How to successfully use the simpler & better EDUR DAF pump system

The Disadvantages with Traditional DAF Pumping Systems

Traditional DAF (Dissolved Air Flotation) pumping systems have so many moving parts. The components include an air compressor, pressure vessel, centrifugal pump and of course the controller to get all three components to work harmoniously.

The disadvantages of such a complicated system are many. For one, the pressure vessel requires regular certification and records must be kept. The controller needs monitoring. The maintenance time and costs for the many components can be costly.

refrigerant pump

How our EDUR DAF Pump System Can Eliminate these Disadvantages

When one of the largest Chicken processors in Australia wanted to eliminate these complications, and install a more reliable system that requires no controls and is set and forget, they approached Hydro Innovations. The technical staff at Hydro have a combined 80 years of experience in the pump industry. The knowledge of the team is second to none.

After consultation, an EDUR LBU 404 C120L with 5.5kW motor was installed. The EDUR multi-phase pump produces consistent fine micro bubbles perfect for the operation of a DAF tank. The EDUR pump has the unique ability to draw atmospheric air into the suction line, shear it, mix it with the water being drawn from the “clean” end of the DAF tank, and saturate the air into the water [by pressurising it].

The EDUR pump eliminates the need for a compressor, control system, conventional pump, air saturation vessel (and ongoing certifications). The pressure vessel can be removed or bypassed, or they can be incorporated it into the new system.

The Simplicity of the EDUR DAF Pump System

Because of the simplicity of the system, operators will see an improvement in energy consumption [because they are not running compressors] and a vast improvement in maintenance costs. There is no pressure vessel to continually certify, no compressor to maintain, and no more complicated control system to operate. Just “set and forget”.

With the pump running at 10m3 per hour and circulating approximately 10% of the inflow to the DAF tank, the plant has been running free of maintenance and interference for over 4 years.

Speak to Hydro Innovations today to simplify and improve your DAF system with EDUR multi-phase pumps. Hydro Innovations are the exclusive agents for the Edur multi-phase DAF pump.

Both canned motor-pumps and EDUR magnetically coupled pumps have low NPSHr, but because of their “diffuser devices”, EDUR pumps handle some evaporation of refrigerants reliably.

Ready to build the perfect pump system for your project? We’re standing by to help.

EDUR pumps:

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The EDUR LBU multiphase pump is a multi-stage centrifugal pump with the unique capability of being able to pump a liquid/gas mixture. The centrifugal pump is constructed of either C.I./ Bz/ SS, Nodular Cast Iron, All-Bronze, Stainless Steel, or Super-Duplex Stainless-Steel construction, so may be used to handle a variety of liquids.

Air, Oxygen, Carbon Dioxide and Ozone gases can be introduced into the suction line and transported and used to mix or disperse the gases. This makes the pump ideal for DAF plants, where the multiphase pumps provide the task of air saturation without the use of compressed air (no compressor, air saturation tank or associated controls).

Advantages include:

  • Flows to 16 l/s, able to treat DAF tank inflows up to 150 L/s with a single pump.
  • Pressures to 12 bar
  • Operating pressure max. 40 bar
  • Handle temperatures from -50 °C to 140 °C
  • Gas contents up to 30 %
  • Up to 115 cSt
  • Cast iron/Bronze/Stainless steel, Nodular cast Iron, All-Bronze, Stainless Steel, or Super-Duplex Stainless Steel construction
  • Completely replace the “old” DAF system with a single pump
  • No compressor needed on DAF systems
  • No Air-Saturation [pressure] Vessel needed on DAF systems

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The EDUR PBU multiphase pump is a single-stage peripheral centrifugal pump with the unique capability of being able to pump a liquid/gas mixture. The centrifugal pump is constructed of stainless steel, so may be used to handle a variety of liquids. Air, Oxygen, Carbon Dioxide and Ozone gases can be introduced into the suction line and transported and used to mix or disperse the gases. This makes the pump ideal for DAF plants, where the multiphase pumps provide the task of air saturation without the use of compressed air (no compressor, air saturation tank or associated controls).

