PSG Wilden P4 Series, Wilden P8 Series Engineering, Operation & Maintenance

EOM

Engineering

Operation &

Maintenance

P4 Metal Pump

Where Innovation Flows

wildenpump.com

TABLE OF CONTENTS

SECTION 1 CAUTIONS—READ FIRST! ..............................................1

SECTION 2 WILDEN PUMP DESIGNATION SYSTEM .................................2

SECTION 3 HOW IT WORKS—PUMP & AIR DISTRIBUTION SYSTEM ................3

SECTION 4 DIMENSIONAL DRAWINGS .............................................4

SECTION 5 PERFORMANCE

P4 Metal Rubber-Fitted .....................................................5

P4 Metal TPE-Fitted ........................................................5

P4 Metal Reduced-Stroke PTFE-Fitted. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

P4 Metal Full-Stroke PTFE-Fitted .............................................6

P4 Metal Ultra-Flex™-Fitted .................................................7

Suction-Lift Curves ........................................................8

SECTION 6 SUGGESTED INSTALLATION, OPERATION & TROUBLESHOOTING ........9

SECTION 7 DISASSEMBLY/REASSEMBLY ..........................................12

SECTION 8 EXPLODED VIEW & PARTS LISTING

P4 Metal Full-Stroke Diaphragm-Fitted .......................................20

P4 Metal Reduced-Stroke Diaphragm-Fitted ..................................22

P4 Metal Saniflo™ 1935/2004/EC ............................................24

SECTION 9 ELASTOMER OPTIONS .................................................32

Section 1

CAUTIONS—READ FIRST!

CAUTION: Do not apply compressed air to the

exhaust port — pump will not function.

CAUTION: Do not over-lubricate air supply —

excess lubrication will reduce pump performance.
Pump is pre-lubricated.

TEMPERATURE LIMITS:

Acetal –29°C to 82°C –20°F to 180°F
Buna-N –12°C to 82°C 10°F to 180°F
Geolast® –40°C to 82°C –40°F to 180°F
Neoprene –18°C to 93°C 0°F to 200°F
Nordel® EPDM –51°C to 138°C –60°F to 280°F
Nylon –18°C to 93°C 0°F to 200°F
PFA –7°C to 107°C 45°F to 225°F
Polypropylene 0°C to 79°C 32°F to 175°F
Polyurethane –12°C to 66°C 10°F to 150°F
PVDF –12°C to 107°C 10°F to 225°F
Saniflex™ –29°C to 104°C –20°F to 220°F

SIPD PTFE
SIPD PTFE

with

EPDM-backed 4°C to 137°C 40°F to 280°F

with

Neoprene-backed

4°C to 93°C 40°F to 200°F
PTFE1 4°C to 104°C 40°F to 220°F
FKM –40°C to 177°C –40°F to 350°F
Wil-Flex™ –40°C to 107°C –40°F to 225°F

1

4°C to 149°C (40°F to 300°F) - 13 mm (1/2") and 25 mm (1") models only.

NOTE: Not all materials are available for all models.

Refer to Section 2 for material options for your
pump.

CAUTION: When choosing pump materials, be

sure to check the temperature limits for all wetted
components. Example: FKM has a maximum limit
of 177°C (350°F), but polypropylene has a maximum
limit of only 79°C (175°F).

CAUTION: Maximum temperature limits are based

upon mechanical stress only. Certain chemicals
will significantly reduce maximum safe operating
temperatures. Consult Chemical Resistance Guide
for chemical compatibility and temperature limits.

WARNING: Prevent static sparking. If static

sparking occurs, fire or explosion could result.
Pump, valves and containers must be grounded to a
proper grounding point when handling flammable
fluids and whenever discharge of static electricity
is a hazard.

CAUTION: The process fluid and cleaning fluids

must be chemically compatible with all wetted
pump components. Consult Chemical Resistance
Guide.

CAUTION: Pumps should be thoroughly flushed

before installing into process lines. FDA- and
USDA-approved pumps should be cleaned and/or
sanitized before being used.

CAUTION: Always wear safety glasses when

operating pump. If diaphragm rupture occurs,
material being pumped may be forced out air
exhaust.

CAUTION: Before any maintenance or repair is

attempted, the compressed air line to the pump
should be disconnected and all air pressure
allowed to bleed from pump. Disconnect all intake,
discharge and air lines. Drain the pump by turning
it upside down and allowing any fluid to flow into a
suitable container.

CAUTION: Blow out air line for 10 to 20 seconds

before attaching to pump to make sure all pipeline
debris is clear. Use an in-line air filter. A 5μ (micron)
air filter is recommended.

NOTE: When installing PTFE diaphragms, it is

important to tighten outer pistons simultaneously
(turning in opposite directions) to ensure tight fit.
(See torque specifications in Section 7.)

NOTE: Cast Iron PTFE-fitted pumps come standard

from the factor y with expanded PTFE gaskets
installed in the diaphragm bead of the liquid
chamber. PTFE gaskets cannot be re-used.

NOTE: Before starting disassembly, mark a line

from each liquid chamber to its corresponding air
chamber. This line will assist in proper alignment
during reassembly.

CAUTION: Pro-Flo® pumps cannot be used in

submersible applications.

CAUTION : Tighten all hardware prior to installation.

CAUTION: Do not exceed 8.6 bar (125 psig) air

supply pressure.

WI L-1018 3- E-03 1 WILDEN PUMP & ENGINEERING, LLC

Section 2

WILDEN PUMP DESIGNATION SYSTEM

P4 METAL

38 mm (1-1/2") Pump
Maximum Flow Rate:
348 lpm (92 gpm)

LEGEND

MATERIAL CODES

MODEL

P4 = PRO-FLO

WETTED PARTS & OUTER PISTON

AA = ALUMINUM / ALUMINUM
AZ = ALUMINUM /
NO OUT ER PISTON
SS = STAINLESS STEEL /
STAINLESS STEEL
SZ = STAINLESS STEEL /
NO OUT ER PISTON
WW = CAST IRON / CAST IRON
WM = CAST IRON / MILD STEEL
WZ = DUCTIL E IRON /
NO OUT ER PISTON

AIR CHAMBERS/CENTER
SECTION

A = ALUMINUM
C = PFA-COAT ED
L = ACE TAL (P4 only)
N = NICKEL-PLATED
S = STAINLESS STEEL
V = HAL AR®-COATED

CENTER SECTION/BLOCK

L = ACETAL
N = NICKEL-PLATED
P = POLYPROP YLENE

AIR VALVE

L = ACETAL
P = POLYPROP YLENE

NOTE:

1

Meets Requirements of FDA CFR21.177

2

Meets Requirements of USP Class VI

3

Meets Requirements of 1935/2004/EC

®

P4 / XXXXX / XXX / XX /X XX/ XXXX

MODEL

DIAPHRAGMS

VALVE BALLS

AIR VALVE

CENTER BLOCK

AIR CHAMBERS

WETTED PARTS & OUTER PISTON

DIAPHRAGMS

BNS = BUNA-N (Red Dot)
BNU = BUNA-N, ULTRA-FLEX
(Red Dot)
EPS = EPDM (Blue Dot)
EPU = EPDM, ULTRA-FLEX
(Blue Dot)
FBS = SANITARY BUNA (Two

Yellow Dots)

FES = SANITARY EPDM (Two

Blue Dots)
FSS = SANIFLEX
[Hytrel® (Cream)]

1,3

1,3

TM

TM

1,3

1,3

1,3

FWL = FULL-STROKE SANITARY

WIL-FLEX™, IPD1

[Santoprene® (Two Black

Dots)]
FWS = SANITARY WIL-FLEX™,

EZ-INSTALL [Santoprene®

(Two Black Dots)]

1,3

NES = NEOPRENE (Green Dot)
NEU = NEOPRENE, ULTRA-FLEX
(Green Dot)
PUS = POLYURETHANE (Clear)
TEU = PTFE W/EPDM
BACKUP (White)

1,2,3

TNU = PTFE W/NEOPRENE
BACKUP (White)
TSS = FULL-STROKE PTFE
W/SANIFLEX™
TSU = PTFE W/SANIFLEX
BACKUP (White)

BACKUP

TM

1,2,3

TWS = FULL-STROKE PTFE

W/WIL-FLEX™
VTS = FKM (White Dot)
VTU = FKM, ULTRA-FLEX

BACKUP

TM

(White Dot)

O-RINGS

VALVE SEATS

WFS = WIL-FLEX
(Three Black Dots)]

TM

XBS = CONDUCTIVE BUNA-N
(Two Red Dots)

VALVE BALLS

BN = BUNA-N (Red Dot)
EP = EPDM (Blue Dot)
FS =

SANIFLE X ™ [Hytrel®

(Cream)]
NE = NEOPRENE (Green Dot)
PU = POLYURETHA NE (Clear)
TF = PTFE (White )
VT = F KM (Silver

or White Dot)
WF = WIL-FLEX™ [ Santoprene

(Three Black Dots) ]

VALVE SE ATS

A = ALUMINUM
BN = BUNA-N (Red Dot)

TM

FS =

SANIFLE X ™ [Hytrel®

(Cream)]
H = ALLOY C
M = MIL D STEEL
EP = EPDM (Blue Dot)
NE = NEOPRENE (Green Dot)
PU = POLYURETHA NE (Clear)
S = STAINLESS STEEL

1,2,3

VT = FKM (Silver or White Dot)
WF = WIL-FLEX™ ( Santoprene®)

VALVE SEAT O-RINGS

1,2,3

TF = PTF E

SPECIALTY
CODE

(if applicable)

TM

1,3

1,3

1,2,3

[Santoprene

1,2,3

®

SPECIALTY CODES

0014 BSP
0023 Wing nuts
0030 Screen based
0036 Screen based, BSP
0044 Stallion, balls & seats ONLY
0047 Stallion externals, balls and seats
0067 Saniflo FDA, Wil-Gard 220V
0070 Saniflo FDA
0075 Saniflo FDA, Stallion balls and seats

NOTE: MOST E LAS TOMERIC MATERIA LS USE COLORED DOTS FOR IDENTIFICATION.

