LEL control systems | automatic recirculation systems
DEC.LEL™

LEL (Lower Explosive Limit) monitoring and automatic recirculation systems play a critical role in ensuring safety and optimizing operational efficiency. Furthermore these systems are a crucial element to be evaluated when you are planning to install a VOC emission control system (e.g. a solvent recovery unit, or a thermal oxidizer).

Increasing energy costs are requesting our customers (flexible packaging and converting industries, using rotogravures, flexo and lamination machines) to explore and evaluate energy saving technologies, in order to increase their competitiveness in the global market.

LEL monitoring, automatic recirculation, drying hoods, safety, gas detection, hazardous environments, flammable gases, industrial drying, ventilation systems, operational excellence, workplace safety, air quality, explosion prevention, gas sensors, risk mitigation, occupational health, engineering controls, process safety, gas monitoring systems, drying process optimization, combustible vapors, ventilation design, SIL, hazardous area classification, gas detection technology, industrial hygiene, combustible gas detection, drying hood maintenance, DEC, Dynamic Environmental Corporation, DEC IMPIANTI, DEC HOLDING, DEC SERVICE, DEC ENGINEERING, DEC AUTOMATION, DEC LAB, DEC ANALYTICS

DEC.LEL™ • benefits

Thanks to DEC.LEL™ recirculation system, we can reach:

  • increased safety, due to LEL monitoring;
  • reduction of the exhausted air flow (SLA), thanks to the increase of solvent concentration (g/m3);
  • electrical energy saving;
  • thermal energy saving (up to ~40÷50%, depending on ambient temperature);
  • reduction of the investment for the activated carbon solvent recovery or the thermal oxidizer system;
  • reduction of the operating costs (i.e. specific consumptions, recovery cost).
  • LEL monitoring, automatic recirculation, drying hoods, safety, gas detection, hazardous environments, flammable gases, industrial drying, ventilation systems, operational excellence, workplace safety, air quality, explosion prevention, gas sensors, risk mitigation, occupational health, engineering controls, process safety, gas monitoring systems, drying process optimization, combustible vapors, ventilation design, SIL, hazardous area classification, gas detection technology, industrial hygiene, combustible gas detection, drying hood maintenance, DEC, Dynamic Environmental Corporation, DEC IMPIANTI, DEC HOLDING, DEC SERVICE, DEC ENGINEERING, DEC AUTOMATION, DEC LAB, DEC ANALYTICS

    DEC.LEL™ • LEL control configuration

    The DEC.LEL™ system's response to a Lower Explosive Limit (LEL) exceeding the set threshold (H/HH) depends on the chosen configuration. Here's a breakdown of the three available options:

  • DEC.LEL_B™ (basic): H (high): triggers a visual alarm for operator awareness. HH (high-high): initiates an emergency line shutdown for critical safety situations.
  • DEC.LEL_A™ (active): H (high): automatically slows down the production line, potentially by reducing the rate of solvent evaporated. HH (high-high): initiates an emergency line shutdown for critical safety situations.
  • DEC.LEL_D™ (dynamic): continuously adjusts the recirculation system (adjusting the fresh air intake vs. the recirculation ratio) aiming to maintain the LEL value at the desired optimal set point. H (high): automatically slows down the production line, potentially by reducing the rate of solvent evaporated. HH (high-high): initiates an emergency line shutdown for critical safety situations.
  • DEC.LEL™ • LEL control systems

    LEL monitoring, automatic recirculation, drying hoods, safety, gas detection, hazardous environments, flammable gases, industrial drying, ventilation systems, operational excellence, workplace safety, air quality, explosion prevention, gas sensors, risk mitigation, occupational health, engineering controls, process safety, gas monitoring systems, drying process optimization, combustible vapors, ventilation design, SIL, hazardous area classification, gas detection technology, industrial hygiene, combustible gas detection, drying hood maintenance, DEC, Dynamic Environmental Corporation, DEC IMPIANTI, DEC HOLDING, DEC SERVICE, DEC ENGINEERING, DEC AUTOMATION, DEC LAB, DEC ANALYTICS

    Three different LEL control and recirculation processes are available:

  • DEC.SDR™: single dryer recirculation;
  • DEC.SLR™: single line recirculation (multiple dryers);
  • DEC.MLR™: multi lines recirculation.
  • LEL Monitoring Technologies

    The following LEL monitoring technologies are part of our portfolio:

  • CAT: catalytic sensor;
  • IR: infra-red sensor;
  • FID: flame ionization detector;
  • FTA: flame temperature analyzer.
  • get a free consultation

    LEL monitoring and automatic recirculation systems are not just safety measures, but also energy-saving solutions that can significantly benefit businesses in the flexible packaging and converting industries. They ensure regulatory compliance, enhance safety, and contribute to cost reduction through improved operational efficiency.

    Contact DEC for a free consultation: we can help you assess your needs and recommend the best Advanced Flow Optimization technology for your operation.

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