Page 1
OPERATOR’S MANUAL
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-XX for fluid section repair (see page 4). NOTE: This kit also con-
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
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_ to 280_ F (-51_ to 138_ C).................
SantopreneR -40_ to 225_ F (-40_ to 107_ C)...........
PTFE 40_ to 225_ F (4_ to 107_ C).................
Dimensional Data see page 8.................
Mounting Dimension 9-1/16” x 10-1/16” (230 mm x 256 mm).....
Noise Level @ 70 p.s.i., 60 c.p.m.
Tested with 67263 muffler assembly installed.
The pump sound pressure levels published here have been updated to an Equivalent
Continuous Sound Level (L
ROP S5.1 using four microphone 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.
-CSS-XXX-B02 142.8 lbs (64.8 kgs)... ...
-CSS-XXX-B02 171.7 lbs (77.9 kgs)...
PM20S
Aeq
{ 85.0 db(A)|....
) to meet the intent of ANSI S1.13-1971, CAGI-PNEU-
2” DIAPHRAGM PUMP
PM20S-CSS-XXX-B02
CENTER SECTION MATERIAL
A - Aluminum
S - Stainless Steel
PORT
C - Tri-Clamp
FLUID CAPS & MANIFOLD MATERIAL
S - Stainless Steel
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
EXAMPLE: MODEL # PM20S-CSS-SAA-B02
FLUID SECTION SERVICE KIT # 637309-AA
PM20X-X-X-B02
RELEASED: 2-8-05
REVISED: 5-6-10
(REV. 03)
Figure 1
MODEL DESCRIPTION CHART
PM20 X -C S S -X X X - B02
PM20X - CSS - X X X - B02
637309 - X X
DiaphragmBall
INGERSOLL RAND COMPANY LTD
209 NORTH MAIN STREET – BRYAN, OHIO 43506
(800) 495-0276 FAX(800) 892-6276
www.ingersollrandproducts.com
© 2010
CCN 15227689
Page 2
OPERATING AND SAFETY PRECAUTIONS
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.
EXCESSIVE AIR PRESSURE. Can cause person-
HAZARDOUS MATERIALS
HAZARDOUS PRESSURE
S Do not exceed the maximum inlet air pressure as stated on the
pump model plate.
S Be sure material hoses and other components are able to with-
stand fluid pressures developed by this 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.
STATIC SPARK.Can cause explosion resulting in
S 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.
S Secure pump, connections and all contact points to avoid
vibration and generation of contact or static spark.
S Consult local building codes and electrical codes for specific
grounding requirements.
S Aftergrounding, periodically verifycontinuity of electricalpath
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.
S Submerse the outlet hose end, dispensing valve or device in
the material being dispensed if possible. (Avoid free streaming
of material being dispensed.)
S Use hoses incorporating a static wire.
S Use proper ventilation.
S Keep inflammables away from heat, open flames and sparks.
S Keep containers closed when not in use.
WARNING
causesevere injury.Pipe exhaust away from workarea and personnel.
Pump exhaust may contain contaminants. Can
S In the event of a diaphragm rupture, material can be forced out
of the air exhaust muffler.
S Pipe the exhaust to a safe remote location when pumping haz-
ardous or inflammable materials.
S Use a grounded 1” 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.
HAZARDOUS PRESSURE. Can result in serious
S Disconnect air supply line and relieve pressure from the sys-
tem by opening dispensing valve or device and / or carefully
and slowly loosening and removing outlet hose or piping from
pump.
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.
HAZARDOUSMATERIALS.Cancause serious in-
S 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.
EXPLOSION HAZARD. Models containing alumi-
S Check pump motor section, fluid caps, manifolds and all
wetted parts to assure compatibilitybefore using with solvents
of this type.
WARNING
containing aluminum wetted parts with food products for hu man consumption. Plated parts can contain trace amounts of
lead.
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.
MISAPPLICATION HAZARD. Do not use models
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
S Suction and discharge connections should be flexible connec-
tions (such as hose), not rigid piped, and should be compatible
with the substance being pumped.
CAUTION
not allow pump to operatewhen outof materialfor long periods
of time.
Prevent unnecessary damage to the pump. Do
S 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 & Diaphragm Rupture” pn \ 94080.
