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Instructions,
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INSTRUCTIONS
INSTRUCTIONS FOR THE BIOAEROSOL NEBULIZING GENERATOR (BANG)
INTRODUCTION - 1 The BANG or BioAerosol Nebulizing Generator is a unique nebulizer for the generation of aqueous aerosols at a low air flow rate. The design of the BANG minimizes foaming of protein solutions while maximizing aerosol output. A fluid metering pump or a flow restrictor may also be used to regulate the liquid flow rate. Different orifices can be ordered resulting in a choice of aerosol production rates. The standard model operates between 2 to 16 liters per minute depending upon the input air pressure. It may be connected to an optional cyclone to assure that the aerosol produced consists of particles in a specified size range. Direct addition of dilution air is possible as well. Aerosol is produced when incoming air that may be self aspirated or pumped is forced through a small orifice and meets a flow of incoming solution. As a result, the solution is broken into small droplets. Large droplets fall back into the fluid reservoir for reuse. The smaller droplets are released from the outlet and directed into the desired unit such as the CH Technologies nose-only exposure unit. The baffle or the curved outlet tube regulates the size of the nebulized droplets. The baffle is the outlet tube itself in the BANG model with a curved outlet (FIGURE 5).
When you receive your BANG, you should unpack it carefully and check to make certain that the following parts are all present in undamaged condition: 1 -The BANG itself as seen in Figure 1 Your BANG may vary slightly in appearance depending upon the specific fittings you requested and whether or not you have a standard tubular or a vertical discharge BANG. Figure 1 is a photograph of a vertical discharge BANG. 2 - A package of
accessories containing: The accessories package may vary depending upon what you ordered (Figure 4). Any changes from the standard pieces listed above will be noted on your shipping memo. PLEASE KEEP YOUR SHIPPING MEMO FOR FUTURE REFERENCE. If you find that anything has been damaged in transit, contact the carrier of the shipment immediately in addition to CH Technolgies. INITIAL OPERATION Your BANG will arrive almost entirely assembled. The glass jar will be packed separately and must be screwed into the bottom of the BANG unit. The ground glass top of the jar and threads have been wrapped with Teflon tape to act as a seal when the jar is screwed into the main portion of the BANG. Do not screw the jar in too tightly or it will damage the O-ring on the inside of the BANG (see Figures 2 & 3) resulting in a loss of the seal. In addition you may want to insert a piece of tubing into the liquid return opening inside the base of the BANG (see Figure 2, #5). Both Figures 1 and 2 show where fittings must be connected to air and fluid. The fittings used depend upon what you have requested. The air inlet is shown in Figures 1 and 2 (#1). The fluid inlet is shown in Figures 1 and 2 (#4). The connection for fluid aspiration is also shown in Figures 1 and 2 (#3). You should immediately check the operation of the BANG. Connect it to a pressurized air source and fill the glass jar with about 10cc of distilled water. Connect fittings 3 and 4 in Figure 2 together with a short piece of tubing unless you are using a fluid metering pump or refill system. This connection ensures that the system is closed and recirculates the liquid. When the air source is turned on, a mist should appear at the aerosol outlet as shown in Figures 1 and 2 (#2). If a mist does not appear, recheck all your fittings. The operation of the BANG depends upon it being a completely sealed unit. MECHANISM OF OPERATION Knowledge of the mechanism of aerosol formation by the BANG will help you in determining the aerosol charac |
CH Technologies, Inc. (USA)