PM20X-X-X-B02
OPERATOR’S MANUAL
RELEASED:
REVISED:
(REV. 03)
2-8-05
5-6-10
INCLUDING: OPERATION, INSTALLATION & MAINTENANCE
2” 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 the pump material options.
637309-XXforfluidsectionrepair(seepage4).NOTE:Thiskitalsocon-
tains several air motor seals which will need to be replaced.
637374-X major air valve assembly (see page 7).
637421 for air section repair (see page 6).
PUMP DATA
Models . . . . . . . . . . . . see Model Description Chart for “-XXX”.
Pump Type . . . . . . . . . Metallic Air Operated Double Diaphragm
Material . . . . . . . . . . . . see Model Description Chart.
Weight . . . PM20A-CSS-XXX-B02 . . . 142.8 lbs (64.8 kgs)
PM20S-CSS-XXX-B02 . . . 171.7 lbs (77.9 kgs)
Maximum Air Inlet Pressure . . . . . . . . . 120 p.s.i.g. (8.3 bar)
Maximum Material Inlet Pressure . . . . . 10 p.s.i.g. (0.69 bar)
Maximum Outlet Pressure . . . . . . . . . . 120 p.s.i.g. (8.3 bar)
Maximum Flow Rate . . . . . . . . . . . . . . 172 g.p.m. (651 l.p.m.)
Displacement / Cycle @ 100 p.s.i.g. . . . 1.4 gal. (5.3 lit.)
Maximum Particle Size . . . . . . . . . . . . 1/4” dia. (6.4 mm)
Maximum Temperature Limits (diaphragm / ball / seal material)
E.P.R. . . . . . . . . . . . . . . . . . -60_to280_F (-51_to 138_C)
SantopreneR . . . . . . . . . . . -40_to225_F (-40_to 107_C)
PTFE . . . . . . . . . . . . . . . . . 40_ to 225_ F (4_ to 107_ C)
Dimensional Data . . . . . . . . . . . . . . . . see page 8.
2” DIAPHRAGM PUMP
PM20S-CSS-XXX-B02
Figure 1
MODEL DESCRIPTION CHART
PM20 X - C S S - X X X - B02
CENTER SECTION MATERIAL
Mounting Dimension . . . . . 9-1/16” x 10-1/16” (230 mm x 256 mm)
Noise Level @ 70 p.s.i., 60 c.p.m.{ . . . . 85.0 db(A)|
A - Aluminum
S - Stainless Steel
Tested with 67263 muffler assembly installed.
PORT
The pump sound pressure levels published here have been updated to an Equivalent
C - Tri-Clamp
Continuous Sound Level (L ) to meet the intent of ANSI S1.13-1971, CAGI-PNEU-
Aeq
ROP S5.1 using four microphone locations.
FLUID CAPS & MANIFOLD MATERIAL
S - Stainless Steel
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.
HARDWARE MATERIAL
S - Stainless Steel
SEAT MATERIAL
A - Santoprene
S - 316 Stainless Steel
BALL MATERIAL
A - Santoprene
T - PTFE
DIAPHRAGM MATERIAL
A - Santoprene
T - PTFE / Santoprene
FLUID SECTION SERVICE KIT SELECTION
PM20X - CSS - X X X - B02
637309 - X X
EXAMPLE: MODEL # PM20S-CSS-SAA-B02
FLUID SECTION SERVICE KIT # 637309-AA
Ball
Diaphragm
INGERSOLL RAND COMPANY LTD
209 NORTH MAIN STREET – BRYAN, OHIO 43506
© 2010
(800) 495-0276 FAX(800) 892-6276
CCN 15227689
GENERAL DESCRIPTION
PARTS AND SERVICE KITS
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 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.
Refertothepartviewsanddescriptionsasprovidedonpage4through7
for parts identification and Service Kit information.
S Certain ARO “Smart Parts” are indicated 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 SEC-
TION is divided further to match typical part MATERIAL OPTIONS.
MAINTENANCE
S Provide a clean work surface to protect sensitive internal moving
partsfromcontaminationfromdirtandforeignmatter duringservice
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.
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 If lubricated air is present, make sure that it is compatible with the
Nitrile “O” rings in the air motor section of the pump.
FLUID SECTION DISASSEMBLY
1. Remove (61) outlet manifold, (60) inlet manifold.
2. Remove(22)balls, (19)“O”rings(whereapplicable)and(21)seats.
3. Remove (15) fluid caps.
OPERATING INSTRUCTIONS
NOTE: Only PTFE diaphragm models use a primary diaphragm (7) and
a backup diaphragm (8). Refer to the auxiliary view in the Fluid Section
illustration.
