Dover Wilden Pro-Flo P4 Series, Wilden Pro-Flo PX4 Series Engineering, Operation & Maintenance

P4/PX4

Original™ Series PLASTIC Pumps

Engineering
Operation &
Maintenance

Simplify your process

WIL-10161- E-01

TABLE OF CONTENTS

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

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

SECTION 3 HOW IT WORKS (PUMP & AIR SYSTEMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

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

SECTION 5 PERFORMANCE

A. P4 PLASTIC Performance Curves

Rubber-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

TPE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

PTFE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Suction Lift Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

B. PX4 PLASTIC Performance

Operating Principal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

How to Use this EMS Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Performance Curves

Rubber-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

TPE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

PTFE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Suction Lift Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

SECTION 6 SUGGESTED INSTALLATION, OPERATION & TROUBLESHOOTING . . . . . 16

SECTION 7 DISASSEMBLY/REASSEMBLY

A. Pump Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

B. Pro-Flo® Air Valve / Center Section Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

C. Pro-Flo X

D. Reassembly Hints & Tips. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

E. PTFE Gasket Kit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

TM

Air Valve / Center Section Disassembly . . . . . . . . . . . . . . . . . . . . . . . . 24

SECTION 8 EXPLODED VIEW/PARTS LISTING

P4 PLASTIC

Rubber/TPE-Fitted, 3-Piece Center Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

PTFE-Fitted, 3-Piece Center Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

1-Piece Center Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

PX4 PLASTIC

Rubber/TPE-Fitted, 3-Piece Center Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

PTFE-Fitted, 3-Piece Center Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

SECTION 9 ELASTOMER OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

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.

TEMPERATURE LIMITS:

Polypropylene 0°C to 79°C 32°F to 175°F
PVDF –12°C to 107°C 10°F to 225°F
PTFE PFA 7°C to 107°C 20°F to 225°F
Neoprene –17.7°C to 93.3°C 0°F to 200°F
Buna-N –12.2°C to 82.2°C 10°F to 180°F
EPDM –51.1°C to 137.8°C –60°F to 280°F
Viton® –40°C to 176.7°C –40°F to 350°F
Wil-Flex™ –40°C to 107.2°C –40°F to 225°F
Sanifl ex™ –28.9°C to 104.4°C –20°F to 220°F
Polyurethane –12.2°C to 65.6°C 10°F to 150°F
PTFE 4.4°C to 104.4°C 40°F to 220°F
Tetra-Flex™ PTFE 4.4°C to 107.2°C 40°F to 225°F

CAUTION: When choosing pump materials, be
sure to check the temperature limits for all wetted
components. Example: Viton
limit of 176.7°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 signifi cantly reduce maximum safe
operating temperatures. Consult engineering
guide for chemical compatibility and temperature
limits.

®

has a maximum

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

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 fl uid
to fl ow 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 fi lter. A
5µ (micron) air fi lter is recommended.

NOTE: When installing PTFE diaphragms, it is
important to tighten outer pistons simultaneously
(turning in opposite directions) to ensure
tight fi t.

NOTE: P4 PVDF and PFA pumps come standard
from the factory with expanded PTFE gaskets
installed in the diaphragm bead of the liquid
chamber, in the T-section and in the ball and seat
area. PTFE gaskets cannot be re-used. Consult
PS-TG for installation instructions during
reassembly.

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: Always wear safety glasses when
operating pump. If diaphragm rupture occurs,
material being pumped may be forced out air
exhaust.

Plastic series pumps are made of virgin plastic

and are not UV stabilized. Direct sunlight for
prolonged periods can cause deterioration of
plastics.

WARNING: Prevention of static sparking — If
static sparking occurs, fi re or explosion could
result. Pump, valves, and containers must be
grounded when handling fl ammable fl uids and
whenever discharge of static electricity is a
hazard.

WIL-10161-E-01 1 WILDEN PUMP & ENGINEERING, LLC

CAUTION: The P4 Plastic pump is not
submersible. If your application requires your
pump to be submersed, the PX4 model can be
used.

CAUTION: Pumps should be fl ushed thoroughly
with water before installation into process line.

CAUTION: Tighten all hardware prior to
installation.

Section 2

WILDEN PUMP DESIGNATION SYSTEM

P4/PX4 ORIGINAL™
PLASTIC

38 mm (1-1/2") Pump
Maximum Flow Rate:
352 lpm (93 gpm)

MATERIAL CODES

MODEL

P4 = PRO-FLO
PX4 = PRO-FLO X

WETTED PARTS & OUTER PISTON

KK = PVDF / PVDF
PP = POLYPROPYLENE /

AIR CHAMBER/CENTER SECTION

A = ALUMINUM
C = PTFE COATED ALUMINUM
L = ACETAL (P4 Only)
S = STAINLESS STEEL (PX4 Only)

CENTER BLOCK / CENTER SECTION

L = ACETAL (P4 Only)
P = POLYPROPYLENE

AIR VALVE

L = ACETAL (P4 Only)
P = POLYPROPYLENE

LEGEND

In the case where a center section is used instead of a center block, air chambers, and air valve,

