PF20X-X-X-B
OPERATOR’S MANUAL
RELEASED: 2-10-05
INCLUDING: OPERATION, INSTALLATION & MAINTENANCE
REVISED:
9-15-11
(REV. 04)
2” DIAPHRAGM PUMP
1:1 RATIO FLAP VALVE (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.
637310-XX for fluid section repair (see page 3).
637374-Xmajorairvalveassembly(seepage7).Note:Thiskitalsocon-
tains several replacement air motor seals.
637421 for air section repair (see page 6).
PUMP DATA
Models . . see Model Description Chart for “-XXX”.
Pump Type Metallic, Air Operated, Double Diaphragm, Flap Valve
Material . . see Model Description Chart.
Weight . . PF20A-XAX-SXX-B . . . . . . 97.3 lbs (44.2 kgs)
PF20A-XCX-SXX-B . . . . . . 166.2 lbs (75.4 kgs)
PF20A-ASX-SXX-B . . . . . . 166.0 lbs (75.3 kgs)
PF20A-BSX-SXX-B . . . . . . 166.0 lbs (75.3 kgs)
Figure 1
PF20A-FSX-SXX-B . . . . . . 177.1 lbs (80.3 kgs)
(add 28.9 lbs [13.1 kgs] for stainless steel air motor section)
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 . . . . . . . . . . . . 2” dia. (51 mm) semi-solids
Maximum Temperature Limits (diaphragm / flap / bumper material)
E.P.R. / EPDM . . . . . . . -60_to280_F (-51_to 138_C)
Nitrile . . . . . . . . . . . . . . 10_ to 180_ F (-12_ to 82_ C)
Polyurethane . . . . . . . . 10_ to 150_ F (-12_ to 66_ C)
SantopreneR . . . . . . . . -40_to225_F (-40_to 107_C)
PTFE . . . . . . . . . . . . . . 40_ to 225_ F (4_ to 107_ C)
VitonR . . . . . . . . . . . . -40_to350_F (-40_to 177_C)
Dimensional Data . . . . . . . . . . . . . . . . see page 8
MODEL DESCRIPTION CHART
PF20 X - X X X - S X X - B
CENTER SECTION MATERIAL
A - Aluminum
S - Stainless Steel
THREAD
A - N.P.T.F.
B - BSP
F - 2” A.N.S.I. / DIN Flange
FLUID CAPS & MANIFOLD MATERIAL
A - Aluminum
C - Cast Iron
S - Stainless Steel
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)|
HARDWARE MATERIAL
P - Plated Steel
S - Stainless Steel
{ Tested with 67263 muffler assembly installed.
| The pump sound pressure levels published here have been updated to an Equivalent Continuous
SEAT MATERIAL
S - Stainless Steel
Sound Level (L ) to meet the intent of ANSI S1.13-1971, CAGI-PNEUROP S5.1 using four mi-
Aeq
crophone locations.
FLAP MATERIAL
A - E.P.R.
G - Nitrile
U - Polyurethane
V - Viton
DIAPHRAGM MATERIAL
A - Santoprene
B - Santoprene
G - Nitrile
T - PTFE / Santoprene
V - Viton
FLUID SECTION SERVICE KIT SELECTION
PF20X - XXX - X X X - B
637310 - X X
EXAMPLE: MODEL # PF20A-AAP-SAA-B
FLUID SECTION SERVICE KIT # 637310-AA
Flap
Diaphragm
INGERSOLL RAND COMPANY
209 NORTH MAIN STREET- BRYAN, OHIO 43506
(800) 495-0276 D FAX (800) 892-6276
E2011
CCN 15227663
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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
theairchamberstoalternatelycreatesuctionandpositivefluidpressure
in the fluid chambers, flap 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.
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.
FLUID SECTION DISASSEMBLY
1. Remove (61) top manifold, (60) bottom manifold and (53) manifold
elbow.
AIR AND LUBE REQUIREMENTS
2. Remove the flap valve cartridge / seat assemblies.
3. Remove (15) fluid caps.
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.
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) diaphragm and (5) backup
washer.
NOTE: Do not scratch or mar the surface of (1) diaphragm rod.
FLUID SECTION REASSEMBLY
OPERATING INSTRUCTIONS
S Reassemble in reverse order. Refer to the torque requirements on
page 5.
S Always flush the pump with a solvent compatible with the material
beingpumpedifthematerialbeing pumpedissubjectto “settingup”
when not in use for a period of time.
S Clean and inspect all parts. Replace worn or damaged parts with
new parts as required.
S Disconnecttheairsupplyfromthepumpifitistobeinactiveforafew
hours.
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 Theoutletmaterialvolumeisgovernednotonlybytheairsupplybut
alsobythematerialsupplyavailableattheinlet.Thematerialsupply
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.
