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AxiTop Diffuser For Axial Fans


Greater efficiency, less noise, reduced exit losses.

In refrigeration and cooling installations, any residual heat created must be expelled to the surrounding air through heat exchangers. Fans therefore pump cold air through the heat exchanger to improve the heat dissipation. There is a whole range of options for designing and configuring especially efficient, quiet and durable fans. A new, passive component, the so-called diffuser, provides for a substantial improvement in efficiency and noise. Its pressure-boosting effect minimises exit losses and makes it easier to adapt the fan to commercially available heat exchangers.


Every medium is only able to absorb a certain amount of heat energy for each degree Kelvin. The possible temperature difference and the amount of heat to be expelled define the cooling air flow required. This air volume has to be delivered by a fan through the heat exchanger under consideration. Because refrigeration technology appliances are usually operated with high operating factors, an economical use of the drive energy input is important, for every additional watt costs money. A suitably configured fan impeller is used to generate a volume flow of air. Here it is important to avoid stripping and back-flows as these create energy losses and unwanted noise. This procedure is state of the art which all manufacturers now more or less command.
ebm-papst is going one step further. AxiTop - the diffuser for axial fans - substantially reduces losses downstream of the impeller outlet.





Knowing how - the airflow through the AxiTop diffuser

To deliver an airflow through a heat exchanger, a sufficient pressure differential is needed to overcome the flow resistance of the exchanger. Normally, the delivered air flows at high speed from the exit side of the fan and is dissipated into the environment. Dissipation means that the kinetic energy of the flow is converted into heat that is no longer technically utilised. The AxiTop diffuser is designed to decelerate the flow, allowing a large proportion of the dynamic kinetic energy to be converted into static pressure. This reverse-conversion boosts the pressure increase of the impeller. If all components are aerodynamically optimised, this allows efficiency to be significantly enhanced, making it possible to reduce the fan speed and thus noise emissions.



In practice, the use of the AxiTop diffuser does not just mean lower energy consumption; it also means greater variance for the user and for the development engineer. The AxiTop diffuser configuration can be optimised for different characteristics, depending on the application concerned. Either a greater air performance is possible with unchanged energy input, or unchanged air performance with lower energy consumption. The AxiTop diffuser can also greatly improve acoustic characteristics. This is especially important in noise-sensitive applications (e.g. in cooling or air conditioning units operating at night).


The scale of possible energy savings - or efficiency enhancement and noise reduction - that can be achieved by fitting an optimal diffuser such as the AxiTop on a conventional heat exchanger is substantial. For example, exchanging a standard guard grille fan for an axial fan with support grille, guard grille and AxiTop diffuser makes savings of up to 27% possible in energy consumption and at the same time up to 7.2 dB(A) less acoustic capacity.
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Tangential Fans

Stove jacket cooling, thermal storage heaters, wood-burning stoves, overhead projectors, tanning beds, climate control systems and heating units: All these applications share the need for ventilation with a low overall height and high air flow at low flow rates. The ideal solution: Tangential fans made by ebm-papst.


The small ratio of the impeller diameter (30 to 65 mm) to the impeller length in most cases allow a flat and stretched design. The large cross section on the suction and pressure side makes for high air delivery at low flow rates. The air being thrown a long distance and low noise level are additional features of tangential blowers.




Stable output for every need
Depending on the specific application, tangential fans are available with asymmetrical shaded-pole motor, capacitor motor or GreenTech EC motor with integrated commutation electronics (including tach output and PWM or analogue output). For the GreenTech EC motors, a higher speed can be selected than for shaded-pole and capacitor motors, for example to overcome higher counterpressure. Using corresponding sensor technology, the tangential fan with GreenTech EC technology configures the necessary operating points automatically and provides the exact air volume needed.





The facts about ebm-papst tangential fans at a glance

  • Low noise at high air flow and low back pressure

  • High air flow at low flow rates

  • Good contact of cooled ducts and surfaces with cold air due to the expanded width of the exhaust surface

  • Very flat design

  • Moisture-protected versions, for example for refrigeration technology

  • GreenTech EC motors mean higher speeds than AC motors

  • Performance adaptation via PWM signal or 010 V analogue voltage


In large tangential fans such as those used for underfloor convection heating or air curtains our newly developed size 43 motor with groundbreaking GreenTech EC technology is used.
The motor features outstandingly high efficiency and virtually silent operation. In addition, operating electronics that are tuned exactly to the motor offer individual and precision control options.

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Energy-saving Fans And Energy-saving Motors

Energy-saving fans: High efficieny and multifarious functionality

Energy-saving fans based on the energy-saving motor (ESM) are in demand for many applications today. This especially applies to devices with a high duty cycle, such as air-conditioning and refrigeration systems. Expertise is needed to lower energy consumption considerably, both for the aerodynamic design of the rotor, blade and housing as well as for the development of energy-saving motors that work very efficiently.


