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Page 3of 866605X-X(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
theairchamberstoalternatelycreatesuctionandpositivefluidpressure
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 keepup with the demand.It will build and maintainline pres-
sure and will stop cycling once maximum line pressure is reached (dis-
pensing device closed) and will resume pumping as needed.
Models 666056-X and 66605H-X: The Acetal material used in these
pumpscontainsstainlesssteelfibers.It’sconductivityallowsittobecon-
nected to a suitable ground.A ground screw and ground wire kit is pro-
vided for this.
AIR AND LUBE REQUIREMENTS
WARNING
EXCESSIVE AIR PRESSURE. Can cause pump
damage, personal injury or property damage.
S Afiltercapableoffilteringoutparticleslargerthan50micronsshould
beusedontheairsupply.Thereisnolubricationrequiredotherthan
the “O” ring lubricant which is applied during assembly or repair.
S Iflubricatedairispresent,makesurethatitiscompatiblewiththe“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
beingpumpedifthe materialbeingpumpedis subjectto“settingup”
when not in use for a period of time.
S Disconnecttheairsupplyfromthepumpifitistobeinactiveforafew
hours.
S Theoutletmaterialvolumeisgovernednotonlybytheairsupplybut
alsobythematerialsupplyavailableattheinlet.Thematerialsupply
tubingshould notbe toosmallorrestrictive. Besurenot tousehose
which might collapse.
S When the diaphragm pump is used in a forced-feed (flooded inlet)
situation, itis recommendedthata “CheckValve” beinstalledat the
air inlet.
S Secure the diaphragm pump legs to a suitable surface to insure
against damage by vibration.
MAINTENANCE
Refertothepartviewsanddescriptionsasprovidedonpage4through7
for parts identification and Service Kit information.
S Certain ARO“Smart Parts” areindicated whichshould be available
for fast repair and reduction of down time.
S Service kits are available to service twoseparate diaphragm pump
functions:1. AIRSECTION, 2.FLUIDSECTION. TheFluid Section
is divided further to match typical active MATERIAL OPTIONS.
S Provide a clean work surface to protect sensitive internal moving
partsfromcontaminationfrom dirtandforeignmatter duringservice
disassembly and reassembly.
S Keep good records of service activity and include pump in preven-
tive maintenance program.
DUCKBILL CHECK VALVES (OPTIONAL)
Pumpmodelswiththesuffix(-0CXor-0DX)comeequippedwithduckbill
typechecks.Standardduckbillpumpsareshippedwiththematerialinlet
in thetop andthe material outleton the bottommanifold. To changethe
directionofflow,disassemblethepumpasinstructedintheFLUIDSEC-
TIONandreassembleasdescribedbelow.Apumpthatwasfactorybuilt
withballsandseatscanberetro-fittedwithduckbilltypecheckvalvesby
purchasing the necessary parts and installing them as shown.
Reassembly:
Theduckbillsmaybeinstalledineitherdirectiontoproduceflowfromtop
to bottomof thepump or frombottom to topof the pump.In either case,
all of the (42) duckbills must point in the same direction.
Flow from 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. Slide the 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. Turn pump over to right side up position.
7. Assemble duckbill check as in step #1.
8. Slide the complete check assembly into the fluid cap bore with the
(41)sleeveend first.[Duckbill ispointing downtowardfluidcap cav-
ity.]
9. Position (19) “O” ring around (21) insert.
10. Attach (34) manifold / (36) swivel assembly to fluid cap.
Flow from Bottom to Top: (Inlet Bottom - Outlet Top)
Toreverseflowdirection,slidecheckvalveassembliesintothe(15)fluid
capsbackwardsfromwhatisindicatedinsteps#2and#7.Instep#2,the
(42) duckbills will be pointing down and in step #7, they will be pointing
up.
SVitonRandHytrelRareregisteredtrademarksoftheDuPontCompanySKynarRisaregisteredtrademarkofArkemaInc.SFluorazRisaregisteredtrademarkofGreene,Tweed&Co.Inc.S
SSantopreneRisaregisteredtrademarkofMonsantoCompany,licensedtoAdvancedElastomerSystems,L.P.S