Page 1
OPERATOR’S MANUAL
INCLUDING: OPERATION, INSTALLATION & MAINTENANCE
1” DIAPHRAGM PUMP
1:1 RATIO (METALLIC)
READ THIS MANUAL CAREFULLY BEFORE INSTALLING,
OPERATING OR SERVICING THIS EQUIPMENT.
It is the responsibility of the employer to place this information in the hands of the operator. Keep for future reference.
SERVICE KITS
Refer to “Model Description Chart”to match thepump material options.
637436 for air section repair (see page 6).
637425-XX for fluid section repair (see page 4).
PUMP DATA
Models see “Model Description Chart” for “-XXX”..........
Pump Type Metallic Air Operated Double Diaphragm.......
Material see “Model Description Chart”..........
Weight AD25A-XA
AD25A-XC
AD25A-XS
Maximum Air Inlet Pressure 120 p.s.i. (8.3 bar).........
Maximum Material Inlet Pressure 10 p.s.i. (0.69 bar).....
Maximum Outlet Pressure 120 p.s.i. (8.3 bar)..........
Maximum Flow Rate (flooded inlet) 35 g.p.m. (133 l.p.m.)...
Maximum Particle Size 1/8” dia. (3.2 mm)............
Maximum Temperature Limits (diaphragm / ball / seat material)
E.P.R. / EPDM -60_ to 280_ F(-51_ to 138_ C)......
R -20_ to 150_ F(-29_ to 66_ C)...........
Hytrel
Polypropylene 35_ to 150_ F(2_ to 66_ C).......
Santoprene
PTFE 40_ to 225_ F(4_ to 107_ C).............
R -40_ to 350_ F(-40_ to 177_ C)............
Viton
Dimensional Data see page 8................
Noise Level @ 70 p.s.i., 60 c.p.m. 64.5 db(A)*.....
* The pump sound pressure levels published here have been updated to an Equivalent Continuous
Sound Level (L
phone locations.
NOTICE: All possible options are shown in the chart. However, certain
combinations may not be recommended, consult a representative or the
factory if you have questions concerning availability.
) to meet the intent of ANSI S1.13-1971, CAGI-PNEUROP S5.1 using four micro-
Aeq
X-XXX 22.0 lbs (10.0 kg)... .......
X-XXX 35.3 lbs (16.0 kg)......
X-XXX 37.9 lbs (17.2 kg).......
R -40_ to 225_ F(-40_ to 107_ C).......
CENTER SECTION MATERIAL
A - Aluminum
THREAD
A - 1 ” N . P. T. F. - 1
B-Rp1-11BS
FLUID CAPS & MANIFOLD MATERIAL
A - Aluminum
C - Cast iron
S - Stainless Steel
HARDWARE MATERIAL
P - Carbon Steel
S - Stainless Steel
SEAT MATERIAL
F - Aluminum
P - Polypropylene
S - 316 Stainless Steel
BALL MATERIAL
A - Santoprene
C - Hytrel
T - PTFE
DIAPHRAGM MATERIAL
A - Santoprene
C - Hytrel
T - PTFE
FLUID SECTION SERVICE KIT SELECTION
EXAMPLE: MODEL # AD25A-ASS-SAA
FLUID SECTION SERVICE KIT # 637425-AA
AD25A-X-X
RELEASED: 4-22-05
REVISED: 5-20-10
(REV. 03)
AD25A-XXX-XXX
1’’ DIAPHRAGM PUMP
MODEL DESCRIPTION CHART
AD25 A -X X X -X X X
AD25A - XXX - X X X
637425 - X X
DiaphragmBall
INGERSOLL RAND COMPANY
209 NORTH MAIN STREET -- BRYAN, OHIO 43506
(800) 276-4658 D FAX (800) 266-7016
www.ingersollrandproducts.com
E2010 CCN 15242605
Page 2
OPERATING AND SAFETY PRECAUTIONS
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
READ, UNDERSTAND, AND FOLLOW THIS INFORMATION TO AVOID INJURY AND PROPERTY DAMAGE.
