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Explosion protection for dust collectors

Valves and flaps help to raise the safety level
Explosion protection for dust collectors

TRM Filter based in Ljubljana, Slovenia, is specialised in services concerning air filtration technology. Its dust collectors and systems are used in the pharmaceutical, chemical and food processing industries. Ventex explosion isolation valves and Redex Flap passive explosion isolation flap valves raise the safety level of dust collection systems in potentially hazardous areas.

Dust collectors are essential for most operations in the processing industries where air filtration is required. The concentration of air impurities is usually very high and clogging may be frequent as a result of the extreme loads to which the filtering elements are subjected. TRM Filter offers dust collectors that fulfil the highest requirements with regard to containment as well as explosion protection. They are used to extract dusty air from different production processes such as weighing, granulation, tablet compression, packaging and so on. Dust laden air is sucked from these processes into the dust collector, where dusty substances – some extremely toxic – are effectively removed to safeguard the atmosphere and the working environment. These dust collectors are distinguished by a compact design and equipped with a state-of-the-art smart filter cleaning technology called Rotatronic. This system is designed to enable fully automated operation. Filter cleaning is initiated whenever clogging creates excessive pressure differences at the filter. Rotatronic consists of special rotational nozzles with valves at the outlet filter openings, various sensors and a PLC control unit with an advanced user interface. With its self-learning algorithm it provides maximum process stability and operational performance. The easy maintenance and energy efficiency are other benefits of TRM Filter dust collectors.

Peter Tomsic, CEO of TRM Filter d.o.o., points out: “Explosion protection is a very important factor, since most applications we deal with handle potentially explosive atmospheres of dust or in some cases hybrid mixtures containing organic solvents. As one of the leading companies in the field of explosion isolation, Rico convinced us with their advanced, high-quality systems complete with all the required Atex certifications.”
Explosion isolation provides protection
The reliable, high-end explosion protection which was needed here led the way to the Swiss company – and finally to Rico Ventex isolation valves. The functionality of these valves is based on the pressure wave causing them to be sealed in case of an explosion. The wave pushes the closing device inside the valve against seal and thus prevents propagation. The valve consists of a special sealing profile with an integrated cavity. If it has to be replaced, therefore, it is not necessary to grind in the valve and the gap dimension can be adjusted without difficulty. If explosion isolation is triggered, an unlocking device ensures a quick restart, as very little effort is required to open the valve.
Another valve used to protect dust collectors against explosion in applications involving organic dust is the Redex Flap, a passive explosion isolation flap valve which provides optimal protection due to a mechanical locking device. This flap valve is single-acting and prevents explosions from propagating counter to the flow direction. More benefits result from the low pressure loss, easy maintenance and fast restart – so that process interruptions are reduced to a minimum in the event of an explosion.
TRM Filter found a competent application partner for new product developments in Rico. Tomsic: “The ability to consult proven experts unbureaucratically when questions arise has always been a great advantage. The efficient support and reliable service convinced us to continue this collaboration in the future.” As CEO of TRM Filter, he is also highly satisfied with the operation of the explosion isolation systems and adds that he is looking forward to further deepening the successful partnership.
www.cpp-net.com search: cpp0117rico

Aleksandar Agatonovic
Deputy CEO, Head of Sales, Marketing, PM, R&D and Aftersales, Rico
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