S Always flush the pump with a solvent compatible with the material
beingpumpedifthematerialbeing pumpedissubjectto “settingup”
when not in use for a period of time.
4. Removethe(6)diaphragmwasher,(7)or(7/8)diaphragms,and(5)
backup washer.
S Disconnecttheairsupplyfromthepumpifitistobeinactiveforafew
hours.
NOTE: Do not scratch or mar the surface of (1) diaphragm rod.
S Theoutletmaterialvolumeisgovernednotonlybytheairsupplybut
alsobythematerialsupplyavailableattheinlet.Thematerialsupply
tubing should not be too small or restrictive. Be sure not to use hose
which might collapse.
FLUID SECTION REASSEMBLY
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.
S Reassemble in reverse order. Refer to the torque requirements on
page 5.
S Clean and inspect all parts. Replace worn or damaged parts with
new parts as required.
S Lubricate (1) diaphragm rod and (144) “U” cup with LubriplateR
FML-2 grease (94276 grease packet is included in service kit).
S FormodelswithPTFEdiaphragms:Item(8)Santoprenediaphragm
is installed with the side marked “AIR SIDE” towards the pump cen-
ter body. Install the PTFE diaphragm (7) with the side marked
“FLUID SIDE” towards the (15) fluid cap.
S Re-check torque settings after pump has been re-started and run a
while.
S
SantopreneR is a registered trademark of Monsanto Company, licensed to Advanced Elastomer Systems, L.P.,
S
LubriplateR is a registered trademark of Lubriplate Division (Fiske Brothers)
PM20X-X-X-B02
Page 3 of 8
PARTS LIST / PM20X-X-X-B02 FLUID SECTION
FLUID SECTION SERVICE KITS (637309-XX)
L KITS INCLUDE: BALLS (See “Ball Options”, refer to -XX in chart below), DIAPHRAGMS (See “Diaphragm Options”, refer to -XX in
chart below), and items 19, 70, 144, 175, (listed below) plus 174 and 94276 Lubriplate FML-2 grease (page 6).
SEAT OPTIONS
PM20X-CSS-XXX-B02
BALL OPTIONS
PM20X-CSS-XXX-B02
NOTE: Seat options -AXX do not require
item 19 “O” ring.
“21”
L “22” (2-1/2” dia.)
-XXX Seat
Qty [Mtl]
(4) [SP]
(4) [SS]
-XXX Ball
Qty [Mtl]
-AXX 94328-A
-SXX 94353
-XAX 93358-A
-XTX 93358-4
(4) [SP]
(4)
[T]
DIAPHRAGM OPTIONS PM20X-CSS-XXX-B02
L “7” L “8”
-XX = (Ball)
-XXX -XX = (Diaphragm) Diaphragm Qty [Mtl] Diaphragm Qty [Mtl] Gasket
MATERIAL CODE
[A] = Aluminum
[B] = Nitrile
[C] = Carbon Steel
[Co] = Copper
[E] = E.P.R.
L SERVICE KIT
L “19”
Qty [Mtl]
[SP] = Santoprene
[SS] = Stainless Steel
[T] = PTFE
-XXA 637309-XA
-XXT 637309-XT
94329-A
94355-T
(2)
(2)
[SP] - - - - -
[T] 94330-A
- - -
- - - 94356
(4)
[E]
[T]
(2) [SP] Y328-237
(4)
CENTER SECTION PART OPTIONS PM20X-CSS-XXX-B02
ALUMINUM
STAINLESS STEEL
PM20A-CSS-XXX-B02 PM20S-CSS-XXX-B02
Item
Description (size)
Backup Washer
Qty Part No.
(2) 94357-1
(1) 94324-1
(1) 94324-2
(2) - - - - -
[Mtl] Part No.
[A] 94357-2
[A] 94349-1
[A] 94349-2
- - - Y17-51-S
- - - Y325-118
[B] - - - - -
[Mtl]
[SS]
[SS]
[SS]
[SS]
[B]
5
68 Air Cap
69 Air Cap
126 Pipe Plug (1/4 - 18 N.P.T. x 7/16”)
Ln 175 “O” Ring (3/32” x 1-1/16” o.d.)
(2) - - - - -
L n
(3/32” x 1” o.d.)
(2) Y325-117
(4) - - - - -
- - -
181 Roll Pin (5/32” o.d. x 3/4” long)
- - - Y178-56-S
[SS]
COMMON PARTS
Item
Description (size)
Qty Part No.
