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Foam Control Nozzles

Control build-up of foam in aeration and settling basins, digesters, mixing vessels, and below weirs/spillways

Questions? Ask an Engineer
Foam is a dispersion of gas (typically air) in a liquid. Air/gas can be entrained via agitation at the surface, such as a spinning impeller partially out of the liquid or a stream entering the free surface of a liquid (e.g., where a waterfall meets the pool at its base) or be created by biological or chemical reactions or processes. Foam is undesirable because it can overflow vessels, create slippery and unsafe working conditions, interfere with processing, damage materials, and cause tanks to drain and dry slowly. Controlling foam can be accomplished by spraying liquid onto the surface of the pool, vessel or reservoir, and allowing the droplets of the spray to impact the foam bubbles, causing them to break.
 

Selecting a Foam Control Nozzle: 

Important factors to consider:

  • Required coverage
  • Static vs. moving fluids
    • If the contents of a tank, vessel are rotating, or the fluid is traveling in a trough or weir, a line of nozzles across the vessel can be used as the entire surface of the tank will pass under the line of nozzles after a complete rotation
  • Available nozzle mounting locations
  • Foam thickness and rate of build-up (required drop size for break-up and mitigation)
    • If the droplets are too small and have too little momentum they will bounce off the bubble surface with no effect
    • Similarly, if the droplets are too large and have too much momentum they will crash through the bubble and impact the liquid below, causing more foam to be generated
  • Nozzle clog resistance
    • As the foam control fluid is commonly recirculated, containing solids or waste particles, selection of the nozzle with regard to clog resistance is important
  • Available pressure drop (∆P) across the nozzle
    • ∆P = supply pressure at nozzle inlet - process pressure outside nozzle
    • Typical operating pressures range from 5-20 PSI (0.3-1.4 bar) to produce a suitble droplet size and velocity for effective foam mitigation
  • Our experienced engineers can help determine which nozzle will perform as required with your design details

Common Foam Control Nozzle Uses and Industries:

MaxiPass

  • BETE MaxiPass nozzles provide the ideal combination of even coverage, drop size, and free passage / clog resistance for foam control applications
  • BETE's unique, clog resistant S-vane design gives the MaxiPass the largest free passage available for a given flow rate, making it resistant to clogging, efficient, and reliable
  • Easily handles liquids with a high solids concentration
  • High reliability spray performance under the most difficult conditions
Nozzle Type(s):
Whirl
Spray Pattern(s):
Full Cone
Flow Range:
.697 to 151 gpm
Typical Pressure Range:
5 to 20 psi
Angle Range:
90 - 120°
Common Materials:
Brass, 316, PVC, Polypropylene

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)
3 psi 5 psi 10 psi 20 psi 50 psi 80 psi
MP 125 3/8″ 90°, 120° .697 .886 1.23 1.70 2.62 3.26
MP 156 3/8″ 90°, 120° 1.11 1.41 1.95 2.70 4.16 5.18
MP 187 3/8″, 1/2″ 90°, 120° 1.60 2.03 2.82 3.90 6.00 7.48
MP 218 1/2″ 90°, 120° 2.55 3.24 4.49 6.21 9.56 11.9
MP 250 1/2″ 90°, 120° 2.87 3.64 5.05 6.99 10.8 13.4
MP 281 3/4″ 90°, 120° 3.52 4.47 6.20 8.58 13.2 16.5
MP 312 3/4″ 90°, 120° 4.26 5.41 7.50 10.4 16.0 19.9
MP 343 3/4″ 90°, 120° 5.21 6.63 9.18 12.7 19.6 24.4
MP 375 3/4″, 1″ 90°, 120° 6.15 7.82 10.8 15.0 23.1 28.8
MP 406 1″ 90°, 120° 7.37 9.37 13.0 18.0 27.7 34.5
MP 437 1″, 1 1/4″ 90°, 120° 8.61 11.0 15.2 21.0 32.3 40.3
MP 500 1 1/4″ 90°, 120° 11.1 14.1 19.5 27.0 41.5 51.8
MP 531 1 1/4″ 90°, 120° 12.3 15.6 21.7 30.0 46.2 57.6
MP 562 1 1/4″, 1 1/2″ 90°, 120° 13.5 17.2 23.8 33.0 50.7 63.3
MP 593 1 1/2″ 90°, 120° 15.4 19.5 27.1 37.5 57.7 71.9
MP 625 1 1/2″ 90°, 120° 16.4 20.8 28.9 40.0 61.5 76.7
MP 656 1 1/2″ 90°, 120° 19.9 25.4 35.1 48.6 74.8 93.3
MP 687 1 1/2″ 90°, 120° 20.9 26.6 36.9 51.1 78.6 98.0

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.

NF

  • Durable one-piece construction
  • High impact
  • Axial spray design with no internal components provides flexible and clog resistant design for almost any application
Nozzle Type(s):
Fan
Spray Pattern(s):
Fan
Flow Range:
.353 to 70.7 gpm
Typical Pressure Range:
5 to 20 psi
Angle Range:
90 - 120°
Common Materials:
Brass, 303, 316, PVC, Polypropylene

