Catalogue Axial fans, the basic series
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Axial fans The basic series

Type code and symbols Type code for axial fans 6. 0 Nominal impeller diameter DN [mm] 5. Product specific code 0 = Without guide vanes = Toromax byPo""chDLK N = Outlet guide vanes = ToromaxPro byp°""KhDLK G = Car park = ToromaxPro duplex byp°""chDLK R = Reversible = Drymax byPo""chDLK Type code of all product segments H_Centrifugal fan (heavy-duty) A_Axial 0_Without guide vanes M_Motor (direct) C_Centrifugal fan (compact) R_Centrifugal N_Outlet guide vanes K_Coupling A_Axial fan V__Inlet guide vanes R_Belt drive S_Smoke extraction fan E_Single inlet Z_Double inlet G_Car park DN Nominal...

PRODUCTS PLUS FULL-SERVICE five u The Trademark Pollrich DLK Fan Factories® The common trademark “Pollrich DLK Fan Factories” pools more than 140 years of production knowhow of industrial fans by the manufacturers Pollrich Ventilatoren GmbH and DLK Ventilatoren GmbH. A workforce of more than 220 employees at the two production sites Mönchengladbach and SchöntalBerlichingen manufacture axial and centrifugal fans for nearly any industrial requirement. As the only manufacturer in the world offering all five product segments of industrial fans, we propose an unmatched range of products for the...

Our R&D department combines expertise within all sectors of fan technology with highly efficient simulation tools such as CFD (Computational Fluid Dynamics) for flow visualisation and FEM (Finite-Element-Method) to calculate the structure-mechanical characteristics, as well as test ducts and -chambers according to international standard ISO 5801, equipped with the latest measuring technology in order to determine the aerodynamic and aeroacoustic characteristics. We take care of you, wherever you are in the world, with our comprehensive power service package beginning at the moment of...

Project planning advice Theoretical principles Sound pressure Sound pressure waves are small pressure fluctuations that are masked by the ambient pressure. Due to the fact that the sound pressure in the normal pressure unit Pa exceeds several powers of 10, it is usually stated as the sound pressure level in a logarithmic form in the unit decibel [dB]: (1) p2 Lp = 10 ⋅ lg eff p2 o A sound pressure level of e.g. 8 dB therefore corresponds to 108/10 times the lower hearing threshold. This correlation is shown by the examples in Table 1 Table 1: Correlation between the sound pressure and sound...

Project planning advice The enveloping surface unit is determined in (6) as follows: (6) A LS = 10 ⋅ lg mit A0 = 1m 2 A0 The k octave bands can be summarised to a total sound power level LW, tot by means of logarithmic addition for all mean frequencies: (7) LW ,i k LW,ges = 10 ⋅ lg ∑ 10 10 i =1 A-weighting The A-weighting is a relativisation that takes into account the characteristics of the human ear (unit dB(A)). To determine an A-weighted octave spectrum, the level corrections shown in Table 2 are added to the non-weighted spectrum: (8) Comments To calculate the sum of several sound...

Project planning advice Explosion protection Types of protection The type of protection shows the technical action taken to ensure the machine cannot act as an ignition source. Table 5 shows what action can be taken so that nonelectrical components can be used in explosion-protection areas acc. to EN 13463-1 ff (non-electric). Fans may only be used in areas in which there may be explosive media if they have been manufactured in compliance with the Directive 94/9/EC. The principles of this Directive are shown below. Theoretical principles Apart from the CE ( ) and the so-called ATEX symbol (...

Project planning advice The temperature classes are selected like the classification of the explosion protection types depending on the material used and are also stated in the Directive 94/9/ EC or corresponding tables. Identification in dusty atmosphere When fans are used in a dusty atmosphere the identification has to be changed. The explosion protection group is not used anymore. The temperature class is replaced by the maximum surface temperature. Similarity laws This section looks at the similarity laws that serve the conversion of the measuring data for changed operating conditions....

Project planning advice Systemcharacteristic Performance curve Operating point Radian Angles can either be stated in radians (angle in relation to p ) or in degrees.180° degree correspond to a radian of p . Important radians are shown inTable 9. Table 9: Conversion radian and degrees qv [m3/h] Figure 7: Operating point as the intersection of the system and performance curves Ignored or inadequately considered influences that change the system pressure loss and therefore change the flow behaviour lead to a change in the system characteristic and therefore also shift the operating point....

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Comparison of the axial fans Product line AAOM pf, max DN/Poles [Pa] 250/2 185 2000 1800 Total pressure increase pf [Pa] Product line AANM 2600 2400 Total pressure increase pf [Pa] Product line AAGM 4500 Total pressure increase pf [Pa]

Ø 450 mm, Low pressure axial fan, AAOM Comparison of the axial fans Product line AARM Blade angle pf, max 88 DN/Poles [Pa] Performance curve representation:V [m3/h]According to ISO 5801, the corresponds to the effective pressure of q qV [m3/h] total pressure increase of the the fan. fan with pressure side duct The effective pressure is the pressure, connection extension (Z11) is required DN fan)accessories Z07, Z20, Z95. (L,min ≥ 2,5 x to assemble which is available to overcome the 378 X *If motor excess length is > 0, a duct pressure loss of the system. Example: Requested operating point...

LOW PRESSURE AXIAL FAN AAOM - Diameter range DN 250 – DN 1600 - Optimal efficiency - Highly corrosion-resistant impeller (saltwater-proof) - Blades adjustable at standstill - Best price - As standard with IE2 motors ** - CFD-optimised * - Wide range of accessories for universal use * CFD (Computational Fluid Dynamics): development tool for numerical simulation – here, for optimisation of flow characteristics and efficiencies of fans. The new series combines best price with optimum efficiencies.