[Mtl]
Item
Description (size)
Qty Part No.
(1) 93004
(1) 95508
(1) 95509
(2) 94100
(4) 94531
(2) Y186-51
(4) 94098
[Mtl]
[Co]
[SS]
[SS]
[B]
43 Ground Lug
1
6
9
Rod
(1) 94358
(2) 94357-2
(2) 93065
[C]
Diaphragm Washer
Washer
[SS]
[SS]
[SS]
[SS]
[SS]
[SS]
[SS]
60 Inlet Manifold
61 Outlet Manifold
14 Screw (5/8” - 18 x 2-1/2”)
15 Fluid Cap
(2) Y5-111-T
(2) 95570-1
(8) 94409-2
(16) 94990
(16) 94992
L n 70 Gasket
131 Screw (M10 x 1.5 - 6g x 120 mm)
Ln 144 “U” Cup (3/16” x 1-3/8” o.d.)
n 180 Washer (0.406” i.d. x 0.031” thick)
[C]
26 Screw (M10 x 1.5 - 6g x 35 mm)
27 Screw (M10 x 1.5 - 6g x 45 mm)
29 Nut (M10 x 1.5 - 6g)
[B]
[Co]
n Air Motor Kit Parts, see page 6.
V “Smart Parts” keep these items on hand in addition to the Service Kits for fast repair and reduction of down time.
Page 4 of 8
PM20X-X-X-B02
PARTS LIST / PM20X-X-X-B02 FLUID SECTION
COLOR CODE
3
1
DIAPHRAGM BALL
MATERIAL
COLOR
COLOR
Santoprene
Santoprene
(Backup)
PTFE
Tan
Tan
Green
N / A
5
7
8
6
White
White
61
26 , G
FOR THE
AIR MOTOR SECTION
SEE PAGES 6 & 7
2
4
68
181
175 k 70 k 70 k
Torque Sequence
14 ,
29
1 k
69
5
7
6
9
22
21
19 z k
126 s 144 k
43
175 k 144 k
15
180 131 , x
G . 27
60
22
26 , G
21
19 z k
Figure 2
VIEW OF TWO PIECE PTFE DIAPHRAGM
. TORQUE REQUIREMENTS ,
NOTE: DO NOT OVERTIGHTEN FASTENERS.
ALL FASTENERS ARE METRIC.
(Santoprene) 8
7 (PTFE)
(14) Diaphragm screw, apply Loctite #271 to threads,
65 - 70 ft lbs (88.1 - 94.9 Nm).
(26 and 27) Fluid caps / manifold screw, 30 - 40 ft lbs
(40.7 - 54.2 Nm).
(131) Screw, 35 - 40 ft lbs (47.5 - 54.2 Nm).
LUBRICATION / SEALANTS
k
Apply Lubriplate FML-2 grease to all “O” rings,
“U” cups & mating parts.
x Apply Loctite 242 to threads at assembly.
s
Apply PTFE tape to threads at assembly.
Apply anti-seize compound to threads.
G
z
Used with PM20X-CSS-SXX-B02 models only.
Z Lubriplate FML-2 is a white food grade petroleum grease.
PM20X-X-X-B02
Page 5 of 8
PARTS LIST / PM20X-X-X-B02 AIR SECTION
n Indicates parts included in 637421 Air Section Service Kit shown below and items (70), (144), (175), (180) shown on page 4.
AIR MOTOR PARTS
Item
Description (size)
Qty Part No.
(1) 94028
(1) 94109
(1) 94092
(4) 95887
(1) 95651
(2) 94083
(2) 94084
(2) Y29-42-S
(1) 94099
[Mtl]
[A]
Item
Description (size)
Qty Part No.
(1) 67164
(2) 94433
(1) Y240-9
(1) 94081
(1) Y325-119
(1) Y325-22
(2) Y325-26
(2) Y325-202
(2) 94102
(1) 95666
(1) 95665
(1) 96336
(1) 96338
(2) 95991
(1) 96344
(1) Y325-5
(1) Y325-204
(1) Y325-208
[Mtl]
[D]
[U]
[B]
[Br]
[B]
[B]
[B]
[B]
[SP]
[B]
[B]
[A]
[SS]
[SS]
[B]
[B]
[B]
[B]
101 Center Body (PM20A-X-X-B02)
(PM20S-X-X-B02)
n 167 Pilot Piston (includes 168 and 169)
168 “O” Ring (3/32” x 5/8” o.d.)
