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  • Offer Profile
  • EDUR is your specialist for individual centrifugal pumps. As a developer and manufacturer of centrifugal pumps, we produce custom-fit pumps for your application.

    At the same time, we act as a competent consultant and technology partner with international orientation and comprehensive service for our customers.

Product Portfolio
  • CENTRIFUGAL PUMPS FROM SCHLESWIG-HOLSTEIN

    • EDUR pumps are available in many different versions and are always configured according to the customer's individual requirements. Detailed information on the individual pump types can be found on the respective subpages in this section.
        • SINGLE-STAGE BLOCK PUMPS

        • Our single-stage block pumps are particularly robust and economical pumps with a long service life. They are characterised in particular by their compact design, their wide range of applications and their customer-specific design options.

          Areas of application and pumping media

          Our single-stage close-coupled pumps are used in many different ways depending on customer requirements: They are used in refrigeration technology, energy technology, industrial cleaning technology as well as water and wastewater technology, among others. The pumps are particularly suitable for pumping pure or slightly contaminated liquids.

          Variants of the single-stage EDUR block pump

          We offer single-stage block pumps with our proven NUB series. The pumps are available in many design and material variants (such as grey cast iron, nodular cast iron, bronze or stainless steel) as well as with various shaft sealing systems and drive solutions. We will be pleased to implement customer-specific configurations for you as required. Special approvals of all classification societies and factory certificates are of course possible.

          Product advantages

          Our single-stage block pumps belong to a proven pump type that is characterized by its efficient, economical, reliable and durable use. In addition, there are further product advantages as well as technical characteristics which are listed below:

          Technical superiority

          • Variety of sealing systems
          • Large selection of materials
          • Low NPSH values
          • Thrust-free open or relieved closed wheels
          • Compensation of the radial forces by guiding devices in the ring housing
          • Energy-efficient motors

          Process safety

          • Insensitive to small amounts of solid matter
          • Protection against dry running possible
          • Vacuum operation possible
          • Low pulsation delivery
          • Additional safety through the use of monitoring equipment
          • Low noise emissions
          • Long service life

          High energy efficiency

          • Low flow velocity in the discharge port
          • Low speed altitude difference

          Ease of assembly

          • Modular system for customer-specific solutions
          • Compact block design / low space requirement
          • Different mounting positions

          Easy maintenance

          Field of application

          • Delivery rate max. 600 m³/h
          • Permissible operating pressure up to 16 bar
          • Temperature -40° C to +140° C
          • Viscosity up to 200 mm²/s
        • SINGLE-STAGE INLINE PUMPS

        • EDUR single-stage inline pumps are particularly space-saving, robust and efficient. Due to their reliability they have been successfully used in many industrial sectors for decades.

          Fields of application and pumping media

          Our single-stage EDUR pumps in in-line design are used in particular in refrigeration technology, energy technology, industrial cleaning technology, water and wastewater technology or even in industrial engineering. Here they are mainly used to pump pure or slightly contaminated liquids.

          Variants of the single-stage EDUR in-line pump

          We offer single-stage inline pumps with our LUB series. They are made of grey cast iron and are available in many design and drive variants with single mechanical seal. We will be pleased to implement customer-specific configurations for you as required. In addition, special approvals of all classification societies and factory certificates are of course possible at any time.

          Product advantages

          Like all EDUR pumps, our single-stage inline pumps are characterized by their efficient, economical, reliable and durable operation. Compared to the conventional block pump, they are also a particularly space-saving alternative. In addition, there are further product advantages as well as technical characteristics which are listed below:

          Technical superiority

          • Thrust-free open or relieved closed wheels
          • Compensation of the radial forces by guiding devices in the ring housing
          • Low NPSH values

          Process safety

          • Protection against dry running possible
          • Vacuum operation possible
          • Excellent control behaviour

          High energy efficiency

          • Low flow velocities
          • Low speed altitude differences

          Ease of assembly

          • Modular system for customer-specific solutions
          • Compact block design / low space requirement Pullback design
          • Removal clutch optional

          Field of application

          • Delivery rate max. 220 m³/h
          • Permissible operating pressure up to 16 bar
          • Temperature -40° C to +140° C
          • Viscosity up to 200 mm²/s
        • MULTISTAGE CENTRIFUGAL PUMPS

        • EDUR multistage centrifugal pumps are used to achieve high delivery pressures. The compact sectional construction in horizontal or vertical design is particularly characteristic.