WARNING
CAUTION
NOTICE
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.
PM20X-X-X-B02Page 2 of 8
Page 3
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
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 of filtering out particles larger 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 from the 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 views and descriptions as provided on page 4 through 7
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.AIRSECTION,2.FLUIDSECTION.TheFLUIDSECTION is divided further to match typical part MATERIAL OPTIONS.
MAINTENANCE
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 (61) outlet manifold, (60) inlet manifold.
2. Remove (22) balls, (19) “O” rings (where applicable) and (21) seats.
3. Remove (15) fluid caps.
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.
4. Remove the (6) diaphragm washer, (7) or (7 / 8) diaphragms, and (5)
backup washer.
NOTE: Do not scratch or mar the surface of (1) diaphragm rod.
FLUID SECTION REASSEMBLY
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 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 (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)
Page 3 of 8PM20X-X-X-B02
Page 4
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
“21” L “22” (2-1/2” dia.)
-XXX Seat Qty [Mtl] -XXX Ball Qty [Mtl]
-AXX 94328-A (4) [SP] -XAX 93358-A (4) [SP]
-SXX 94353 (4) [SS] -XTX 93358-4 (4) [T]
DIAPHRAGM OPTIONS PM20X-CSS-XXX-B02
L SERVICE KIT L “7” L “8” L “19”
-XX = (Ball)
-XXX
-XXA 637309-XA 94329-A (2) [SP] ----- --- --- 94356 (4) [E]
-XXT 637309-XT 94355-T (2) [T] 94330-A (2) [SP] Y328-237 (4) [T]
= (Diaphragm) Diaphragm Qty [Mtl] Diaphragm Qty [Mtl] Gasket Qty [Mtl]
-XX
CENTER SECTION PART OPTIONS PM20X-CSS-XXX-B02
ALUMINUM STAINLESS STEEL
PM20A-CSS-XXX-B02 PM20S-CSS-XXX-B02
Item Description (size) Qty Part No. [Mtl] Part No. [Mtl]
5 Backup Washer (2) 94357-1 [A] 94357-2 [SS]
68 Air Cap (1) 94324-1 [A] 94349-1 [SS]
69 Air Cap (1) 94324-2 [A] 94349-2 [SS]
126 Pipe Plug (1/4 - 18 N.P.T. x 7/16”) (2) ----- --- Y17-51-S [SS]
Ln 175 “O” Ring (3/32” x 1-1/16” o.d.) (2) ----- --- Y325-118 [B]
Ln (3/32” x 1” o.d.) (2) Y325-117 [B] ----- ---
181 Roll Pin (5/32” o.d. x 3/4” long) (4) ----- --- Y178-56-S [SS]
NOTE: Seat options -AXX do not require
item 19 “O” ring.
MATERIALCODE
[A] = Aluminum
[B] = Nitrile
[C] = Carbon Steel
[Co] = Copper
[E] = E.P.R.
[SP] = Santoprene
[SS] = Stainless Steel
[T] = PTFE
COMMON PARTS
Item Description (size) Qty Part No. [Mtl] Item Description (size) Qty Part No. [Mtl]
1 Rod (1) 94358 [C]
6 Diaphragm Washer (2) 94357-2 [SS]
9 Washer (2) 93065 [SS]
14 Screw (5/8” - 18 x 2-1/2”) (2) Y5-111-T [SS]
15 Fluid Cap (2) 95570-1 [SS]
26 Screw (M10x1.5-6gx35mm) (8) 94409-2 [SS]
27 Screw (M10x1.5-6gx45mm) (16) 94990 [SS]
29 Nut (M10x1.5-6g) (16) 94992 [SS]
43 Ground Lug (1) 93004 [Co]
60 Inlet Manifold (1) 95508 [SS]
61 Outlet Manifold (1) 95509 [SS]
Ln70 Gasket (2) 94100 [B]
131 Screw (M10 x 1.5 - 6g x 120 mm) (4) 94531 [C]
Ln 144 “U” Cup (3/16” x 1-3/8” o.d.) (2) Y186-51 [B]
n 180 Washer (0.406” i.d. x 0.031” thick) (4) 94098 [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.