Advantages include:

  • Flows to 4.0 l/s, suiting DAF inflows to 40 litres per second
  • Pressures to 9 Bar
  • Operating pressure max. 16 bar
  • Temperature -40 °C to 140 °C
  • Gas contents up to 15%
  • Viscosity up to 115 cSt
  • Stainless steel construction
  • Completely replace the “old” DAF system with a single pump
  • No compressor needed on DAF systems
  • No Air Saturation [Pressure] vessel needed on DAF systems

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Designing pumps since 1927, EDUR Pumpenfabrik has developed a range of pumps for use in refrigeration systems. They have been designed to provide a maximum level of safety, reliability and efficiency. They are the safe option because they use standard TEFC motors, which don’t need to be cooled using the pumped media. They are efficient because they use magnetic couplings. By using magnetic couplings energy is not wasted by pumping fluid over the motor [as with “canned motor pumps”] and back through to the separator.

Advantages include:

  • Flows to 18 l/s
  • Heads to 300m
  • Operating pressure max 40 bar
  • Handle temperatures from -50 °C to 220 °C
  • Handle Viscosity to 115 cSt

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The EDUR range of multi-stage centrifugal pumps can deliver flows to 45 litres per second and heads to 300 metres. They are also available in a variety of materials (Cast Iron, All Bronze, All Stainless Steel and Super-Duplex) enabling them to pump corrosive fluids including seawater. These centrifugal pumps are ideal for booster systems, boiler feed and condensate systems, washing plants, water treatment and hardening systems.

Pumps can be close or long-coupled. Advantages include:

  • All Iron, All Bronze, All Stainless Steel and Super-Duplex construction
  • Flows to 16 l/s
  • Head: max. 300 m
  • Discharge pressure: max. 21,4 bar
  • Operating pressure: max. 40 bar
  • Handle temperatures -50 °C to 160 °C
  • Viscosity: The NH series are able to handle media with a viscosity up to 200 cSt, while the other series of multistage centrifugal pumps can handle viscosities up to 115 cSt
  • Single and double mechanical seals available along with gland packing and water cooled gland packing

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Introducing EDUR Liquefied Gas Pumps – powerful, space-efficient pumps designed for delivering liquefied gases in high-pressure environments. These pumps consistently meet the most stringent standards, ensuring reliable and secure operation while delivering exceptional efficiency throughout the entire process.

EDUR liquefied gas pumps play a crucial role at various stages of the transportation process. Their versatility is evident in applications spanning tank plants, tank trucks, refrigeration installations, the beverage industry, process technology, and even ship building.

Advantages include:

  • Nodular Cast Iron or All Stainless Steel construction
  • Flows to 47 l/s
  • Heads to 300 m
  • Handle temperatures from -50°C to 110°C
  • Handle Viscosity to 200 cSt

Ask Our Team

Download the Brochure | Ask Our Team

The EDUR range of Industry Bloc close-coupled centrifugal pumps are ideal for pumping water and other clean and slightly polluted fluids. They are compact in size, and available in a variety of materials of construction including cast iron, bronze and stainless steel.

Motors are either 2 pole or 4 pole, with IP55 enclosures, and insulation class F.

Advantages include:

  • Flows to 166 l/s
  • Heads to 98m
  • Handle temperatures from -50 °C to 140 °C
  • Handle viscosity to 200 cSt
  • Handle solids content

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Hydro’s experts are standing by to help you get the best pump, aerators and genuine spare parts for your specific project.

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Hydro Innovations is proud to distribute a broad range of quality, reliable and industry-leading industrial pumps and aerators.

We are also delighted to share that Hydro Innovations is proud to be the exclusive distributor of Gorman-Rupp Pumps.

Gorman-Rupp is the world leader in self-priming centrifugal wastewater pump technology, and invests heavily in R&D, and in training for their international representatives – like Hydro Innovations.

This puts us in an excellent position to make the very best recommendations for our Australian customers.

Our other suppliers, Ragazzini of Italy and EDUR of Germany, are also world leaders in their respective technologies (Peristaltic Pumps – Ragazzini, and Specialist centrifugal pumps – EDUR).

We carry a very large inventory of pumps and spare parts for all of these brands, to help us to deliver industry-leading service.

Ready to build the perfect pump system for your project? We’re standing by to help.

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