EXCESSIVE AIR PRESSURE
STATIC SPARK
WARNING
al injury, pump damage or property damage.
Do not exceed the maximum inlet air pressure as stated on the
pump model plate.
Be sure material hoses and other components are able to withstand fluid pressures developed bythis pump. Check all hoses
for damage or wear. Be certain dispensing device is clean and
in proper working condition.
WARNING
severe injury or death. Ground pump and pumping system.
Sparks can ignite flammable material and vapors.
The pumping system and object being sprayed must be
grounded when it is pumping, flushing, recirculating or spraying flammable materials such as paints, solvents, lacquers,
etc. or used in a location where surrounding atmosphere is
conducive to spontaneous combustion. Ground the dispensing valve or device, containers, hoses and anyobject to which
material is being pumped.
Use the pump grounding screw terminal provided. Use ARO
part no. 66885-1 ground kit or connect a suitable ground wire
(12 ga. min.) to a good earth ground source.
Secure pump, connections and all contact points to avoid
vibration and generation of contact or static spark.
Consult local building codes and electrical codes for specific
grounding requirements.
Aftergrounding, periodically verify continuity ofelectrical path
to ground. Test with an ohmmeter from each component (e.g.,
hoses, pump, clamps, container, spray gun, etc.) to ground to
insure continuity. Ohmmeter should show 0.1 ohms or less.
Submerse the outlet hose end, dispensing valve or device in
the material being dispensed if possible. (Avoid free streaming
of material being dispensed.)
Use hoses incorporating a static wire.
Use proper ventilation.
Keep inflammables away from heat, open flames and sparks.
Keep containers closed when not in use.
WARNING
causesevere injury.Pipe exhaustaway fromwork areaand personnel.
In the event of a diaphragm rupture material can be forced out
of the air exhaust muffler.
Pipe the exhaust to a safe remote locationwhen pumping hazardous or inflammable materials.
Use a grounded 3/8” minimum i.d. hose between the pump and
the muffler.
WARNING
injury or property damage. Do not service or clean pump,
hoses or dispensing valve while the system is pressurized.
Disconnect air supply line and relieve pressure from the system by opening dispensing valve or device and / or carefully
and slowly loosening and removing outlet hose or piping from
pump.
EXCESSIVE AIR PRESSURE. Can cause person-
STATICSPARK.Can cause explosion resulting in
Pump exhaust may contain contaminants. Can
HAZARDOUS PRESSURE. Can result in serious
HAZARDOUS MATERIALS
HAZARDOUS PRESSURE
WARNING
jury or property damage. Do not attempt to return a pump to the
factory or service center that contains hazardous material.
Safe handling practices must comply with local and national
laws and safety code requirements.
Obtain Material Safety Data Sheets on all materials from the
supplier for proper handling instructions.
WARNING
num wetted parts cannot be used with III.-Trichloroethane,Methylene Chloride or other Halogenated Hydrocarbon solvents
which may react and explode.
Check pump motor section, fluid caps, manifolds and all
wetted parts to assure compatibility before using with solvents
of this type.
CAUTION
wetted parts and the substance being pumped, flushed or recirculated. Chemical compatibility may change with temperature and concentration of the chemical(s) within the
substances being pumped, flushed or circulated. For specific
fluid compatibility, consult the chemical manufacturer.
CAUTION
cal stress only. Certain chemicals will significantly reduce
maximum safe operating temperature. Consult the chemical
manufacturer for chemical compatibility and temperature limits.RefertoPUMPDATAonpage1ofthismanual.
CAUTION
been trained for safe working practices, understand it’s limitations, and wear safety goggles / equipment when required.
CAUTION
the piping system. Be certain the system components are
properly supported to prevent stress on the pump parts.