          Fields of application and media to be pumped

          The main areas of application for multistage centrifugal pumps are mainly in water technology, energy technology, industrial cleaning technology and refrigeration technology as well as in the field of liquid gas applications. They are used in particular where higher delivery pressures are required and are suitable for pumping pure or slightly contaminated liquids.

          Variants of the EDUR multistage centrifugal pump

          Multistage centrifugal pumpsMulti-stage centrifugal pumps are offered with our LB, VB, NH and Z series. They are available in horizontal and vertical ring-section design as well as in many design and material variants such as cast iron, bronze or stainless steel. They can also be designed with various shaft sealing systems and drive solutions. We will be happy to implement customer-specific configurations for you. Special approvals of all classification societies and factory certificates are possible at any time.

          Product advantages

          Like all EDUR pumps, our multistage centrifugal pumps are characterized by their efficiency, economy and reliability. In addition, there are further product advantages as well as technical characteristics which are listed below:

          High energy efficiency

          • Low flow velocities in the discharge port
          • Low speed altitude differences

          Technical superiority

          • Variety of sealing systems
          • Thrust free open wheels or thrust relieved closed wheels
          • Compensation of the radial forces by guiding devices in the ring housing

          Process safety

          • Partial gas delivery possible
          • Excellent control behaviour
          • Low NPSH values (up to 0.5 m)

          Ease of assembly

          • Large nominal flange sizes

          Easy maintenance

          Technical data

          • Delivery rate max. 170 m³/h
          • Permissible operating pressure up to 40 bar
          • Temperature -40° C to +220° C
          • Viscosity up to 115 mm²/s
        • MULTISTAGE INLINE PUMPS

        • EDUR multistage inline pumps are characterized by their compact and above all vertical design. They are particularly used to achieve high delivery pressures.

          Fields of application and media to be pumped

          Our multi-stage EDUR inline pumps are used in a wide range of applications. They are used, for example, in water technology, refrigeration technology, energy technology and industrial engineering. They are particularly used where higher delivery pressures are required and are suitable for pumping pure or slightly contaminated liquids.

          Variants of the EDUR multistage in-line pump

          Our proven series for multistage inline pumps are called CV and ECV. The pumps in vertical design are made of stainless steel (V2A and V4A). The shaft seal is available as single or double mechanical seal. We will be pleased to implement customer-specific configurations for you as required. In addition, special approvals of all classification societies and factory certificates are possible at any time.

          Product advantages

          Like all EDUR pumps, our multistage inline pumps are characterized by their efficiency, economy and reliability. In addition, there are further product advantages as well as technical characteristics which are listed below:

          Technical superiority

          • axle shear-balanced wheels
          • Various material combinations
          • Wide range of connection variants (flange, clamp, etc.)

          Process safety

          • Easy exchange through standardization
          • Drinking water approval on request

          Easy maintenance

          • Removal of the mechanical seal without dismantling the motor lantern piece
          • Optional: Cartridge seals

          Technical data

          • Temperature -30° C to +140° C
          • Permissible operating pressure up to 30 bar
          • Viscosity up to 115 mm²/s
        • FREE FLOW PUMPS

        • Free-flow pumps are a compact and cavitation insensitive pump design. They are particularly suitable for the gentle transport of solids-laden media.

          Areas of application and pumped media

          EDUR free-flow pumps are used in particular in water and sewage technology as well as in industrial cleaning technology. Our free-flow pumps are used both for pumping solids-laden liquids and for pumping suspensions. Typical pumping media are e.g.

          Waste water

          cooling lubricants, grinding oils or washing lyes interspersed with chips
          Milk of lime
          Media that are transported gently in liquids.
          Variants of the EDUR free-flow pump
          We offer free flow pumps with the FUB and CBF series. Our free flow pumps in compact block design are available in many design and material variants such as cast iron or stainless steel and can be configured with different sealing systems and drive solutions. We will be pleased to implement customer-specific requirements for you. In addition, special approvals from all classification societies and factory certificates are possible at any time.