®

TM

POLYPROPYLENE

P4 / XXXXX / XXX / XX / XXX / XXXX

MODEL

VALVE BALLS

DIAPHRAGMS

AIR VALVE

CENTER BLOCK OR CENTER SECTION

AIR CHAMBERS OR CENTER SECTION

WETTED PARTS & OUTER PIS TON

the designation will be as follows: Polypropylene = PPP, Acetal = LLL

DIAPHRAGMS

BNS = BUNA-N (Red Dot)
EPS = EPDM (Blue Dot)
FSS = SANIFLEX™

[Hytrel® (Cream)]
NES = NEOPRENE (Green Dot)
PUS = POLYURETHANE (Clear)
TEU = PTFE W/EPDM
BACK-UP (White)
TSU = PTFE W/SANIFLEX™

BACK-UP (White)
VTS = VITON® (White Dot)
WFS = WIL-FLEX™ [Santoprene®

(Orange Dot)]
TNU = PTFE w/Neoprene back-up

(white)

O-RINGS

VALVE SEAT

VALVE BALL

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

FV = SANITARY VITON®
(Two White Dots)
NE = NEOPRENE (Green Dot)
PU = POLYURETHANE (Brown)
TF = PTFE (White)
VT = VITON® (White Dot)
WF = WIL-FLEX™ [Santoprene®

VALVE SEAT

K = PVDF
P = POLYPROPYLENE
T = PTFE PFA

VALVE SEAT O-RING

BN = BUNA-N
PU = POLYURETHANE (Brown)
TV = PTFE ENCAP. VITON

SPECIALTY
CODE

(if applicable)

[Hytrel® (Cream)]

(Orange Dot)]

®

SPECIALTY CODES

0100 Wil-Gard II™ 110V
0102 Wil-Gard II™ sensor wires ONLY
0103 Wil-Gard II™ 220V
0206 PFA coated hardware,

Wil-Gard II™ sensor wires ONLY
0502 PFA coated hardware
0504 DIN flange
0506 DIN flange, PFA coated hardware
0512 Adapter block, no muffler,Pro-Flo

center section

NOTE: MOS T ELASTOMERIC M ATERIALS USE COLORED DOTS FOR IDENTIFICAT ION.

®

is a registered trademark of DuPont Dow Elastomers.

Viton

®

,

0513 SS outer pistons
0560 Split manifold
0561 Split manifold, PFA coated hardware
0563 Split manifold, discharge ONLY
0564 Split manifold, inlet ONLY
0603 PFA coated hardware, Wil-Gard II™ 110V
0604 DIN flange, Wil-Gard II™ 220V
0606 DIN flange, PFA coated hardware,

Wil-Gard II™ 220V

0608 PFA coated hardware, Wil-Gard II™ 220V

WILDEN PUMP & ENGINEERING, LLC 2 WIL-10161-E-01

0612 Ultrapure, PFA coated hardware,

male connections

0618 Ultrapure, PFA coated hardware,

Wil-Gard II™ 110V, male connections
0622 Ultrapure, male connections
0624 Ultrapure, Wil-Gard II™ 110V, male connections
0660 Split manifold, Wil-Gard II™ 110V
0661 Split manifold PFA coated hardware,

Wil-Gard II™ 110V

Section 3

HOW IT WORKS—PUMP

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

OUTLET

OUTLET

OUTLET

CLOSED

BA

OPEN

INLET

OPEN

CLOSED

Right Stroke Mid Stroke Left Stroke

FIGURE 1 The air valve directs pressurized

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, balancing the
load and removing mechanical stress from
the diaphragm. The compressed air moves
the diaphragm away from the center block
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 the atmosphere
through the exhaust port of the pump.
The movement of diaphragm B toward the
center block of the pump creates a vacuum
within chamber B. Atmospheric pressure
forces fl uid into the inlet manifold forcing
the inlet valve ball off its seat. Liquid is free
to move past the inlet valve ball and fi ll the
liquid chamber (see shaded area).

OPEN

BA

CLOSED

INLET

CLOSED

OPEN

FIGURE 2 When the pressurized
diaphragm, diaphragm A, reaches the
limit of its discharge stroke, the air valve
redirects pressurized air to the back
side of diaphragm B. The pressurized air
forces diaphragm B away from the center
block while pulling diaphragm A to the
center block. 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 fl uid to fl ow through the pump
discharge. The movement of diaphragm
A toward the center block of the pump
creates a vacuum within liquid chamber A.
Atmospheric pressure forces fl uid into the
inlet manifold of the pump. The inlet valve
ball is forced off its seat allowing the fl uid
being pumped to fi ll the liquid chamber.

OPEN

BA

CLOSED

INLET

CLOSED

OPEN

FIGURE 3 At completion of the stroke, the
air valve again redirects air to the back side
of diaphragm A, which starts diaphragm
B on its exhaust stroke. As the pump
reaches its original starting 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.