S Re-check torque settings after pump has been re-started and run a
while.
PARTS AND SERVICE KITS
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.
VitonR is trademark of the DuPont Company,
S
KynarR is a registered trademark of Penwalt Corp.
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)
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PF20X-X-X-B
Page 3 of 8
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PARTS LIST / PF20X-X-X-B FLUID SECTION
FLUID SECTION SERVICE KITS (637310-XX)
L KITS INCLUDE: DIAPHRAGMS (See Diaphragm Option, refer to -XX in chart below), Flap Valve items (47), (48), (51) and (55), plus items (44),
(46), (70), (75), (144) and (175) listed below, plus (174) and a (94276) Lubriplate FML-2 grease packet.
FLAP VALVE OPTIONS PF20X-XXX-SXX-B
L “47”
Qty [Mtl] Flap
L “48”
Qty [Mtl] Gasket
L “51”
Qty [Mtl] Gasket
L “55”
Qty [Mtl]
-XXX Bumper
-XAX 93197-5
-XGX 93197-2
-XUX 93197-5
-XVX 93197-3
(4)
(4)
(4)
(4)
[E] 93196-5
[B] 93196-2
[E] 93070
(4)
(4)
(4)
(4)
[E] 94365-1
[B] 94365-2
[U] 94365-1
[V] 94365-3
(4)
(4)
(4)
(4)
[E] 94364-1
[B] 94364-2
[E] 94364-1
[V] 94364-3
(4)
(4)
(4)
(4)
[E]
[B]
[E]
[V]
[V] 93196-3
DIAPHRAGM OPTIONS PF20X-XXX-SXX-B
L SERVICE KIT
-XX = (Flap Valve)
-XXX -XX = (Diaphragm) Diaphragm Qty [Mtl] Diaphragm Qty [Mtl]
L “7”
L “8”
-XXA 637310-XA
-XXB 637310-XB
-XXG 637310-XG
-XXT 637310-XT
-XXV 637310-XV
94329-A
94330-A
94329-G
94355-T
95344
(2) [SP] - - - - -
(2) [SP] - - - - -
- - -
- - -
- - -
(2) [SP]
- - - - - -
- - -
- - -
- - -
(2)
(2)
(2)
[B] - - - - -
[T] 94330-A
[V] - - - - -
CENTER SECTION - AIR CAP PART OPTIONS PF20X-XXX-SXX-B
MATERIAL CODE
[A] = Aluminum
[B] = Nitrile
[C] = Carbon Steel
[Co] = Copper
[CI] = Cast Iron
[E] = E.P.R.
[SP] =Santoprene
[SS] =Stainless Steel
[T] = PTFE
[U] = Polyurethane
[V] = Viton
PF20A-XXX-SXX-B
PF20S-XXX-SXX-B
Item
Description (size)
Backup Washer
68 Air Cap
69 Air Cap
126 Pipe Plug (1/4 - 18 N.P.T. x 7/16”)
Qty Part No. [Mtl] Part No.
[Mtl]
5
(2) 94357-1
(1) 94324-1
(1) 94324-2
(2) - - - - -
(2) Y325-117
(2) - - - - -
[A] 94357-2
[A] 94349-1
[A] 94349-2
- - - Y17-51-S
[B] - - - - -
[SS]
[SS]
[SS]
[SS]
- - -
L n 175 “O” Ring (3/32” x 1” o.d.)
L n
(3/32” x 1-1/16” o.d.)
- - - Y325-118
- - - Y178-56-S
[B]
[SS]
181 Roll Pin (5/32” o.d. x 3/4” long)
(4) - - - - -
MANIFOLD THREAD / FLUID CAP MATERIAL OPTIONS PF20X-XXX-SXX-B
PF20X-XAX-SXX-B
PF20X-XCX-SXX-B
PF20X-XSX-SXX-B
PF20X-FSX-SXX-B
Item Description (size)
Qty Part No. [Mtl] Part No.
[Mtl] Part No.
[Mtl] Part No.