          Product advantages

          Like all EDUR pumps, our compact free-flow pumps are characterised by efficiency, economy and reliability. In addition, there are further product advantages as well as technical characteristics which are listed below:

          Technical superiority

          • Pulse transmission through reset vortex impeller
          • Free ball passage up to 80 mm diameter
          • Optional: Wear coatings

          Process safety

          • Conveyance of solids
          • Single and double mechanical seal
          • Insensitivity to cavitation
          • Gentle product conveyance
          • Insensitive to plait and ball formation

          Ease of assembly

          • Different mounting positions
          • Compact block construction

          Easy maintenance

          • Pull-back structure
          • Robust design

          Technical data

          • Delivery rate max. 270 m³/h
          • Permissible operating pressure up to 16 bar
          • Temperature -40° C to +180° C
          • Viscosity up to 60 mm²/s
          • Solids content up to 15
        • SELF-PRIMING CENTRIFUGAL PUMPS

        • Self-priming EDUR centrifugal pumps are particularly suitable for slightly contaminated and gassing liquids. Due to their characteristic design, they can also suck in and convey deeper lying liquids without any problems.

          Application areas and pumping media

          The main areas of application of the self-priming centrifugal pumps can be found in the. energy technology, water and waste water technology, refrigeration technology, industrial technology and in the field of liquid gas applications.

          In contrast to normal-priming pumps, the self-priming centrifugal pumps are able to vent the suction line and automatically suck in liquids lying deeper. Gassing media are also reliably pumped. The pumps are characterised by short suction times and high efficiency for trouble-free and reliable operation. Special emphasis was placed on air flow rate and wear resistance.

          EDUR self-priming pumps are suitable for pumping slightly contaminated water, cooling water, emulsions, oils and fuels such as kerosene, petrol or diesel.

          Variants of self-priming EDUR centrifugal pumps

          Self-priming centrifugal pumpsSelf-priming centrifugal pumps are available from us in the S, SUB and E series. The pumps are available in many design and material variants (grey cast iron, bronze or nodular cast iron) and with different sealing systems and drive solutions. We will be happy to implement customer-specific configurations for you as required. In addition, special approvals of all classification societies and factory certificates are possible at any time.

          Product advantages

          Like all EDUR pumps, our multistage centrifugal pumps are characterized by their efficiency, economy and reliability. In addition, there are further product advantages as well as technical characteristics which are listed below:

          High energy efficiency

          • Integrated jet pump or mixture formation
          • Low flow velocities
          • Low internal friction losses
          • Low NPSH values

          Technical superiority

          • Thrust-free open or relieved closed wheels
          • Compensation of the radial forces by guiding devices in the ring housing

          Process safety

          • Self-priming
          • Partial gas delivery possible

          Ease of assembly

          • Horizontal execution
          • Block or base plate design

          Technical data

          • Delivery rate max. 170 m³/h
          • Permissible operating pressure up to 16 bar
          • Temperature -40° C to +90° C
          • Viscosity up to 115 mm²/s
        • MULTIPHASE PUMPS

        • EDUR multiphase pumps are specially designed for integrated liquid-gas mixture pumping and the generation of dispersions. They enable the pumping of up to 30% gas content.

          Applications and pumping media

          The EDUR multiphase pumps are used in the fields of water and sewage technology as well as in industrial engineering. The multiphase pumps are used to pump liquid-gas mixtures and to enrich liquids with gases such as air, oxygen or ozone.

          Functionality

          The pump hydraulics differ considerably from conventional centrifugal pumps in design and operation, thus allowing operation with throttling on the suction side without the cavitation that occurs with standard centrifugal pumps. Gas components of up to 30% are sucked in automatically and are safely conveyed along. In addition, dynamic mixing and excellent gas saturation are achieved.

