click here to see all available series offerings.

TF

  • Thirty percent finer atomization than an equivalent whirl nozzle
Nozzle Type(s):
Spiral
  • BETE is the originator of the spiral nozzle design, providing unparalleled atomization and clog resistance
Spray Pattern(s):
Full Cone
Flow Range:
.494 to 58.4 gpm
Typical Pressure Range:
30 to 200 psi
Angle Range:
90 - 170°
Common Materials:
Brass, 303, 316

Full Cone

Select a nozzle number below for performance graph, drawings, and to request a quote.
Nozzle Number Connection Sizes Spray Angles gpm @ psi     (density: 1 SG)
5 psi 20 psi 40 psi 60 psi 100 psi 400 psi
TF 6 1/8″, 1/4″, 3/8″ 90°, 120°, 150°, 170° .494 .988 1.40 1.71 2.21 4.42
TF 8 1/8″, 1/4″, 3/8″ 90°, 120°, 150°, 170° .919 1.84 2.60 3.18 4.11 8.22
TF 10 1/4″, 3/8″ 90°, 120°, 150°, 170° 1.41 2.83 4.00 4.90 6.32 12.6
TF 12 3/8″ 90°, 120°, 150°, 170° 2.12 4.24 6.00 7.35 9.49 19.0
TF 14 3/8″ 90°, 120°, 150°, 170° 2.86 5.72 8.10 9.91 12.8 25.6
TF 16 3/8″ 90°, 120°, 150°, 170° 3.76 7.51 10.6 13.0 16.8 33.6
TF 20 3/8″ 90°, 120°, 150°, 170° 5.84 11.7 16.5 20.2 26.1 52.2

These values are filtered based on search criteria or application and do not represent the full range of nozzles for this series. Click here to see all available series offerings.

TF

  • Thirty percent finer atomization than an equivalent whirl nozzle
Nozzle Type(s):
Spiral
  • BETE is the originator of the spiral nozzle design, providing unparalleled atomization and clog resistance
Spray Pattern(s):
Hollow Cone
Flow Range:
.494 to 58.4 gpm
Typical Pressure Range:
30 to 200 psi
Angle Range:
90 - 170°
Common Materials:
Brass, 303, 316

Hollow Cone

Select a nozzle number below for performance graph, drawings, and to request a quote.
Nozzle Number Connection Sizes Spray Angles gpm @ psi     (density: 1 SG)
5 psi 20 psi 40 psi 60 psi 100 psi 400 psi
TF 6 1/4″ 90°, 120° .494 .988 1.40 1.71 2.21 4.42
TF 8 1/4″ 90°, 120° .919 1.84 2.60 3.18 4.11 8.22
TF 10 1/4″ 90°, 120° 1.41 2.83 4.00 4.90 6.32 12.6
TF 12 3/8″ 90°, 120° 2.12 4.24 6.00 7.35 9.49 19.0
TF 14 3/8″ 90°, 120° 2.86 5.72 8.10 9.91 12.8 25.6
TF 16 3/8″ 90°, 120° 3.76 7.51 10.6 13.0 16.8 33.6
TF 20 3/8″ 90°, 120° 5.84 11.7 16.5 20.2 26.1 52.2

These values are filtered based on search criteria or application and do not represent the full range of nozzles for this series. Click here to see all available series offerings.

XAAD

  • Internal mix air atomizing nozzle
  • Wide variety of hardware configurations
  • Available with clean out and shut off capabilities
  • Nickel alloy and other 300 series stainless steels available by request
Nozzle Type(s):
Air-Atomizing
  • Air-atomizing nozzles provide the fine atomization and high turndown rates often required for dust suppression applications
Spray Pattern(s):
Hollow Cone
Angle Range:
70°
Common Materials:
Nickel-plated Brass, 303, 316