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PULSAR

III-P/III-PE and VI-P/VI-PE PRESSURE CABINETS

Page 16

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Manual No. 21527, Rev. I, 02/19

the doors to flex inward. Tests should be performed with
the  exhauster  running.  Point  the  nozzle  away  from  the
door during the tests and open the door only enough to
disengage  the  interlock  switch.  The  interlocks  should
stop  the  blasting  when  either  door  is  open  and  permit
blasting when the doors are closed.

5.5

Pulse Pressure – Figure 19

NOTICE

Do not pulse new dust collectors or
replacement cartridges until the cartridge is
properly seasoned. Refer to Section 7.9.
Pulsing unseasoned cartridges can cause
premature cartridge failure or decrease the
efficiency of dust collector.

5.5.1

Adjust pulse pressure using the regulator

mounted  on  the  blast  machine  piping,  as  shown  in
Figure 19. Begin pulse at 60 psi. To adjust pressure, pull
the  knob  to  unlock  it,  as  shown  in  Figure  19,  and  then
turn clockwise to increase pressure or counterclockwise
to  decrease  pressure.  Once  operating  pressure  is  set,
push the knob to lock it and maintain the setting.

Figure 19

5.5.2

As the filter cartridge cakes with dust, it may be

necessary to pulse between blasting, per Section 6.2.6.

5.5.3

When pulsing alone does not adequately clean

the cartridge, increase pulse pressure in 5-psi increments
until the maximum of 90 psi is reached. As dust cakes on
the cartridge, the differential pressure increases. Using a
gauge to measure the differential pressure is a good
way to tell if the cartridge is heavily caked.

5.5.4

When the maximum pulse pressure of 90 psi is

attained, and additional pulsing as described in Section
6.2.6 does not increase visibility or decrease differential
pressure, replace the cartridge, per Section 7.8.

5.6

Cabinet Air-Inlet Damper

5.6.1

Once the damper is initially set, per Section 2.5,

it  seldom  requires  readjustment.  The  initial  setting
produces  approximately  1/2"  to  3/4"  of  static  pressure
within  the  cabinet.

Do not confuse cabinet static

pressure with reclaimer static pressure, which is
controlled by the outlet damper, as noted in Section
5.3. Reclaimer pressure must be set before cabinet
pressure.

5.6.2

Using a manometer (as noted in Section 5.7 and

listed  in  Section  9.1)  is  the  most  accurate  method  of
monitoring and adjusting cabinet pressure. Following the
instructions  packed  with  the  manometer,  start  the
exhauster and insert the needle into a glove, and adjust
pressure  using  the  inlet  damper.  Open  the  damper
farther  to  decrease  static  pressure  or  close  it  farther  to
increase pressure.

5.6.3

If a manometer is not available, use the gloves

as an indicator. With the exhauster ON, the gloves
should be inflated, but not elevated off the grate.

5.7

Optional Manometer

NOTE: These instructions show several methods of taking
static-pressure  readings  (negative  pressure)  on  Pulsar
reclaimers  by  using  a  flexible-tube  manometer.  Use  the
method  best  suited  for  the  application.  The  instructions
explain  the  processes  for  taking  periodic  readings  and
show how to permanently install the manometer for taking
frequent  readings.  Permanent  fittings  should  be  installed
when  the  manometer  installation  is  permanent.  Use
silicone sealer or other sealant to seal around the fitting to
prevent  leaks.  The  fitting  should  be  capable  of  being
capped  when  the  manometer  tube  is  removed.  This  will
prevent  leaks  that  alter  the  reclaimer’s  separation
efficiency.  Taking  readings  at  different  locations  could
produce different readings. Static-pressure readings at the
door are generally 0.5" to 1" lower than those taken above
the  reclaimer.  The  readings  are  reference  points,  so
readings  should  be  taken  using  the  same  method  each
time a reading is taken.