          Variants of the EDUR multiphase pumps

          Multiphase pumps are also called flotation pumps, DAF pumps or (gas) saturation pumps. Our series for multiphase pumps are the PB and LB series. They are available in many design and material variants, such as cast iron, bronze or stainless steel, and with various shaft sealing systems and drive solutions. We will be pleased to implement customer-specific configurations for you as required. In addition, special approvals from all classification societies and factory certificates are possible.

          Product advantages

          When choosing EDUR multiphase pumps, expensive compressor systems, pressure vessels, controls, valves and the corresponding maintenance are no longer required. Gaseous media can be supplied directly at the pump in a partial flow process. The special open and axial thrust free impeller design makes this possible.

          Like all EDUR pumps, our multiphase pumps are characterised by their efficiency, economy and reliability. We would also like to emphasize the following product advantages as well as technical characteristics:

          Innovative delivery concept

          • Excellent gas saturation
          • Gas contents of up to 30% are automatically sucked in and safely conveyed
          • Dynamic mixing
          • Ideal dispersion with bubble sizes between 30 and 50 µm
          • Excellent bubble pattern ("white water")

          Savings potential

          • Significant reduction of system components (compressor, pressure vessel, complex control system and various valves are no longer required)
          • High process reliability - minimum downtimes
          • Low investment costs
          • Insensitive to wear even with light contamination
          • Reduced maintenance and service effort
          • Low operating costs
          • Retrofit of existing plants

          High energy efficiency

          • Low flow velocities
          • Low internal friction losses
          • Low NPSH values

          Ease of assembly

          • Modular system for customer-specific solutions
          • Compact block design / low space requirement

          Technical superiority

          • Direct gas entry into the suction line
          • Energy-efficient motors
          • Low noise operation

          Interpretation

          • Optimum pump selection by our specialist engineers

          Technical data

          • Delivery rate max. 60 m³/h
          • Permissible operating pressure up to 40 bar
          • Gas entrainment up to 30%
          • Temperature -40° C to +140°C
          • Viscosity up to 115 mm²/s
        • LIQUEFIED GAS PUMPS

        • Our liquid gas pumps are compact high-performance pumps for liquefied gases for controlled delivery at large pressure differences. They reliably and safely meet the highest requirements and achieve very high efficiencies.

          Requirements, areas of application and media to be pumped by the liquefied gas pumps

          EDUR liquid gas pumps are required for unloading, refuelling, pumping and filling operations. The requirements for a liquid gas pump are high. These include among others Large pressure differences, mixture delivery, low NPSH values, low pulsation delivery, low noise emission and ATEX conformity. The user of liquid gas pumps expects safe delivery of liquid-gas mixtures, control of outgassing and fluctuations in vapour pressure and increasingly high pump efficiencies. The high efficiency of the LPG pump results in low energy consumption, smaller drive units and relatively compact pumps.

          Our liquid gas pumps are versatile. They are mainly used in tank farms, tank trucks, refrigeration plants, industrial plants, in the beverage industry and in process technology as well as in shipbuilding and ensure safe distribution in industry as well as to private consumers. Our liquefied petroleum gas pumps are currently used in particular to pump LPG (liquefied petroleum gas) gases such as butane, propane or their derivatives.

          Variants of EDUR liquid gas pumps

          Liquid gas pumps are often also found behind the terms LPG pumps, LNG pumps, CO2 pumps or tank truck pumps. Our series for liquid gas pumps include the S, LB and NH series.

          The pumps are available as a modular system in many design and material variants, such as nodular cast iron or stainless steel, and with various shaft sealing systems and drive solutions (explosion-proof motors or hydraulic drive). We will be pleased to implement customer-specific configurations, such as versions with containment vessel temperature monitoring, as required. Furthermore, special approvals of all classification societies and factory certificates are possible at any time.

