Product Manual
WWW.MARCOUSA.COM
3
6.0 CUBIC FOOT C-SERIES BLAST POT
Failure to comply with ANY WARNING listed below could result in death or serious injury.
Never attempt to move a blast pot containing media. Never attempt to manually move blast pots greater than 6.0 cubic foot capacity.
Always use at least two capable people to manually move a blast pot on flat, smooth surfaces. A mechanical lifting device must be
used if a blast pot is moved in any other manner.
Use of Marco remote control switches with other manufacturer’s remote control systems could cause unintended activation of remote
control systems resulting in the release of high speed media and compressed air. Only Marco remote control switches should be used
with Marco remote control systems.
Always be certain to have secure footing when blasting. There is a recoil hazard when blasting starts that may cause user to fall and
misdirect the media stream at operator or bystander.
Never use a blast pot or attachments as a climbing device. The person could slip and fall. The blast pot could become unstable and tip
over.
The use of this product for any purpose other than originally intended or altered from its original design is prohibited.
For equipment manufactured by entities other than Marco, you must consult the Original Equipment Manufacturer operator’s manuals,
information, training, instructions and warnings, for the proper and intended use of all equipment.
Failure to comply with ANY CAUTION listed below may result in minor or moderate injury.
Static electricity can be generated by media moving through the blast hose causing a shock hazard. Prior to use, ground the blast
pot and blast nozzle to dissipate static electricity.
High decibel noise levels are generated during the blasting process which may cause loss of hearing. Ensure appropriate Personal
Protective Equipment and hearing protection is in use.
Failure to comply with ANY WARNING listed below could pose a hazard to personnel or property.
Always use media that is dry and properly screened. This will reduce the potential for obstructions to enter the remote control system,
metering valve and blast nozzle.
Moisture build-up occurs when air is compressed. Any moisture within the blast system will cause medias to clump, clogging metering
valves, hoses and nozzles. Install an appropriately sized moisture separator at the inlet of the blast pot. Leave the moisture separator
petcock slightly open to allow for constant release of water. If insufficient volume of air exists and petcock is unable to be left open (at
all times) petcock should be opened frequently to release water.
To reduce media intrusion in the air supply hose, depressurize the Blast pot before shutting off air supply from compressor.
Inspect nozzle before placing in service. Damage to nozzle liner or jacket may occur during shipping. If you receive a damaged nozzle,
contact your distributor immediately for replacement. Nozzles placed into service may not be returned. Nozzle liners are made of
fragile materials and can be damaged by rough handling and striking against hard surfaces. Never use a damaged blast nozzle.
Blasting at optimal pressure for the media used is critical to productivity. Example: For a media with an optimal blasting pressure of 100
psi at the nozzle, one pound per square inch of pressure loss will reduce blast efficiency by 1.5%. A 10 psi reduction in air pressure
will cause a 15% loss of efficiency. Use a Needle Pressure Gauge to identify pressure drops in your system. Consult with your media
supplier for the requirements of your media.
Replace Blast Nozzle if liner or jacket is cracked or damaged. Replace nozzle if original orifice size has worn 1/16" or more. Determine
nozzle wear by inserting a drill bit 1/16" larger than original size of nozzle orifice. If drill bit passes through nozzle, replacement is
needed.
When it comes to media & air mixtures, more is not necessarily better. Optimum blasting efficiency takes place when a lean media & air
mixture is used. To correctly set the metering valve, begin with the valve fully closed and slowly increase the amount of media entering
the airstream. As you increase the media flow, watch for a "blue flame" (Figure 1) at the exit of the nozzle. Faster cutting, reduced
media consumption and lower clean-up costs, are benefits of the "blue flame".
See Media Consumption Chart for consumption rates and required air flow (cubic feet per minute). The system must meet these
minimum requirements to ensure proper function and performance.