NOTE: Not all models are available with all material options.

®

Halar

is a registered trademark of Solvay.

WILDEN PUMP & ENGINEERING, LLC 2 WI L-10 18 3 - E-03

0079 Tri-clamp fittings, wing nuts
0080 Tri-clamp fittings ONLY
0100 Wil-Gard 110V
0102 Wil-Gard sensor wires ONLY
0103 Wil-Gard 220V
0108 BSP, Wil-Gard 220V
0118 Stallion balls and seats ONLY, BSP
0120 Saniflo FDA, Wil-Gard 110V
0330 Wing nuts BSP

0067E Saniflo™ FDA, Wil-Gard II™ 220V (1935/2004/EC)
0070E Saniflo™ FDA (1935/2004/EC)
0075E Saniflo™ FDA, Stallion balls and seats (1935/2004/EC)
0120E Saniflo™ FDA, Wil-Gard II™ 110V (1935/2004/EC)

Section 3

HOW IT WORKS—PUMP

The Wilden diaphragm pump is an air-operated, positive displacement, self-priming pump. These drawings show flow pattern
through the pump upon its initial stroke. It is assumed the pump has no fluid in it prior to its initial stroke.

FIGUR E 1 The air valve dire cts pre ssurized
air to the back side of diaphragm A. The
compressed air is applied directly to the
liquid column separated by elastomeric
diaphragms. The diaphragm acts as
a separation membrane between the
compressed air and liquid; a balanced
load removes mechanical stress from the
diaphragm. The compressed air moves
the diaphragm away from the center
of the pump. The opposite diaphragm
is pulled in by the shaft connected to
the pressurized diaphragm. Diaphragm
B is on its suction stroke; air behind
the diaphragm has been forced out to
atmosphere through the exhaust por t of
the pump. The movement of diaphragm
B toward the center of the pump creates
a vacuum within chamber B. Atmos pheric
pressure forces fluid into the inlet
manifold forcing the inlet valve ball off its
seat. Liquid is free to move past the inlet
valve ball and fill the liquid chamber (see
shaded area).

HOW IT WORKS—AIR DISTRIBUTION SYSTEM

FIGURE 2 When the pressurized diaphragm,
diaphra gm A, re aches t he limit of it s disc harge
stroke, the air valve redirects pressurized
air to the back side of diaphragm B. The
pressurized air forces diaphragm B away
from the center while pulling diaphragm A
to the center. Diaphragm B is now on its
discharge stroke. Diaphragm B forces the
inlet valve ball onto its seat due to the
hydraulic forces developed in the liquid
chamber and manifold of the pump. These
same hydraulic forces lift the discharge
valve ball off its seat, while the opposite
discharge valve ball is forced onto its seat,
forcing fluid to flow through the pump
discharge. The movement of diaphragm A
toward the center of the pump creates a
vacuum within liquid chamber A. Atmos­pheric pressure forces fluid into the inlet
manifold of the pump. The inlet valve ball
is forced off its seat allowing the fluid being
pumped to fill the liquid chamber.

The Pro-Flo® patented air distribution system incorporates two
moving parts: the air valve spool and the pilot spool. The heart of
the system is the air valve spool and air valve. This valve design
incorporates an unbalanced spool. The smaller end of the spool
is pressurized continuously, while the large end is alternately
pressurized then exhausted to move the spool. The spool directs
pressurized air to one air chamber while exhausting the other.
The air causes the main shaft/diaphragm assembly to shif t to
one side — discharging liquid on that side and pulling liquid in
on the other side. When the shaf t reaches the end of its stroke,
the inner piston actuates the pilot spool, which pressurizes and
exhausts the large end of the air valve spool. The repositioning
of the air valve spool routes the air to the other air chamber.

FIGURE 3 At completion of the stroke,
the air valve again redirec ts air to the
back side of diaphragm A, which star ts
diaphragm B on its exhaust stroke. As
the pump reaches its original star ting
point, each diaphragm has gone through
one exhaust and one discharge stroke.
This constitutes one complete pumping
cycle. The pump may take several cycles
to completely prime depending on the
conditions of the application.

WI L-10 18 3 - E-03 3 WILDEN PUMP & ENGINEERING, LLC

Section 4

P4 Metal

DIMENSIONAL DRAWINGS

DIMENSIONS

ITEM METRIC (mm) STANDARD (inch)

A 368 14.5
B 64 2.5
C 206 8 .1
D 429 16.9

E 138 5.4

F 320 12. 6
G 2 11 8.3
H 262 10. 3

J 224 8.8
K 150 5.9

L 178 7. 0
M 51 2.0
N 10 0.4
P 338 13.3
R 224 8.8
S 155 6.1

T 19 3 7. 6
U 48 1.9
V 13 0.5

W 91 3.6

LW0 338 REV. A

P4 Metal Saniflo

51 mm (2")
TRI-CLAMP

LIQUID DISCHARGE

1/2" FNPT

AIR INLET

A

51 mm (2")
TRI-CLAMP

LIQUID INLET

J

K

N

L

B

FDA

M

3/4" FNPT

AIR EXHAUST

DIMENSIONS

ITEM METRIC (mm) STANDARD (inch)

D

A 396 15 .6
B 64 2.5

C 206 8.1

C

H

D 422 17.4

E 91 3.6

F 138 5.4
G 320 12.6

E

F

G

H 211 8.3

J 262 10.3

K 224 8.8

L 152 6.0

M 178 7.0

N 69 2.7

P 10 0.4

LW0 339 REV. A

P

WILDEN PUMP & ENGINEERING, LLC 4 WI L-10 18 3 - E-03

Section 5

PERFORMANCE

A. P4 Performance Curves

P4 METAL

RUBBER-FITTED

Ship Weight
316 Stainless Steel 20 kg (45 lb)
Cast Iron 22 kg (4 9 lb)
Alloy C 23 kg (51 lb)

Air Inlet ...................................19 mm (3/4")

Inlet ...................................... 38 mm (1-1/2")

Outlet ................................... 32 mm (1-1/4")

Suction Lift ......................5.8 m Dry (19.0')

8.0 m Wet (26.0')

Disp. per Stroke1 ...............0.98 L (0.26 gal)

Max. Flow Rate .............. 288 lpm (76 gpm)

Max. Size Solids .................4.8 mm (3/16")

1

Displacement per stroke was calculated
at 4.8 bar (70 psig) air inlet pressure
against a 2.1 bar (30 psig) head pressure.

Example: To pump 102 lpm (27 gpm)
against a discharge pressure head of

2.7 bar (40 psig) requires 4.1 bar (60 psig)
and 22 Nm3/h (13 scfm) air consumption.

CAUTION : Do not exceed 8.6 bar (125
psig) air supply pressure.

.............. Aluminum 13 kg (29 lb)

Flow rates indicated on chart were determined by pumping water.

For optimum life and performance, pumps should be specified so that daily operation
parameters will fall in the center of the pump's performance curve.

P4 METAL

TPE-FITTED

Ship Weight
316 Stainless Steel 20 kg (45 lb)
Cast Iron 22 kg (4 9 lb)
Alloy C 23 kg (51 lb)

Air Inlet ...................................19 mm (3/4")

Inlet ...................................... 38 mm (1-1/2")

Outlet ................................... 32 mm (1-1/4")

Suction Lift ...................... 5.2 m (17.0' Dry)

8.8 m (29.0' Wet)

Disp. per Stroke1 ................. 1.1 L (0.29 gal)

Max. Flow Rate .............. 307 lpm (81 gpm)

Max. Size Solids .................4.8 mm (3/16")

1

Displacement per stroke was calculated
at 4.8 bar (70 psig) air inlet pressure
against a 2.1 bar (30 psig) head pressure.

Example: To pump 114 lpm (30 gpm)
against a discharge pressure head of

2.7 bar (40 psig) requires 4.1 bar (60 psig)
and 26 Nm3/h (15 scfm) air consumption.

CAUTION : Do not exceed 8.6 bar (125
psig) air supply pressure.

.............. Aluminum 13 kg (29 lb)

Flow rates indicated on chart were determined by pumping water.

For optimum life and performance, pumps should be specified so that daily operation
parameters will fall in the center of the pump's performance curve.

WI L-10 18 3 - E-03 5 WILDEN PUMP & ENGINEERING, LLC

PERFORMANCE

P4 METAL

REDUCED-STROKE PTFE-FITTED

Ship Weight
316 Stainless Steel 20 kg (45 lb)
Cast Iron 22 kg (4 9 lb)
Alloy C 23 kg (51 lb)

Air Inlet ...................................19 mm (3/4")

Inlet ...................................... 38 mm (1-1/2")

Outlet ................................... 32 mm (1-1/4")

Suction Lift .........................3.7 m Dry (12')

8.5 m Wet (28')

Disp. per Stroke1 ............... 0.53 L (0.14 gal)

Max. Flow Rate .............. 295 lpm (78 gpm)

Max. Size Solids .................4.8 mm (3/16")

1

Displacement per stroke was calculated
at 4.8 bar (70 psig) air inlet pressure
against a 2.1 bar (30 psig) head pressure.