          Product advantages

          Like all EDUR pumps, our liquid gas pumps are characterized by their efficiency, economy and reliability. We would also like to emphasize the following product advantages and characteristics:

          Low operating costs

          • Very high efficiencies

          Process safety

          • Partial gas production
          • Large operating range
          • Suction and inlet operation possible
          • High nominal pressures
          • Low NPSH values
          • Cavitation-free operation ensures full pumping capacity
          • ATEX approval
          • Ex-protected motors according to customer specifications
          • Low pulsation delivery
          • Low noise emission
          • Long service life
          • Highest security
          • Simple handling
          • Easy maintenance

          Technical superiority

          • Thrust-free open or relieved closed wheels
          • Compensation of radial forces by combination of bladed guide wheel and ring casing
          • Single or double-acting mechanical seals or optionally magnetic couplings
          • Energy-efficient motors

          Ease of assembly

          • Modular system for customer-specific solutions
          • Compact block or base plate design / small space requirement

          Interpretation

          • Optimum pump selection by our specialist engineers

          Field of application

          • Delivery rate max. 170 m³/h
          • Permissible operating pressure up to 40 bar
          • Temperature -40° C to +110° C
          • Viscosity up to 115 mm²/s
        • INSERTION PUMPS

        • EDUR submersible pumps are located directly in the pumped medium and are ideally suited for the reliable transport of aggressive media, because: They are convincing in terms of process reliability due to the guaranteed exclusion of leakage.

          Application areas and media to be pumped

          Our submersible pumps are universal pumps. They are used where, for reasons of space, poor inlet conditions or critical pumping media, dry-installed pumps cannot be used. The main areas of application are in power engineering and cleaning technology. Possible pumping media of EDUR immersion pumps are pure or slightly contaminated liquids. Typical applications for our submersible pumps are e.g. pretreatment plants for surface technology in which hot aggressive liquids are circulated.

          Variants of EDUR submersible pumps

          Our series for submersible pumps are the CTOL and FTUL series. The immersion pumps are available in many design and material variants (grey cast iron or stainless steel) and with single-acting mechanical seal or without shaft seal. They have a modular design for a wide range of impeller shapes and pressure ranges. We will be pleased to implement customer-specific configurations for you as required. In addition, special approvals of all classification societies and factory certificates are possible at any time.

          Product advantages

          Like all EDUR pumps, our submersible pumps are characterised by their efficiency, economy and reliability. We would also like to emphasize the following product advantages and characteristics:

          High process reliability

          • Low NPSH values
          • Optional with vortex impeller

          Ease of assembly

          • Modular system for customer-specific solutions
          • Compact design / low space requirement

          Interpretation

          • Optimum pump selection by our specialist engineers

          Technical data

          • Delivery rate max. 300 m³/h
          • Permissible operating pressure up to 16 bar
          • Temperature -25 °C to + 90 °C
          • Viscosity up to 200 mm²/s

          Special designs for other conditions possible

        • MAGNETIC DRIVE PUMPS

        • EDUR magnetic drive pumps are particularly suitable for the reliable transport of toxic, environmentally hazardous or explosive fluids. Leakages are excluded by the hermetic sealing of the magnetic coupling.

          Fields of application and pumped media

          Magnetic drive pumps from EDUR are used particularly frequently in the fields of refrigeration, liquid gas, energy technology and industrial engineering. Magnetic drive pumps from EDUR can be used to pump clean or slightly contaminated water without any problems, but are particularly suitable for pumping toxic, environmentally hazardous and explosive liquids as well as for high-temperature applications.

          The drive torque of the motor is transmitted to the pump shaft by magnetic field forces. A containment can hermetically separates the pump interior from the atmosphere. The pump shaft is supported in medium-lubricated plain bearings. Leakage, which is common with conventional shaft seals, is therefore impossible.

          Variants of EDUR magnetic drive pumps

          Magnetic drive pumps or magnetic coupled pumps are often also called "Hermetic pumps". Our series for this type of pump are the PBM, LBM, NHM and NMBL series.

          The EDUR modular system allows a maximum of flexibility in terms of configurations for these pumps as well. Our pumps are available in many design and material variants (grey cast iron, nodular cast iron, bronze or stainless steel) and with various drive solutions. We will be happy to implement customer-specific configurations (such as a supplementary containment can monitoring) for you as required. In addition, special approvals of all classification societies and factory certificates are possible at any time.

