PD20P-X-X
OPERATOR’S MANUAL
INCLUDING: OPERATION, INSTALLATION & MAINTENANCE
PE20P-X-X
RELEASED: 12-16-02
REVISED:
(REV. K)
10-9-10
2” DIAPHRAGM PUMP
1:1 RATIO (NON-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.
637369 for air section repair (see page 6).
637373-XXforfluidsectionrepair(seepage4).NOTE:Thiskitalsocon-
tains several air motor seals which will need to be replaced.
637374-X major air valve assembly (see page 7).
PUMP DATA
Models . . . . . . . . . . see Model Description Chart for “-XXX”.
Pump Type . . . . . . . Non-MetallicAir Operated DoubleDiaphragm
Material . . . . . . . . . . see Model Description Chart.
Weight . . . PX20P-FKS-XXX . . . . . . . 110.9 lbs (50.3 kgs)
PX20P-FPS-XXX . . . . . . . 85.3 lbs (38.7 kgs)
Maximum Air Inlet Pressure . . . . . . . . . 120 p.s.i.g. (8.3 bar)
Maximum Material Inlet Pressure . . . . . 10 p.s.i.g. (.69 bar)
Maximum Outlet Pressure . . . . . . . . . . 120 p.s.i.g. (8.3 bar)
Maximum Flow Rate (flooded inlet) . . . . 184 g.p.m. (696 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. / EPDM . . . . . . . . . . . -60_to280_F (-51_to 138_C)
HytrelR . . . . . . . . . . . . . . . -20_ to 150_ F (-29_ to 66_ C)
Nitrile . . . . . . . . . . . . . . . . . 10_ to 180_ F (-12_ to 82_ C)
Figure 1
MODEL DESCRIPTION CHART
P X 20 P - F X S - X X X
Electronic Interface
D - None
Polypropylene
. . . . . . . . . . .35_ to 175_ F (2_ to 79_ C)
E - Available
KynarR PVDF . . . . . . . . . . . 10_ to 200_ F (-12_ to 93_ C)
SantopreneR . . . . . . . . . . . -40_to225_F (-40_to 107_C)
PTFE . . . . . . . . . . . . . . . . . 40_ to 225_ F (4_ to 107_ C)
VitonR . . . . . . . . . . . . . . . . -40_to350_F (-40_to 170_C)
Dimensional Data . . . . . . . . . . . . . . . . see page 8
Mounting Dimension . . . . . 8.18” x 14.16” (207.8 mm x 359.7 mm)
Noise Level @ 70 p.s.i., 60 c.p.m. . . . . . 85.0 db(A){
Center Section Material
P - Polypropylene / Vinyl Ester
Fluid Connection
F - 2” A.N.S.I. / DIN Flange
Fluid Caps & Manifold Material
P - Polypropylene
K - Kynar PVDF
The pump sound pressure levels published here have been updated to an Equivalent
Hardware Material
S - Stainless Steel
Continuous Sound Level (L ) to meet the intent of ANSI S1.13-1971, CAGI-PNEU-
Aeq
ROP S5.1 using four microphone locations.
Seat Material
P - Polypropylene
K - Kynar PVDF
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.
Ball Material
A - Santoprene
C - Hytrel
G - Nitrile
T - PTFE
V - Viton
Diaphragm Material
A - Santoprene
C - Hytrel
M - Medical Grade Santoprene
T - PTFE / Santoprene
V - Viton
G - Nitrile
FLUID SECTION SERVICE KIT SELECTION
PX20P - FXS - X X X
637373 - X X
EXAMPLE: Model # PD20P-FPS-PAA
Fluid Section Service Kit # 637373-AA
Ball
Diaphragm
INGERSOLL RAND COMPANY LTD
209 NORTH MAIN STREET BRYAN, OHIO 43506
(800) 276-4658 D FAX (800) 266-7016
E2010
CCN 20083440
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 Section
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 Iflubricatedairispresent,makesurethatitiscompatiblewiththe“O”
rings and seals in the air motor section of the pump.