Example: To pump 83 lpm (22 gpm)
against a discharge pressure head of

2.7 bar (40 psig) requires 4.1 bar (60 psig)
and 34 Nm3/h (20 scfm) air consumption.

CAUTION : Do not exceed 8.6 bar (125
psig) air supply pressure.

.............. Aluminum 13 kg (29 lb)

Flow rates indicated on chart were determined by pumping water.

For optimum life and performance, pumps should be specified so that daily operation
parameters will fall in the center of the pump's performance curve.

P4 METAL

FULL-STROKE PTFE-FITTED

Ship Weight
316 Stainless Steel 20kg (45 lb)
Cast Iron 22 kg (4 9 lb)
Alloy C 23 kg (51 lb)

Air Inlet ...................................13 mm (1/2”)

Inlet ..................................... 38 mm (1-1/2”)

Outlet ...................................32 mm (1-1/4”)

Suction Lift ...................... 6.4m Dry (21.0’)

9.3 m Wet (30.6’)

Disp. per Stroke1 ................... 1.1 L (.28 gal)

Max. Flow Rate ...........330 lpm (87.2 gpm)

Max. Size Solids ................ 4.8 mm (3/16”)

1

Displacement per stroke was calculated
at 4.8 bar (70 psig) air inlet pressure
against a 2.1 bar (30 psig) head pressure.

Example: To pump 257 lpm (68 gpm)
against a discharge head of 1.4 bar
(20 psig) requires 4.1 bar (60 psig) and

96.5 Nm3/h (60 scfm) air consumption.

CAUTION : Do not exceed 8.6 bar (125
psig) air supply pressure.

.........Aluminum 13 kg (29 lb)

Flow rates indicated on chart were determined by pumping water.

For optimum life and performance, pumps should be specified so that daily operation
parameters will fall in the center of the pump's performance curve.

WILDEN PUMP & ENGINEERING, LLC 6 WI L-10 18 3 - E-03

PERFORMANCE

P4 METAL

ULTRA-FLEX

Ship Weight
316 Stainless Steel 20 kg (45 lb)
Cast Iron 22 kg (4 9 lb)
Alloy C 23 kg (51 lb)

Air Inlet ................................... 13 mm (1/2")

Inlet ...................................... 38 mm (1-1/2")

Outlet ................................... 32 mm (1-1/4")

Suction Lift ...................... 5.2 m (17.0' Dry)

8.5 m Wet (28.0')

Disp. per Stroke1 ............... 0.76 L (0.20 gal)

Max. Flow Rate .............. 269 lpm (71 gpm)

Max. Size Solids .................4.8 mm (3/16")

1

Displacement per stroke was calculated
at 4.8 bar (70 psig) air inlet pressure
against a 2.1 bar (30 psig) head pressure.

Example: To pump 170 lpm (45 gpm)
against a discharge pressure head of

2.0 bar (30 psig) requires 4.1 bar (60 psig)
and 85 Nm3/h (50 scfm) air consumption.

CAUTION : Do not exceed 8.6 bar (125
psig) air supply pressure.

.............. Aluminum 13 kg (29 lb)

TM

-FITTED

Flow rates indicated on chart were determined by pumping water.

For optimum life and performance, pumps should be specified so that daily operation
parameters will fall in the center of the pump's performance curve.

WI L-10 18 3 - E-03 7 WILDEN PUMP & ENGINEERING, LLC

SUCTION-LIFT CURVES

P4 METAL SUCTION­LIFT CAPABILITY

Suction-lift curves are calibrated for pumps operating
at 305 m (1,000') above sea level. This chart is meant
to be a guide only. There are many variables that can
affect your pump’s operating characteristics.

The number of intake and discharge elbows, viscosity
of pumping fluid, elevation (atmospheric pressure)
and pipe friction loss all affect the amount of suction
lift your pump will attain.

WILDEN PUMP & ENGINEERING, LLC 8 WI L-10 18 3 - E-03

Section 6

SUGGESTED INSTALLATION

Wilden pumps are designed to meet the performance
requirements of even the most demanding pumping
applications. They have been designed and manufactured
to the highest standards and are available in a variety of
liquid path materials to meet your chemical resistance
needs. Refer to the performance section of this manual for
an in-depth analysis of the performance characteristics of
your pump. Wilden offers the widest variety of elastomer
options in the industry to satisfy temperature, chemical
compatibility, abrasion resistance and flex concerns.

The suction pipe size should be at least the equivalent or
larger than the diameter size of the suction inlet on your
Wilden pump. The suction hose must be non-collapsible,
reinforced type as these pumps are capable of pulling a high
vacuum. Discharge piping should also be the equivalent
or larger than the diameter of the pump discharge which
will help reduce friction losses. It is critical that all fittings
and connections are airtight or a reduction or loss of pump
suction capability will result.

INSTALLATION: Months of careful planning, study,
and selection efforts can result in unsatisfactory pump
performance if installation details are left to chance.

Premature failure and long-term dissatisfaction can be
avoided if reasonable care is exercised throughout the
installation process.

LOCATION: Noise, safety and other logistical factors usually
dictate where equipment will be situated on the production
floor. Multiple installations with conflicting requirements
can result in congestion of utility areas, leaving few choices
for additional pumps.

Within the framework of these and other existing conditions,
every pump should be located in such a way that the
following key factors are balanced against each other to
maximum advantage.

ACCESS: First of all, the location should be accessible. If
it’s easy to reach the pump, maintenance personnel will
have an easier time carrying out routine inspections and
adjustments. Should major repairs become necessary, ease
of access can play a key role in speeding the repair process
and reducing total downtime.

AIR SUPPLY: Every pump location should have an air line
large enough to supply the volume of air necessary to
achieve the desired pumping rate. Use air pressure up to
a maximum of 8.6 bar (125 psig) depending on pumping
requirements.

For best results, the pumps should use a 5µ (micron) air
filter and regulator. The use of an air filter before the pump
will ensure that the majority of any pipeline contaminants
will be eliminated.

SOLENOID OPERATION: When operation is controlled by a
solenoid valve in the air line, three-way valves should be
used. This valve allows trapped air between the valve and
the pump to bleed off which improves pump performance.
Pumping volume can be estimated by counting the number
of strokes per minute and then multiplying the figure by the
displacement per stroke.

MUFFLER: Sound levels are reduced below OSHA
specifications using the standard Wilden muffler. Other
mufflers can be used to further reduce sound levels, but
they usually reduce pump performance.

ELEVATION: Selecting a site that is well within the pump’s
dynamic lift capability will assure that loss-of-prime issues will
be eliminated. In addition, pump efficiency can be adversely
affected if proper attention is not given to site location.

PIPING: Final determination of the pump site should not be
made until the piping challenges of each possible location
have been evaluated. The impact of current and future
installations should be considered ahead of time to make
sure that inadvertent restrictions are not created for any
remaining sites.

The best choice possible will be a site involving the
shortest and straightest hook-up of suction and discharge
piping. Unnecessary elbows, bends, and fittings should
be avoided. Pipe sizes should be selected to keep friction
losses within practical limits. All piping should be supported
independently of the pump. In addition, the piping should
be aligned to avoid placing stress on the pump fittings.

Flexible hose can be installed to aid in absorbing the forces
created by the natural reciprocating action of the pump. If the
pump is to be bolted down to a solid location, a mounting
pad placed between the pump and the foundation will assist
in minimizing pump vibration. Flexible connections between
the pump and rigid piping will also assist in minimizing
pump vibration. If quick-closing valves are installed at any
point in the discharge system, or if pulsation within a system
becomes a problem, a surge suppressor (SD Equalizer
should be installed to protect the pump, piping and gauges
from surges and water hammer.

If the pump is to be used in a self-priming application, make
sure that all connections are airtight and that the suction lift is
within the model’s ability. NOTE: Materials of construction and
elastomer material have an effect on suction lift parameters.
Please refer to the performance section for specifics.

When pumps are installed in applications involving flooded
suction or suction head pressures, a gate valve should be
installed in the suction line to permit closing of the line for
pump service.

Pumps in service with a positive suction head are most efficient
when inlet pressure is limited to 0.5–0.7 bar (7–10 psig).
Premature diaphragm failure may occur if positive suction
is 0.7 bar (10 psig) and higher.

NOTE: Pro-Flo

ALL WILDEN PUMPS ARE CAPABLE OF PASSING SOLIDS.
A STRAINER SHOULD BE USED ON THE PUMP INTAKE TO
ENSURE THAT THE PUMP'S RATED SOLIDS CAPACITY IS
NOT EXCEEDED.

CAUTION: DO NOT EXCEED 8.6 BAR (125 PSIG) AIR
SUPPLY PRESSURE.

®

and Accu-Flo™ pumps are not submersible.

®

)

WI L-10 18 3 - E-03 9 WILDEN PUMP & ENGINEERING, LLC

FOOTPAD

DISCHARGE

SUGGESTED INSTALLATION

This illustration is a generic
representation of an air-operated
double-diaphragm pump.

MUFFLER

FLEXIBLE

CONNECTION

SUCTION

EQUALIZER

SURGE DAMPENER

(OPTIONAL)

GAUGE
(OPTIONAL)

SHUT-OFF
VALVE

FLEXIBLE
CONNECTION

COMBINATION

FILTER & REGULATOR

AIR SHUT-OFF VALVE

NOTE: In the event of a power failure, the shut-off
valve should be closed, if the restarting of the pump is
not desirable once power is regained.