HOW IT WORKS—AIR DISTRIBUTION SYSTEM

MUFFLER PLATE

MAIN SHAFT

PILOT
SPOOL

CENTER BLOCK

WIL-10161-E-01 3 WILDEN PUMP & ENGINEERING, LLC

SMALL END

MUFFLER

AIR VALVE SPOOL

LARGE END

END CAP

Figure 1

The Pro-Flo® patented air distribution system incorporates
three moving parts: the air valve spool, the pilot spool, and
the main shaft/diaphragm assembly. The heart of the system
is the air valve spool and air valve. As shown in Figure 1, this
valve design incorporates an unbalanced spool. The smaller
end of the spool is pressurized continuously, while the large
end is alternately pressurized and exhausted to move the
spool. The spool directs pressurized air to one chamber
while exhausting the other. The air causes the main shaft/
diaphragm assembly to shift to one side — discharging liquid on
one side and pulling liquid in on the other side. When the shaft
reaches the end of its stroke, it actuates the pilot spool, which
pressurizes and exhausts the large end of the air valve spool. The
pump then changes direction and the same process occurs in the
opposite direction, thus reciprocating the pump.

Section 4

DIMENSIONAL DRAWINGS

P4 Plastic

DIMENSIONS

ITEM METRIC (mm) STANDARD (inch)

A 394 15.5
B 79 3.1
C 287 11.3
D 465 18.3
E 528 20.8
F 122 4.8
G 287 11.3
H 300 11.8
J 137 5.4
K 287 11.3

L 236 9.3
M 180 7.1
N 203 8.0

P 10 0.4

DIN FLANGE
R 109 DIA. 4.3 DIA.
S 150 DIA. 5.9 DIA.
T 18 DIA. .7 DIA.

ANSI FLANGE
R 99 DIA. 3.9 DIA.
S 127 DIA. 5.0 DIA.
T 15 DIA. .6 DIA.

PX4 Plastic

DIMENSIONS

ITEM METRIC (mm) STANDARD (inch)

A 394 15.5
B 79 3.1
C 287 11.3
D 465 18.3
E 528 20.8
F 122 4.8
G 295 11.6
H 137 5.4
J 320 12.6
K 411 16.2

L 287 11.3
M 236 9.3
N 180 7.1

P 204 8.0

R10 .4

DIN FLANGE
S 109 DIA. 4.3 DIA.
T 150 DIA. 5.9 DIA.
U 18 DIA. .7 DIA.

ANSI FLANGE
S 99 DIA. 3.9 DIA.
T 127 DIA. 5.0 DIA.
U 15 DIA. .6 DIA.

WILDEN PUMP & ENGINEERING, LLC 4 WIL-10161-E-01

Section 5

PERFORMANCE

P4 PLASTIC

RUBBER-FITTED

Height .................................528 mm (20.8")

Width ..................................394 mm (15.5")

Depth .................................. 300 mm (11.8")

Est. Ship Weight .. Polypropylene 16.8 kg (37 lbs)
PVDF 21.3 kg (47 lbs)

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

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

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

Suction Lift .......................4.88 m Dry (16')

7.92 m Wet (26')
Displacement per

Stroke .......................... 1.19 l (0.314 gal.)

Max. Flow Rate ............. 348 lpm (92 gpm)

Max. Size Solids .............. 0.4 8 mm (3/16")

1

Displacement per stroke was calculated
at 4.8 bar (70 psig) air inlet pressure
against a 2 bar (30 psig) head pressure.

Example: To pump 159 lpm (40 gpm)
against a discharge pressure head of 2.7
bar (40 psig) requires 4.1 bar (60 psig) and

30.6 Nm3/h (18 scfm) air consumption.
(See dot on chart.)

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

1

Flow rates indicated on chart were determined by pumping water.

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

P4 PLASTIC

TPE-FITTED

Height .................................528 mm (20.8")

Width ..................................394 mm (15.5")

Depth .................................. 300 mm (11.8")

Est. Ship Weight .. Polypropylene 16.8 kg (37 lbs)
PVDF 21.3 kg (47 lbs)

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

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

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

Suction Lift .......................3.96 m Dry (13')

7.92 m Wet (26')
Displacement per

Stroke .......................... 1.18 l (0.311 gal.)

Max. Flow Rate ............. 354 lpm (94 gpm)

Max. Size Solids .............. 0.4 8 mm (3/16")

1

Displacement per stroke was calculated
at 4.8 bar (70 psig) air inlet pressure
against a 2 bar (30 psig) head pressure.

Example: To pump 42 gpm (159 lpm)
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.
(See dot on chart.)

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

1

Flow rates indicated on chart were determined by pumping water.

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

WIL-10161-E-01 5 WILDEN PUMP & ENGINEERING, LLC

PERFORMANCE

P4 PLASTIC

PTFE-FITTED

Height ................................. 528 mm (20.8")

Width .................................. 394 mm (15.5")

Depth ...................................300 mm (11.8")

Est. Ship Weight .....Polypropylene 16.8 kg (37 lbs)

PVDF 21.3 kg (47 lbs)
PTFE PFA 23.9 kg (52 lbs)

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

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

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

Suction Lift ................. 3.05 m Dry (10' Dry)

7.47 m Wet (24.5')
Displacement per

Stroke ......................... 0.53 l (0.139 gal.)