Suction and discharge connections should be flexibleconnec tions (such as hose), not rigid piped, and should be compatible
with the substance being pumped.
CAUTION
notallow pump to operate when out of material for long periods
of time.
Disconnect air line from pump when system sits idle for long
periods of time.
CAUTION
sure compatible pressure rating and longest service life.
NOTICE
request: ‘‘Static Spark PN \ 93616-1 & Diaphragm Rupture PN\
93122.”
WARNING
CAUTION
NOTICE
HAZARDOUSMATERIALS.Can cause seriousin-
EXPLOSION HAZARD. Models containing alumi-
Verify the chemical compatibility of the pump
Maximum temperatures are based on mechani-
Be certain all operators of this equipment have
Do not use the pump for the structural support of
Prevent unnecessary damage to the pump. Do
Use only genuine ARO replacement parts to as-
Replacement warning labels are available upon
= Hazards or unsafe practices which could
result in severe personal injury, death or
substantial property damage.
= Hazards or unsafe practices which could
result in minor personal injury, product or
property damage.
= Important installation, operation or
maintenance information.
AD25A-X-XPage 2 of 8
Page 3
GENERAL DESCRIPTION
MAINTENANCE
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 chambers to alternately create suction and positive fluid pressure
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 pressure and will stop cycling once maximum line pressure is reached (dispensing device closed) and will resume pumping as needed.
AIR AND LUBE REQUIREMENTS
WARNING
damage, personal injury or property damage.
EXCESSIVE AIR PRESSURE. Can cause pump
S A filter capable offiltering out particleslarger than 50 microns should
be used on the air supply.There is no lubrication required other than
the “O” ring lubricant which is applied during assembly or repair.
S If lubricated air is present, make sure that it is compatible with the
Nitrile “O” rings 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 material being pumped is subject to “setting up”
when not in use for a period of time.
S Disconnect the air supply fromthe pump if it is to be inactive for a few
hours.
S 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 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.
Refer to the part viewsand descriptions asprovided on page 4 through 7
for parts identification and Service Kit information.
S Certain ARO “Smart Parts” areindicated which should be available
for fast repair and reduction of down time.
S Service kits are divided to service two separate diaphragm pump
functions: 1. AIR SECTION,2. FLUID SECTION. The FLUID SECTION is divided further to match typical partMATERIAL OPTIONS.
S Provide a clean work surface to protect sensitive internal moving
parts from contamination from dirt and foreign matter during service
disassembly and reassembly.
S Keep good records of service activity and include pump in preven-
tive maintenance program.
S Before disassembling, empty captured material in the outlet man-
ifold by turning the pump upside down to drain material from the
pump.
FLUID SECTION DISASSEMBLY
1. Remove top manifold(s).
2. Remove (22) balls, (19) “O” rings, (21) seats.
3. Remove (15) fluid caps.
NOTE:OnlyPTFE diaphragmmodels usea primarydiaphragm (7)and a
backup diaphragm (8). Refer to theauxiliary view inthe Fluid Sectionillustration.
4. Remove the (6) nut, (7) or (7 / 8) diaphragms and (5) washers.
5. Remove (3) “O” rings.
NOTE: Do not scratch or mar the surface of (1) diaphragm rod.
FLUID SECTION REASSEMBLY
S Reassemble in reverse order.
S Clean and inspect all parts. Replace worn or damaged parts with
new parts as required.
S Lubricate(1) diaphragm rod and (2) “O” ringwith Key-LubeR grease.
S Use ARO pn / 98930-T bullet (installation tool) to aid in installation of
(2) “O” ring on (1) diaphragm rod.
S Be certain (7) or (7 / 8) diaphragm(s) align properly with (15) fluid
caps before making final torque adjustments on bolt and nuts to
avoid twisting the diaphragm.