AIR-OPERATED PUMPS: To stop the pump from
operating in an emergency situation, simply close
the shut-off valve (user-supplied) installed in the air
supply line. A properly functioning valve will stop the
air supply to the pump, therefore stopping output. This
shut-of f valve should be located far enough away from
the pumping equipment such that it can be reached
safely in an emergency situation.

WILDEN PUMP & ENGINEERING, LLC 10 WIL-1018 3 - E - 03

SUGGESTED OPERATION & MAINTENANCE

OPERATION: The P4 pumps are pre-lubricated, and do
not require in-line lubrication. Additional lubrication
will not damage the pump, however if the pump is
heavily lubricated by an external source, the pump’s
internal lubrication may be washed away. If the pump is
then moved to a non-lubricated location, it may need to
be disassembled and re-lubricated as described in the
DISASSEMBLY/REASSEMBLY INSTRUCTIONS.

Pump discharge rate can be controlled by limiting the
volume and/or pressure of the air supply to the pump. A
regulator is used to control air pressure while a needle
valve is used to control volume. Pump discharge rate
can also be controlled by throttling the pump discharge
by partially closing a valve in the discharge line of the
pump. This action increases friction loss which reduces
flow rate. (See Section 5.) This is useful when the need
exists to control the pump from a remote location.
When the pump discharge pressure equals or exceeds
the air supply pressure, the pump will stop; no bypass
or pressure relief valve is needed, and pump damage
will not occur. The pump has reached a “deadhead”

TROUBLESHOOTING

situation and can be restarted by reducing the fluid
discharge pressure or increasing the air inlet pressure.
The Wilden P4 pump runs solely on compressed air and
does not generate heat, therefore your process fluid
temperature will not be affected.

MAINTENANCE AND INSPECTIONS: Since each
application is unique, maintenance schedules may be
different for every pump. Frequency of use, line pressure,
viscosity and abrasiveness of process fluid all affect
the parts life of a Wilden pump. Periodic inspections
have been found to offer the best means for preventing
unscheduled pump downtime. Personnel familiar with
the pump’s construction and service should be informed
of any abnormalities that are detected during operation.

RECORDS: When service is required, a record should be
made of all necessary repairs and replacements. Over
a period of time, such records can become a valuable
tool for predicting and preventing future maintenance
problems and unscheduled downtime. In addition,
accurate records make it possible to identify pumps
that are poorly suited to their applications.

Pump will not run or runs slowly.

1. Ensure that the air inlet pressure is at least 0.3 bar

(5 psig) above startup pressure and that the differential
pressure (the difference between air inlet and liquid
discharge pressures) is not less than 0.7 bar (10 psig).

2. Check air inlet filter for debris (see SUGGESTED

INSTALLATION).

3. Check for extreme air leakage (blow by) that would

indicate worn seals /bores in the air valve, pilot
spool and main shaft.

4. Disassemble pump and check for obstructions in

the air passageways or objects that would obstruct
the movement of internal parts.

5. Check for sticking ball check valves. If material being

pumped is not compatible with pump elastomers,
swelling may occur. Replace ball check valves and
seals with proper elastomers. Also, as the check
valve balls wear out, they become smaller and can
become stuck in the seats. In this case, replace balls
and seats.

6. Check for broken inner piston that will cause the air

valve spool to be unable to shift.

7. Remove plug from pilot spool exhaust.

2. Verify that vacuum required to lif t liquid is not
greater than the vapor pressure of the material
being pumped (cavitation).

3. Check for sticking ball check valves. If material being
pumped is not compatible with pump elastomers,
swelling may occur. Replace ball check valves and
seats with proper elastomers. Also, as the check
valve balls wear out, they become smaller and can
become stuck in the seats. In this case, replace balls
and seats.

Pump air valve freezes.

1. Check for excessive moisture in compressed
air. Either install a dryer or hot air generator for
compre ssed air. Alternativel y, a coalescing fil ter may
be used to remove the water from the compressed
air in some applications.

Air bubbles in pump discharge.

1. Check for ruptured diaphragm.

2. Check tightness of outer pistons (refer to Section 7).

3. Check tightness of fasteners and integrity of
O-rings and seals, especially at intake manifold.

4. Ensure pipe connections are airtight.

Pump runs but little or no product flows.

1. Check for pump cavitation; slow pump speed down
to allow thick material to flow into liquid chambers.

WI L-10 18 3 - E-03 11 WILDEN PUMP & ENGINEERING, LLC

Product comes out air exhaust.

1. Check for diaphragm rupture.

2. Check tightness of outer pistons to shaft.

Section 7

PUMP DISASSEMBLY

Tools Required:

• 7/16" Wrench

• 1/2" Wrench

• Adjustable Wrench

• Vise equipped w/soft
jaws (such as plywood,
plastic or other
suitable material)

CAUTION: Before any maintenance or repair is attempted, the compressed air line
to the pump should be disconnected and all air pressure allowed to bleed from the
pump. Disconnect all intake, discharge and air lines. Drain the pump by turning it
upside down and allowing any fluid to flow into a suitable container. Be aware of
any hazardous effects of contact with your process fluid.

NOTE: The model photographed for these instructions incorporates rubber
diaphragms, balls and seats.

Step 1

Before starting disassembly, mark
a line from each liquid chamber to
its corresponding air chamber. This
line will assist in proper alignment
during reassembly.

WILDEN PUMP & ENGINEERING, LLC 12 WI L-1018 3 -E- 0 3

Step 2

Using a 7⁄16" wrench, remove the
two (2) small clamp bands that
fasten the discharge manifold to
the liquid chambers.

Step 3

Remove the discharge manifold to
expose the valve balls and seats.
Inspect ball cage area of manifold
for excessive wear or damage.

PUMP DISASSEMBLY

Step 4

Remove the discharge valve balls
and seats from the liquid chambers
and inspect for nicks, chemical
attack or abrasive wear. Replace
worn parts with genuine Wilden
parts for reliable performance.

Step 5

Using a 1/2" wrench, remove the
two (2) large clamp bands which
fasten the intake manifold to the
liquid chambers.

Step 6

Lift liquid chambers and center
section from intake manifold to
expose intake valve balls and
seats. Inspect ball cage area of
liquid chamber for excessive wear
or damage.

Step 7

Remove one (1) set of large clamp
bands which secure one (1) liquid
chamber to the center section.

WI L-10 18 3 - E-03 13 WILDEN PUMP & ENGINEERING, LLC

Step 8

Lift liquid chamber away from
center section to expose diaphragm
and outer piston.

Step 9A

Using an adjustable wrench, or by
rotating the diaphragm by hand,
remove the diaphragm assembly.

NOTE: Due to var ying torque values,
one of the following two situations
may occur: 1) The outer piston,
diaphragm and inner piston remain
attached to the shaft and the entire
assembly can be removed from the
center section.

PUMP DISASSEMBLY

Step 9B

2) The outer piston, diaphragm and

inner piston separate from the shaft
which remains connected to the
opposite side diaphragm assembly.
Repeat disassembly instructions
for the opposite liquid chamber.
Inspect diaphragm assembly and
shaft for signs of wear or chemical
attack. Replace all worn parts with
genuine Wilden parts for reliable
performance.

Step 10

To remove diaphragm assembly from
shaft, secure shaft with soft jaws (a
vise fitted with plywood, plastic or
other suitable material) to ensure
shaft is not nicked, scratched or
gouged. Using an adjustable wrench,
remove diaphragm assembly from
shaft.

WILDEN PUMP & ENGINEERING, LLC 14 WIL-101 83-E- 0 3

AIR VALVE/CENTER SECTION DISASSEMBLY

Tools Required:

• 3/16" Hex-Head Wrench

• 1/4" Hex-Head Wrench

• Snap-Ring Pliers

• O-Ring Pick

CAUTION: Before any maintenance or repair is attempted, the compressed air line
to the pump should be disconnected and all air pressure allowed to bleed from the
pump. Disconnect all intake, discharge and air lines. Drain the pump by turning it
upside down and allowing any fluid to flow into a suitable container. Be aware of
hazardous effects of contact with your process fluid.

®

The Wilden P4 metal pump utilizes a revolutionary Pro-Flo

air distribution system.
Proprietary composite seals reduce the co efficient of friction and allow the P4 to
run lube-free. The Pro-Flo® air distribution system is designed to perform in on/off,
non-freezing, non-stalling, tough duty applications.

Step 1

Loosen the air valve bolts utilizing
a 3/16" hex-head wrench and then
remove muffler plate screws.

Step 2

Remove muffler plate and air valve
bolts from air valve assembly
exposing muffler gasket for

Step 3

Lift away air valve assembly
and remove air valve gasket for
inspection. Replace, if necessary.

inspection. Replace, if necessary.

WI L-10 18 3 - E-03 15 WILDEN PUMP & ENGINEERING, LLC

AIR VALVE/CENTER SECTION DISASSEMBLY

Step 4

Remove air valve end cap to expose
air valve spool by simply lifting up
on end cap once air valve bolts are
removed.

Step 7

Remove air chamber bolts with
1/4" hex-head wrench.

WILDEN PUMP & ENGINEERING, LLC 16 WIL-1 0183 -E- 0 3

Step 5

Remove air valve spool from air
valve body by threading one air
valve bolt into the end of the spool
and gently sliding the spool out of
the air valve body. Inspect seals for
signs of wear and replace entire
assembly if necessary. Use caution
when handling air valve spool to
prevent damaging seals.