          Product advantages

          Like all EDUR pumps, our magnetic drive pumps are characterised by their efficiency, economy and reliability. We would also like to emphasize the following product advantages and characteristics:

          Process reliability

          • High energy efficiency through low-loss / free magnetic couplings
          • Tested complete unit
          • Easy maintenance
          • Hermetically sealed
          • Absolutely wear-free
          • High operational reliability
          • Long service life
          • ATEX approval on request

          Ease of assembly

          • Modular system for customer-specific solutions
          • Compact design / low space requirement

          Technical data:

          • Delivery rate max. 600 m³/h
          • Permissible operating pressure up to 40 bar
          • Temperature -40°C to 220°C (to -50°C on request)
          • Viscosity up to 200 mm²/s
        • INDIVIDUAL CENTRIFUGAL PUMPS

        • Are you still looking for the right pump for your application? We would be happy to advise you and develop your best pump solution together with you!

          THE RIGHT EDUR CENTRIFUGAL PUMP

          EDUR pump specialists will be pleased to advise you from the planning phase onwards. Even when revising your existing systems, great potential for improvement can be achieved.

          Our centrifugal pumps cover a very wide range of products and are available in many design and material variants with different sealing systems and drive solutions. We will be pleased to implement your individual wishes and requirements and will be at your side from the inquiry to the installation and of course beyond.

      • APPLICATIONS

        • The fields of application of our pumps are - just like our pumps themselves - diverse. In the course of time, we have built up valuable knowledge in the following applications and have developed into a reliable partner for our customers through the optimal design of our pumps.
            • ENERGY TECHNOLOGY

            • Energy technology deals with the most diverse methods and processes for the generation, distribution, storage and use of energy. The possible applications for centrifugal pumps in power engineering cover a wide spectrum.

              CENTRIFUGAL PUMPS IN INDUSTRIAL POWER ENGINEERING

              Energy technology deals with the most diverse methods and processes for the generation, distribution, storage and use of energy. The possible applications for centrifugal pumps in power engineering cover a wide spectrum. In addition to the classic applications such as heating, heat distribution and cooling of aggregates, these also include applications in energy storage systems, biogas plants, heat recovery systems and fuel cells, for example.

              The technical challenges are very diverse: The required volume flows, pressures and the demands on materials and sealing systems are very different and individual. Our aim is to improve the optimum yield of the energy to be introduced into a process or circuit and its efficiency.

              USE OF EDUR CENTRIFUGAL PUMPS IN POWER ENGINEERING

              EDUR centrifugal pumps for power engineering are characterized by a compact pump design, with axial thrust free open or closed impellers. A large part of the radial forces are reduced by the EDUR special guiding devices. This has a positive influence on the lifetime of the mechanical seal, the bearings and the drive motor.

              Due to the very low NPSH values, even media that are close to boiling point can be pumped safely. Centrifugal pumps from EDUR are therefore also capable of handling media containing vapour and thus offer a high degree of operational safety. For media that are classified as environmentally hazardous or toxic, EDUR magnetic drive pumps are used. The most different mechanical seal systems are determined by the corresponding applications. EDUR centrifugal pumps are used as block pumps or inline pumps. The centrifugal pump can be used as single-stage or multistage pump.

            • LIQUID GAS

            • Centrifugal pumps play an important role in the production of liquefied gases and in the transport, storage and distribution of liquefied gases. The advantage of liquefied gases is that they are relatively easy to transport and store - unlike in the gaseous state of aggregation. Liquefaction is achieved by compression or cooling. If required, the liquefied gas then becomes gaseous again by expansion and can be supplied to the consumer by means of pumps.

              LIQUEFIED GASES

              A distinction is made primarily between LPG gases (liquefied petroleum gas) and LNG gases (liquefied natural gas). Representatives of the LPG gases are mainly butane, propane and their derivatives, which are used as fuel gas and fuel for heat generation and are produced both during oil and gas extraction and in oil refineries. LNG gas or liquefied natural gas, mainly methane, is also used as fuel gas.

              DIN 51622 lists all the different liquid gases. For example, ammonia is used in cooling plants or CO2 in the process industry and beverage production.