S For models with PTFE diaphragms: Item(8) Santoprene diaphragm
is installed with the side marked “AIR SIDE”towards the pump center body. Install the PTFE diaphragm with the side marked “FLUID
SIDE” towards the fluid cap.
S Re-check torque settings after pump hasbeen re-started and run a
while.
S VitonR and HytrelR are trademarks of the DuPont Company, S SantopreneR is a registered trademark of Monsanto Company, licensed to Advanced Elastomer Systems, L.P. S Key-LubeR is a registered trademark of Key Industries
Page 3 of 8AD25A-X-X
Page 4
PARTS LIST / AD25A-X-X FLUID SECTION
FLUID SECTION SERVICE KITS
L KITS INCLUDE: BALLS (See BALL Option, refer to -XX in chart below), DIAPHRAGMS (See DIAPHRAGM Option, refer to -XX in chart below),
plus “O” Ring items: 2, 3, 19 and 93706-1 Key-Lube grease.
SEAT OPTIONS
AD25A-XXX-X
“21”
-XXX Seat Qty [Mtl] -XXX Ball Qty [Mtl]
-FXX 92008 (4) [A] -XAX 90532-A (4) [SP]
-PXX 92926 (4) [P] -XCX 90532-C (4) [H]
-SXX 90428 (4) [SS] -XTX 90532-4 (4) [T]
XX
BALL OPTIONS
AD25A-XXX-XX
L “22” (1” dia.)
X
[A] = Aluminum [H] = Hytrel
[B] = Nitrile [P] = Polypropylene
[C] = Carbon Steel [SP] = Santoprene
[CI] = Cast Iron [SS] = Stainless Steel
[Co] = Copper [T] = PTFE
[E] = E.P.R. [V] = Viton
MATERIAL CODE
DIAPHRAGM OPTIONS AD25A-XXX-XXX
L Service Kit L “7” L “8” L “3” L “19”
-XX = (Ball)
-XXX
-XX
= (Diaphragm)
-XXA 637425-XA 90533-B (2) [SP] ----- --- --- Y328-14 (4) [T] 90534 (4) [E]
-XXC 637425-XC 90533-9 (2) [H] ----- --- --- Y328-14 (4) [T] Y327-126 (4) [V]
-XXT 637425-XT 93459-4 (2) [T] 92973-B (2) [SP] Y328-14 (4) [T] Y328-126 (4) [T]
Diaphragm Qty [Mtl] Diaphragm Qty [Mtl]
“O” Ring
(1/16” x 5/8” o.d.) Qty [Mtl]
“O” Ring
(3/32” x 1-9/16” o.d.) Qty [Mtl]
MANIFOLD / FLUID CAP MATERIAL OPTIONS AD25A-XXX-XXX
ALUMINUM CAST IRON STAINLESS STEEL
AD25A-AAX- AD25A-BAX- AD25A-ACX- AD25A-BCX- AD25A-ASX- AD25A-BSX-
N.P.T. BSP N.P.T. BSP N.P.T. BSP
Item Description (size) Qty Part No. [Mtl] Part No. [Mtl] Part No. [Mtl] Part No. [Mtl] Part No. [Mtl] Part No. [Mtl]
V 6 Washer (fluid side) (2) 93441-2 [C] 93441-2 [C] 93441-2 [C] 93441-2 [C] 93441-1 [SS] 93441-1 [SS]
15 Fluid Cap (2) 94945 [A] 94945 [A] 94277 [CI] 94277 [CI] 91045 [SS] 91045 [SS]
16 Manifold (2) 92001 [A] 92001-1 [A] 94278 [CI] 94278-1 [CI] 91044 [SS] 91044-1 [SS]
HARDWARE OPTIONS AD25A-XXX-XXX
Carbon Steel Stainless Steel
AD25A-XXP-XXX AD25A-XXS-XXX
Item Description (size) Qty Part No. [Mtl] Part No. [Mtl]
26 Bolt (5/16” - 18 x 1”) (8) Y6-55-C [C] Y6-55-T [SS]
29 Nut (5/16” - 18) (16) Y12-5-C [C] Y12-5-S [SS]
COMMON PARTS
Item Description (size) Qty Part No. [Mtl] Item Description (size) Qty Part No. [Mtl]
V 1 Rod (1) 98724-1 [C]
L 2 “O” Ring (3/32” x 3/4” o.d.) k (1) Y330-113 [B]
5 Washer - (air side) (3-5/8” o.d.) (2) 93441-2 [C]
Service Note: Part No. 98930-T installation tool is available separately for use with items 1 and 2.
