Product Manual

Page 4 of 12 PX05X-XXX-XXX-BXXX (en)
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Hytrel®, Viton® are registered trademarks of the DuPont Company
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Kynar® is a registered trademark of Arkema Inc.
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ARO® is a registered trademark of Ingersoll-Rand Company
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Santoprene® is a registered trademark of Monsanto Company, licensed to Advanced Elastomer Systems, L.P.
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Loctite® and 242® are registered trademarks of Henkel Loctite Corporation
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572™ is a trademark of Henkel Loctite Corporation
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Lubriplate® is a registered trademark of Lubriplate Division (Fiske Brothers Rening Company)
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WARNING
= Hazards or unsafe practices which could
result in severe personal injury, death or
substantial property damage.
CAUTION
= Hazards or unsafe practices which could
result in minor personal injury, product
or property damage.
NOTICE
= Important installation, operation or
maintenance information.
GENERAL DESCRIPTION
The ARO diaphragm pump oers high volume delivery even
at low air pressure and a broad range of material compatibil-
ity options are available. Refer to the model and option chart.
ARO pumps feature stall resistant design, modular air motor /
uid sections.
Air operated double diaphragm pumps utilize a pressure dif-
ferential in the air chambers to alternately create suction and
a positive fluid pressure in the fluid chambers, ball checks
insure a positive ow of uid.
Pump cycling will begin as air pressure is applied and will
continue to pump and keep up with the demand. It will build
and maintain line pressure and will stop cycling once maxi-
mum line pressure is reached (dispensing device closed) and
will resume pumping as needed.
AIR AND LUBE REQUIREMENTS
WARNING
EXCESSIVE AIR PRESSURE. Can cause pump
damage, personal injury or property damage.
A filter capable of filtering out particles larger than 50
microns should be used on the air supply. There is no lu-
brication required other than the “O” ring lubricant which
is applied during assembly or repair.
If lubricated air is present, make sure that it is compatible
with the “O” rings and seals in the air motor section of the
pump.
OPERATING INSTRUCTIONS
Always flush the pump with a solvent compatible with
the material being pumped if the material being pumped
is subject to “setting up” when not in use for a period of
time.
Disconnect the air supply from the pump if it is to be inac-
tive for a few hours.
The outlet material volume is governed not only by the
air supply, but also by the material supply available at the
inlet. The material supply tubing should not be too small
or restrictive. Be sure not to use hose which might col-
lapse.
When the diaphragm pump is used in a forced-feed
(ooded inlet) situation, it is recommended that a “check
valve” be installed at the air inlet.
Secure the diaphragm pump legs to a suitable surface to
insure against damage by vibration.
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MAINTENANCE
Certain ARO “Smart Parts” are indicated which should be
available for fast repair and reduction of down time.
Provide a clean work surface to protect sensitive internal
moving parts from contamination from dirt and foreign
matter during service disassembly and reassembly.
Keep good records of service activity and include the
pump in preventive maintenance program.
Service kits are available to service two separate dia-
phragm pump functions: 1. AIR SECTION, 2. FLUID SEC-
TION. The Fluid Section is divided further to match typical
part Material Options.
Before disassembling, emptycaptured material in the out-
let manifold by turning the pump upside down to drain
material from the pump.
DIAPHRAGM PUMP SERVICE
GENERAL SERVICE NOTES:
Inspect and replace old parts with new parts as necessary.
Look for deep scratches on metallic surfaces, and nicks or
cuts in “O” rings.
Tools needed to complete disassembly and repair:
7/8” wrench, 1/2” socket or wrench, 3/8” socket or
wrench, 3/8” Allen wrench, 10 mm Allen wrench, T-10
Torx screwdriver, torque wrench (measuring inch
pounds), “O” ring pick.
FLUID SECTION DISASSEMBLY
Remove (61) top manifold.
Remove (19) “O” rings, (21) seats, (12) washers (where ap-
plicable) and (22) balls.
Remove (60) bottom manifold.
Remove (19) “O” rings, (21) seats, (12) washers (where ap-
plicable) and (22) balls.
Remove (15) uid caps.
Remove (14) bolt, (6) diaphragm washer, (7) or (7 / 8) dia-
phragms and (5) washer.
Remove (1) connecting rod from air motor.
Carefully remove remaining (14) bolt, (6) diaphragm
washer, (7) or (7 / 8) diaphragms and (5) washer from (1)
connecting rod. Do not mar surface of connecting rod.
FLUID SECTION REASSEMBLY
Reassemble in reverse order.
Lubricate (1) connecting rod with Lubriplate® or equiva-
lent “O” ring lubricant.
Connecting rod (1) should be installed using 96571 bullet,
included in service kit.
Install (5) washers with i.d. chamfer toward diaphragm.
When replacing PTFE diaphragms, install the 93465 San-
toprene diaphragm behind the PTFE diaphragm.
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