169 “U” Cup (1/8” x 7/8” o.d.)
170 Piston Sleeve
[SS]
[D]
[SS]
[D]
[SS]
[D]
[SS]
[B]
103 Bushing
105 Screw (M6 x 1 - 6g x 20 mm)
111 Spool
n 171 “O” Ring (3/32” x 1-1/8” o.d.)
n 172 “O” Ring (1/16” x 1-1/8” o.d.)
n 173 “O” Ring (1/16” x 1-3/8” o.d.)
Kn 174 “O” Ring (1/8” x 1/2” o.d.)
n 176 Diaphragm (check valve)
n 199 Track Gasket
118 Actuator Pin (0.250” x 2.276” long)
121 Sleeve
128 Set Screw (1/4” - 20 x 1/4”)
n 132 Gasket
133 Lockwasher (1/4”) (PM20A-X-X-B02) (3) Y117-416-C
(PM20S-X-X-B02) (3) Y14-416-T
[C]
[SS]
[SS]
[A]
n 200 Gasket
134 Screw (M6 x 1 - 6g x 30 mm)
135 Valve Housing (PM20A-X-X-B02)
(PM20S-X-X-B02)
(4) 96358
(1) 96334-1
(1) 96337-1
(1) 96335
(1) 96339
(1) Y325-32
(1) 95966
(1) Y186-50
(1) 95650
(1) 95659
(1) Y325-118
(2) Y325-202
(1) 94026
233 Adapter Plate (PM20A-X-X-B02)
(PM20S-X-X-B02)
[SS]
[A]
240 Screw (M6 x 1 - 6g x 16 mm)
n 241 Track Gasket
136 Plug (PM20A-X-X-B02)
(PM20S-X-X-B02)
[SS]
[B]
[B]
n 242 “O” Ring (1/16” x 7/32” o.d.)
n 243 “O” Ring (1/8” x 5/8” o.d.)
n 244 “O” Ring (1/8” x 7/8” o.d.)
n 137 “O” Ring (1/16” x 2” o.d.)
n 138 “U” Cup (3/16” x 1.792” o.d.)
n 139 “U” Cup (3/16” x 1-1/4” o.d.)
140 Valve Insert
[B]
[Ck]
[Ck]
[B]
L n Lubriplate FML-2 Grease
(1) 94276
637308
141 Valve Plate
Lubriplate Grease Packets (10)
n 146 “O” Ring z (3/32” x 1-1/16” o.d.)
n 147 “O” Ring z (1/8” x 1/2” o.d.)
z Used on models PM20S-CSS-XXX-B02 only.
[B]
D
Used on models PM20A-CSS-XXX-B02 only.
n 166 Track Gasket D
[B]
K
Fluid Section Kit parts, see page 4.
AIR MOTOR SECTION SERVICE
MAJOR VALVE DISASSEMBLY
Service is divided into two parts - 1. Pilot Valve, 2. Major Valve.
GENERAL REASSEMBLY NOTES:
1. Remove (135) valve block and (233) adapter plate, exposing (166
and 132) gaskets and (176) checks.
2. Remove (233) adapter plate, releasing (140) valve insert, (141)
valveplate,(199,200and241)gasketsand(243and244)“O”rings.
3. Remove (136) plug and (137) “O” ring, releasing (111) spool.
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 Lubriplate FML-2 grease.
S Do not over-tighten fasteners, refer to torque specification block on
view.
S Re-torque fasteners following restart.
S SERVICE TOOLS -- To aid in the installation of (168) “O” rings onto
the (167) pilot piston, use tool # 204130-T, available from ARO.
MAJOR VALVE REASSEMBLY
1. Install new (138 and 139) “U” cups on (111) spool -- LIPS MUST
FACE EACH OTHER.
2. Insert (111) spool into (135) valve housing.
3. Install (137 and 242) “O” rings on (136) plug and assemble plug to
(135) valve housing, securing with (105) screws.
4. Install (140) valve insert, (141) valve plate, (199) gasket and (243
and244) “O” ringsinto(135) valvehousing. NOTE: Assemble(140)
valve insert with “dished” side toward (141) valve plate. Assemble
(141) valve plate with part number identification tpward (140) valve
insert.
PILOT VALVE DISASSEMBLY
1. A light tap on (118) should expose the opposite (121) sleeve, (167)
pilot piston and other parts.
2. Remove (170) sleeve, inspect inner bore of sleeve for damage.
5. Assemble (200 and 241) gaskets and (233) adapter plate to (135)
valve housing, securing with (240) screws.