FLUID SECTION DISASSEMBLY
1. Remove (61) outlet manifold, (60) inlet manifold.
2. Remove (22) balls, (19 and 33) “O” rings and (21) seats.
3. Remove (15) fluid caps.
INSTALLATION
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 Verify correct model / configuration prior to installation.
S Retorque all external fasteners per specifications prior to start up.
S Pumpsaretestedinwateratassembly. Flushpumpwithcompatible
fluid prior to installation.
4. Removethe(6)diaphragmwasher,(7)or(7/8)diaphragms,and(5)
backup washer.
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.
NOTE: Do not scratch or mar the surface of (1) diaphragm rod.
S Material supply tubing should be at least the same diameter as the
pump inlet manifold connection.
FLUID SECTION REASSEMBLY
S Material supply hose must be reinforced, non-collapsible type com-
patible with the material being pumped.
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 Piping must be adequately supported. Do not use the pump to sup-
port the piping.
S Use flexible connections (such as hose) at the suction and dis-
charge. These connections should not be rigid piped and must be
compatible with the material being pumped.
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 Secure the diaphragm pump legs to a suitable surface (level and
flat) to insure against damage by vibration.
S Pumpsthatneed to be submersed must havebothwetandnon-wet
components compatible with the material being pumped.
S Submersed pumps must have exhaust pipe above liquid level. Ex-
haust hose must be conductive and grounded.
S Re-check torque settings after pump has been re-started and run a
while.
S Flooded suction inlet pressure must not exceed 10 p.s.i.g. (0.69
bar).
OPERATING INSTRUCTIONS
S Always flush the pump with a solvent compatible with the material
beingpumpedifthematerialbeingpumpedissubjectto“settingup”
when not in use for a period of time.
S Disconnecttheairsupplyfromthepumpifitistobeinactiveforafew
hours.
S VitonR and HytrelR are registered trademarks of the DuPont Company S KynarR is a registered trademark of Arkema Inc. S LoctiteR is a registered trademark of Henkel Loctite Corporation S
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 Refining Company) S
PD20P-X-X (en)
Page 3 of 8
PARTS LIST / PX20P-X-X FLUID SECTION
L 637373-XX Fluid Section Service Kits include: Balls (see Ball Option, refer to -XX in Service Kit chart below), Diaphragms (see Diaphragm Option, refer to
-XX in Service Kit chart below), and items 19, 33, 70, 144, 175, 237 and 238 (listed below) plus 174 and 94276 Lubriplate FML-2 grease (page 6).
SEAT OPTIONS
PX20P-FXS-XXX
“21”
BALL OPTIONS
PX20P-FXS-XXX
L “22” (2-1/2” dia.)
MATERIAL CODE
[B] = Nitrile
[C] = Carbon Steel
[Co] = Copper
[E] = E.P.R.
[H] = Hytrel
-XXX Seat
Qty [Mtl]
-XXX Ball
Qty [Mtl]
[K] = Kynar PVDF
[MSP]= Medical Grade Santoprene
[P] = Polypropylene
[SP] = Santoprene
[SS] = Stainless Steel
[T] = PTFE
-KXX 95847-2
-PXX 95847-1
(4)
(4)
[K]
[P]
-XAX 93358-A
-XCX 93358-C
-XGX 93358-2
-XTX 93358-4
-XVX 93358-3
(4) [SP]
(4)
(4)
(4)
(4)
[H]
[B]
[T]
[V]
[V] = Viton
[VE] = Vinyl Ester
DIAPHRAGM OPTIONS PX20P-FXS-XXX
L SERVICE KIT
L “7”
L “8”
L “19”
L “33”
-XX = (Ball)
“O” Ring
“O” Ring
Qty [Mtl] (3/16” x 5” o.d.)
-XXX -XX = (Diaphragm) Diaphragm Qty [Mtl] Diaphragm Qty [Mtl] (3/16” x 4” o.d.)
