Heavy duty industrial centrifugal fans
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Our “Heavy Duty Industrial Centrifugal Fans” are designed by using a modular configuration system enabling us to provide precise individual configurations matching any required field of application or condition. On the one hand, this design method ensures the required high level of quality for each product – according to the effective ISO standards. On the other hand, this enables us to produce “custom-made” individual solutions with short lead times and with firm, consistent performance data for any range of pressure and performance. Optimal and cost efficient solutions for the requested...

Inlet-types Single inlet Double inlet Ø d 1 Inner diameter Ø d 2 Outer diameter Ø d 1 Ø d 2 x 100 80 75 71 67 63 56 53 45 40 35 31 28 25 20 Nominal impeller diameter = impeller diameter d 2 in mm Application field for every blade profile (to the right) considering the nature of the conveying medium. 1) Straight radial blades 2) Backward inclined curved blades 3) Backward inclined straight blades 4) Backward inclined aerofoil blades, very high efficiency 5) Forward curved blades with radial tip angle 6) Backward inclined, logarithmically curved blades with very high efficiency 7) Conveying...

Installation options Drives - Bearing single sided - Bearing single sided on the common frame Impeller between the bearings, bearings on both sides of the casing - Single inlet, one bearing at intake side, one bearing at drive side without additional support on frame - Single inlet, one bearing at intake side, one bearing at drive side mounted on the common frame - Double inlet, both bearings at the intake openings without additional support on frame - Double inlet, both bearings at the intake openings, one bearing mounted on the common frame Impeller between the bearings, bearings on both...

Rotation direction counter clockwise or clockwise 0° 360° 90° 270° 180°Null-Richtung Null-Richtung 180° 270° 90° 0° 360° 90~ 90~ Casing position possible for any angle Energy saving with control devices 1.2 1.0 0.8 0.6 0.4 0.2 0 0 0.2 0.4 0.6 0.8 1.0 1.2 Flow rate V . / V . opt Electrical power comsumption Pel / Pel opt 1) a b cd e 1) Reference Refers to the required power input for a coupling driven three- phase asynchronous motor at constant speed. Inlet and discharge connection options Energy saving by power control a) Control by throttling damper: Simple method but energy consuming. b)...

Stress Fluid patterns analysis by FEM Comparison of different frequency spectra 500 1,000 1,500 2,000 20 30 40 50 60 70 Vergleich verschiedener Frequenzspektren f[1/s] dB with different nominal rpm. The intermediate flow rate values are adjusted by adjustable inlet vane control. This method is very advantageous especially for fans often operating at part load ranges below 75%. e) Continuously variable speed control by AC motors, frequency converters or DC motors. According to the operation conditions, we provide individual solutions for acoustic and thermal insulation, high temperature...

Metallurgical plant Dillingen/Saar - Blast furnace - Sintering plant - Exhaust gas treatment 3 shift operation, year round 8,400 operating hours/year Capacity 3.1 Mio t/year 2 Induced draught fans VR 75 P10 CO UK 2240 Impeller Ø 2.3 m Controlled by frequency converter Flow rate 550,000 m³/h Total pressure 50 mbar Flue gas temperature 150°C Fan speed 1,200 rpm Motor rating 1,350 kW – 690 V References in the most diverse industries

industries Aluminium plant Ikot Abasi, Nigeria - Main exhaust gas fan of electric furnace Capacity 197,000 t/year 4 Flue gas fans Type VR 63 S10 CO RK 2500 Impeller - Ø 2.5m Controlled by inlet vane control powered by electrical actuators Flow rate 515,000 m³/h Total pressure 4,500 Pa Gas temperature 180°C Fan speed 1,000 rpm Motor rating 680 kW – 11 kV

Cement production plant Province of Yozgat, Turkey Annual production 2.5 Mio t of cement 1.2 Mio t of concrete 2.4 Mio t conglomerates Process fan VR 53 P23 EO SK 3150 Impeller - Ø 2.5m Controlled by frequency converter Flow rate 460,000 m³/h Total pressure 67 mbar Flue gas temperature 400°C Fan speed 1,000 rpm Motor rating 1,200 kW – 690 V

24h SERVICE for fan units – worldwide. Service-hotline: fon +49(0)2161- 968 184 fax +49(0)2161- 968 307 service@pollrich.com Our service-team is available for you around-the-clock - Technical advice - Assembly - Commissioning - Performance tests - Noise and vibration measurements - Inspection - Preventative maintenance - Maintenance and repair - Electronic balancing - System optimisation [DE] DLK Ventilatoren GmbH Ziegeleistraße 18 D-74214 Schöntal-Berlichingen fon +49(0) 7943 - 9102 - 0 fax +49(0) 7943 - 9102 - 10 info@dlk.com [CN] Nantong Dart-pollrich fan CO.,Ltd 88 Tongsheng Road,...