Energy-saving fans and energy-saving motors were developed for use in refrigerated and freezer cases. Depending on the fan design (axial, centrifugal, diagonal), these fans are available in various sizes with diameters from 130 to 300 mm.




The energy-saving motor represents environmentally friendly efficiency
Energy-saving fan with aerodynamically optimised plastic rotor.

Due to the aerodynamically optimised plastic rotor, energy-saving motors (ESM) run more quietly and also make do without any environmentally damaging varnish. Energy-saving motors (ESM) achieve a motor efficiency of more than 65 %, a figure more than three times higher than conventional shaded-pole motors. The input power was often able to be reduced to less than a fifth of previous values in real-world applications, since shaded-pole motors usually are not operated at their maximum efficiency. This is how this investment pays for itself within a very short period. High efficiency also results due to lower intrinsic heating during operation, which dissipates less heat into the environment. Energy-saving motors (ESM) offer outputs between 5 and 35 W, operate with 230 V or 115 V supply voltage and provide additional options such as an automatic decrease to a second working speed at night.





Energy-saving iQ motor for 1:1 replacement.

The energy-saving iQ motors from ebm-papst are compatible with existing shaded-pole motors, are highly efficient up to 65% and as a result of having the same installation dimensions, they accommodate simple 1:1 mechanical replacement. The latest model the NiQ is even more economical than its predecessors.


Axial fan impellers with diameters of 154-254 mm can be installed on the iQ motors in the same way, which also yields an energy-saving solution. The intelligent electronics control voltage fluctuations so the speed remains constant. Several renowned supermarket chains are already taking advantage of this ecological and economically useful 1:1 replacement option.



With an attachable interface module (ESM+), the energy-saving motor can quickly be expanded by adding a 0-10 VDC control input and a +10 V voltage output (10 V, max. 1.1 mA). Thus the energy-saving motor provides a direct power supply for an external pressure or temperature sensor, for example. An additional, external power supply is not necessary. In addition, the ESM+ interface module offers a speed signal for speed monitoring.




Energy-saving fan for low voltage 24 VDC

For refrigerated cases with low voltage LED lighting system, energy-saving fans suitable for 24 VDC low voltage are available. This version of the ESM offers an integrated 0-10 VDC control input for a linear closed-loop speed control and a speed signal for speed monitoring. No interface module is needed for this.


With this programming unit, which was specially designed for use in manufacturing and field service, the two default speed steps for the energy-saving fans can easily be reprogrammed with the help of a user-friendly navigation menu. An automatic shutoff function provides longer battery life. Software updates can be downloaded easily using a mini-USB plug. Batteries, programming cables and operating instructions are included in the standard scope of delivery.


These extensions and functions of the existing energy-saving motor series allow demand-oriented control of the complete installation, which increases the installation's overall efficiency even more. The energy-saving fans are designed for long, maintenance-free operation. Depending on environmental conditions, the service life usually exceeds 60, 000 hours. Due to great energy savings, installation in new devices and retrofitting pay off in a very short period.




Energy-saving fans made of "epylen" wood/plastic composite material



To attain additional energy savings during production, for the first time, energy-saving fans made of "epylen", a wood/plastic composite material have been developed, an absolute innovation in the fan area. In doing so, cautious use has been made of the available resources, i.e. ever smaller amounts of non-renewable resources are used and from these, high-quality and durable products are produced. A wide variety of requirements exist for the raw materials themselves. They are to be not only renewable, but also produced in an environmentally responsible manner, thus without using fertilisers or pesticides, and wherever possible in mixed crops and small production units. Learn more about "epylen", the wood/plastic composite material.




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Gas Valves

  • Permitted gas families II + III (according to EN 437)
  • Maximum inlet pressure 65 mbar (CE), 0.5 psi (CSA)
  • Permitted ambient temperature 0 °C to 60 °C (-15 °C to 70 °C on request)
  • Permitted storage temperature -25 °C to 70 °C
  • Degree of protection IP40 in combination with a suitable plug
  • Offset correction ±20 Pa
  • Minimum signal pressure -30 Pa
  • Permitted orientation when installed Coil orientation between standing upright and lying horizontally

The main use for our zero-pressure gas valves is in condensing boiler applications for domestic heating systems in the low to medium output range. Our portfolio includes both pneumatically and electronically controlled gas valves for premixing and atmospheric gas burners.




The main use for our zero-pressure gas valves is in condensing boiler applications for domestic heating systems in the low to medium output range. Regardless of the suction pressure generated by the premixing blower, these gas valves always keep the offset pressure at zero and also compensate for pressure variations that arise in the supply network. The offset (shift in zero point) can be adjusted on the servo controller. At the same time, the desired gas quantity is adjusted using an integrated flow control element. Together these operations ensure precise adjustment of the air-gas ratio. Depending on the design, reference pressure can be connected to the servo controller if required.