PM20X-X-X-B02Page 4 of 8
Page 5
PARTS LIST / PM20X-X-X-B02 FLUID SECTION
68
181
175 k
70 k
70 k
61
26 ,G
29
COLOR CODE
DIAPHRAGM BALL
MATERIAL COLOR COLOR
Santoprene Tan Tan
Santoprene Green N / A
(Backup)
PTFE White White
FOR THE
AIR MOTOR SECTION
SEE PAGES 6 & 7
69
5
1 k
3
5
7
2
1
8
6
4
Torque Sequence
7
6 14 ,9
22
21
19
z k
126
s
144 k
43
175 k
144 k
60
26 ,G
. TORQUE REQUIREMENTS ,
NOTE: DO NOT OVERTIGHTEN FASTENERS.
ALL FASTENERS ARE METRIC.
(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.
G Apply anti-seize compound to threads.
z Used with PM20X-CSS-SXX-B02 models only.
Z Lubriplate FML-2 is a white food grade petroleum grease.
180 131 ,
Figure 2
x
G.27
VIEW OF TWO PIECE PTFE DIAPHRAGM
(Santoprene) 87(PTFE)
15
22
21
19
z k
Page 5 of 8PM20X-X-X-B02
Page 6
P ARTS 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. [Mtl] Item Description (size) Qty Part No. [Mtl]
101 Center Body (PM20A-X-X -B02) (1) 94028 [A]
(PM20S-X-X -B02) (1) 94109 [SS]
103 Bushing (1) 94092 [D]
105 Screw (M6x1-6gx20mm) (4) 95887 [SS]
111 Spool (1) 95651 [D]
118 Actuator Pin (0.250” x 2.276” long) (2) 94083 [SS]
121 Sleeve (2) 94084 [D]
128 Set Screw (1/4” - 20 x 1/4”) (2) Y29-42-S [SS]
n 132 Gasket (1) 94099 [B]
133 Lockwasher (1/4”) (PM20A-X -X-B02) (3) Y117-416-C [C]
(PM20S-X-X -B02) (3) Y14-416-T [SS]
134 Screw (M6x1-6gx30mm) (4) 96358 [SS]
135 Valve Housing (PM20A-X-X-B02) (1) 96334-1 [A]
(PM20S-X-X -B02) (1) 96337-1 [SS]
136 Plug (PM20A-X -X-B02) (1) 96335 [A]
(PM20S-X-X -B02) (1) 96339 [SS]
n 137 “O” Ring (1/16” x 2” o.d.) (1) Y325-32 [B]
n 138 “U” Cup (3/16” x 1.792” o.d.) (1) 95966 [B]
n 139 “U” Cup (3/16” x 1-1/4” o.d.) (1) Y186-50 [B]
140 Valve Insert (1) 95650 [Ck]
141 Valve Plate (1) 95659 [Ck]
n 146 “O” Ring z (3/32” x 1-1/16” o.d.) (1) Y325-118 [B]
n 147 “O” Ring z (1/8” x 1/2” o.d.) (2) Y325-202 [B]
n 166 Track Gasket D (1) 94026 [B]
K Fluid Section Kit parts, see page 4.
n 167 Pilot Piston (includes 168 and 169) (1) 67164 [D]
168 “O” Ring (3/32” x 5/8” o.d.) (2) 94433 [U]
169 “U” Cup (1/8” x 7/8” o.d.) (1) Y240-9 [B]
170 Piston Sleeve (1) 94081 [Br]
n 171 “O” Ring (3/32” x 1-1/8” o.d.) (1) Y325-119 [B]
n 172 “O” Ring (1/16” x 1-1/8” o.d.) (1) Y325-22 [B]
n 173 “O” Ring (1/16” x 1-3/8” o.d.) (2) Y325-26 [B]
Kn 174 “O” Ring (1/8” x 1/2” o.d.) (2) Y325-202 [B]
n 176 Diaphragm (check valve) (2) 94102 [SP]
n 199 Track Gasket (1) 95666 [B]
n 200 Gasket (1) 95665 [B]
233 Adapter Plate (PM20A-X-X-B02) (1) 96336 [A]
(PM20S-X-X -B02) (1) 96338 [SS]
240 Screw (M6x1-6gx16mm) (2) 95991 [SS]
n 241 Track Gasket (1) 96344 [B]
n 242 “O” Ring (1/16” x 7/32” o.d.) (1) Y325-5 [B]
n 243 “O” Ring (1/8” x 5/8” o.d.) (1) Y325-204 [B]
n 244 “O” Ring (1/8” x 7/8” o.d.) (1) Y325-208 [B]
Ln Lubriplate FML-2 Grease (1) 94276
Lubriplate Grease Packets (10) 637308
z Used on models PM20S-CSS-XXX-B02 only.