Qty [Mtl]
-XXA 637373-XA
-XXC 637373-XC
-XXG 637373-XG
-XXM 637373-XM
-XXT 637373-XT
-XXV 637373-XV
94329-A
94329-C
94329-G
94329-M
95930
(2)
(2)
(2)
[SP] - - - - -
- - -
- - -
- - -
- - -
- - - 95912
(4)
(4)
(4)
(4)
(4)
(4)
[E] 94115
(4)
(4)
(4)
(4)
(4)
(4)
[E]
[V]
[B]
[E]
[T]
[V]
[H]
[B]
- - - - -
- - - - -
- - - Y327-342
- - - Y325-342
- - - 95912
[V] Y327-350
[B] Y325-350
[E] 94115
(2) [MSP] - - - - -
(2)
(2)
[T]
[V]
94330-A
- - - - -
(2) [SP] 95910
- - - - - - Y327-342
[T] 95909
95344
[V] Y327-350
MANIFOLD / FLUID CAP MATERIAL OPTIONS PX20P-FXS-XXX
Kynar PVDF
Polypropylene
PX20P-FKS-XXX PX20P-FPS-XXX
Item Description (size)
Diaphragm Screw
Qty Part No.
(2) 95858-2
(2) 95855-2
(1) 95857-2
(1) 95856-2
[Mtl] Part No.
[K] 95858-1
[K] 95855-1
[K] 95857-1
[K] 95856-1
[Mtl]
[P]
6
15 Fluid Cap
[P]
60 Inlet Manifold
61 Outlet Manifold
[P]
[P]
COMMON PARTS
Item
Description (size)
Qty Part No.
[Mtl]
Item
Description (size)
Qty Part No.
(2) Y17-51-S
(6) 95920
[Mtl]
= 126 Pipe Plug (1/4 - 18 N.P.T. x 0.41”)
131 Screw (M10 x 1.5 - 6g x 134 mm)
Ln144 “U” Cup (3/16” x 1-3/8” o.d.)
Ln175 “O” Ring (3/32” x 1” o.d.)
n 180 Washer (0.406” i.d. x 0.031” thick)
181 Roll Pin (5/32” o.d. x 3/4” long)
234 Threaded Tri-Plate
[SS]
[SS]
[B]
1
5
Rod
Backup Washer
(1) 94358
(2) 94357-2
(16) 95925
(28) 95922
(44) 93360-1
(28) 94992
(1) 95762-1
(1) 95762-3
(1) 95762-2
(1) 95762-4
(2) 94100
[C]
[SS]
[SS]
[SS]
[SS]
[SS]
[VE]
[VE]
[VE]
[VE]
[B]
26 Screw (M10 x 1.5 - 6g x 45 mm)
27 Screw (M10 x 1.5 - 6g x 100 mm)
28 Washer (0.406” i.d.)
29 Nut (M10 x 1.5 - 6g)
(2) Y186-51
(2) Y325-117
(6) 94098
[B]
[Co]
(4) Y178-56-S [SS]
68 Air Cap (models PD20P-X)
(models PE20P-X)
(2) 95737
(2) 95736
(4) 95849
(4) Y325-111
[SS]
[SS]
[B]
235 Tri-Plate (inside item 68)
Ln237 Track Gasket
69 Air Cap (models PD20P-X)
(models PE20P-X)
Ln238 “O” Ring (3/32” x 5/8” o.d.)
239 Roll Pin (5/32” o.d. x 1/2” long)
[B]
L n 70 Gasket
(2) Y178-52-S [SS]
= 76 Pipe Plug (1/8 - 27 N.P.T. x 0.27”)
(1) Y17-50-S
[SS]
n Indicates items included in Air Section Service Kit, see page 6.
= Used on models PE20P-FXS-XXX only.
Page 4 of 8
PD20P-X-X (en)
PARTS LIST / PX20P-X-X FLUID SECTION
AUXILIARY VIEW A-A
COLOR CODE
3
2
1
4
DIAPHRAGM
COLOR
BALL
COLOR
MATERIAL
5
7
8
6
Hytrel
Nitrile
Cream
Black
Tan
Cream
Red (S)
Tan
180
12
14
10
9
Santoprene
Santoprene
(Backup)
PTFE
Green
N / A
235
13
11
White
Yellow (-)
(-) Dash
White
Yellow (S)
(S) Dot
Viton
k 237
61
Torque Sequence
26 , z
28
FOR THE
AIR MOTOR SECTION
SEE PAGES 6 & 7
181
70 k
238 k
68
A
175 k
144 k 70 k 29 69
239
5
76 s
7
22
19
21
33
27 ,z
A
28
126 s
131 ,x 144 k 238 k 175 k
1 k 237 k
234
15
28
6 , h
22
19
21
33
26 , z
60
. TORQUE REQUIREMENTS ,
NOTE: DO NOT OVERTIGHTEN FASTENERS.