9 Washer (0.505” i.d.) (2) 93189-1 [SS]
14 Screw (1/2” - 20 x 1”) (2) Y5-85-T [SS]
43 Ground Lug (see page 7) (1) 93004 [Co]
V “Smart Parts” keep these items on hand in addition to the Service Kits for fast repair and reduction of down time.
AD25A-X-XPage 4 of 8
Page 5
PARTS LIST / AD25A-X-X FLUID SECTION
COLOR CODE
MATERIAL COLOR COLOR
Hytrel Cream Cream
Santoprene Cream
Santoprene Green N/A
(Backup)
PTFE White White
See item 8 in inset below.
*
DIAPHRAGM BALL
*
AIR
INLET
Cream
AIR MOTOR SECTION
SEE PAGES 6 & 7
. TORQUE REQUIREMENTS ,
NOTE: DO NOT OVERTIGHTEN FASTENERS
(14) Diaphragm bolt 25 - 30 ft lbs (33.9 - 40.7 Nm), apply Loctite 271 to threads.
(26) Bolts and (29) nuts 120 - 140 in. lbs (13.6 - 15.8 Nm).
LUBRICATION / SEALANTS
k Apply Key-Lube to all “O” rings, “U” Cups & mating parts.
Apply anti-seize compound to threads and bolt and nut flange heads which
contact pump case when using stainless steel fasteners.
d NOTE: Radius edge of parts (5 and 6) is against diaphragm.
FOR THE
12 k 3 k 5 d
7
3 k
14 ,
3
5
7
Torque Sequence
1
8
6
42
26 ,
16
22
19 k
21
AIR SIDE
SANTOPRENE
(GREEN when
used as backer)
Countersink
FLUID SIDE
PTFE
(WHITE)
78
AIR
SIDE
FLUID
SIDE
AIR
SIDE
6 d
9
FLUID
SIDE
29 ,
15
22
21
19 k
16
26 ,
View for AD25A-XXX-XXT (PTFE diaphragm) configuration only.
CROSS SECTION VIEW OF DIAPHRAGMS
Figure 1
Page 5 of 8AD25A-X-X
Page 6
PARTS LIST / AD25A-X-X AIR MOTOR SECTION
n Indicates parts included in 637436 Air Section Service Kit.
SERVICE KIT NOTE: Service Kit 637436 is a general repair kit for all 1” and larger ARO diaphragm pump air motors.
It contains extra “O” Rings and extra parts that may not be needed to service this model.