Fan

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 100 psi 200 psi 400 psi
NF 10 1/8″, 1/4″, 3/8″ 90°, 110°, 120° .353 .707 .999 1.58 2.23 3.16
NF 15 1/8″, 1/4″, 3/8″ 90°, 110°, 120° .530 1.06 1.50 2.37 3.35 4.74
NF 20 1/8″, 1/4″, 3/8″ 90°, 110°, 120° .707 1.41 2.00 3.16 4.47 6.32
NF 30 1/8″, 1/4″, 3/8″ 90°, 110°, 120° 1.06 2.12 3.00 4.74 6.70 9.48
NF 40 1/8″, 1/4″, 3/8″ 90°, 110°, 120° 1.41 2.83 4.00 6.32 8.94 12.6
NF 50 1/4″, 3/8″ 90°, 110°, 120° 1.77 3.54 5.00 7.91 11.2 15.8
NF 60 1/4″, 3/8″, 1/2″ 90°, 110°, 120° 2.12 4.24 6.00 9.49 13.4 19.0
NF 70 1/4″, 3/8″, 1/2″ 90°, 110°, 120° 2.48 4.96 7.02 11.1 15.7 22.2
NF 80 3/8″, 1/2″ 90°, 110°, 120° 2.82 5.63 7.97 12.6 17.8 25.2
NF 90 3/8″, 1/2″ 90°, 110°, 120° 3.18 6.35 8.98 14.2 20.1 28.4
NF 100 3/8″, 1/2″ 90°, 110°, 120° 3.53 7.07 9.99 15.8 22.3 31.6
NF 120 3/8″, 1/2″ 90°, 110°, 120° 4.25 8.50 12.0 19.0 26.9 38.0
NF 150 1/2″ 90°, 110°, 120° 5.30 10.6 15.0 23.7 33.5 47.4
NF 200 1/2″ 90°, 110°, 120° 7.07 14.1 20.0 31.6 44.7 63.2

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.

SF

  • BETE SF nozzles provide a easy to install, cost-effective, and adjustable way to set-up spray headers or foam control applications
  • Snaps onto pipe
  • Nozzles can be quickly changed and aligned by hand without tools
Nozzle Type(s):
Whirl
Spray Pattern(s):
Hollow Cone
Flow Range:
.530 to 2.37 gpm
Typical Pressure Range:
5 to 20 psi
Angle Range:
90 - 120°
Common Materials:
Polypropylene

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 10 psi 20 psi 40 psi 60 psi 100 psi
SF 15HC 1″, 1 1/4″, 1 1/2″, 2″ 90° .530 .749 1.06 1.50 1.84 2.37

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.

SF

  • BETE SF nozzles provide a easy to install, cost-effective, and adjustable way to set-up spray headers or foam control applications
  • Snaps onto pipe
  • Nozzles can be quickly changed and aligned by hand without tools
Nozzle Type(s):
Fan
Spray Pattern(s):
Fan
Flow Range:
2.12 to 9.49 gpm
Typical Pressure Range:
5 to 20 psi
Angle Range:
90 - 120°
Common Materials:
Polypropylene

Fan

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 10 psi 20 psi 40 psi 60 psi 100 psi
SF 60 1″, 1 1/4″, 1 1/2″, 2″ 95° 2.12 3.00 4.24 6.00 7.35 9.49

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.

FF

  • Wide angle, deflected flat fan design provides maximum coverage from each individual nozzle
  • Durable one-piece construction
  • Clog resistant
  • Extra wide flat fan spray angle
Nozzle Type(s):
Fan
Spray Pattern(s):
Fan
Flow Range:
.274 to 84.7 gpm
Typical Pressure Range:
5 to 20 psi
Angle Range:
145°
Common Materials:
Brass, 303, 316, PVC, Polypropylene

Fan

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)
3 psi 5 psi 20 psi 40 psi 100 psi 200 psi
FF 073 1/8″, 1/4″ 145° .274 .353 .707 .999 1.58 2.23
FF 093 1/8″, 1/4″ 145° .410 .530 1.06 1.50 2.37 3.35
FF 104 1/8″, 1/4″ 145° .547 .707 1.41 2.00 3.16 4.47
FF 116 1/8″, 1/4″ 145° .656 .847 1.69 2.40 3.79 5.36
FF 125 1/8″, 1/4″ 145° .684 .883 1.77 2.50 3.95 5.59
FF 129 1/8″, 1/4″ 145° .821 1.06 2.12 3.00 4.74 6.70
FF 141 1/8″, 1/4″ 145° .986 1.27 2.54 3.60 5.69 8.05
FF 148 1/8″, 1/4″ 145° 1.09 1.41 2.83 4.00 6.32 8.94
FF 156 1/4″ 145° 1.21 1.56 3.11 4.40 6.96 9.84
FF 161 1/4″ 145° 1.31 1.70 3.39 4.80 7.59 10.7
FF 173 1/4″ 145° 1.48 1.91 3.82 5.40 8.54 12.1
FF 187 3/8″ 145° 1.64 2.12 4.24 6.00 9.49 13.4
FF 196 3/8″ 145° 1.92 2.48 4.96 7.02 11.1 15.7
FF 209 3/8″, 1/2″ 145° 2.04 2.64 5.28 7.46 11.8 16.7
FF 218 3/8″, 1/2″ 145° 2.18 2.82 5.63 7.97 12.6 17.8
FF 221 3/8″ 145° 2.46 3.18 6.35 8.98 14.2 20.1
FF 250 1/2″ 145° 2.88 3.71 7.42 10.5 16.6 23.5
FF 256 1/2″ 145° 3.29 4.25 8.50 12.0 19.0 26.9
FF 281 1/2″ 145° 3.83 4.94 9.88 14.0 22.1 31.3
FF 312 1/2″ 145° 4.38 5.66 11.3 16.0 25.3 35.8
FF 316 3/4″ 145° 4.94 6.37 12.7 18.0 28.5 40.3
FF 332 3/4″ 145° 5.47 7.07 14.1 20.0 31.6 44.7
FF 348 3/4″ 145° 6.03 7.78 15.6 22.0 34.8 49.2
FF 375 1/2″, 3/4″ 145° 6.56 8.47 16.9 24.0 37.9 53.6

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.