[Mtl]
V 6 Diaphragm Washer
15 Fluid Cap
53 Manifold Elbow
60 Bottom Manifold
61 Top Manifold
(2) 94357-1
(2) 94331
(2) 94361
(1) 94327-[s]
(1) 94326-[s]
(2) Y17-128
(2) 94439-2
(2) Y227-2-L
[A] 94357-2
[A] 94359
[A] 94362
[A] 94347-[s]
[A] 94348-[s]
[A] Y17-28-C
[A] 94439-1
[C] Y227-2-L
[SS] 94357-2
[CI] 95560
[CI] 95563
[CI] 95510-[s]
[CI] 95511-[s]
[C] - - - - -
[SS] 94357-2
[SS] 95560
[SS] 95563
[SS] 95512 Y
[SS] 95513 Y
- - - - - - - -
[SS]
[SS]
[SS]
[SS]
[SS]
- - -
63 Pipe Plug (2 - 11-1/2 N.P.T.)
(R-2, 2 - 11 BSP)
[C] - - - - -
[C] Y17-50-S
- - - - - - - -
[SS] Y17-50-S
- - -
[SS]
80 Pipe Plug (1/8 - 27 N.P.T.F.)
s
For N.P.T.F. models (PF20X-AXX-SXX-B) use “-1”
s
For BSP models (PF20X-BXX-SXX-B) use “-2”
Y
Flange models
EXTERNAL HARDWARE OPTION PF20X-XXX-SXX-B
PF20X-XXP-SXX-B
PF20X-XXS-SXX-B
Item
Description (size)
Qty Part No.
[Mtl] Part No.
[Mtl]
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)
(20) 94409-1
(16) 94990-1
(16) 94992-1
[C] 94409-2
[C] 94990
[C] 94992
[SS]
[SS]
[SS]
COMMON PARTS
Item
V 1 Rod
Washer
14 Screw (5/8” - 18 x 2-1/2”)
43 Ground Lug
L 44 Screw
Description (size)
Qty Part No.
(1) 94358
(2) 93065
(2) Y5-111-T
(1) 93004
(8) 94408
(4) 93192
[Mtl]
[C]
Item
Description (size)
Qty Part No.
(4) 94366
(2) 94100
(4) 94620
(4) 94531
(2) Y186-51
(4) 94098
[Mtl]
[SS]
[B]
[SS]
[C]
49 Seat
9
[SS]
[SS]
[Co]
[SS]
[SS]
L n 70 Gasket
L 75 Plate
131 Screw (M10 x 1.5 - 6g x 120 mm)
Ln144 “U” Cup (3/16” x 1-3/8” o.d.)
n 180 Washer (0.406” i.d. x 0.031” thick)
[B]
L 46 Bracket
[Co]
V “Smart Parts” keep these items on hand in addition to the Service Kits for fast repair and reduction of down time.
n
Air Motor Kit Parts, see page 6.
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Page 4 of 8
PF20X-X-X-B
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PARTS LIST / PF20X-X-X-B FLUID SECTION
COLOR CODE
3
2
1
4
DIAPHRAGM
COLOR
FLAP
COLOR
BUMPER
COLOR
MATERIAL
5
7
8
6
E.P.R.
NITRILE
--
Blue (S)
Red (S)
Blue (S)
Red (S)
--
--
Black
SANTOPRENE Tan
SANTOPRENE Green
(Backup)
--
--
PTFE
URETHANE
VITON
White
--
--
Red
--
--
Yellow (--)
(--) Dash
Yellow (S)
(S) Dot
Yellow (S)
61 (PF20X-FSX-XXX-B)
61
26 , G
Torque Sequence
¡
FOR THE
AIR MOTOR SECTION
SEE PAGES 6 & 7
68 181
G . 44 75 46 47 48 49
175 k 70 k 144 k 70 k 29 1 k 69
5
7
6
9
14 ,
80 u 53
126 144 k
43
175 k
15
G . 27
180 131 , x
55
60
63
26 , G
60 (PF20X-FSX-XXX-B)
49 48 47 46 75 44 , G
51 26 , G
¡
Figure 2
¡ Cartridge Assembly available.
Includes items 44, 46, 47, 48, 49, 51, 75.
66307-A (PF20X-XXX-SAX-B)
66307-G (PF20X-XXX-SGX-B)
66307-U (PF20X-XXX-SUX-B)
66307-V (PF20X-XXX-SVX-B)
. TORQUE REQUIREMENTS ,
NOTE: DO NOT OVERTIGHTEN FASTENERS.
ALL FASTENERS ARE METRIC.
(14) Diaphragm screw, apply Loctite #271 to threads, torque to 65
- 70 ft lbs (88.1 - 94.9 Nm).
VIEW OF TWO PIECE PTFE DIAPHRAGM
(26 and 27) Fluid caps / manifold screws and (131) screw, 30 - 40
ft lbs (40.7 - 54.2 Nm).
8 (Santoprene)
(44) Screw, 50 - 60 in. lbs (5.6 - 6.8 Nm).
(131) Screw, 35 - 40 ft lbs (47.5 - 54.2 Nm).
7 (PTFE)
LUBRICATION / SEALANTS
k Apply Lubriplate FML-2 grease to all “O” rings, “U”
Cups & mating parts.
x Apply Loctite 242 to threads at assembly.
u Apply Loctite 503 pipe sealant.