Item Description (size) Qty Part No. [Mtl] Item Description (size) Qty Part No. [Mtl]
101 Motor Body (1) 94743 [A]
n102 “O” Ring (1/16” x 1” o.d.) (2) Y325-20 [B]
V 103 Sleeve (1) 94527 [D]
n104 Retaining Ring, TruArc (0.925” i.d.) (2) Y145-25 [C]
105 Screw/Wshr (1/4”-20 x 5/8”) (AD25A-XXP-) (8) 93860 [C]
Cap Screw (1/4”-20 x 5/8”) (AD25A-XXS-) (8) Y6-42-T [SS]
106 Lockwasher (1/4”) (AD25A-XXS-) (8) Y14-416-T [SS]
107 Leg (AD25A-XXP-) (2) 92003 [C]
(AD25A-XXS-) (2) 92003-1 [SS]
n108 Gasket (with notch) (1) 92878 [B/Ny]
V 109 Piston (1) 92011 [D]
n110 “U” Cup(3/16” x 1-3/8” o.d.) (1) Y186-51 [B]
V 111 Spool (1) 92005 [A]
V 112 Washer (1.557” o.d.) (5) 92877 [Z]
n113 “O” Ring(small) (1/8” x 1-1/4” o.d.) (5) Y325-214 [B]
n114 “O” Ring(large) (3/32” x 1-9/16” o.d.) (6) Y325-126 [B]
V 115 Spacer (4) 92876 [Z]
V 116 Spacer (1) 92006 [Z]
n117 Gasket (1) 92004 [B/Ny]
118 Pilot Rod (1) 93309-1 [C]
n119 “O” Ring(1/8” x 3/4” o.d.) (4) 93075 [U]
120 Spacer (3) 115959 [Z]
121 Sleeve Bushing (2) 98723-1 [Bz]
n122 “O” Ring (3/32” x 9/16” o.d.) (2) 94820 [U]
n123 Screw (#8 - 32 x 3/8”) (4) Y154-41 [C]
124 Stud (5/16” - 18 x 1-3/4”) (AD25A-XXP-) (16) 92866 [C]
(5/16” - 18 x 1-3/4”) (AD25A-XXS-) (16) 92866-1 [SS]
128 Pipe Plug (1/8 - 27 N.P.T . x 1/4”) (1) Y227-2-L [C]
133 Lockwasher (1/4”) (1) Y14-416-T [SS]
197 Button Head Screw (1/4” - 20 x 1/4”) (2) 94987 [SS]
198 Button Head Screw (1/4” - 20 x 3/8”) (1) 94987-1 [SS]
201 Muffler (1) 93110 [C]
n Key-Lube “O” Ring Lubricant (1) 93706-1
10 Pak of Key-Lube 637175
AIR MOTOR SECTION SERVICE
Service is divided into two parts - 1. Pilot Valve, 2. Major Valve.
GENERAL REASSEMBLY NOTES:
S Air Motor Section Service is continued from Fluid Section repair.
S Inspect and replace old parts with new parts as necessary. Look for
deep scratches on metallic surfaces, and nicks or cuts in “O” rings.
S Take precautions to prevent cutting “O” rings upon installation.
S Lubricate “O” rings with Key-Lube grease.
S Do not over-tighten fasteners, refer to torque specification block on
view.
S Re-torque fasteners following restart.
PILOT VALVE DISASSEMBLY
1. Remove (104) retaining ring.
2. Remove (123) screws and (122) “O” rings.
3. Remove (118) piston rod, (121) sleeve bushing, (119) “O” rings and
(120) spacers from the (101) motor body.
4. Remove (103) sleeve and (102) “O” rings.
PILOT VALVE REASSEMBLY
1. Replace two (102) “O” rings if worn or damaged and reinstall (103)
sleeve.
2. Install one of the (121) sleeve bushings, (119) “O” rings, (120)
spacers and the remaining (121) bushing.
3. Carefully push (118) pilot rod into bushings etc. and retain on each
end with the two (122) “O” rings, retain with (123) screws.
4. Replace (104) retaining rings.
n Parts Y145-26 (1.156” i.d.) (Qty 2) Retaining Rings and Y325-24 “O” Rings
(Qty 2) are included in the Service Kit for the repair of larger pumps.
MATERIAL CODE
[A] = Aluminum [C] = Carbon Steel [U] = Polyurethane
[B] = Nitrile [D] = Acetal [SS] = Stainless Steel
[Bz] = Bronze [Ny] = Nylon [Z] = Zinc
MAJOR VALVE DISASSEMBLY
1. Remove (107) plate (or leg depending on model), (108 and 117)
gaskets.
