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PENBERTHY MODEL GSA ANOLODER FOR AN-FO (AMMONIUM NITRATE - FUEL OIL) BLASTING
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
4 INSPECTION
Safety instructions
On receipt of a Penberthy Model GSA anoloder,
check all components carefully for damage
incurred in shipping. If damage is evident or
suspected, do not attempt installation. Notify
the carrier immediately and request a damage
inspection.
Penberthy Model GSA anoloder comprises
(1) canister with attached carrying strap and
ejector, (1) remote control valve/hose assembly,
(1) loading hose, (1) clamp, (1) grounding
bolt and (1) grounding nut. Confirm that the
delivered Model GSA anoloder: 1) matches the
appropriate size and model on the purchase
order and 2) accommodates the actual
operating conditions at the installation site.
5 OPERATION
Only qualified, experienced personnel who are
familiar with AN-FO blasting equipment and
thoroughly understand the implications of the
tables and all of the instructions should operate
the anoloder. The anoloder is operated with
30 to 110 psig (210 to 760 kPaG) compressed
air. For maximum performance keep pressure
losses between air main and unit to a
minimum. Dirt, mud and other foreign matter
must be kept out of the air supply line.
5.1 Testing
Safety glasses, gloves and protective clothing
should be worn when testing the Model GSA
anoloder. Connect the air hose to the anoloder
and squeeze the hand control valve two or three
times to test valve operation. The unit can be
expected to load properly if air blows freely out
loading hose.
5.2 Filling and operating
Pour the AN-FO into the canister to within a
few inches of the top (approximately 25 lbs),
or up-end the entire bag and leave it in the
container. Insert loading hose into drill hole
to predetermine the length of hose needed to
reach the bottom of the hole. Back the hose out
of the hole one to four feet from the bottom.
Safety instructions
Improper technique could result in a sudden
blow-back of AN-FO from the drilled hole
during loading. The operator should stand
to one side of the drilled hole, never directly
in front. Failure to avoid hole openings could
result in irritating and potentially harmful
AN-FO material covering the operator.
The operator should stand one to four feet from
the drill hole when grasping the loading hose.
Increasing this stand-off distance beyond six
feet will decrease the loading density, while
decreasing this distance to one foot may cause
some of the AN-FO particles to be blown out of
drill hole.
6 MAINTENANCE
Use only qualified, experienced personnel who
are familiar with this type of equipment and
thoroughly understand all the instructions in
this manual. Ammonium nitrate is a corrosive
and hygroscopic compound which can
clog pneumatic loading equipment quickly.
Maintenance is an important factor in ensuring
safe anoloder operation.
6.1 Cleaning
Empty any AN-FO left in the anoloder canister.
Wash down the anoloder and other exposed
equipment with water. Pour water into the
canister and use the control valve to blow air
through the ejector until all water has been
removed. A screen is provided in the air inlet
of the ejector to prevent foreign matter from
entering the ejector. The air strainer should be
removed and cleaned regularly.
In some cases it will be advisable to clean
the ejector body and parts with naphtha
(petroleum spirits) at regular intervals to
minimize corrosion. The ejector should only
be dismantled in a proper maintenance area,
using the following procedure:
• unscrew ejector bonnet nut
• remove spring, piston and piston O-ring
• remove air strainer retainer ring and air
strainer screen
• snap off diffuser shroud and unscrew ejector
diffuser one-half turn
• clean body and parts with naphtha (petroleum
spirits)
• dry parts with a clean cloth and blow out body
with compressed air
•
tighten diffuser, reassemble and test operation
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