              USE OF EDUR LIQUEFIED GAS PUMPS

              The pump manufacturer EDUR offers liquid gas pumps that are used in manufacturing processes and in the transport, storage and distribution of liquefied gases. This is made possible by the centrifugal pumps' ability to convey gas. Due to their low NPSH values, the pumps guarantee cavitation-free operation and thus full pumping capacity in both suction and feed operation. The EDUR liquid gas pumps can be designed according to Atex: Various adapted sealing systems such as double mechanical seals or hermetic magnetic couplings ensure the necessary safety.

            • REFRIGERATION TECHNOLOGY

            • EDUR centrifugal pumps in refrigeration technology have been used successfully in industry for decades. They are important components in the cooling process and offer a maximum of safety, reliability and efficiency and are designed for high loads and extreme temperature ranges. In addition, EDUR pumps guarantee process reliability even with critical media such as CO2 or ammonia.

              CENTRIFUGAL PUMPS IN REFRIGERATION TECHNOLOGY

              Refrigeration technology deals with methods and processes for the generation of cold. The refrigeration processes required for this are based on different physical effects, all of which essentially focus on the cyclical phase change of a refrigerant in the refrigeration machine.

              USE OF EDUR CENTRIFUGAL PUMPS IN REFRIGERATION TECHNOLOGY

              Industrial refrigeration covers a wide range of different applications in refrigeration technology. As a rule, systems with a larger capacity from approx. 200 m³/h compressor intake volume are required for this. Typical areas of application for pumps in refrigeration technology are found in food processing, slaughterhouses, dairy technology, the beverage industry, breweries, the pharmaceutical industry, deep-freeze warehouses and the chemical industry.

              Basically, centrifugal pumps in refrigeration systems are classified according to the type of medium to be pumped. Depending on the design and size of the system, there are refrigerant pumps and refrigerant pumps.

              The EDUR pumps for refrigerants are characterized by their compact pump design, axial thrust free open or closed and balanced impellers as well as guiding devices in the ring casing, which absorb a large part of the radial forces. The overall design has a positive influence on the service life of the mechanical seal and the roller bearings in the drive motor. To prevent freezing condensation water from damaging the mechanical seal, EDUR pumps are designed with anti-icing protection at very low temperatures of the pumped medium.

              Refrigerant pumps are very often magnetic drive pumps which hermetically seal the refrigerant from the atmosphere. The advantage over canned motor pumps is the spatial separation of the drive motor from the pump, which prevents heat from entering the pumped medium, i.e. the refrigerant. This separation therefore has a positive effect on the energy balance of the entire refrigeration system.

              Furthermore, EDUR refrigerant pumps are characterised by very low NPSH values, which has a positive effect especially with refrigerants at boiling point. In addition, EDUR centrifugal pumps, in comparison to volute casing pumps, are basically able to transport certain gas components in the pumped medium through the control system. This has the advantage, especially with refrigerants, that the slight evaporation is safely controlled by the refrigerant.

            • CLEANING TECHNOLOGY

            • The cleaning and degreasing of components using centrifugal pumps mainly involves the removal of dirt, grease or other residues. Over the years, EDUR centrifugal pumps have proven to be an important component of cleaning systems.

              CENTRIFUGAL PUMPS IN CLEANING TECHNOLOGY

              Apart from the daily washing of laundry in private households, you can find in modified form in almost all branches of industry partly highly complex cleaning machines for any kind of cleaning of surfaces and objects. Classical applications of cleaning technology can be found, for example, in component cleaning, metal cleaning, crate and bottle cleaning or in medical technology. Centrifugal pumps are an important component of these cleaning systems in order to efficiently transport the cleaning medium used to these surfaces and objects. By using centrifugal pumps hydraulically, certain components are cleaned of the contaminants by rinsing, watering, immersion or high-pressure spraying.

              USE OF EDUR CENTRIFUGAL PUMPS IN CLEANING TECHNOLOGY

              EDUR centrifugal pumps have become decisive system components for leading manufacturers of cleaning systems in order to transport the cleaning medium used efficiently and reliably to surfaces and objects. By fulfilling complex, application-specific tasks in industrial cleaning processes, EDUR has been a valued partner in development and implementation for years.