Max. Flow Rate .............. 261 lpm (69 gpm)

Max. Size Solids ................ 0.48 mm (3/16")

1

Displacement per stroke was calculated at

4.8 bar (70 psig) air inlet pressure against
a 2 bar (30 psig) head pressure.

Example: To pump 125 lpm (33 gpm)
against a discharge pressure head of 2.7
bar (40 psig) requires 4 bar (58 psig) and
45 Nm3/h (27 scfm) air consumption. (See
dot on chart.)

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

1

Flow rates indicated on chart were determined by pumping water.

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

SUCTION LIFT CURVES

P4 PLASTIC SUCTION
LIFT CAPABILITY

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

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

BAR

WILDEN PUMP & ENGINEERING, LLC 6 WIL-10161-E-01

PTFE

PX4

P L A S T I C

PX4 PERFORMANCE

Section 5B

Pro-Flo X

The Pro-Flo X™ air distribution system with the

revolutionary Effi ciency Management System (EMS)

offers fl exibility never before seen in the world of

AODD pumps. The

patent-pending EMS

is simple and easy

to use. With the

turn of an integrated

TM

Operating Principal

control dial, the operator can select the optimal

balance of fl ow and effi ciency that best meets the

application needs. Pro-Flo X™ provides higher

performance, lower

operational costs

and fl exibility that

exceeds previous

industry standards.

AIR CONSUMPTION

$

$

$

Turning the dial
changes the
relationship
between air inlet
and exhaust
porting.

WILDEN PUMP & ENGINEERING, LLC 8 PX4 Performance

Each dial setting
represents an
entirely different
fl ow curve

Pro-Flo X™ pumps
are shipped from
the factory on
setting 4, which
is the highest
fl ow rate setting
possible

Moving the dial
from setting 4
causes a decrease
in fl ow and an even
greater decrease in
air consumption.

When the air
consumption
decreases more
than the fl ow
rate, effi ciency
is improved and
operating costs
are reduced.

Example 1

HOW TO USE THIS EMS CURVE

SETTING 4 PERFORMANCE CURVE

Figure 1 Figure 2

Example data point = Example data point =

This is an example showing how to determine fl ow rate and
air consumption for your Pro-Flo X™ pump using the Effi cien­cy Management System (EMS) curve and the performance
curve. For this example we will be using 4.1 bar (60 psig) inlet
air pressure and 2.8 bar (40 psig) discharge pressure and EMS
setting 2.

Step 1:

Identifying performance at setting 4. Locate

the curve that represents the fl ow rate of the
pump with 4.1 bar (60 psig) air inlet pressure.
Mark the point where this curve crosses the
horizontal line representing 2.8 bar (40 psig)
discharge pressure. (Figure 1). After locating
your performance point on the fl ow curve,
draw a vertical line downward until reaching
the bottom scale on the chart. Identify the fl ow
rate (in this case, 8.2 gpm). Observe location
of performance point relative to air consump­tion curves and approximate air consumption
value (in this case, 9.8 scfm).

8.2

GPM

curve, draw vertical lines downward until
reaching the bottom scale on the chart. This
identifi es the fl ow X Factor (in this case, 0.58)
and air X Factor (in this case, 0.48).

Step 3:

Calculating performance for specific EMS

setting. Multiply the fl ow rate (8.2 gpm)

obtained in Step 1 by the fl ow X Factor multi­plier (0.58) in Step 2 to determine the fl ow rate
at EMS setting 2. Multiply the air consump­tion (9.8 scfm) obtained in Step 1 by the air
X Factor multiplier (0.48) in Step 2 to deter­mine the air consumption at EMS setting 2
(Figure 3).

8.2

gpm

.58

4.8

gpm

0.58

0.48

(fl ow rate for Setting 4)

(Flow X Factor setting 2)

(Flow rate for setting 2)

EMS CURVE

fl ow multiplier

air multiplier

Step 2:

Determining flow and air X Factors. Locate
your discharge pressure (40 psig) on the verti­cal axis of the EMS curve (Figure 2). Follow
along the 2.8 bar (40 psig) horizontal line until
intersecting both fl ow and air curves for your
desired EMS setting (in this case, setting 2).
Mark the points where the EMS curves inter­sect the horizontal discharge pressure line.
After locating your EMS points on the EMS

PX4 Performance 9 WILDEN PUMP & ENGINEERING, LLC

9.8

scfm

(air consumption for setting 4)

.48

4.7

Figure 3

The fl ow rate and air consumption at Setting
2 are found to be 18.2 lpm (4.8 gpm) and 7.9
Nm3/h (4.7 scfm) respectively.