G Apply anti-seize compound to threads when using
stainless steel fasteners and stainless steel wet ends.
Z Lubriplate FML-2 is a white food grade petroleum grease.
(en)
PF20X-X-X-B
Page 5 of 8
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PARTS LIST / PF20X-X-X-B 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
(1) 94860
(2) Y29-42-S
(1) 94099
(3) Y117-416-C
(3) Y14-416-T
(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
[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) 94810
(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]
101 Center Body (PF20A-X-X-B)
(PF20S-X-X-B)
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]
[C / I]
[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
~ 127 90 St. Elbow (1-1/2 - 11-1/2 N.P.T.)
128 Set Screw (1/4” - 20 x 1/4”)
n 132 Gasket
133 Lockwasher (1/4”) (PF20A-X-X-B)
(PF20S-X-X-B)
[C]
n 200 Gasket
[B]
[SS]
[SS]
[A]
[SS]
[A]
[SS]
[B]
[B]
~ 201 Muffler
134 Screw (M6 x 1 - 6g x 30 mm)
135 Valve Housing (PF20A-X-X-B)
(PF20S-X-X-B)
233 Adapter Plate (PF20A-X-X-B)
(PF20S-X-X-B)
[A]
[SS]
[SS]
[B]
[B]
[B]
240 Screw (M6 x 1 - 6g x 16 mm)
n 241 Track Gasket
136 Plug (PF20A-X-X-B)
(PF20S-X-X-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]
[B]
[Ck]
[Ck]
[B]
[B]
[B]
L n Lubriplate FML-2 Grease
(1) 94276
637308
141 Valve Plate
Lubriplate Grease Packets (10)
n 146 “O” Ring D (3/32” x 1-1/16” o.d.)
n 147 “O” Ring D (1/8” x 1/2” o.d.)
D
Used on models PF20S-XXX-SXX-B only.
z Used on models PF20A-XXX-SXX-B only.
Items not shown
n 166 Track Gasket z
~
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 toward (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.
(en)
PF20X-X-X-B
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PARTS LIST / PF20X-X-X-B 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
PF20S-XXX-XXX-B.
. TORQUE REQUIREMENTS ,
NOTE: DO NOT OVERTIGHTEN FASTENERS.
ALL FASTENERS ARE METRIC.
Torque (105) Screw to 35 - 40 in. lbs (4.0 - 4.5 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 PF20A-XXX-SXX-B: 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 PF20S-XXX-SXX-B: 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.
(en)
PF20X-X-X-B
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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 gaskets 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).
P
E
l
(PF20X-AXX-XXX-B) 2 - 11-1/2 N.P.T.F. - 1
F
(PF20X-BXX-XXX-B) Rp 2 (2 - 11 BSP parallel)
L
L
Inlet
B
N Bolt Circle
G
Q
R
B
D
D
Outlet
Dotted lines show optional
67263 muffler assembly.
K
H
M
C
J
2” A.N.S.I. / DIN Flange
(PF20X-FXX-XXX-B)
Air Inlet 3/4 - 14 N.P.T.F. - 1
A
Exhaust port 1-1/2 - 11-1/2 N.P.T.
DIMENSIONS
A -- 23-3/16” (588.8 mm)
B -- 24-3/4” (628.7 mm)
C -- 10-1/16” (255.6 mm)
D -- see below
E -- 16-3/16” (411.2 mm)
F -- 12” (304.8 mm)
G -- 26-1/4” (666.8 mm)
H -- 9-1/16” (230.2 mm)
J -- 10-1/16” (255.6 mm)
N -- 4.834” (122.8 mm)
P -- 21-5/8” (548 mm)
Q -- 27-7/8” (708.0 mm)
R -- see below
l Side Discharge Ports are
not available on
PX20X-XSX-X-B Models.
K -- 9/16” (14.3 mm)
L -- see below
M -- 5/8” (15.9 mm)
“D”
“L”
“R”
PF20X-XAX-SXX-B
PF20X-XCX-SXX-B
PF20X-ASX-SXX-B
PF20X-BSX-SXX-B
PF20X-FSX-SXX-B
1-7/8” (47.6 mm)
1-7/8” (47.6 mm)
2-1/2” (63.5 mm)
2-1/2” (63.5 mm)
2-1/2” (63.5 mm)
2” (50.8 mm)
2” (50.8 mm)
12-19/32” (319.9 mm)
12-19/32” (319.9 mm)
13-1/4” (336.6 mm)
13-1/4” (336.6 mm)
13-1/4” (336.6 mm)
2-3/32” (53.0 mm)
2-3/32” (53.0 mm)
3-1/4” (82.6 mm)
Figure 4
PN 97999-1112
(en)
PF20X-X-X-B
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