4.17 c hecklIst
Check the following items prior to start up:
1. Motors wired for proper voltage. 2. All fans and motors turn freely. 3. Lubricate all bearings. 4. Check installation of exhaust fan for proper airflow direction. Generally, airflow is out of booth. 5. Listen for excessive or unusual noise when booth is operating. 6. With booth operating, open any door (optional) for 30 seconds and see if powder application gun will shut down. This will verify proper safety operation of the booth. 4.18 o ptIMIzIng c ollector p erForMance
Outlined below are some basic collector operating parameters for pulse jet collectors using elements with Non Woven Spun Bond (all finishes) or Conventional Felted Media:
Pressure 50 PSI - 80 PSI Frequency (off time) 20 seconds*
• •
• Duration (on time) Maximum 200 milliseconds Reservoir: Requires an unrestricted air supply at least the diameter of blowpipes and needs to be big enough for valve’s demand. Ideal conditions will leave reservoir at 85% of the operating PSI after firing. Cleaning air: Needs to be clean and dry, which could be accomplished with an air dryer. In-line traps/separators can catch a lot of problems in air supply prior to getting to the collector. *Pulse frequency: Frequency should be adjusted to balance the collector’s delta P and should be monitored frequently during first seven days after start up. Pulsing frequency can never be any faster than reservoir recovery to operating PSI. Pulse Sequence: Needs to be staggered to maximize distance between newly cleaned row and next row to be pulsed. Hopper: Should not be used for storage. Evacuation equipment (rotary valves, screw conveyors, etc.) should be sized to unload hopper before accumulation occurs. Units with slide gates should be left open and equipped with drum adapters. Changing filters: To change filters, push red handle and filter will drop about an inch. Install new filter, then pull red handle and filter will lift up into position. Be careful not to crush new filter by putting too much tension on clamp. If new filter doesn’t seem to fit, you can adjust metal plate filter sits on by loosening nuts on all-thread and then moving plate up or down
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