ALL FASTENERS ARE METRIC.
Figure 2
View for PX20P-XXX-XXT (PTFE diaphragm)
configuration only.
(6) Diaphragm screw, 65 - 70 ft lbs (88.1 - 94.9 Nm), lubricate face with Lubri-
plate FML-2 grease.
(26 and 27) Screws, 15 - 20 ft lbs (20.3 - 27.1 Nm).
(131) Screw, 12 - 17 ft lbs (16.3 - 23.0 Nm).
LUBRICATION / SEALANTS
k
h
x
s
z
Apply Lubriplate FML-2 grease to all “O” rings, “U” cups & mating parts.
Apply Loctite 271 to threads at assembly.
Apply Loctite 242 to threads at assembly.
Apply PTFE tape to threads at assembly.
Apply anti-seize compound to threads and bolt and nut flange heads
which contact pump case when using stainless steel fasteners.
Santoprene 8
7 PTFE
NOTE: Lubriplate FML-2 is a white food grade petroleum grease.
PD20P-X-X (en)
Page 5 of 8
PARTS LIST / PX20P-X-X AIR SECTION
n Indicates parts included in 637369 Air Section Service Kit shown below and items (70), (144), (175), (180), (237) and (238) shown on page 4.
AIR MOTOR PARTS
Item
Description (size)
Qty Part No.
(1) 95667
(1) 94092
(4) 95921
(2) 95846
(1) 95651
(2) 94083
(2) 94084
(1) 94860
(1) 94099
(8) 95931
(8) 95923
(1) 95789
(1) 95789-1
(1) 95790
(1) Y325-32
(1) 95966
(1) Y186-50
(1) 95650
(1) 95659
(1) Y325-208
(1) Y325-204
(1) 94026
[Mtl]
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) 67213
(2) Y325-202
(1) 95761
(4) 95924
(1) 94276
637308
[Mtl]
[D]
101 Center Body
[P]
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
103 Bushing
[D]
[U]
105 Screw (M6 x 1 - 6g x 180 mm)
107 End Plate
[SS]
[SS]
[D]
[B]
[Br]
[B]
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
[SS]
[D]
[B]
[B]
127 90_ St. Elbow (1-1/2 - 11-1/2 N.P.T.)
n 132 Gasket
[C / I]
[B]
[B]
[SP]
[B]
133 Washer (M6)
[SS]
[SS]
[P]
134 Screw (M6 x 1 - 6g x 35 mm)
135 Valve Block (PD20P-FXS-XXX)
(PE20P-FXS-XXX)
n 200 Gasket
[B]
201 Muffler (includes item 127)
n 232 “O” Ring (1/8” x 1/2” o.d.)
233 Adapter Plate
[P]
[B]
[P]
136 End Cap
[P]
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]
236 Nut (M6 x 1 - 6g)
[SS]
[B]
L n Lubriplate FML-2 Grease
Lubriplate Grease Packets (10)
[B]
[Ck]
[Ck]
[B]
141 Valve Plate
MATERIAL CODE
[B] = Nitrile
[Br] = Brass
[C] = Carbon Steel
[Ck] = Ceramic
[D] = Acetal
[SP] = Santoprene
[SS] = Stainless Steel
[U] = Polyurethane
n 146 “O” Ring (1/8” x 7/8” o.d.)
n 147 “O” Ring (1/8” x 5/8” o.d.)
n 166 Track Gasket
[I] = Iron
[B]
[P] = Polypropylene
[B]
K
Indicates items included in Fluid Section Service Kit, 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 (132
and 166) gaskets, (232) “O” ring and (176) checks.