NOTE:

removed from assembly. Seals are
not sold separately.

Step 8

Remove pilot spool bushing from
center block.

Seals should not be

Step 6

Remove pilot spool retaining snap
ring on both sides of center section
with snap-ring pliers.

Step 9

With O-ring pick, gently remove the
O-ring from the opposite side of the
notched end of the spool. Gently
remove the pilot spool from sleeve and
inspect for nicks or gouges and other
signs of wear. Replace pilot sleeve
assembly or outer sleeve O-rings, if
necessary. During re-assembly never
insert the pilot spool into the sleeve
with the “notched end” first, this end
incorporates the urethane O-ring and
will be damaged as it slides over the
ports cut in the sleeve.

Seals should not be

NOTE:

removed from pilot spool. Seals
are not sold separately.

AIR VALVE/CENTER SECTION DISASSEMBLY

A

Step 10A

Check center block shaf t seals for
signs of wear. If necessary, remove
shaft seals with O-ring pick and
replace.

Step 10B

NOTE: Threaded sleeves (see A

above) are removable and can be
replaced if necessary. Sleeves can
be press-fit by hand.

WI L-10 18 3 - E-03

17 WILDEN PUMP & ENGINEERING, LLC

REASSEMBLY HINTS & TIPS

RE ASS EM BLY:

Upon performing applicable maintenance to the air
distribution system, the pump can now be reassembled.
Please refer to the disassembly instructions for photos
and parts placement. To reassemble the pump, follow
the disassembly instructions in reverse order. The air
distribution system needs to be assembled first, then
the diaphragms and finally the wetted path. Please find
the applicable torque specifications on this page. The
following tips will assist in the assembly process.

• Lubricate air valve bore, center section shaft and pilot
spool bore with NLGI grade 2 white EP bearing grease
or equivalent.

• Clean the inside of the center section shaft bore to
ensure no damage is done to new shaft seals.

• A small amount of NLGI grade 2 white EP bearing
grease can be applied to the muffler and air valve
gaskets to locate gaskets during assembly.

• Make sure that the exhaust port on the muffler plate
is centered between the two exhaust ports on the
center section.

• Stainless bolts should be lubed to reduce the possibility
of seizing during tightening.

• Use a mallet to tamp lightly on the large clamp bands to
seat the diaphragm before tightening.

PROFLO® MAXIMUM TORQUE SPECIFICATIONS

Description of Part Torque

Air Valve 5.1 N·m (45 in-lb)

Air Chamber/Center Block 27.1 N·m (20 ft-lb)

Outer Pistons, All 54.2 N·m (40 ft-lb)

Small Clamp Bands 3.4 N·m (30 in-lb)

Large Clamp Bands (Rubber-Fitted) 10.7 N·m (95 in-lb)

Large Clamp Bands (PTFE-Fitted) 13.6 N·m (120 in-lb)

Figure A

SHA FT SE AL

SHAFT SEAL INSTALLATION:

PRE-INSTALLATION

• Once all of the old seals have been removed, the
inside of the bushing should be cleaned to ensure
no debris is left that may cause premature damage
to the new seals.

INSTALLATION

The following tools can be used to aid in the installation
of the new seals:

Needle-Nose Pliers
Phillips Screwdriver
Electrical Tape

• Wrap electrical tape around each leg of the needle­nose pliers (heat shrink tubing may also be used). This
is done to prevent damaging the inside surface of the
new seal.

• With a new seal in hand, place the two legs of the
needle-nose pliers inside the seal ring. (See Figure A.)

• Open the pliers as wide as the seal diameter will allow,
then with two fingers pull down on the top portion of
the seal to form a kidney shape. (See Figure B.)

• Lightly clamp the pliers together to hold the seal into
the kidney shape. Be sure to pull the seal into as tight
of a kidney shape as possible, this will allow the seal to
travel down the bushing bore easier.

• With the seal clamped in the pliers, insert the seal into
the bushing bore and position the bottom of the seal
into the correct groove. Once the bottom of the seal is
seated in the groove, release the clamp pressure on the
pliers. This will allow the seal to partially snap back to
its original shape.

• After the pliers are removed, you will notice a slight
bump in the seal shape. Before the seal can be properly
resized, the bump in the seal should be removed as
much as possible. This can be done with either the
Phillips screwdriver or your finger. With either the side
of the screwdriver or your finger, apply light pressure
to the peak of the bump. This pressure will cause the
bump to be almost completely eliminated.

• Lubricate the edge of the shaft with NLGI grade 2
white EP bearing grease.

• Slowly insert the center shaft with a rotating motion.
This will complete the resizing of the seal.

• Perform these steps for the remaining seals.

Figure B

NEEDLE-NOSE

PLIERS

TAPE

WILDEN PUMP & ENGINEERING, LLC 18 WIL-10183 - E - 03

SHA FT SE AL

TAPE

GASKET KIT INSTALLATION

Only P4 Cast Iron pumps come standard with
expanded PTFE Gasket Kits (P/N 04-9502-99).
Carefully prepare sealing surfaces by removing all
debris and foreign matter from diaphragm bead

Step 1

Gently remove the adhesive
covering from the back of the PTFE
tape. Ensure that the adhesive strip
remains attached to the PTFE tape.

Step 2

Starting at any point, place the PTFE
tape in the center of the diaphragm
bead groove on the liquid chamber
and pres s lightly on the tape to en sure
that the adhesive holds in place
during assembly. Do not stretch the
tape during placement in the center
of diaphragm bead groove.

and all mating surfaces. If necessary, smooth or
deburr all sealing surfaces. Mating surfaces must be
properly aligned in order to ensure positive sealing
characteristics.

Step 3

The end of the tape should overlap
approximately 13 mm (1/2"). Proceed
to install the PTFE tape on the
remaining diaphragm.

WI L-10 18 3 - E-03 19 WILDEN PUMP & ENGINEERING, LLC

Section 8

EXPLODED VIEW AND PARTS LISTING

P4 METAL

Full-Stroke Diaphragm-Fitted EXPLODED VIEW

30

29

35

34

26

25

28

33

27

FULL-STROKE PTFE-FITTED

20

14

32

26

25

21

22

23

24

ALL CIRCLED PART IDENTIFIERS ARE INCLUDED IN REPAIR KITS (see Section 9).

WILDEN PUMP & ENGINEERING, LLC 20 WIL-10183 - E - 03

EXPLODED VIEW AND PARTS LISTING

P4 METAL

No. Part Description Qty.

1 Pro-Flo

Full-Stroke Diaphragm-Fitted PARTS LISTING

®

Air Valve Assembly

P4/AAPP

P/N

1

1 04-2000-20-700 04-2000-20-700 04-2000-20-700 04-2000-20-700

P4/WAPP

P/N

P4/SAPP

P/N

P4/SAPP/070

P/N

2 O-Ring ( -225 ), End Cap (1.859 x .13 9) 1 04-2390-52-700 04-2390-52-700 04-2390-52-700 04-2390-52-700
3 End Cap, Pro-F lo

®

1 0 4-2330 -20 -700 04-2 330-20-700 04-2330-20-700 04-233 0-2 0-700
4 Screw, HHC, A ir Valve (1/ 4" x 4 .5" ) 4 01-6000-03 01-6000-03 01-6000-03 01-6000-03
5 Screw, SHCS, 10-16 x 1 3/ 4" 2 04-6351-03 04-6351-03 04-6351-03 04-6351-03
6 Muf fler Plate, Pro-Flo

®

1 04-3180-20-700 04-3180-20-700 04-3180-20-700 04-3180-20-700

7 Gasket, Muffler Plate 1 04-3500-52-700 04-3500-52-700 04-3500-52-700 04-3500-52-700
8 Gasket, Air Valve 1 04-2600-52-700 04-2600-52-700 04-2600-52-700 04-2600-52-700

9 Center Section Assembly 1 04-3110 -20 04-3110 -2 0 04- 3110-20 0 4-3110-20

10 Bushing, Reducer, NPT/BSP Combo 1 04-6950-20-700 04-6950-20-700 04-6950-20-700 04-6950-20-700
11 Nut, Square, 1/4"-2 0 4 00-6505-03 00-6505-03 00-6505-03 00-6505-03
12 Sleeve, Threaded, Pro-Flo

®

Center Block 4 04 -7710 -08 0 4-7710 -08 04 -7710-08 0 4-7710-0 8

13 Removable Pilot Sleeve Assembly 1 04-3880-99 04-3880-99 04-3880-99 04-3880-99

14 Pilot Spool Retaining O-Ring 2 04-2650-49-700 04-2650-49-700 04-2650-49-700 04-2650-49-700

15 Shaft Seal 2 08-3210-55-225 08-3210-55-225 08-3210-55-225 08-3210-55-225
16 Gasket, Center Block, Pro-Flo

17 Air Chamber, Pro-Flo

®

®

2 04-3526-52 04-3526-52 04-3526-52 04-3526-52

2 0 4-3651- 01 04-3651- 01 04- 3651-01 0 4-3651- 01

18 Screw, HSFHS, 3 /8"-16 x 1" 8 71-6250-08 71-6250-08 71-6250-08 71-6250-08
19 Retaining Ring 2 04-3890-03 04-3890-03 04-3890-03 04-3890-03
20 Shaft, Pro-Flo
21 Shaft Stud (P4/WAPP: Bolt)

