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DAF Pumps(Dissolved Air Floatation)

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In the dynamic realm of fluid handling innovation, the regenerative turbine pumps crafted by MTH Pump stand as versatile allies, poised to revolutionize a diverse array of scenarios. Notably, their adeptness finds resonance in the realm of Dissolved Air Flotation (DAF) applications, where their distinctive attributes shine brightly. DAF systems, designed to extract contaminants from wastewater through the strategic use of finely dispersed air bubbles, find a powerful collaborator in regenerative turbine pumps.

The remarkable versatility of MTH's regenerative turbine pumps stems from their inherent ability to manage up to 20% entrained vapor—a quality that anchors their role in DAF applications. This capacity is harnessed to generate delicate microbubbles, minuscule in size yet monumental in impact. These ephemeral spheres of air gracefully adhere to particles within the water, effecting a transformative lift that elevates these particles to the water's surface, where they can be systematically skimmed off.

Stepping into the realm of DAF applications with MTH's regenerative turbine pumps is an affirmation of their prowess in fluid management. Navigating the labyrinthine network of these pumps, users are invited to explore the extensive range of standard products, selecting a unit that resonates with the desired flow and capacity parameters for their specific application. Furthermore, the journey extends to the realm of pressure injection, where a comprehensive description of chlorine injection for wastewater treatment awaits.

MTH's commitment to innovation doesn't stop at regenerative turbine pumps; the offering extends to seal-less canned pumps showcased on the Custom Engineered Products page. These specialized solutions are meticulously designed to ensure the safe transfer of chlorine—a testament to the intricate and thoughtful engineering that powers MTH's products.


MTH DAF Product Line

DAF Pump
Model #
Flow Rate* Head (Pressure) 20% Entrained Vapor* RPM TEFC
Motor HP
GPM LPM Feet PSI Meters GPM CFM
MDT31H* 5 19 130 56 40 1 0.13 3450 1/2 HP
MDT41L 10 38 130 56 40 2 0.27 3450 1 HP
MDT51P 20 76 130 56 40 4 0.53 3450 3 HP
MDT51R 30 114 130 56 40 6 0.80 3450 5 HP
MDT161G 50 189 130 56 40 10 1.34 1750 5 HP
MDT162G 65 246 130 56 40 13 1.74 1750 7 1/2 HP
MDT171K 80 303 130 56 40 16 2.14 1750 10 HP
MDT172K 100 379 130 56 40 20 2.67 1750 15 HP

*The MDT31H does not have a built-in injection port. A 3/4" NPT close nipple with a 3/4" NPT tee pipe must be used in front of the inlet for the air inlet.

Disclaimer on DAF System Usage
Please be advised that Dissolved Air Flotation (DAF) systems are generally complex and challenging to operate effectively. Proper use of our pumps within these systems requires the expertise of a mechanical engineer experienced in DAF operations. We emphasize that successful integration and operation of our pumps in a DAF system is dependent on such specialized knowledge.
We will not be held responsible if the customer is unable to get their system to work properly due to a lack of adequate expertise or other operational issues. For more detailed information and specific conditions, please refer to our Standard Terms and Conditions of Sale for more information.

MTH DAF Pump FeaturesDAF Illustration

  • Made in the USA

  • Highly Reliable

  • Air/Gas Dissolved to 20 to 30 Microns

  • All Stainless Cast Construction

  • GLSC/GLSC/Viton Hardfaced Seals

  • Internal Seal Flushlines for Extra Seal Life

  • Small Footprint Design

  • Energy Efficient

  • 1/4” NPT Injection/Vent Inlet Port (Available on most models*)

  • Low Cost, High Value

  • Single Stage and Multi-stage Configurations


DAF Animation

MDT41 DAF PumpAs the symphony of DAF unfolds, the culmination emerges as a buoyant medley—a frothy amalgamation of water, vapor, and particles. This concoction, poised like a mirage atop the tank, becomes a canvas for reclamation and renewal. The skillful skimming of this floating mixture ushers in the prospect of materials being repurposed or removed, orchestrating a simultaneous act of cleaning up the wastewater.

The unique capabilities of regenerative turbine pumps in handling 20%+ entrained vapor bolster their role in the DAF narrative. The sequence commences with the introduction of air, a choreography facilitated through injection or draw at the pump inlet alongside the process fluid—often water. The masterstroke is the turbine impeller's dexterity in fragmenting the introduced air into minute bubbles, a spectacle reminiscent of ethereal tendrils weaving through the water. Guided by this air-water marriage, the mixture embarks on its journey, descending to the depths of a wastewater tank.

As the microbubbles ascend, their natural propensity for amalgamation rekindles, magnifying their presence in the water. This catalytic reunion is abetted by solid materials present in the vicinity, acting as catalysts for the formation of larger, buoyant bubbles. This symbiotic dance between air, water, and particles orchestrates a symphony of buoyancy—a transformative journey that orchestrates the ascent of waste materials towards the surface. This natural buoyancy orchestrates a simultaneous act of cleansing and collection, a choreography that culminates in the skimming of unwanted matter for proper disposal.

DAF extends its embrace to a myriad of domains, from poultry and fish processing to the noble mission of municipal wastewater treatment. In each realm, regenerative turbine pumps, with their innate prowess and precision, contribute to the narrative of responsible water stewardship. They emerge not just as mechanical marvels, but as beacons of environmental consciousness and the advancement of fluid handling technology.


DAF Setup

Through the omission of air compressors, centrifugal pumps, static mixers, relief valves, saturation tanks, and various other components, MTH DAF Pumps offer a streamlined solution that not only simplifies the process but also leads to energy savings and reduced initial expenditures.

This simplicity in design translates into tangible benefits, making MTH DAF Pumps a compelling choice. A simple airline accompanied by a valve and a suction gauge emerges as the quintessential ensemble required to generate the precise fine microbubbles indispensable for the DAF process. This straightforward setup underscores the efficiency and user-friendliness inherent to MTH DAF Pumps, aligning with a commitment to cost-effectiveness and sustainable practices.

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