D Used on models PM20A-CSS-XXX-B02 only.
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 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 -- Toaid in the installation of (168) “O” rings onto
the (167) pilot piston, use tool # 204130-T, available from ARO.
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.
PILOT VALVE REASSEMBLY
1. Clean and lubricate parts not being replaced from service kit.
2. Install new (171 and 172) “O” rings, replace (170) sleeve.
3. Install new (168) “O” rings and (169) seal - Note the lip direction. Lubricate and replace (167).
4. Reassemble remaining parts, replace (173 and 174) “O” rings.
MAJOR VALVE DISASSEMBLY
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)
valve plate, (199, 200 and 241) gaskets and (243 and 244) “O” rings.
3. Remove (136) plug and (137) “O” ring, releasing (111) spool.
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
and 244) “O” rings into (135) valve housing. NOTE: Assemble (140)
valve insert with “dished” side toward (141) valve plate. Assemble
(141) valve plate with part number identification tpward (140) valve
insert.
5. Assemble (200 and 241) gaskets and (233) adapter plate to (135)
valve housing, securing with (240) screws.
6. Assemble (132 and 166) gaskets and (176) checks to (101) center
body.
7. Assemble (135) valve housing and components to (101) center
body, securing with (134) screws.
PM20X-X-X-B02Page 6 of 8
Page 7
P ARTS LIST / PM20X-X-X-B02 AIR SECTION
135
133
140
199 k
121
k 174
k 173
167
118
169 k 172 k
168 k
171 k
PILOT VALVE
170
PART
243 k244 k
233
132 k
166 z k
GROUP
173 k
121
118
174 k
103
101
. 134
141 k
MAJOR
VALVE
. 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).
k Apply Lubriplate FML-2 grease to “O” rings, “U” Cups
= Apply Loctite 271 to threads at assembly.
LUBRICATION / SEALANTS
& mating parts.
138 k
111
139 k
137 k
242
128 =
136
105 ,
240 ,200 k 241 k 128 = 176 k
MATERIAL CODE
[A] = Aluminum
[B] = Nitrile
[Br] = Brass
[C] = Carbon Steel
[Ck] = Ceramic
[D] = Acetal
[I] = Iron
[SP] = Santoprene
[SS] = Stainless Steel
[U] = Polyurethane
Optional 94117 Muffler
Figure 3
z Substitute these “O” rings for
“166” gasket on models
PM20S
-CSS-XXX-B02.
147 k
146 k
A replacement Major Valve Service Assembly is available separately, which includes the following:
637374-2 for models PM20A
637374-4 for models PM20S
-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.
-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.
Page 7 of 8PM20X-X-X-B02
Page 8
TROUBLE SHOOTING
Product discharged from exhaust outlet.
S Check for diaphragm rupture.
S Check tightness of (14) diaphragm screw.
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.
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
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.
19-11/32” (491.3 mm)
Dotted lines show optional
67263 muffler assembly.
Dotted lines show optional
67213 muffler kit.
9-1/16”
(230.2 mm)
10-1/16”
(255.6 mm)
26-9/32”
(667.4 mm)
1-1/2 - 11-1/2 N.P.T.
Air Inlet
3/4 - 14 N.P.T.F. - 1
Exhaust Port
2-1/2” Tri-Clamp
Figure 4
OUTLET
INLET
9/16” Slot (14.3 mm)
10-1/16”
(255.6 mm)
24-3/4”
(628.7 mm)
13-9/16”
(344.5 mm)
2-1/2”
(63.5 mm)
PN 97999-1114
PM20X-X-X-B02Page 8 of 8
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