®

2

1 04-3800-03-700 04-3800-03-700 04-3800-03-700 04-3800-03-700

2 08-6150-08 04-6091-08 08-6150-08 08-6150-08

22 Inner Piston 2 04-3700-01-700 04-3700-01-700 04-3700-01-700 04-3700-01-700

23 Diaphragm 2 * * * 04-1010-56

24 Outer Piston 2 04-4552-01 04-4550-08 04-4550-03 04-4550-03P

25 Valve Seat 4 * * * 04-1120-56
26 Valve Ball 4 * * * 04-1080-56

27 Liquid Chamber 2 04-5000-01 04-5000-02 04-5000-03 04-5000-03P
28 Large Clamp Band Assy. 2 0 4-73 30- 08 0 4-733 0-0 8 0 4-73 30-0 3 04-7 3 30- 03-7 0P
29 Small Clamp Band Assy. 4 04 -7100 -08 0 4-710 0-0 8 04-710 0-03 0 4-710 0-0 3-70 P
30 Manifold, Discharge 1 04-5020-01 04-5020-02 04-5020-03 04-5020-03-70
31 Manifold, Footed Inlet 1 04-5080-01 04-5080-02 04-5080-03 04-5080-03-70
32 Carriage Bolt, L arge Clamp Band ( 5/16 "-18 x 2-1/2 ") 4 04-6070-08 04-6070-08 04-6070-03 04-6070-03
33 Hex Nut, Large Clamp Band (5/16"-18) 4 04-6420-08 04-6420-08 08-6400-03 08-6661-10
34 Carriage Bolt , Small Clamp Band (1/4"-2 0 x 2") 8 04-6050-08 04-6050-08 01-6070-03 01-6070-03
35 Hex Nut, Small Clamp Band (1/4"-20) 8 04-6400-08 04-6400-08 04-6400-03 04-66 51-10

Muf fler (Not Shown) 1 0 4-3510-99 04-3510-99 04-3510-99 04 -3 510-99
Washer, Flat 1/ 4" ( Not Show n) 8 N/A N/A N/A 04-6700-07-70
Washer, Flat 5 /16 " (Not Shown) 4 N/A N/A N/A 08-6700-07-70

36 Diaphragm, Primary Full Stroke PTFE 2 * * * *
37 Diaphragm, Backup Full Stroke PTFE 2 * * * *

1

Air Valve Assembly includes item numbers 2 and 3.

2

NOTE: Rubber/ TPE-fit ted cast iron pumps use 1 ⁄ 2"-20 x 1-1⁄ 2" Hex Bolt (P/ N 04- 6091-0 8) with washer (P/N 04 -6800 -08 ).
BSP-fitted pumps are available. Contact your distributor for part numbers.
For optional P4 Metal Pump elastomers, see Section 9.
NOTE: Aluminum pumps are available with a screen base. Requires (1) 04-56 20- 01 (Screen) , (4) 04-614 0-08 (Bolt) and (4) 15-6 720-0 8 (Washer).

-007 0 Specialt y Code = Sani flo

FDA

*See Section 9 — Elastomer Chart

All boldface items are primary wear parts.

WI L-10 18 3 - E-03 21 WILDEN PUMP & ENGINEERING, LLC

EXPLODED VIEW AND PARTS LISTING

P4 METAL

Reduced-Stroke Diaphragm-Fitted EXPLODED VIEW

25 21 22 2024

ULTRA-FLEX™-FITTED

ALL CIRCLED PART IDENTIFIERS ARE INCLUDED IN REPAIR KITS (see Section 9).

WILDEN PUMP & ENGINEERING, LLC 22 WIL-1018 3 - E - 03

EXPLODED VIEW AND PARTS LISTING

P4 METAL

No. Part Description Qty.

1 Pro-Flo

Reduced-Stroke Diaphragm-Fitted PARTS LISTING

®

Air Valve Assembly

P4/AAPP

P/N

1

1 04-2000-20-700 04-2000-20-700 04-2000-20-700 04-2000-20-700

P4/WAPP

P/N

P4/SAPP

P/N

P4/SAPP/0070

P/N

2 O-Ring ( -225 ), End Cap (1.859 x .13 9) 1 04-2390-52-700 04-2390-52-700 04-2390-52-700 04-2390-52-700
3 End Cap, Pro-F lo

®

1 04-23 30-20-700 0 4-2 330-20-700 04-2330-20-700 04-23 30-20-700
4 Screw, HHC, A ir Valve (1/ 4" x 4 .5" ) 4 01-6000-03 01-6000-03 01-6000-03 01-6000-03
5 Screw, SHCS, 10-16 x 1 3/ 4" 2 04-6351-03 04-6351-03 04-6351-03 04-6351-03
6 Muf fler Plate, Pro-Flo

®

1 04-3180-20-700 04-3180-20-700 04-3180-20-700 04-3180-20-700

7 Gasket, Muffler Plate 1 04-3500-52-700 04-3500-52-700 04-3500-52-700 04-3500-52-700
8 Gasket, Air Valve 1 04-2600-52-700 04-2600-52-700 04-2600-52-700 04-2600-52-700

9 Center Section Assembly 1 04- 3110-20 0 4 -3110-20 0 4-3 110 -20 0 4-3 110 -20

10 Bushing, Reducer, NPT/BSP Combo 1 04-6950-23-700 04-6950-23-700 04-6950-23-700 04-6950-23-700
11 Nut, Square, 1/4"-2 0 4 00-6505-07 00-6505-07 00-6505-07 00-6505-07
12 Sleeve, Threaded, Pro-Flo

®

Center Block 4 0 4-7710-0 8 04-7 710-08 04-7710 -08 0 4-7710-0 8

13 Removable Pilot Sleeve Assembly 1 04-3880-99 04-3880-99 04-3880-99 04-3880-99

14 Pilot Spool Retaining O-Ring 2 04-2650-49-700 04-2650-49-700 04-2650-49-700 04-2650-49-700

15 Shaft Seal 2 08-3210-55-225 08-3210-55-225 08-3210-55-225 08-3210-55-225
16 Gasket, Center Block, Pro-Flo

17 Air Chamber, Pro-Flo

®

®

2 04-3526-52 04-3526-52 04-3526-52 04-3526-52

2 04-3651-01 0 4-3651-01 0 4-3 651-01 0 4-36 51- 01

18 Screw, HSFHS, 3 /8"-16 x 1" 8 71-6250-08 71-6250-08 71-6250-08 71-6250-08
19 Retaining Ring 2 04-3890-03 04-3890-03 04-3890-03 04-3890-03
20 Shaft, Pro-Flo

Shaft, Pro-Flo®, Ultra-Flex

®

TM

1 04-3820-03-700 04-3820-03-700 04-3820-03-700 04-3820-03-700

1 04-3830-03-700 04-3830-03-700 04-3830-03-700 N/A

21 Stud, Shaft 2 04-6150-08 04-6150-08 04-6150-08 04-6150-08

Shaft Stud, Ultra-Flex

TM

2 N/R 04-6152-08 04-6152-08 N/A

22 Inner Piston 2 0 4-3715-01 0 4-3715-01 0 4-3 715-01 0 4-3715- 01

Inner Piston, Ultra-Flex

TM

2 04-3760-01-700 04-3760-01-700 04-3760-01-700 N/A

23 Back-up Diaphragm 2 * * * *
24 Diaphragm 2 * * * *

25 Outer Piston 2 04-4600-01 04-4600-03 04-4600-03 04-4600-03P

Outer Piston, Ultra-Flex

TM

2 04-4560-01 04-4560-02 02-4550-03 N/A

26 Valve Seat 4 04 -1121-01 0 4-1121- 08 04-112 1-03 04-112 1-03P
27 Valve Seat, O-Ring (2.60 9" x .139") 4 04-1200-55 04-1200-55 04-1200-55 04-1200-55
28 Valve Ball 4 04-1080-55 04-1080-55 04-1080-55 04-1080-55

29 Liquid Chamber 2 04-5000-01 04-5000-02 04-5000-03 04-5000-03P
30 Large Clamp Band A ssy. 2 0 4-73 30-0 3 04-7 3 30-0 3 04-7 3 30-0 3 0 4-73 30- 03-70
31 Small Clamp Band Assy. 4 04 -7100-03 04-710 0-03 04-710 0-03 04-710 0-0 3-70
32 Manifold, Discharge 1 04-5020-01 04-5020-02 04-5020-03 04-5020-03-70P
33 Manifold, Footed Inlet 1 04-5080-01 04-5080-02 04-5080-03 04-5080-03-70P
34 Carriage Bolt , Large Clamp Band ( 5/16 "-18 x 2-1/2") 4 04-6070-03 04-6070-03 04-6070-03 04-6070-03
35 Hex Nut, Large Clamp Band ( 5/16 "-18) 4 08-6400-03 08-6400-03 08-6400-03 08-6661-10
36 Carriage Bolt, Small Clamp Band (1/4 "-2 0 x 2") 8 01-6070-03 01-6070-03 01-6070-03 01-6070-03
37 Hex Nut, Small Clamp Band (1/4"-20) 8 04-6400-03 04-6400-03 04-6400-03 04-6 651-10

Muf fler (Not Shown) 1 04-3510-99 04-3510 -9 9 04-3510-9 9 0 4-3510-99
Washer, Flat 1/ 4" ( Not Show n) 8 N/A N/A N/A 04-6700-07-70
Washer, Flat 5 /16 " (Not Shown) 4 N/A N/A N/A 08-6700-07-70

1

Air Valve Assembly includes item numbers 2 and 3.
BSP-fitted pumps are available. Contact your distributor for part numbers.
Fluoro-Seal ™ O-rings available upon request.
Back-up Diaphragm for P TFE-fitted pump: P/ N 04-1060 -51. Saniflex™ Back-up Diaphragm, P/ N 04-1060-56,
is available upon request for PT FE-fi tted pumps. Please consult your local distributor.

