Page 3 of 866605X-X(en)
GENERAL DESCRIPTION
TheARO diaphragm pump offers high volume delivery even at low air
pressureand a broad range of material compatibility options available.
Referto the model and option chart. ARO pumps feature stall resistant
design,modular air motor / fluid sections.
Airoperated double diaphragm pumps utilize a pressure differential in
theair chambers to alternately create suction and positive fluid pressure
inthe fluid chambers. Ball checks insure a positive flow of fluid.
Pumpcycling will begin as air pressure is applied and it will continue to
pumpand keep up with the demand. It will build and maintain line pres-
sureand will stop cycling once maximum line pressure is reached (dis-
pensingdevice closed) and will resume pumping as needed.
Models 666056-X and 66605H-X: The Acetal material used in these
pumpscontainsstainless steel fibers. It’s conductivity allows it to be con-
nectedto a suitable ground. A ground screw and ground wire kit is pro-
videdfor this.
AIR AND LUBE REQUIREMENTS
WARNIN G EXCESSIVE AIR PRESSURE. Can cause pump
damage,personal injury or property damage.
SAfilter capable of filtering out particles larger than 50 microns should
beused on the air supply.There is no lubrication required other than
the“O” ring lubricant which is applied during assembly or repair.
SIflubricatedair is present, make sure that it is compatible with the “O”
ringsand seals in the air motor section of the pump.
OPERATINGI NSTRUCTIONS
SAlwaysflush the pump with a solvent compatible with the material
beingpumped if the material being pumped is subject to “setting up”
whennot in use for a period of time.
SDisconnectthe air supply from the pump if it is to be inactive for a few
hours.
STheoutlet material volume is governed not only by the air supply but
alsoby the material supply available at the inlet. The material supply
tubingshould not be too small or restrictive. Be sure not to use hose
whichmight collapse.
SWhenthe diaphragm pump is used in a forced-feed (flooded inlet)
situation,it is recommended that a “Check Valve” be installed at the
airinlet.
SSecure the diaphragm pump legs to a suitable surface to insure
againstdamage by vibration.
MAINTENANCE
Referto the part views and descriptions as provided on page 4 through 7
forparts identification and Service Kit information.
SCertainARO “Smart Parts” are indicated which should be available
forfast repair and reduction of down time.
SServicekits are available to service two separate diaphragm pump
functions:1. AIR SECTION, 2. FLUID SECTION. The Fluid Section
isdivided further to match typical active MATERIAL OPTIONS.
SProvide a clean work surface to protect sensitive internal moving
partsfrom contamination from dirt and foreign matter during service
disassemblyand reassembly.
SKeepgood records of service activity and include pump in preven-
tivemaintenance program.
DUCKBILL CHECK VALVES(OPTIONAL)
Pumpmodelswith the suffix (-0CX or -0DX) come equipped with duckbill
typechecks. Standard duckbill pumps areshipped with the material inlet
inthe top and the material outlet on the bottom manifold. To change the
directionof flow,disassemble the pump as instructed in the FLUID SEC-
TIONand reassemble as described below.A pump that was factory built
withballs and seats can be retro-fitted with duckbill type check valves by
purchasingthe necessary parts and installing them as shown.
Reassembly:
Theduckbills maybe installed in either direction to produce flow from top
tobottom of the pump or from bottom to top of the pump. In either case,
allof the (42) duckbills must point in the same direction.
Flowfrom Top to Bottom: (see page 5)
1. With(15) fluid caps installed, stand the pump upside down.
2. Place (21) insert into (42) duckbill and slide (41) sleeve over (42)
duckbill.
3. Slidethe complete check assembly into the fluid cap bore with the
(21)insert end first. [Duckbills (42) point up.]
4. Position(19) “O” ring over (41) sleeve.
5. Attach(35) manifold feet / (36) swivel assembly to the fluid caps.
6. Turnpump over to right side up position.
7. Assembleduckbill check as in step #1.
8. Slidethe complete check assembly into the fluid cap bore with the
(41)sleeve end first. [Duckbill is pointing down toward fluid cap cav-
ity.]
9. Position(19) “O” ring around (21) insert.
10. Attach (34) manifold / (36) swivel assembly to fluid cap.
Flowfrom Bottom to Top: (Inlet Bottom - Outlet Top)
Toreverseflow direction, slide check valve assemblies into the (15) fluid
capsbackwardsfrom what is indicated in steps#2 and #7. In step #2, the
(42)duckbills will be pointing down and in step #7, they will be pointing
up.
SVitonRandHytrelRare registered trademarksof the DuPont Company SKynarRis a registered trademark of Arkema Inc. SFluorazRis a registered trademark of Greene, Tweed& Co. Inc. S
SSantopreneRisa registered trademarkof Monsanto Company, licensed to Advanced Elastomer Systems, L.P.S