(Air X Factor setting 2)

scfm

(air consumption for setting 2)

HOW TO USE THIS EMS CURVE

Example 2.1

SETTING 4 PERFORMANCE CURVE

Figure 4

Example data point =

This is an example showing how to determine the inlet air
pressure and the EMS setting for your Pro-Flo X™ pump to
optimize the pump for a specifi c application. For this exam­ple we will be using an application requirement of 18.9 lpm
(5 gpm) fl ow rate against 2.8 bar (40 psig) discharge pressure.
This example will illustrate how to calculate the air consump­tion that could be expected at this operational point.

10.2

gpm

DETERMINE EMS SETTING

Step 1

: Establish inlet air pressure. Higher air pres-

sures will typically allow the pump to run
more effi ciently, however, available plant air
pressure can vary greatly. If an operating
pressure of 6.9 bar (100 psig) is chosen when

EMS Flow

Settings 1 & 2

0.49

In our example it is 38.6 lpm (10.2 gpm). This

is the setting 4 fl ow rate. Observe the loca­tion of the performance point relative to air
consumption curves and approximate air
consumption value. In our example setting
4 air consumption is 24 Nm3/h (14 scfm).
See fi gure 4.

Step 3

: Determine flow X Factor. Divide the required

fl ow rate 18.9 lpm (5 gpm) by the setting 4 fl ow
rate 38.6 lpm (10.2 gpm) to determine the fl ow
X Factor for the application.

5

gpm / 10.2 gpm = 0.49 (flow X Factor)

EMS CURVE

Figure 5

fl ow multiplier

plant air frequently dips to 6.2 bar (90 psig)

Step 4

pump performance will vary. Choose an oper­ating pressure that is within your compressed
air system's capabilities. For this example we
will choose 4.1 bar (60 psig).

: Determine EMS setting from the flow

X Factor. Plot the point representing the fl ow

X Factor (0.49) and the application discharge
pressure 2.8 bar (40 psig) on the EMS curve.
This is done by following the horizontal 2.8

Step 2

: Determine performance point at setting 4. For

this example an inlet air pressure of 4.1 bar
(60 psig) inlet air pressure has been chosen.
Locate the curve that represents the perfor­mance of the pump with 4.1 bar (60 psig) inlet
air pressure. Mark the point where this curve
crosses the horizontal line representing 2.8
bar (40 psig) discharge pressure. After locat­ing this point on the fl ow curve, draw a verti­cal line downward until reaching the bottom
scale on the chart and identify the fl ow rate.

bar (40 psig) psig discharge pressure line until
it crosses the vertical 0.49 X Factor line. Typi­cally, this point lies between two fl ow EMS
setting curves (in this case, the point lies be­tween the fl ow curves for EMS setting 1 and

2). Observe the location of the point relative
to the two curves it lies between and approxi­mate the EMS setting (fi gure 5). For more pre­cise results you can mathematically interpo­late between the two curves to determine the
optimal EMS setting.

For this example the EMS setting is 1.8.

WILDEN PUMP & ENGINEERING, LLC 10 PX4 Performance

HOW TO USE THIS EMS CURVE

Example 2.2

SETTING 4 PERFORMANCE CURVE

Figure 6

Example data point =

10.2

gpm

Determine air consumption at a specific
EMS setting.

Step 1

: Determine air X Factor. In order to determine

the air X Factor, identify the two air EMS set­ting curves closest to the EMS setting estab­lished in example 2.1 (in this case, the point lies
between the air curves for EMS setting 1 and

2). The point representing your EMS setting
(1.8) must be approximated and plotted on the
EMS curve along the horizontal line represent­ing your discharge pressure (in this case, 40
psig). This air point is different than the fl ow
point plotted in example 2.1. After estimating
(or interpolating) this point on the curve, draw
a vertical line downward until reaching the
bottom scale on the chart and identify the air
X Factor (fi gure 7).

EMS CURVE

EMS Air

Settings 1 & 2

Figure 7

Example data point =

Step 2

: Determine air consumption. Multiply your

setting 4 air consumption (14 scfm) value by
the air X Factor obtained above (0.40) to deter­mine your actual air consumption.

1

4 scfm x 0.40 = 5.6 SCFM

In summary, for an application requiring 18.9 lpm
(5 gpm) against 2.8 bar (40 psig) discharge pressure,
the pump inlet air pressure should be set to 4.1 bar
(60 psig) and the EMS dial should be set to 1.8. The
pump would then consume 9.5 Nm3/h (5.6 scfm) of
compressed air.

0.40

air multiplier

For this example the air X Factor is 0.40

PX4 Performance 11 WILDEN PUMP & ENGINEERING, LLC

EMS CURVE

PERFORMANCE

/h (54 scfm)

3

of air when run at 5.5 bar (80 psig) air inlet pressure and 2.8 bar (40

psig) discharge pressure (See dot on performance curve).

The end user did not require that much fl ow and wanted to reduce

air consumption at his facility. He determined that EMS setting 1

would meet his needs. At 2.8 bar (40 psig) discharge pressure and

EXAMPLE

A PX4 polypropylene, rubber-fi tted pump operating at EMS setting

4, achieved a fl ow rate of 216 lpm (57 gpm) using 92 Nm

EMS setting 1, the fl ow “X factor” is 0.35 and the air “X factor” is

/h (12 scfm). The fl ow rate was reduced by 65% while

3

0.22 (see dots on EMS curve).

