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Page 3 of 12PE03P-X-X-A0S (en)
GENERAL DESCRIPTION
The ARO diaphragm pump offers high volume delivery even at low air
pressure and a broad range of material compatibility options available.
Refer to the model and option chart. ARO pumps feature stall resistant
design, modular air motor / fluid sections.
Air operated double diaphragm pumps utilize a pressure differential in
the air chambersto alternately createsuction and positive fluidpressure
in the fluid chambers, ball checks insure a positive flow of fluid.
Pump cycling will begin as air pressure is applied and it will continue to
pump and keep up with the demand. It will build and maintain line pres-
sure and will stop cycling once maximum line pressure is reached (dis-
pensing 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.
S A filter capableoffiltering outparticles largerthan 50 micronsshould
be used ontheair supply. There isno lubrication required otherthan
the “O” ring lubricant which is applied during assembly or repair.
S If lubricatedairispresent,make surethat itis compatiblewith the“O”
rings and seals in the air motor section of the pump.
OPERATING INSTRUCTIONS
S Always flush the pump with a solvent compatible with the material
being pumped if the materialbeing pumped is subject to “settingup”
when not in use for a period of time.
S Disconnect theair supply fromthe pump ifit istobe inactivefora few
hours.
S The outlet materialvolumeis governed not onlybythe air supplybut
also bythematerial supply availableat the inlet.The material supply
tubing should not be too small or restrictive. Be sure not to use hose
which might collapse.
S When the diaphragm pump is used in a forced-feed (flooded inlet)
situation, it is recommended that a “Check Valve” be installed at the
air inlet.
S Secure the diaphragm pump legs to a suitable surface to insure
against damage by vibration.
MAINTENANCE
S
Certain ARO “Smart Parts” are indicated which should be available
for fast repair and reduction of down time.
S Provide a clean work surface to protect sensitive internal moving
parts from contamination from dirtandforeign matter during service
disassembly and reassembly.
S Keep good records of service activity and include pump in preven-
tive maintenance program.
S Service Kits are available toservicetwo separate Diaphragm Pump
functions: 1. AIR SECTION, 2. FLUID SECTION. The Fluid Section
is divided further to match typical active MATERIAL OPTIONS.
TYPICAL CROSS SECTION
Figure 2
S HytrelR andVitonR are registered trademarks ofthe DuPont Co mpany S KynarR is a registered trademark of Arkema Inc. S
S Santoprene R is a registered trademark of Monsanto Company, licensed to AdvancedElastomer Systems, L.P. S LubriplateR is aregistered trademark of Lubriplate Division (Fiske Brothers Refining Company) S