A C1D1 Extraction Lab with a Separate Non-Classified Work Area
C1D1 EXTRACTION LAB WITH NON-CLASSIFIED AREA
EVERYTHING YOU NEED IN ONE UNIT
EXLab Duo Features
- The spark-proof exhaust fans, in conjunction with the temperature controlled makeup air unit, use 100% outside fresh air to provide the required air flow rate over your equipment.
- The EXLab Duo is equipped with a gas detection alarm system that will initiate when hazardous gas is detected. If the levels continue to rise, the system will activate an audible alarm signaling occupants to exit the module long before dangerous levels are reached.
- The weatherproof main electrical panel is located on the exterior of the unit, outside of the hazardous area and out of the way.
- The entry door is of steel construction and equipped with an automatic closer, a panic exit device, and weather seals.
- The module can be mounted directly on a shop floor or foundation, on piers, blocks, outdoors, indoors, or be made mobile.
The EXLab Duo Design Concept
The ventilation system has been designed to create a linear flow of air through the room to quickly evacuate any flammable gasses that might accidentally be released in the room. Code requires the gas concentration remain below 25% of the LEL (Lower Explosive Limit). The LEL is the minimum gas concentration to allow conflagration, so 25% is only 1/4 of what is required for ignition. We’ve held ourselves to a higher standard and have our LEL set point at 10% for ventilation.
There are two stages to our ventilation system: primary and secondary. The primary system includes the HVAC unit and a primary fan. It will remain on any time the lights are turned on, as required to maintain the temperature setting on the thermostat, and when signaled by the gas detector. The secondary system includes a motorized damper and a secondary fan that will engage starting at 10% LEL. It’s designed to quickly evacuate and replace the air to ensure the gas levels remain below the code required amounts. All exhaust air evacuates directly outdoors and all intake air comes from an outdoor location.
A gas detector has been installed that will control the ventilation and notify occupants of the room in the event of a gas release inside the room. Once gas levels reach 10% LEL the secondary ventilation system will engage and a visual indicator on the gas detector will be illuminated, so action can be taken to remedy the situation. If the gas levels continue to rise to 20% LEL an alarm will sound and the receptacles powering the extraction equipment will be powered down.
Once the gas has been cleared the alarms will cease and the secondary ventilation will power down. If, for some reason, the gas detector stops functioning the receptacles and lights will be powered down and emergency lighting will engage to facilitate egress from the module, but ventilation will continue uninterrupted. After a fault condition the breaker controlling the receptacles must be manually flipped to restore power.
All of the electrical equipment installed inside the C1D1 area will be rated for C1D1 use and UL listed; including, but not limited to: the lights, receptacles, switches, and gas detector. This means that they are sealed and/or intrinsically safe. Even in the event that the room atmosphere reaches 100% LEL or above, there is no chance of an ignition from the electrical components.
There is a single enclosure with a disconnect switch on the exterior of the module where the main power is connected, this is the main “kill switch”. All wiring inside the module will be completed up to this enclosure, but any remotely located devices will need to be wired separately.
814 SW Evangeline Trwy, Suite 118
Lafayette, LA 70501