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Tim Webster introduces EDUR DAF Pumps_thumb

Tim Webster on Edur DAF pumps :

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By using a German built EDUR DAF pump, businesses with wastewater treatment systems can save on capital cost, as well as energy and maintenance costs.

A single “DAF Pump” can replace the entire air bubble system on Dissolved Air Floatation (or “DAF”) plants, according to EDUR pump distributor, Hydro Innovations. Their EDUR® “Multiphase” pumps draw in air through a “snorkel” in the suction line, sheer the air, then feed it into the DAF plant, producing a discharge stream into the tank that is saturated with 30 to 50 micron air bubbles.

A conventional DAF system consists of a wastewater tank, compressor, air saturation vessel, and effluent pump. The effluent pump draws effluent from the tank and pumps it into the air separation vessel. A compressor pumps air into this same vessel. The air/water mixture is “saturated” under pressure, then released back into the wastewater tank at atmospheric pressure where the air comes out of suspension and tiny bubbles form. These then adhere to the suspended matter [fats, oils and other small wastewater particles]. The bubbles, with their attached suspended matter, float to the surface of the tank, where floatables can be skimmed off the surface.

By using EDUR® Multiphase pumps, which can produce their own micro-bubbles, asset owners can do away with the compressor, the air saturation vessel and any control and/ or ancillary components for these items. The reduction of these system components and the simplification of the system design results in lower investment costs and higher operational reliability.

The EDUR® Multiphase [DAF] pump is also an efficient alternative. Energy costs [as well as maintenance costs] of running the compressor are eliminated. There is also no need for constant re-certification of the air saturation vessel, because it is not required in the EDUR system.

EDUR® multiphase pumps can deliver flows from 1 litre per second [for smaller DAF plants] to 15 litres per second [for larger DAF plants] and produce pressures to 12 Bar. A variety of materials and seal arrangements enable EDUR pumps to operate in a very wide range of applications. Available materials include ductile iron, “gunmetal” bronze, stainless steel and super duplex. Mechanical seals available as balanced, double and tandem. For more information on these pumps, Hydro Innovations should be contacted at info@hydroinnovations.com.au or by phone on 0298981800.

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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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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 Torque-Flow (FUB) range of centrifugal pumps have vortex impellers and are capable of handling spherical solids up to 80mm in diameter. They are close-coupled and available with casings of Cast Iron, Ductile Iron or Gunmetal Bronze, impellers of Ductile Iron, Gunmetal Bronze or Stainless Steel, with Stainless Steel shafts (in 2 grades). Some models are available in all Stainless Steel construction. Abrasion-resistant protective linings of ceramic and polyurethane are also available.

Advantages include:

  • Flows to 108 l/s
  • Heads to 55m
  • Handle solids sizes to 80mm
  • Handle temperatures from -50 °C to 180 °C
  • Handle Viscosity to 60cSt
  • Handle solids
  • A variety of mechanical seals available to suit specific applications

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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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EDUR self-priming centrifugal pumps can operate on suction lifts to 7.5 metres and can deliver pressures to 165m. They are able to transfer mildly contaminated water, cooling water, emulsions, oils, and fuels such as kerosine, petrol and diesel.

EDUR self-priming pumps use an integrated jet pump to provide a fast priming function, and they can be supplied as close or long-coupled configurations.

These self-priming pumps are available in Cast Iron, All Bronze, or All Stainless Steel [depending on model] enabling them to pump corrosive fluids including seawater.

Advantages include:

  • Self Priming to 7.5 metres
  • All Iron, All Bronze and All Stainless Steel construction
  • Flows to 83 l/s
  • Heads to 165m
  • Low NPSH values
  • High efficiencies for reduced power consumption
  • Axial thrust-free, open or load-relieved closed impellers
  • Handle temperatures from -40 °C to 90 °C
  • Viscosity up to 115 cSt
  • Single and double mechanical seals available

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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