              The different pumping media and cleaning processes used require a careful selection of all pump components in the design. The compatibility of the pumped medium with the pump materials and the realization of the fluidic tasks are of particular importance. The different requirements in wet chemical cleaning with high component throughput or cleaning with solvents containing hydrocarbons or chlorinated hydrocarbons in batch or individual component cleaning are the focus of the pump selection. Typical, albeit adverse, pumping conditions such as dry running, vacuum operation, gap-type particles in the flow or snore operation are taken into account and taken into account, for example, by special sealing systems and specially adapted impellers. Depending on the cleaning system and process conditions, block pumps, inline pumps or even free-flow pumps from EDUR are used. EDUR multiphase pumps are used for the downstream recovery of used materials and treatment of the waste water.

            • WATER AND WASTE WATER TECHNOLOGY

            • Worldwide, water has always been of enormous importance as a particularly valuable commodity and, due to its intensive use, requires permanent optimization with the help of applied water and wastewater technologies. The claim not to consume water, but to return it to natural water resources in purified quality after use, holds enormous innovation potential for relieving the environment.

              Application of EDUR centrifugal pumps in water and wastewater technology

              EDUR centrifugal pumps are used in many different areas within the water and sewage technology. The advantages of the EDUR centrifugal pumps include the robustness and durability of the pumps as well as the special ability of our multiphase pumps to pump liquid-gas mixtures. EDUR offers a wide range of free-flow pumps for pumping polluted water, for example with large particles.

              Typical applications range from water supply to treatment and sterilisation, including process water for industrial processes. Due to special properties of the gas entrainment capability and the self-priming behaviour, the pumps are also used in critical areas, for example in the food industry or pharmaceutical industry.

              Efficient wastewater treatment also includes the recovery and reuse of nutrients and valuable substances. This is usually done in various purification stages, for example by mechanical, biological and physical-chemical processes. In wastewater technology, flotation as a physical-chemical process has proven itself over decades as an efficient process worldwide.

              Our multiphase pumps are used in flotation plants worldwide. In dissolved air flotation, a reflux flow of the clear water is saturated with air under pressure and then expanded to atmospheric pressure. The micro-bubbles released during the pressure release process attach themselves to the suspended solids and float them to the surface, from where they are skimmed off or skimmed off. Typical fields of application are the treatment of liquids with suspended solids such as oil-water emulsions, grease separations, phosphate and heavy metal precipitation, secondary clarification in biological sewage treatment plants and much more. Multi-stage flotation plants are also known for the treatment of hazardous waste. The pump hydraulics of the EDUR multiphase pumps, specially developed for this process, allows the operation throttled at the suction side without additionally required compressed air to suck in gas from the environment. These special pumps guarantee a reliable delivery of liquids with gas contents of up to 30% at a pressure of usually 4 to 7 bar. When using the EDUR multiphase pump in a flotation plant according to VDMA Standard Sheet 24430, the gas is added directly into the suction line, thus allowing a reduction of the plant components compared to systems of conventional design. Compressor, pressure vessel, complex control system and various valves are not required.

              Self-priming centrifugal pumps are often used for water supply. Before the first start-up, the pump itself must be filled with the operating medium, which in any case remains in the pump through the upwardly directed nozzles and cannot be levered out. With the water in the pump body, the pump generates a negative pressure on the suction side with which it draws the air column out of the suction pipe and up the water column. As soon as the pumping medium is present, the pump starts pumping normally. The sucked-off air must be discharged on the discharge side, e.g. via a ventilator. The self-priming EDUR pumps are of the design of classical centrifugal pumps and therefore have a better efficiency than e.g. side channel pumps. The advantage of self-priming pumps is that a foot valve at the end of the suction line is not absolutely necessary. This is because foot valves are often a weak point in water-supplying systems, as they can tend to clog, calcify or wear out with sedimentary loads and fail unnoticed as a result. In these cases, "pouring on" is no longer possible, as the water escapes again through the defective foot valve. This can lead to damage and malfunctions in pumps which, due to their mode of operation, are dependent on a permanently present liquid column.

              With capacities of up to 300 m³/h and delivery heads of up to 16 bar, the self-priming EDUR pumps can be used very well, for example, for charging elevated tanks.