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Use only genuine ARO replacement parts to assure com-
patible pressure rating and performance.
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Read carefully all warnings and safety precautions and
heed the following before operating, to avoid personal in-
jury and / or property damage.
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Be certain anyone operating this equipment has been
trained to use it safely.
WARNING
COMPONENT RUPTURE. DO NOT EXCEED
MAXIMUM RATED OPERATING PRESSURE OF: Polycar-
bonate Bowl - 200 p.s.i. (13.8 bar), Glass filled Nylon Bowl -
150 p.s.i. (10.3 bar). To avoid possible damage or personal in-
jury, DO NOT expose the unit to excessive pressure beyond
the intended working range.
WARNING
TEMPERATURE LIMITS. DO NOT EXCEED
MAXIMUM TEMPERATURE LIMITS OF 125_ F (52_ C). Ex-
cessive temperature can affect non-metallic parts which may
weaken them and cause failure.
WARNING
USE WITH INDUSTRIAL COMPRESSED AIR
SYSTEMS ONLY. DO NOT USE WITH BOTTLED GAS
PRODUCTS OR FLUIDS. MISAPPLICATIONS CAN RE-
SULT IN COMPONENT FAILURE.
WARNING
DISASSEMBLY HAZARD. DO NOT DISAS-
SEMBLE THIS UNIT WHEN IT IS UNDER PRESSURE.
SHUT OFF AND RELIEVE AIR SUPPLY BEFORE AT-
TEMPTING SERVICE OR DISASSEMBLY PROCEDURES.
Isolate the unit by closing the line valve or disconnect the sup-
ply line or hose.
WARNING
BOWL REMOVAL HAZARD. THE BOWL
MUST BE SECURELY LOCKED INTO POSITION BEFORE
EXPOSING THE UNIT TO LINE PRESSURE. The bowls are
INSTALLATION
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Install filter / regulator with the air flow as indicated by the ar-
row.
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Install filter / regulator as close as possible to the air operated
equipment for best performance.
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Filter / regulator must be installed with the bowl downward for
proper operation.
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Locate the filter / regulator upstream from the lubricator.
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Mount with the knob up.
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See gauge port "CAUTION".
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A tamper resistant feature is available to lock in specific air re-
quirements.
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After a filter / regulator has been installed in the air line, the ad-
justment knob should be turned counterclockwise until com-
pression is released from the pressure control spring. This
prevents over pressurizing the air operated equipment when
the air supply is turned on.
OPERATION
FILTER
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Monitor the sediment accumulation.
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If the pressure drop across the filter becomes excessive, empty
the filter bowl, clean or replace the filter element to assure good
performance.
PAGE 2 OF 4
OPERATING AND SAFETY PRECAUTIONS
designed with a feature which inhibits removal while under
pressure. When reinstalling, push the bowl up into the body
and rotate to the right 1/8 turn. Failure to lock the bowl could
cause it to blow off, which could result in personal injury or
property damage.
WARNING
DO NOT USE DEGREASERS OR SOLVENTS
TO CLEAN POLYCARBONATE BOWLS. Exposure internal-
ly or externally to incompatible chemicals or their vapors or
fumes could attack and weaken polycarbonate material,
causing failure.
DO NOT EXPOSE to acetone, trichloroethane, gasolene, al-
cohols, keytones, esters, chlorinated hydrocarbons, toluene,
etc.
Clean polycarbonate bowls with soap and water or kerosene
only. USE COMPATIBLE LUBRICATING OILS ONLY. Lubri-
cating oils used in plastic bowls must be compatible with poly-
carbonate plastic (some "fire resistant" oil additives are not
compatible). Fumes of these substances in contact with poly-
carbonate bowls internally or externally can also damage the
bowl. Consult the chemical / oil manufacturer for compatibility
and temperature limits. Refer to ''Technical Specifications" on
page 1 of this manual.
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CAUTION: THE REGULATOR GAUGE PORT SHOULD
NOT BE USED AS AN AUXILIARY PRESSURE OUTLET
PORT. The gauge port is intended to be used only for pressure
monitoring, sensing or remote pilot. The feedback may affect
the set pressure.
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NOTE: Secondary pressure adjustment ranges are not mini-
mum or maximum secondary pressure limits. Regulators can
be adjusted to zero p.s.i.g. secondary pressure and, general-
ly, to pressures in excess of those specified. The use of these
regulators to control pressure outside of the specified range is
not recommended.
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Clean the filter element periodically. Soak the filter bowl and
clean with soap and water. Refer to warnings concerning poly-
carbonate bowls.
REGULATOR
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Pull knob to adjust air pressure.
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Turn clockwise to increase pressure.
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Turn counterclockwise to decrease pressure.
NOTE: On non-relieving models only, reduce pressure to lower
than estimated final operating pressure, purge air (open or actu-
ate air operated equipment to relieve pressure) , adjust pressure
upward as needed.
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Push to lock.
MAINTENANCE
FILTER
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Filters with manual drain must be drained as frequently as
necessary to keep the liquid level below the baffle, which
could cause liquid to be carried downstream.
REGULATOR
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Once the system has been depressurized, the regulator valve
and diaphragm can be replaced without removing the unit
from the line.
P291XX XXX
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