Multiplying the original setting 4 values by the “X factors” provides

the setting 1 fl ow rate of 76 lpm (20 gpm) and an air consumption

of 20 Nm

the air consumption was reduced by 78%, thus providing increased

effi ciency.

For a detailed example for how to set your EMS, see beginning of

performance curve section.

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

The Effi ciency Management System (EMS)

can be used to optimize the performance of

your Wilden pump for specifi c applications.

The pump is delivered with the EMS adjusted

to setting 4, which allows maximum fl ow.

The EMS curve allows the pump user to

determine fl ow and air consumption at

each EMS setting. For any EMS setting and

discharge pressure, the “X factor” is used

as a multiplier with the original values from

the setting 4 performance curve to calculate

the actual fl ow and air consumption values

for that specifi c EMS setting. Note: you can

interpolate between the setting curves for

operation at intermediate EMS settings.

1

SETTING 4 PERFORMANCE CURVE

Displacement per stroke was calculated at 4.8 bar (70 psig)

TECHNICAL DATA

Height . . . . . . . . . . . . . . . . . . . . . . . . . .528 mm (20.8”)

Width. . . . . . . . . . . . . . . . . . . . . . . . . . .394 mm (15.5”)

Depth. . . . . . . . . . . . . . . . . . . . . . . . . . .320 mm (12.6”)

Ship Weight . . . . . . . . Polypropylene 17 kg (37 lbs.)

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

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

Outlet. . . . . . . . . . . . . . . . . . . . . . . . . . . 38 mm (1 1/2”)

Suction Lift . . . . . . . . . . . . . . . . . . . . .5.7 m Dry (18.7’)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.6 m Wet (28.4’)

Disp. Per Stroke. . . . . . . . . . . . . . . . 1.19 l (0.28 gal.)

Max. Flow Rate . . . . . . . . . . . . . . . .363 lpm (96 gpm)

PX4 PLASTIC RUBBER-FITTED

WILDEN PUMP & ENGINEERING, LLC 12 PX4 Performance

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

air inlet pressure against a 2.1 bar (30 psig)head pressure.

1

The Effi ciency Management System (EMS) can be used to optimize the performance of your Wilden pump for

specifi c applications. The pump is delivered with the EMS adjusted to setting 4, which allows maximum fl ow.

EMS CURVE

PERFORMANCE

/h (88 scfm)

3

EXAMPLE

A PX4 polypropylene, TPE-fi tted pump operating at EMS setting 4,

achieved a fl ow rate of 288 lpm (76 gpm) using 150 Nm

of air when run at 6.9 bar (100 psig) air inlet pressure and 2.1 bar (30

psig) discharge pressure (See dot on performance curve).

The end user did not require that much fl ow and wanted to reduce

air consumption at his facility. He determined that EMS setting 3

would meet his needs. At 2.1 bar (30 psig) discharge pressure and

EMS setting 3, the fl ow “X factor” is 0.91 and the air “X factor” is

0.83 (see dots on EMS curve).

/h (73 scfm). The fl ow rate was reduced by 9% while the

3

air consumption was reduced by 17%, thus providing increased ef-

fi ciency.

For a detailed example for how to set your EMS, see beginning of

performance curve section.

Multiplying the original setting 4 values by the “X factors” provides

the setting 3 fl ow rate of 262 lpm (69 gpm) and an air consumption

of 124 Nm

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

The Effi ciency Management System (EMS)

can be used to optimize the performance of

your Wilden pump for specifi c applications.

The pump is delivered with the EMS adjusted

to setting 4, which allows maximum fl ow.

The EMS curve allows the pump user to

determine fl ow and air consumption at

each EMS setting. For any EMS setting and

discharge pressure, the “X factor” is used

as a multiplier with the original values from

the setting 4 performance curve to calculate

the actual fl ow and air consumption values

for that specifi c EMS setting. Note: you can

interpolate between the setting curves for

operation at intermediate EMS settings.

1

SETTING 4 PERFORMANCE CURVE

Displacement per stroke was calculated at 4.8 bar (70 psig)

TECHNICAL DATA

Height . . . . . . . . . . . . . . . . . . . . . . . . . .528 mm (20.8”)

Width. . . . . . . . . . . . . . . . . . . . . . . . . . .394 mm (15.5”)

Depth. . . . . . . . . . . . . . . . . . . . . . . . . . .320 mm (12.6”)

Ship Weight . . . . . . . . Polypropylene 17 kg (37 lbs.)

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

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

Outlet. . . . . . . . . . . . . . . . . . . . . . . . . . . 38 mm (1 1/2”)

Suction Lift . . . . . . . . . . . . . . . . . . . . .4.8 m Dry (15.9’)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.2 m Wet (30.1’)

Disp. Per Stroke. . . . . . . . . . . . . . . . . 1.1 l (0.29 gal.)

