Tank Mixing/Agitation Nozzles

Tank mixing, blending, agitation, and/or solids suspension through fluid injection or circulation


In many applications it is necessary to keep tank contents mixed or agitated to ensure thoroughly mixed solutions, proper chemical/biological reactions, homogenization of products, sediment build-up prevention, proper draining/pumping, thermal stratification prevention, bacterial growth avoidance, among many other reasons. Conventional mixing in a tank is often thought to require mechanical mixing components, such as a large, motor-driven impeller. However, many applications in which immiscible liquids need to be kept mixed or solids need to be kept suspended may be done so with only a pump and submerged spray nozzles, greatly reducing system complexity, capital cost, and maintenance requirements.
Eductor-3b.jpg
Eductor mixing nozzles (BETE TurboMix) are completely submerged below the liquid in the tank and operate based on the simple premise that when velocity increases, pressure decreases. They are designed to take the velocity of the fluid pumped into the nozzle and convert it into a low pressure zone that induces surrounding liquid in the tank to enter into the nozzle. In this fashion, the pumped fluid is effectively mixed with the tank contents and the amount of fluid that exits the nozzle is three to five times the amount of fluid that is pumped. This multiplier effect allows greater mixing efficiency while using smaller pumping capacity.

Even after liquids are combined, mixing nozzles can be used to agitate the combined fluid. For instance, if the mixture has many solids that are lighter or heavier than the liquid, agitation prevents them from floating or settling. The same is true for liquids of two different densities, or mixtures of oil and water based compounds. Additionally, uniform liquids can become stagnant, fostering bacteria growth, and/or stratify by temperature. Agitating keeps the solids suspended evenly while also preventing bacterial growth via mixing.

The most common setup consists of a pump-around system. The suction side of the pump is connected to the tank and draws off liquid through this pipe. The discharge side of the pump is piped to the nozzle inlet. Liquid is drawn from the tank, through the pump, and into the nozzle where it entrains more liquid and emits from the nozzle. The emitting stream propagates through the tank and keeps the liquid in the tank in motion. With the nozzles correctly located, agitating and mixing occurs without any moving components in the tank. Setups other than pump-around systems are also in widespread use. Fresh feed can be supplied to the nozzle inlet rather than recycling it from the tank. This allows immediate mixing of the fresh feed with the contents of the tank, and then continuous mixing as the exit jet propagates downstream.

Selecting a Tank Mixing Nozzle:

Important factors to consider:

  • Applicable design specifications and mixing requirements
    • Circulation, agitation/solids suspension, mixing/blending, solids sweeping, etc.
  • Required material of construction for abrasive or corrosive environments
  • Size & shape of tank/vessel
  • Available nozzle mounting locations
  • Available/required flow rates
  • Available pressure drop (∆P) across the nozzle
    • ∆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 Tank Mixing Nozzle Uses and Industries:

  • Waste water treatment plants
  • Oil and gas storage tanks
  • Drinking water holding tanks and reservoirs
  • Aerobic & anaerobic digesters
  • Homogenize tank contents when pumping/draining
  • Sweep sludge & sediment from tank bottoms
  • Prevent thermal stratification
  • Blending ethanol and bio-diesel
  • Particulate/solid suspension
  • Transport tankers (ensure delivery of well mixed solutions/products)
  • Chemical injection/mixing
  • Acid/chemical storage tanks
  • Slurry mixing/holding tanks
  • Lake/river water inlets
  • Steam/air injection

TurboMix

  • For submerged applications
  • Circulates 3 to 5 times the amount of fluid being pumped through it
  • No moving parts, no internal parts yield a robust, reliable and clog resistant design capable of handling the most demanding applications
Nozzle Type(s):
Eductor
  • Eductor nozzles operate on the principle that the initial motive jet from the nozzle orifice acts as a venturi and educts additional surrounding fluid through the open area between the orifice and mixing chamber, producing a total fluid discharge from the exit of the mixing chamber of the nozzle that is typically 3 – 5x that of the pumped motive flow rate through the orifice
Spray Pattern(s):
Submerged Jet
Flow Range:
6.96 to 3180 gpm
Typical Pressure Range:
10 to 100 psi
Angle Range:
Common Materials:
Polypropylene, Brass, Carbon Steel, 316

Submerged Jet

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 20 psi 30 psi 40 psi 80 psi 100 psi
TM 70 3/8″ 6.96 9.84 12.0 13.9 19.7 22.0
TM 73 3/8″ 7.27 10.3 12.6 14.5 20.6 23.0
TM 110 1/2″ 11.1 15.7 19.2 22.1 31.3 35.0
TM 120 1/2″ 12.0 17.0 20.8 24.0 34.0 38.0
TM 137 3/4″ 13.6 19.2 23.6 27.2 38.5 43.0
TM 150 3/4″ 14.9 21.0 25.7 29.7 42.0 47.0
TM 230 1″ 23.1 32.6 40.0 46.2 65.3 73.0
TM 240 1″ 24.0 34.0 41.6 48.1 68.0 76.0
TM 320 1 1/2″ 31.9 45.2 55.3 63.9 90.3 101
TM 340 1 1/2″ 34.2 48.3 59.2 68.3 96.6 108
TM 620 2″ 62.0 87.7 107 124 175 196
TM 1500 3″ 150 212 260 300 424 474
TM 2510 4″ 251 355 435 502 710 794
TM 6010 6″ 601 850 1040 1200 1700 1900
TM 10050 8″ 1010 1420 1740 2010 2840 3180

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.

NCK

  • Narrow angle, full cone injector nozzle
  • High emitting velocity
  • Coarse spray
Nozzle Type(s):
Whirl
  • Narrow-angle, axial whirl design provides high velocity, far reaching plume
Spray Pattern(s):
Full Cone
Flow Range:
40.9 to 2600 gpm
Typical Pressure Range:
10 to 100 psi
Angle Range:
15 - 30°
Common Materials:
Polypropylene, PTFE, Brass, 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)
10 psi 20 psi 40 psi 60 psi 80 psi 100 psi
NCK 48 2″ 15°, 20°, 30° 56.7 78.5 109 132 151 167
NCK 72 2 1/2″ 15°, 20°, 30° 85.0 118 163 197 226 251
NCK 105 3″ 15°, 20°, 30° 124 172 238 288 330 367
NCK 190 4″ 15°, 20°, 30° 225 311 431 521 597 663
NCK 350 6″ 15°, 20°, 30° 413 572 793 959 1100 1220

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.