2. On the side opposite the air inlet, push on the inner diameter (111)
spool. This will forcethe (109) piston out. Continuepushing the (111)
spool and remove. Check for scratches and gouges.
3. Reach into the air section (exhaust side) and remove (116) spacer,
(115) spacers, (113) “O” rings, (114) “O” rings, (112) washers, etc.
Check for damaged “O” rings.
MAJOR VALVE REASSEMBLY
1. Replace (112) washer, (114) “O” ring and (113) “O” ring onto (115)
spacer and insert etc.
NOTE: Be careful to orient spacer legs away from blocking internal ports.
2. Lubricate and carefully insert (111) spool.
3. Install (117) gasket and (107).
4. Lubricate and install (110) packing cup and insert (109) piston into
(air inlet side) cavity, the (110)packing cup lips shouldpoint outward.
5. Install (108) gasket and replace (107).
V “Smart Parts”Keep these items on hand in addition to the ServiceKits for fast repair and reduction of down time.
AD25A-X-XPage 6 of 8
Page 7
PARTS LIST / AD25A-X-X AIR MOTOR SECTION
BE CERTAIN TO ORIENT (115) SPACER LEGS
IMPORTANT
AWAY FROM BLOCKING INTERNAL PORTS
WHEN REASSEMBLING AIR SECTION.
115 116
k 114
k 113
112
Z 128
101
z 197
104
z 123
121
43
201
111
117
MAJOR VALVE
See cross section detail figure 3.
107
Figure 2
124
197 z
102 k
103 k
106
. 105
107
133
z 198
109
110 k
108
MAJOR VALVE CROSS SECTION DETAIL
109 110 k 112 114 k 113 k 115 111 k 116
Figure 3
119 k
123
z121
PILOT
VALVE
TORQUE REQUIREMENTS ,
.
NOTE: DO NOT OVERTIGHTEN FASTENERS
(105) 40 - 50 in. lbs (4.5 - 5.6 Nm).
k Apply Key-Lube grease to all “O” rings, “U” Cups &
mating parts.
z Apply Loctite 271 to threads.
Z Apply pipe sealant to threads.
LUBRICATION / SEALANTS
102 k
104
118 k
122 k120
Page 7 of 8AD25A-X-X
Page 8
TROUBLE SHOOTING
Product discharged from exhaust outlet.
S Check for diaphragm rupture.
S Check tightness of diaphragm nut.
Air bubbles in product discharge.
S Check connections of suction plumbing.
S Check “O” rings between intake manifold and fluid caps.
S Check tightness of diaphragm nut.
DIMENSIONAL DATA
(Dimensions shown are for reference only, they are displayed in inches and millimeters (mm).
8” (203 mm)
Low output volume, erratic flow, or no flow.
S Check air supply.
S Check for plugged outlet hose.
S Check for kinked (restrictive) outlet material hose.
S Check for kinked (restrictive) or collapsed inlet material hose.
S Check for pump cavitation -- suction pipe should be sized at least as
large as the inlet thread diameter of the pump for proper flow if high
viscosity fluids are being pumped. Suction hose must be a non-collapsing type, capable of pulling a high vacuum.
S Check all joints on the inlet manifolds and suction connections.
These must be air tight.
S Inspect the pump for solid objects logged in the diaphragm chamber
or the seat area.
8-9/16” (217.5 mm)
1 - 11 -1 / 2 N.P.T.F. - 1
Outlet
(AD25A-AXX-XXX)
1-11B.S.P.
(AD25A-BXX-XXX)
12-1/2”
(318 mm)
6-1/4” (159 mm)
7-5/16” (186 mm)
11-9/16”
(294 mm)
1-1/4” (32 mm)
Air Inlet
1/4 - 18 N.P.T.
6-11/16”
(169.8 mm)
Inlet
4” (102 mm)
13/32” Slot
(10 mm)
Figure 4
PN 97999-1151
AD25A-X-XPage 8 of 8
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