Max. Flow Rate . . . . . . . . . . . . . . . .363 lpm (96 gpm)

PX4 PLASTIC TPE-FITTED

PX4 Performance 13 WILDEN PUMP & ENGINEERING, LLC

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

air inlet pressure against a 2.1 bar (30 psig)head pressure.

1

The Effi ciency Management System (EMS) can be used to optimize the performance of your Wilden pump for

specifi c applications. The pump is delivered with the EMS adjusted to setting 4, which allows maximum fl ow.

EMS CURVE

PERFORMANCE

/h (57 scfm)

3

EXAMPLE

A PX4 polypropylene, PTFE-fi tted pump operating at EMS setting 4,

achieved a fl ow rate of 178 lpm (47 gpm) using 97 Nm

of air when run at 4.1 bar (60 psig) air inlet pressure and 1.4 bar (20

psig) discharge pressure (See dot on performance curve).

The end user did not require that much fl ow and wanted to reduce

air consumption at his facility. He determined that EMS setting 2

would meet his needs. At 1.4 bar (20 psig) discharge pressure and

EMS setting 2, the fl ow “X factor” is 0.71 and the air “X factor” is

0.51 (see dots on EMS curve).

/h (29 scfm). The fl ow rate was reduced by 29% while the

3

air consumption was reduced by 49%, thus providing increased ef-

fi ciency.

For a detailed example for how to set your EMS, see beginning of

performance curve section.

Multiplying the original setting 4 values by the “X factors” provides

the setting 2 fl ow rate of 126 lpm (33 gpm) and an air consumption

of 49 Nm

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

The Effi ciency Management System (EMS)

can be used to optimize the performance of

your Wilden pump for specifi c applications.

The pump is delivered with the EMS adjusted

to setting 4, which allows maximum fl ow.

The EMS curve allows the pump user to

determine fl ow and air consumption at

each EMS setting. For any EMS setting and

discharge pressure, the “X factor” is used

as a multiplier with the original values from

the setting 4 performance curve to calculate

the actual fl ow and air consumption values

for that specifi c EMS setting. Note: you can

interpolate between the setting curves for

operation at intermediate EMS settings.

1

SETTING 4 PERFORMANCE CURVE

Displacement per stroke was calculated at 4.8 bar (70 psig)

TECHNICAL DATA

Height . . . . . . . . . . . . . . . . . . . . . . . . . .528 mm (20.8”)

Width. . . . . . . . . . . . . . . . . . . . . . . . . . .394 mm (15.5”)

Depth. . . . . . . . . . . . . . . . . . . . . . . . . . .320 mm (12.6”)

Ship Weight . . . . . . . . Polypropylene 17 kg (37 lbs.)

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

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

Outlet. . . . . . . . . . . . . . . . . . . . . . . . . . . 38 mm (1 1/2”)

Suction Lift . . . . . . . . . . . . . . . . . . . . . .2.1 m Dry (6.8’)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.2 m Wet (30.1’)

Disp. Per Stroke. . . . . . . . . . . . . . . . . 0.5 l (0.13 gal.)

Max. Flow Rate . . . . . . . . . . . . . . . .276 lpm (73 gpm)

PX4 PLASTIC PTFE-FITTED

WILDEN PUMP & ENGINEERING, LLC 14 PX4 Performance

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

air inlet pressure against a 2.1 bar (30 psig)head pressure

1

The Effi ciency Management System (EMS) can be used to optimize the performance of your Wilden pump for

specifi c applications. The pump is delivered with the EMS adjusted to setting 4, which allows maximum fl ow.

SUCTION LIFT CURVES

PX4 PLASTIC SUCTION

METER FT H20

LIFT CAPABILITY

PSIG

[BAR]

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

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

PX4 Performance 15 WILDEN PUMP & ENGINEERING, LLC

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 fl ex 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 fi ttings
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
fl oor. Multiple installations with confl icting 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 six 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
fi lter, and regulator. The use of an air fi lter 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 fi gure by the
displacement per stroke.

MUFFLER: Sound levels are reduced below OSHA
specifi cations using the standard Wilden muffl er. Other

muffl ers 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 effi ciency 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 fi ttings 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 fi ttings.

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 specifi cs.

When pumps are installed in applications involving fl ooded
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 effi cient
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.

SUBMERSIBLE APPLICATIONS: Pro-Flo X™ pumps can be
used for submersible applications, when using the Pro-Flo
X™ single-point-exhaust option.

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.

®

WILDEN PUMP & ENGINEERING, LLC 16 WIL-10161-E-01

)

SUGGESTED INSTALLATION

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-off
valve should be located far enough away from
the pumping equipment such that it can be
reached safely in an emergency situation.

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

WIL-10161-E-01 17 WILDEN PUMP & ENGINEERING, LLC

SUGGESTED OPERATION & MAINTENANCE

OPERATION: The P4 and PX4 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 ASSEMBLY/DISASSEMBLY INSTRUCTIONS.

