The development of this new generation of dust collectors from NESTRO® Lufttechnik in Germany sets a new standard for the industry: it is the first series of dust collectors equipped with IE5 reluctance motors and frequency converters. Users can save up to 22% on energy costs compared to those using IE3 motors. In this way, the Thuringian company contributes significantly to climate protection while saving the user money.
The development of the NESTRO® type NE J mobile dust collectors in the well-established performance classes 200, 250, 300 and 350 for indoor installation is based on the company’s decades of experience in woodworking, in appliance technology and in high efficiency fan technology. Using our clean air dust collectors for the extraction of various materials is cost effective for small and medium sized businesses in many industries. The NE J verifiably saves on capital costs, operating costs, heating costs, maintenance costs and installation and base costs.
The construction guarantees optimum extraction thanks to the integrated and proven clean gas technology, featuring 100% dust tightness and constant target / actual comparison of the negative pressure required by the processing machines. The fan is mounted after the filter unit. The clean gas blower does not carry any material. The new design offers the user four different disposal options using four alternative substructures, which can also be converted at any time: for dust bin (s), for presses NBP briquettes, for NZRS separator locks or for the standard 800l container common in Switzerland. All mobile bins as well as the feed hoppers for the other three options are fitted with a construction glass.
Working closely with one of the leading German suppliers of so-called high-efficiency reluctance motors, NESTRO® Lufttechnik GmbH is the first manufacturer in the world to offer dust collectors equipped with continuously frequency-controlled and quieter IE5 motors as standard. The frequency converter ensures that the motor is always running at the optimum operating point. At the same time, we have optimized the entire fan geometry over several development stages for precisely this type of motor. The new NE J achieves the lowest energy consumption per unit of power, improves reliability and service life and significantly reduces noise emissions. The sound insulation of the exhaust air by means of silencers is integrated in the clean gas zone. This makes the NE J one of the quietest devices on the market. As an option, the entire fan room can be additionally soundproofed.
Thanks to a new modular design, the plug-and-play devices are more compact and more flexible to use than the previous version and unbeatable in terms of price / performance ratio. The dust collectors can for example be delivered in segmented pieces for narrow passages to be assembled directly on site. They are now also suitable for shipping in standard sea containers. The performance classes NE J 200 to 350 with an operating volume flow rate of up to 9500 m³ / h have proven their worth and perfectly cover the range of applications with more than one machining machine.
The new generation NE J has an automatic fire extinguishing system from performance class 250 certified by the independent fire safety competence center MPA, Dresden, using a hermetic oxygen seal (shutter of fire protection). In this way, a fire that arises due to, for example, an ignition source entry is immediately suppressed. The blow-off box as an expansion space with a non-return valve provides additional operational safety. In the event of heat dissipation, the fire damper is pneumatically closed and the fan is switched off. Due to the absence of negative pressure, the check valve also closes, the oxygen tight seal is established. This function is also maintained in a state of zero potential. It is not necessary to use water or dry chemicals to extinguish the fire – it will destroy the entire appliance. This also saves the user the need to periodically replace a powder extinguisher. The need for spark detection and extinguishing is also omitted with all of our standard designs due to the low volume of raw gas.
Like their previous models, NE J dust collectors have a pre-separation of material. This means that dust and sawdust do not directly reach the filter bags. The construction design creates a cross flow under the filter bags, which prevents dust and sawdust from escaping from the bins or hopper. Cleaning always takes place after the end of operation by means of compressed air pulses, in the so-called JET process. It is known to be fast, thorough and gentle and leads to a longer life of the filter material. NESTRO® has also included an efficient and high quality air compressor especially for this application in its product line – users can get it all from one source.
All dust collectors are approved for indoor installation. At the Research Association for Applied Systems Safety and Occupational Medicine (Forschungsgesellschaft für angewandte Systemsicherheit und Arbeitsmedizin, abbreviated FSA), Mannheim, the new series has also passed the mandatory explosion pressure test and is certified accordingly . Thanks to FSA-certified antistatic filter bags made of needle-punched polyester felt, a residual dust content of less than 0.1 mg / m³ is guaranteed. If there is no space inside, the compact device can also be installed outside, for example with a return air duct to the inside. Here, NESTRO® offers a summer / winter switch for the supply of regulated fresh air for more comfort. The construction corresponds to the European standard DIN EN 16770 for dust and sawdust up to dust explosion class St1.
With the NESTRO®-LOGIC control in 32 languages for automatic fan start at machine start up, up to 8 machining machines can be recognized and the associated valves can be controlled as standard via potential-free contacts or drawers . NESTRO® therefore has a response to the current trend towards more machines managed by the same set of operators. The main control of the NBP briquetting press or of the NZRS separation lock is integrated with the corresponding disposal option in the control cabinet of the dust collector – there is only one control unit for two machines. An industry-unique wired touchscreen terminal with integrated emergency stop provides the user with optimal freedom of movement around the collector in terms of operation and data analysis. The dust collector can be parameterized and controlled via the 7 “color touchscreen (switches and indicator lights are no longer required). Energy data can be analyzed and commissioning can also take place directly on the treatment machines using the WLAN A frequency converter is fitted as standard and guarantees high energy efficiency at every load level.
The first dust collectors of the innovative NE J series are expected to be delivered to customers in the fourth quarter of 2021.
Source and photo: Nestro
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