0070 Specialty Code = Saniflo

FDA

All boldface items are primary wear parts.

WI L-10 18 3 - E-03 23 WILDEN PUMP & ENGINEERING, LLC

EXPLODED VIEW AND PARTS LISTING

P4 METAL SANIFLO™

1935/2004/EC EXPLODED VIEW

FULL-STROKE PTFE

FULL-STROKE IPD

REDUCED-STROKE PTFE

ULTRA-FLEX™

REDUCED-STROKE IPD

LW0096, Rev. A

ALL CIRCLED PART IDENTIFIERS ARE INCLUDED IN REPAIR KITS (see Section 9).

WILDEN PUMP & ENGINEERING, LLC 24 WI L-10 18 3 - E-03

EXPLODED VIEW AND PARTS LISTING

P4 METAL SANIFLO™

1935/2004/EC PARTS LISTING

P4/SSPPP/

1935/2004/EC

Item Description Qty.

P/N

AIR DISTRIBUTION COMPONENTS

1 Air Valve Assembly, Pro-Flo

2 End Cap 1 04-2330-20-700

3 O-Ring (-225), End Cap (Ø1.859” x Ø.139”) 1 04-2390-52-700

4 Screw, SHC, Air Valve (1/4”-20 x 4 1/2”) 4 01-6000-03
5 Nut, Square (1/4”-20) 4 00-6505-03

Self Tapping Screw, SHC, Air Valve (#10-16 x 1-3/4”)

6
7 Muffler Plate, Pro-Flo 1 04-3180-20-700

8 Gasket, Muffler Plate, Pro-Flo 1 04-3500-52-700
9 Gasket, Air Valve, Pro-Flo 1 04-2600-52-700

10 Center Block Assembly, Pro-Flo
11 Sleeve, Theraded, Pro-Flo Center Block 4 04-7710-08

12 Pilot Sleeve Assembly 1 04-3880-99
13

O-Ring (-009), Pilot Spool Retaining (Ø.208” x Ø.070”)
14 Seal, Shaft 2 08-3210-55-225
15 Gasket, Center Block Pro-Flo 2 04-3526-52

16 Air Chamber, Pro-Fl
17 Screw, SFCHC (3/8”-16 x 1”) 8 71-6250-08
18 Retaining Ring 2 04-3890-03
19 Muffler 3/4” MNPT 1 04-3510-99R
20 Bushing, Reducer, 3/4” MNPT to 1/2” MNPT 1 04-6950-20-700

1

2

o

1 04-2000-20-700

2 04-6351-03

1 04-3110-20

2 04-2650-49-700

2 04-3651-01

WETTED PATH COMPONENTS

21 Liquid Chamber 2 04-5000-03P
22 Manifold, Discharge Tri-Clamp 1 04-5020-03-70P
23 Manifold, Footed Inlet Tri-Clam
24 Large Clamp Band Assembly 2 04-7330-03-70
25

RHSN Bolt, Large Clamp Band (5/16”-18 x 2-1/2”)
26 Wing Nut, Large Clamp Band (5/16”-18) 4 08-6661-10
27 Washer, Brass Flat (Ø.340” x Ø.750” x .063”) 4 08-6700-07-70
28 Small Clamp Band Assembly 8 04-7100-03-70
29 RHSN Bolt, Small Clamp Band (1/4”-20 x 2-1/4”) 8 01-6070-03
30 Wing Nut, Small Clamp Band (1/4”-20) 8 04-6651-10
31 Washer, Brass Flat (Ø.251” x Ø.620” x .063”) 8 04-6700-07-70

p

1 04-5080-03-70P

4 04-6070-03

VALVE BALLS/VALVE SEATS/VALVE O-RINGS

32 Ball, Valve, Pkg 4 1 *
33 Seat, Valve, Pkg 4 1 *

Seat, Valve, Stainless Steel 4 04-1121-03E

O-Ring (-226), Valve Seat (Ø.1.984” x Ø.139”), (Not Shown), Pkg 4

34

1 04-1200-55E

FULL-STROKE RUBBER/TPE/PTFE COMPONENTS

35 Shaft 1 04-3800-03-700
36 Stud, Shaft (1/2”-20 x 1-7/8”) 2 08-6150-08
36 Piston, Inner 2 04-3700-01-700

38 Diaphragm, Primary, Pkg 2 1 *
39 Diaphragm, Back-Up, Pkg 2 1 *

40 Piston, Outer 2 04-4550-03P

P4/SSPPP/

1935/2004/EC

Item Description Qty.

P/N

ULTRA-FLEX COMPONENTS

35 Shaft 1 04-3830-03-700
36 Stud, Shaft (3/8-16 x 1-1/2”) 2 04-6152-08
37 Piston, Inner 2 04-3760-01-700

38 Diaphragm Primary, Pkg 2 1 *

39 Piston, Outer 2 02-4550-03P

REDUCED STROKE PTFE COMPONENTS

35 Shaft 1 04-3820-03-700
36 Stud, Shaft (1/2-20 x 1-1/2”) 2 04-6150-08
37 Piston, Inner 2 04-3752-01

38 Diaphragm Primary, Pkg 2 1 *
39 Diaphragm, Back-Up, Pkg 2 1 *

40 Piston, Outer 2 04-4600-03P

REDUCED STROKE IPD COMPONENTS

35 Shaft 1 04-3820-03-700
36 Stud, Shaft (1/2-20 x 1-1/2”) 2 04-6150-08
37 Piston, Inner 2 04-3755-01

38 Diaphragm Primary, Pkg 2 1 *
39 Diaphragm, Back-Up, Pkg 2 1 *

40 Piston, Outer 2 N/A

FULL-STROKE IPD COMPONENTS

35 Shaft 1 04-3800-03-700
36 Stud, Shaft (1/2-20 x 1-7/8”) 2 08-6150-08
37 Piston, Inner 2 04-3700-01-700

38 Diaphragm Primary, Pkg 2 1 *
39 Diaphragm, Back-Up, Pkg 2 1 *

40 Piston, Outer 2 N/A

1

Air Valve Assembly includes items 2 and 3.

2

Plastic Center Block Assembly includes items 14 and 20.

All boldface items are primary wear parts.

LW0084, Rev. B

WI L-10 18 3 - E-03 25 WILDEN PUMP & ENGINEERING, LLC

Section 9

P4 METAL

ELASTOMER OPTIONS

MATERIAL DI APHRAGMS ( 2)

Neoprene 04-1010-51 04-1020-51 04-1060-51 N/A 04-1080-51 0 4-1120-5 1* N/A
Buna-N 0 4-1010-52 04-1020-52 N/A N/A 04-1080-52 0 4-112 0-52 * N/A
FKM 04 -1010-53 04-1020-53 N/A N/A 04-1080-53 04-1120-53* N/A
EPDM 04-1010-54 04-1020-54 04-1060-54 N/A 04-1080-54 04-112 0-54* N/A
PTFE 04-1010-55 N/A N/A N/A 04-1080-55 N/A 04 -120 0-55
Full-Stroke PTFE 04-1040-55 N/A N/A N/A N/A N/A N/A
Saniflex™ 04-1010-56 N/A 04-1060-56 04-1065-5 6 04-1080-56 0 4-112 0 -56* N/A
Polyurethane 04-1010-50 N/A N/A N/A 04-1080-50 04-1120-50* N/A
Wil-Flex™ 04-1010-5 8 N/A N/A 0 4-10 65-5 7 04-1080-58 0 4-112 0-5 8* N/A
Aluminum N/A N/A N/A N/A N/A 0 4 -1121- 01 N/A
316 Stainless Steel N/A N/A N/A N/A N/A 0 4 -1121- 0 3 N/A
Alloy C N/A N/A N/A N/A N/A 04-1121-04 N/A
Mild Steel N/A N/A N/A N/A N/A 04-1121-08 N/A

*NOTE : Rubber/ TPE valve seat s do not require O-rings.
Backup diaphragms for use with PTF E diaphragms only.

