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Section 5  Operation
"BLACK LIGHT TEST" - LEAK DETECTION

TM-5-3895-374-24-2 M081 Asphalt Mixing Plant Manual
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TM 5-3895-374-24-2 FEBRUARY 1993 BAGHOUSE: PRE-START UP BAGHOUSE All joints and connections to the baghouse should be made air tight.  Visual checks should be made on welds, flanged connections and gaskets for any damage that could have occurred in transit, unloading, or erection.  All hatches, access doors, and clean outs should be bolted tight, and checked to insure a positive seal. BAGS Bags should be checked to be sure that all are in place, and are sealed against tubesheet. SCREW CONVEYORS/AIRLOCK Reference Wm.  Meyer manual and drawing. Inspect  bearings  and  gear  reducers  for  proper  lubrication.    Check  the  rotor  for  clockwise  rotation  (facing  belt/chain guard) Make certain that no foreign objects, such as tools, have fallen into the conveyors or airlock during installation. JET PULSE The  pressure  gauge  on  the  header  pipe  should  read  between  80  and  95  PSIG.    Initiate  the  pulse  cycle.    One diaphragm valve will open at a time to pulse one row of bags.  The pressure in the header pipe must build back up too 80- 95  PSIG  before  the  next  pulse.    If  the  pressure  is  too  low  between  pulses,  adjust  the  timer  so  that  there  is  more  time between pulses. Check that each diaphragm valve closes after every pulse and be sure there are no leaks in any of the piping. AIR COMPRESSOR Reference Ingersall-Rand manual and drawing. Check crankcase  oil level,  compressor rotation,  and prime  condensate trap.  Test pressure regulator and oil level switch. page 3 - 690







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