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- Mounted outside the digester tank wall and supported on a concrete foundation.
- Designs available to fit existing OTI draft tubes or mixer draft tubes not originally provided by OTI.
- Upper and lower wall intake/discharge nozzles terminate with 45° elbows to promote effective mixing.
- Designs are well suited to add heat exchanger sections as part of the draft tube.
- Commonly combined with digester cover mounted mixers on large digester tanks.
- Directional flow deflector assists in reducing effects of hydraulic turbulence.
- Walkways, handrail, platforms, ladders, steps, etc. are available.