ULTRA-FLEX™

DIA PHRAGMS (2 )

REDUCED-STROKE

BACKUP

DIA PHRAGMS (2 )

FULL-STROKE

BACKUP

DIA PHRAGMS (2 ) VALVE BALLS (4) VALV E SEATS ( 4)

VALVE SEAT
O-RINGS (4)

P4 METAL SANIFLO™ 1935/2004/EC

REDUCED-STROKE

BACKUP

MATERIAL DIAPHRAGMS

FDA BUNA-N
FDA EPDM
FDA FKM
FDA Wil-Flex™
SANIFLEX™
PTFE 04-1010-55E N/A N/A N/A N/A

®

04-1010-69E
04-1010-74E

N/A
N/A

04-1010-56E

DIAPHRAGMS

N/A 04-1020-52E N/A N/A

04-1060-54E 04-1020-54E N/A N/A

N/A N/A N/A N/A
N/A N/A 04-1040-55E 04-1065-57E

04-1060-56E N/A N/A 04-1065-56E

ULTRA-FLEX™
DIAPHRAGMS

FULL-STROKE

DIAPHRAGMS

FULL-STROKE

BACKUP

DIAPHRAGMS

FULL-STROKE

MATERIAL

FDA BUNA-N
FDA EPDM N/A N/A N/A N/A N/A
FDA FKM N/A N/A N/A
FDA Wil-Flex™ 04-1022-57E N/A 04-1031-57E 04-1080-57E 04-1120-57E
SANIFLEX™ 04-1022-56E N/A N/A 04-1080-56E 04-1120-56E
PTFE N/A 04-1030-72E N/A 04-1080-55E N/A

®

EZ-INSTALL

DIAPHRAGMS

N/A N/A N/A N/A N/A

REDUCED-STROKE
IPD DIAPHRAGMS

IPD

DIAPHRAGMS

VALVE
BALLS

08-1080-68-72E

VALVE
SEATS

N/A

LW0084, Rev. B

ELASTOMER KITS OPTIONS

PRO-FLO

DESCRIPTION NEOPRENE BUNA-N VITON

Pro-Flo
Pro-Flo® Metal (Ultra-Flex™) 04-9564-51 04-9564-52 04-9564-53 04-9564-54

DESCRIPTION REDUCED-STROKE PTFE WIL-FLEX™ SANIFLEX™ POLYURETHANE

Pro-Flo

®

®

®

Metal 04-9554-51 04-9554-52 04-9554-53 04-9554-54

®

Metal 04-9554-55 04-9554-58 04-9554-56 04-9554-50

EPDM

WILDEN PUMP & ENGINEERING, LLC 26 W I L-1018 3 -E- 0 3

DECLARATION OF CONFORMITY

STATEMENT OF COMPLIANCE TO REGULATIONS (EC) NO 1935/2004

ON MATERIALS AND ARTICLES INTEDNDED TO COME INTO CONTACT WITH FOOD

(as per Article 16 of EGULATION (EC) No 1935/2004)

Wilden Pump & Engineering, LLC, 22069 Van Buren Street, Grand Terrace, CA 92313-5607 USA,
certifies as the manufacturer that the Air-Operated Double Diaphragm pumps listed below comply with the
European Community Regulation 1935/2004/(EC) for Food Contact Materials.

§ 25 mm (1”) Saniflo Hygienic™ HS Metal Pump:

(PX,XPX)2 /(SS,SZ)(SSS,NNN)/(FBS,FES,FSL,FSS,LEL,TEU,TSS,TSU)/(FB,FE,FS,TF)/(FB,FE,FV,TF)/(0770-0789)E

§ 38 mm – 76 mm (1-½”-3”) Pro-Flo X™ Saniflo Hygienic HS Metal Pump:

(PX,XPX)(4,8,15)/(SS,SZ)(SSS,NNN)/(BNU,EPU,FBS,FES,FSL,FSS,LEL,TEU,TSS,TSU,ZSS)/(FB,FE,FS,FV,SF,TF,TM)/(FB,FE,TF)/(0770-0789)E

§ 38 mm – 76 mm (1-½”-3”) Pro-Flo SHIFT® Saniflo Hygienic HS Metal Pump:

(PS,XPS)(4,8,15)/(SS,SZ)(SSS,NNN)/(FBS,FES,FSL,FSS,LEL,TSS,ZSS)/(FB,FE,FS,FV,SF,TF,TM)/(FB,FE,TF)/(0770-0789)E

§ 76 mm (3”) Saniflo HS High Pressure Advanced Metal Pump

H1500/(SS,SZ)III/(FSL,TSS)/(TF,TM)/(FE,FV,TF)/0770E

§ 13 mm (½”)Pro-Flo® & Pro-Flo X Saniflo FDA Metal Pump Models:

(P,PX,XPX)1/(SS,SZ)(AAA,GGG,JJJ,LLL,PPP)/(FSL,FSS,TEU,TSU)/(FS,TF)/S(FS,TF)/(0067,0070,0120)E

§ 25 mm (1”) Pro-Flo Saniflo FDA Metal Pump Models:

P2/(SS,SZ)(LLL,PPP)/(FBS,FES,FSL,FSS,LEL,TEU,TSS,TSU)/(FS,TF)/S(FS,TF)/2070E

§ 38 mm (1-½”) Pro-Flo & Pro-Flo X Saniflo FDA Metal Pump Models:

(P,PX,XPX)4/(SS,SZ)(AAA,LLL,NNN,SSS)/(BNU,EPU,FBS,FES,FSL,FSS,TEU, TSS, TSU)/(FS,TF)/(FS,STF)/(0067,0070,0075,0120)E

§ 51 mm (2”) Pro-Flo & Pro-Flo X Saniflo FDA Metal Pump Models:

(P,PX,XPX)8/(SS,SZ)(AAA,PPP,NNN,SSS)/( BNU,EPU,FBS,FES,FSS,TEU,TSU,TSS)/(FS,TF)/(FS,STF)/(0070,0075,0120)E

§ 76 mm 3” Pro-Flo X Saniflo FDA Metal Pump Models:

(PX,XPX)15/(SS,SZ)(AAA,NNN,SSS)/(BNU,EPU,FSL,FSS,TEU,TSU,TSS)/(FS,TF)/(FS,STF)/(0070,0075,0120)E

§ 38 mm 1-½” Pro-Flo SHIFT Saniflo FDA Metal Pump Models:

XPS4/(SS,SZ)(AAA,NNN,SSS)/(FBS,FES,FSL,FSS,TSS,ZSS)/(FS,TF)/(FS,STF)/(0067,0070,0775,0120)E

§ 51 mm 2” Pro-Flo SHIFT Saniflo FDA Metal Pump Models:

XPS8/(SS,SZ)(AAA,NNN,SSS)/(FBS,FES,FSL,FSS,TSS,ZSS)/(FS,TF)/(FS,STF)/(0070,0075,0120)E

§ 76 mm 3” Pro-Flo SHIFT Saniflo FDA Metal Pump Models:

XPS15/(SS,SZ)(AAA,NNN,SSS)/(FSL,FSS,TSS,ZSS)/(FS,TF)/(FS,STF)/(0070,0120,0341)E

Materials used in equipment that are intended to contact food belong to the groups of materials listed in Annex 1 (EC)
1935/2004 (List of groups of materials and articles which may be covered by specific measures)

5) Rubbers

8) Metal and Alloy 10) Plastics

Compliance is subject to material and equipment storage, handling and usage recommended by Wilden in the engineering
operation and maintenance manual and supplemental technical publications.

This declaration is based on the following information:

Statements of raw material suppliers

Wilden will make available to the competent authorities appropriate documentation to demonstrate compliance

Approved By:

Chris Distaso
Director of Engineering
Date: July 5, 2017

NOTES

WARRANTY

Each and every product manufactured by Wilden Pump and Engineering, LLC is built to meet the highest
standards of quality. Every pump is functionally tested to insure integrity of operation.

Wilden Pump and Engineering, LLC warrants that pumps, accessories and parts manufactured or supplied by
it to be free from defects in material and workmanship for a period of five (5) years from date of installation or
six (6) years from date of manufacture, whichever comes first. Failure due to normal wear, misapplication, or
abuse is, of course, excluded from this warranty.

Since the use of Wilden pumps and parts is beyond our control, we cannot guarantee the suitability of any pump
or part for a particular application and Wilden Pump and Engineering, LLC shall not be liable for any consequential
damage or expense arising from the use or misuse of its products on any application. Responsibility is limited
solely to replacement or repair of defective Wilden pumps and parts.

All decisions as to the cause of failure are the sole determination of Wilden Pump and Engineering, LLC.

Prior approval must be obtained from Wilden for return of any items for warranty consideration and must be
accompanied by the appropriate MSDS for the product(s) involved. A Return Goods Tag, obtained from an
authorized Wilden distributor, must be included with the items which must be shipped freight prepaid.

The foregoing warranty is exclusive and in lieu of all other warranties expressed or implied (whether written or oral)
including all implied warranties of merchantability and fitness for any particular purpose. No distributor or other
person is authorized to assume any liability or obligation for Wilden Pump and Engineering, LLC other than expressly
provided herein.

PLEASE PRINT OR TYPE AND FAX TO WILDEN

PUMP INFORMATION

Item # Serial #

Company Where Purchased

YOUR INFORMATION

Company Name

Industry

Name Title

Street Address

City State Postal Code C ountry

Telephone Fax E-mail Web Address

Number of pumps in facility? Number of Wilden pumps?

Types of pumps in facility (check all that apply): Diaphragm

Media being pumped?

Other

Centrifugal

Gear

Submersible

Lobe

How did you hear of Wilden Pump?

Other

Trade Journal

Trade Show

Internet/ E-mail

Distributor

ONCE COMPLETE, FAX TO [phone]

OR GO TO PSGDOVER.COM > WILDEN > SUPPORT TO COMPLETE THE WARRANTY REGISTRATION ONLINE

NOTE: WARRANTY VOID IF PAGE IS NOT FAXED TO WILDEN OR SUBMITTED ONLINE VIA THE PSGDOVER.COM WEBSITE

WILDEN PUMP & ENGINEERING, LLC

PSG

22069 Van Buren St., Grand Terrace, CA 92313-5607

P: [phone]

• F: [phone]

wildenpump.com

Where Innovation Flows

PSG® reserves the right to modify the information and illustrations contained in this document without prior notice. This is a non-contractual document. 11-2018

Authorized PSG Representative:

Copyrigh t ©2018, PSG®, A Dover Compa ny

W IL- 10 18 3 -E- 03

REPLACES WIL-10183-E-02