2. Remove (233) adapter plate, releasing (140) valve insert, (141)
valveplate,(199and200)gasketsand(146,147and232)“O”rings.
3. Remove (136) end cap 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 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 block.
3. Install (137) “O” ring on (136) end cap and assemble end cap to
(135) valve block, securing with (107) end plates and (105) screws.
4. Install(140)valveinsertand(141)valveplateinto(135)valveblock.
NOTE: Assemble (140) valve insert with “dished” side toward (141)
valve plate. Assemble (141) valve plate with 2 identification dots to-
ward (199 and 200) gaskets.
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 (146, 147 and 232) “O” rings, (199 and 200) gaskets and
(233) adapter plate to (135) valve block.
6. Assemble(132and166)gaskets,(176)checksand(232)“O”ringto
(101) body.
PILOT VALVE REASSEMBLY
7. Assemble (135) valve block and components to (101) body, secur-
ing with (134) screws.
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 the lip direction. Lu-
bricate and replace (167).
4. Reassemble remaining parts, replace (173 and 174) “O” rings.
Page 6 of 8
PD20P-X-X (en)
PARTS LIST / PX20P-X-X AIR SECTION
118
169 k 168 k
172 k
171 k
121
PILOT VALVE
PART GROUP
k 174
170
k 173
167
140
141 k 199 k 146 k 147 k 132 k 166 k
173 k
121
107
118
. 105
174 k
103
101
135
133
Optional 94117 Muffler
. 134
138 k 200 k 232 k 233 232 k 176 k
111
MAJOR
VALVE
139 k
201
137 k
127
136
107
236
Figure 3
. TORQUE REQUIREMENTS ,
NOTE: DO NOT OVERTIGHTEN FASTENERS.
ALL FASTENERS ARE METRIC.
Torque (105) screw to 15 - 20 in. lbs (1.7 - 2.3 Nm).
Torque (134) screw to 40 - 50 in. lbs (4.5 - 5.6 Nm).
LUBRICATION / SEALANTS
Apply Lubriplate FML-2 grease to “O” rings, “U” cups & mating parts.
k
A replacement Major Valve Service Assembly is available separately, which includes the following:
637374 for models PD20P-X: 105 (4), 107 (2), 111, 132, 135, 136, 137, 138, 139, 140, 141, 146, 147, 166, 176 (2), 199, 200, 232 (2), 233 and 236 (4).
637374-1 for models PE20P-X: 76, 105 (4), 107 (2), 111, 132, 135, 136, 137, 138, 139, 140, 141, 146, 147, 166, 176 (2), 199, 200, 232 (2), 233 and 236 (4).
PD20P-X-X (en)
Page 7 of 8
TROUBLE SHOOTING
Product discharged from exhaust outlet.
S Check for diaphragm rupture.
S Check tightness of (6) 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 (6) diaphragm screw.
Motor blows air or stalls.
S Check (176) check valve for damage or wear.
S Check for restrictions in valve / exhaust.
S Inspectthepumpforsolidobjectslodgedinthediaphragmchamber
or the seat area.
DIMENSIONAL DATA
(Dimensions shown are for reference only, they are displayed in inches and millimeters (mm).
22-1/4” (564.9 mm)
20-31/32” (532.2 mm)
C
L
2” A.N.S.I. / DIN Flange
10-7/8”
13-7/8” (352.0 mm)
Air Inlet 3/4 - 14 N.P.T.
(276.2 mm)
Outlet
31-29/32”
(810.5 mm)
28-21/32”
(728.0 mm)
16”
(405.9 mm)
Dotted lines show optional
67323 muffler.
Inlet
3-5/8”
(92.2 mm)
9/16” (14.3 mm)
8-3/16”
1/2” (12.7 mm)
(207.8 mm)
6-1/4”
14-5/32” (360.0 mm)
9-7/32”
(158.3 mm)
(234.2 mm)
24-3/16” (614.3 mm)
2” A.N.S.I. / DIN Flange
Exhaust Port 1-1/2 - 11-1/2 N.P.S.M.
Figure 4
PN 97999-1026
PD20P-X-X (en)
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