PILOT VALVE REASSEMBLY
6. Assemble (132 and 166) gaskets and (176) checks to (101) center
body.
1. Clean and lubricate parts not being replaced from service kit.
2. Install new (171 and 172) “O” rings, replace (170) sleeve.
3. Installnew (168) “O” ringsand(169) seal -Note thelip direction. Lu-
bricate and replace (167).
7. Assemble (135) valve housing and components to (101) center
body, securing with (134) screws.
4. Reassemble remaining parts, replace (173 and 174) “O” rings.
Page 6 of 8
PM20X-X-X-B02
PARTS LIST / PM20X-X-X-B02 AIR SECTION
118
169 k 168 k
172 k
171 k
121
PILOT VALVE
PART GROUP
k 174
170
k 173
167
140
244 k 243 k 233
166 z k
132 k
199 k
173 k
121
118
135
133
174 k
103
101
141 k
200 k 241 k 128 = 240 ,
138 k
176 k
. 134
Optional 94117 Muffler
111
139 k
137 k
242
MAJOR
VALVE
128 =
136
Figure 3
105 ,
z Substitute these “O” rings for
“166” gasket on models
PM20S-CSS-XXX-B02.
. TORQUE REQUIREMENTS ,
NOTE: DO NOT OVERTIGHTEN FASTENERS.
ALL FASTENERS ARE METRIC.
Torque (105) Screw to 40 - 50 in. lbs (4.5 - 5.6 Nm).
Torque (134) Screw to 40 - 50 in. lbs (4.5 - 5.6 Nm).
Torque (240) Screw to 40 - 50 in. lbs (4.5 - 5.6 Nm).
MATERIAL CODE
[A] = Aluminum
[B] = Nitrile
[Br] = Brass
147 k
146 k
[C] = Carbon Steel
[Ck] = Ceramic
[D] = Acetal
[I] = Iron
[SP] = Santoprene
[SS] = Stainless Steel
[U] = Polyurethane
LUBRICATION / SEALANTS
Apply Lubriplate FML-2 grease to “O” rings, “U” Cups
& mating parts.
k
= Apply Loctite 271 to threads at assembly.
A replacement Major Valve Service Assembly is available separately, which includes the following:
637374-2 for models PM20A-X: 105 (4), 111, 128 (2), 132, 135, 136, 137, 138, 139, 140, 141, 166, 176 (2), 199, 200, 233, 240 (2), 241, 242, 243 and 244.
637374-4 for models PM20S-X: 105 (4), 111, 128 (2), 132, 135, 136, 137, 138, 139, 140, 141, 146, 147, 176 (2), 199, 200, 233, 240 (2), 241, 242, 243 and 244.
PM20X-X-X-B02
Page 7 of 8
TROUBLE SHOOTING
Product discharged from exhaust outlet.
S Check for diaphragm rupture.
S Check tightness of (14) diaphragm screw.
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-col-
lapsing type, capable of pulling a high vacuum.
S Check all joints on the inlet manifolds and suction connections.
These must be air tight.
Air bubbles in product discharge.
S Check connections of suction plumbing.
S Check “O” rings between intake manifold and inlet side fluid caps.
S Check tightness of (14) diaphragm screw.
Motor blows air or stalls.
S Check (176) check valve for damage or wear.
S Check for restrictions in valve / exhaust.
S Inspectthepumpforsolidobjectsloggedinthediaphragmchamber
or the seat area.
DIMENSIONAL DATA
(Dimensions shown are for reference only, they are displayed in inches and millimeters (mm).
21-5/8” (548.2 mm)
16-3/16” (411.1 mm)
12” (304.8 mm)
3” (76.2 mm)
2-1/2” Tri-Clamp
19-11/32” (491.3 mm)
Dotted lines show optional
67263 muffler assembly.
OUTLET
24-3/4”
(628.7 mm)
Air Inlet
3/4 - 14 N.P.T.F. - 1
13-9/16”
(344.5 mm)
26-9/32”
(667.4 mm)
Dotted lines show optional
67213 muffler kit.
2-1/2”
(63.5 mm)
INLET
Exhaust Port
9/16” Slot (14.3 mm)
9-1/16”
1-1/2 - 11-1/2 N.P.T.
(230.2 mm)
10-1/16”
2-1/2” Tri-Clamp
10-1/16”
(255.6 mm)
(255.6 mm)
Figure 4
PN 97999-1114
PM20X-X-X-B02
Page 8 of 8
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