8
3D SYSTEMS, INC
.
5
ATMOSPHERE REQUIREMENTS
ROOM VENTILATION
The DMP process takes place in an inert atmosphere inside the process chamber (Nitrogen or Argon, depending on material
used). During the preparation and building process, the gas is released into the work place. Therefore, in small rooms, a
minimum ventilation is required.
During loading and unloading the machine, powder particles will become airborne. The presence of metal powder in the work
environment is unsafe and must be avoided as much as possible. Therefore adequate room ventilation (50 cubic meters/hour)
is recommended and it is strongly advised to wear PPE (Personal Protective Equipment).
Room Air Source
The facility HVAC system provides
source air only
. Air that is introduced into the room is not allowed to recirculate back into
the facility HVAC system.
The atmosphere in the ProX
®
DMP100 installation room must meet the following specifications:
ATMOSPHERIC VARIABLES
REQUIREMENTS
Room temperature
Heating and air conditioning installed
A/C not blowing directly onto the main cabinet
Temperature
Operating range: (15 to 30) °C; (59 to 86) °F
Storage range: (5 to 50) °C; (41 to 122) °F
Non-condensing relative humidity
No higher than 70%
Room air changes
4 per hour minimum
Heat dissipation
Maximum: 1 kW ( 3 412 BTU/hr)
Average: 0.75 kW ( 2 559 BTU/hr)
Atmospheric corrosives
None; Clean Dry Air (CDA) is required
Room Air Exhaust
The facility must have a separate system for removing the air from the room. The system must remove the room air directly
to the outside. For the exhaust system, 3D Systems recommends the use of TEFC (Totally Enclosed Fan-Cooled) motors for this
application.
WARNING: FAILURE TO EXHAUST THE ROOM AIR DIRECTLY TO THE OUTSIDE WILL PUT PERSONNEL AT RISK
FOR BREATHING AIR CONTAMINATED WITH METAL PARTICLES AND WILL PUT THE FACILITY AT RISK FOR AUTO-
IGNITING FIRES .
WARNING: IF YOU ARE USING REACTIVE METALS, (TITANIUM OR ALUMINUM) AIR EXTRACTION EQUIPMENT
SHOULD NOT CONTAIN FILTERS . FINE METAL PARTICLES WILL BE COLLECTED BY THE FILTER AND WILL BE A
SOURCE OF AUTO-IGNITING FIRES .