D01 gas valve





Housing material: Aluminum

Electrical hookup: Connector housing with 5.08 mm contact spacing
Inlet (gas connection): 4x M5 mounting holes (hole spacing 36 mm)
Outlet: 4x M5 mounting holes (hole spacing 36 mm)
Safety valves: Valve class B/B as per EN161



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Energy Saving IQ Motor

Today, saving energy is more important than ever. Doing so with fans is particularly effective as they are often operated almost constantly, for example in refrigerated cases, bottle coolers and floor convectors. As a result, high motor efficiency makes a pronounced difference - not only in terms of reducing environmental impact, but also keeping money in the end user's wallet. Higher efficiency also means that less waste heat is given off into the surroundings, resulting in further energy savings.


For this case, ebm-papst offers the energy-saving iQ motor, which has a high efficiency of up to 65%, is compatible with existing shaded-pole motors and requires the same space for installation, allowing simple and direct mechanical replacement. Axial impellers with diameters from 154 to 254 mm can be fitted to the iQ motor the same way for an energy-saving solution. Their smart electronics regulate voltage fluctuations so that the speed remains constant. Many well-known supermarket chains are already making use of this environmentally and economically beneficial option for direct replacement.




The advantages at a glance:



  • 70% energy savings with GreenTech EC technology

  • Improved efficiency of up to 65%

  • More economical and significant environmental benefits

  • Easy 1:1 replacement with existing shaded-pole motors thanks to identical installation dimensions






Intelligence to the second power: iQ motors


The new iQ motors can do everything the normal iQ motors can do and more. This makes their application in refrigeration technology even more efficient, for example. The iQ is also available as a plastic version with protection class II. Extra functions even enable different operating modes that are individually adjustable.



iQ reverse on start.
The iQ reverse on start runs backwards automatically for a pre-programmed time at each start-up. This is an important function for cooling units, as it allows accumulated dust to be blown from the heat exchanger of the condenser for long-lasting high cooling capacity.






iQ reverse on demand.


With the iQ reverse on demand, the time and duration reverse operation can be determined. For example, the defrost cycle of the evaporator to eliminate dust from the heat exchanger of the condenser can be used.








iQ two speeds.The special performance feature of the iQ two speeds is its two factoryprogrammed speed steps. For example, the application can be run in different daytime and nighttime modes to save additional energy.



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IQ Motors


Our latest generation of energy-saving motors.

The proven iQ motor series compact motors for driving axial fans for cool air distribution in evaporators and cooling in condensers has been available for a long time. The NiQ combines the well-known properties of the iQ and iQ motor series with a new design inside and out. This is how the development team was able to make the "next generation iQ" even more efficient and above all, more economical. With the plastic used, the motor qualifies for approval in applications involving indirect contact with foodstuffs (for example in open vegetable display cases).




The advantages at a glance:



  • 70% energy savings with GreenTech EC technology

  • Improved efficiency even makes NiQ motors more economical than iQ and iQ motors in some areas

  • Long service life and smooth operation

  • Easy 1:1 replacement thanks to identical installation dimensions

  • Expanded applications



It's all a matter of TechNiQ

The NiQ is a completely new motor platform that currently provides three sizes with different levels of power. The modified design and intelligent material selection were not the only factors contributing to the NiQ's increased economic efficiency; pioneering production changes also played a role.


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Submersible Circulation Pumps

Submersible circulation pumps offer the highest performance and reliability for pumping low-viscosity media such as water, condensate or soap and water mixtures, or for circulating coolants in beverage tapping units.

Type  UN  f  AC/DC  qV
  in V in Hz   in m³/h
P2E070-AA26-01 230 50 AC 0.71
  230 60 AC 0.74
P30-4330 230 50 AC  
P5-3020 230 50 AC  
P7-2524 230 50 AC  
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Dosing Pumps

Dosing pumps are the specialists for precision dispensing of high-viscosity media such as liquid detergent, fabric softener, oils, paints and lacquers, chemicals and so on.


Legend

UN = Nominal voltage
f = Frequency
AC/DC = Type of voltage

qV = Flow rate (H = 100 cm)


ype  UN  f  AC/DC  qV
  in V in Hz   in m³/h
P51-2518/Gtp22        
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VD ROTOR MOTORS

Electronically commutated external rotor motors of the VARIODRIVE series for the power range from 3 to 100 watts. With a long service life and excellent control characteristics for operation on external electronics.

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  • Ebm-papst Middle East FZE (ebm-papst Middle East FZE)
  • PO Box 17755 Jebel Ali South Free Zone AP05 UAE-Dubai
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