Suction blowers
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ower ATB suction blowers represent a specially designed system for wood and pellet fuelled boilers, consist of a motor including heat conduction, impeller, housing (not with ready to install modules) and controls. In order to achieve high overall unit efficiency levels, modern boilers require very low waste gas temperatures, generally below 200°C, and therefore, the flue draught is reduced accor-dingly. Defined underpressure in the boiler is essential to guarantee optimum combustion. Therefore, the pressure increase and the flow volume of the blower vary on cold and war-mer days. We have adopted maximum energy efficiency and sustainable energy use as our guiding principles and assist as a partner in the com-plex matter of system selection and the corͭrect control of the blower under all conditions. Even faults, which can nonetheless frequent-ly occur, e.g with waste gas media temperatures of up to 500°C, are not a lasting problem for the system. This guarantees the highest levels of overall unit availability. Our systems offer very low throughflow resisͭtance in a stationary mode and can therefore be simply switched off when there is sufficient flue draught. Switching off and higher levels of operational efficiency mean sizeable an-nual energy savings. The use of performance adjustment involving voltage regulation, motor pole switching or frequency inverter ensures maximum efficiency and low noise emissions even during partial load running. We also occasionally use the system for in exhaust gas extractor units, for smoke cham-ber extraction and bakery ovens, etc. One of our strength is the ability to provide custo-mised items for SMEs, even if batch sizes are relatively small. The impeller is calculated and designed by ATB. The prototypes and pilot batch compo-nents are subjected to intensive checks on our air flow test stand, which conforms with DIN 24163 (ventilator chamber test stand). These tests are aimed at determining the characteristics of the system with regard to pressure increase, flow volume, efficiency and long-term behaviour, etc. On the one hand, the intention is to verify the theoretical calculations and on the other, to be able to carry out the improvements needed to meet customer specifications. In the case of impellers of up to 0 170 mm, stainless steel 1.4301 is used as a standard material. For impellers larger than 0170 mm, St360C structural steel is employed, or if requested, austenitic 1.4301/1.4571. The housing can be supplied with different diameters of suction and pressure connecͭtions, is standardly made out of St360 St coated with heat-resistant paint, or available on request in stainless steel. Above that we offer some ready to install units without housing. The experience gathered as an established motor manufacturer of long-standing, parti-cularly with regard to drives subject to high temperatures, makes us an ideal partner. Standard features include ball bearings with deep groove C3 and hot grease lubrication, a stainless steel shaft and all fastenings in stainless steel. If necessary, we use additio-nal aluminium heat deflectors (12 Watt heat conduction at 300°C media temperature). The systems are generally available with drive voltages of 1~ 230 V or 3 ~ 400 V. As we produͭce the motors ourselves, we can provide an extremely flexible response to special custo-mer requests concerning the drives (e.g. special windings). For controls we offer different possibilities: - Economy transformer 1~ for 2-pole motors, 5-level (230/200/170/140V/110V) with 120VA or 600VA, at 110V approx. 1000min-1 Advantages: large control range, extremely favourably priced, high efficiency level. - Changeable pole motor 2/4-pole ; 4/8-pole; 4/6-pole ; 2/6-pole. - Frequency inverter for 2- and 4-pole motors cover the entire ventilator performance range. Source voltage: 1~ 230V, Output voltage 3~ 230V, Power 0.4/1.5 and 2.2 kW Our frequency inverters are equipped with RS485 interfaces, 0-10V and 4-20mA control connections, rated value potentio-meters and integrated PID governors. Supply as a complete system and perfectly matched to the blower and the motor. Further data and type information is available on request. Type 150 complͨte suction unit Type 150 ready to install module Type 230 ready to install module Ara Technik in/Bewegung ATB ANTRIEBSTECHNIK AG SilcherstraBe 74 D-73642 Welzheim Telefon +49 (71 82) 14-1 Telefax +49 (71 82) 28 87 http://www.atb.de E-mail: info@atb.de ATB AUSTRIA ANTRIEBSTECHNIK AG G.-Bauknecht-StraBe 1 A-8724 Spielberg Telefon +43 (35 77) 7 57-0 Telefax +43 (35 77) 7 57-1 82 http://www.atb.co.at E-mail: gL@atb.co.at