Pump discharge rate can be controlled by limiting the
volume and/or pressure of the air supply to the pump
(preferred method). An air regulator is used to regulate
air pressure. A needle valve is used to regulate 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 fl ow 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” situation and can be restarted by reducing

the fl uid discharge pressure or increasing the air inlet
pressure. The Wilden P4 and PX4 pumps run solely on
compressed air and do not generate heat, therefore
your process fl uid 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 fl uid 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.

TROUBLESHOOTING

Pump will not run or runs slowly.

1. Ensure that the air inlet pressure is at least 0.4 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 fi lter for debris (see recommended
installation).

3. Check for extreme air leakage (blow by) which 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 which 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 which will cause the air
valve spool to be unable to shift.

7. Remove plug from pilot spool exhaust.

Pump runs but little or no product fl ows.

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

2. Verify that vacuum required to lift 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
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.

Pump air valve freezes.

1. Check for excessive moisture in compressed air. Either
install a dryer or hot air generator for compressed
air. Alternatively, a coalescing fi lter 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 8C.)

3. Check tightness of clamp bands and integrity of o-rings
and seals, especially at intake manifold.

4. Ensure pipe connections are airtight.

Product comes out air exhaust.

1. Check for diaphragm rupture.

2. Check tightness of outer pistons to shaft.

WILDEN PUMP & ENGINEERING, LLC 18 WIL-10161-E-01

Section 7A

PUMP DISASSEMBLY

Tools Required:

• 1/2" Wrench

• Adjustable Wrench

• Vise equipped with
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 fl uid to fl ow into a suitable container. Be aware of
any hazardous effects of contact with your process fl uid.

The Wilden P4 and PX4 have a 38 mm (1-1/2") inlet and outlet and are designed
for maximum fl ow. Its air distribution system is based on a revolutionary design
which increases reliability and performance. The model P4 and PX4 are available in
injection molded polypropylene, PTFE PFA and PVDF wetted parts.

NOTE: The model used for these instructions incorporates rubber diaphragms, balls,
and seats. Models with PTFE diaphragms, balls and seats are the same except where
noted.

TK TK

Step 1. Figure 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.

WIL-10161-E-01 19 WILDEN PUMP & ENGINEERING, LLC

Step 2. Figure 2

Utilizing a 1/2" wrench, remove the
two small clamp bands that fasten
the discharge manifold to the liquid
chambers.

Step 3. Figure 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. Figure 4

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

Step 6. Figure 6

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

Step 7. Figure 7

Remove valve seats and valve balls
for inspection. Replace if necessary.

Step 5. Figure 5

Remove the two small clamp bands which fasten the
intake manifold to the liquid chambers.

Step 8. Figure 8

Remove small manifold clamp
bands to inspect manifold o-rings.

WILDEN PUMP & ENGINEERING, LLC 20 WIL-10161-E-01

PUMP DISASSEMBLY

Step 9. Figure 9

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

Step 10. Figure 10

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

Step 11. Figure 11

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

Step 12. Figure 12

NOTE: Due to varying 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 (Figure 12). 2) The outer piston, diaphragm and inner piston
separate from the shaft which remains connected to the opposite side
diaphragm assembly (Figure 13). 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.

WIL-10161-E-01 21 WILDEN PUMP & ENGINEERING, LLC

Figure 13

Step 13. Figure 14

To remove diaphragm assembly from
shaft, secure shaft with soft jaws (a
vise fi tted 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.

Section 7B

PRO-FLO® AIR DISTRIBUTION SYSTEM (ADS) DISASSEMBLY

Tools Required:

• 3/16" Hex Head
Wrench

• 1/4" Hex Head Wrench

• Snap Ring Pliers

• O-Ring Pic

AIR VALVE DISASSEMBLY:

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 fl uid to fl ow into a suitable container. Be aware of
hazardous effects of contact with your process fl uid.

®

The Wilden Plastic P4 and PX4 utilize a revolutionary Pro-Flo
A 13 mm (1/2") [19 mm (3/4") for PX4] air inlet connects the air supply to the center
section. Proprietary composite seals reduce the co effi cient of friction and allow the
P4 / PX4 to run lube-free. Constructed of polypropylene or Acetal (P4 Only), the
Pro-Flo® air distri bution system is designed to perform in on/off, non-freezing, non­stalling, tough duty applications.

air distribution system.

Step 2. Figure 2

Remove muffl er plate and air valve
bolts from air valve assembly
exposing muffl er gasket for
inspection. Replace if necessary.

Step 3. Figure 3

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

Step 1. Figure 1

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

Step 4. Figure 4

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

WILDEN PUMP & ENGINEERING, LLC 22 WIL-10161-E-01

PRO-FLO® AIR DISTRIBUTION SYSTEM (ADS) DISASSEMBLY

Step 5. Figure 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: Seals should not be remove
from assembly. Seals are not sold
separately.

Step 6. Figure 6

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

Step 7. Figure 7

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

A

Step 8. Figure 8

Remove pilot spool bushing from
center block.

WIL-10161-E-01 23 WILDEN PUMP & ENGINEERING, LLC

Step 9. Figure 9

With o-ring pick, gently remove the o­ring from the opposite side of the “center
hole” cut on 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 “center cut” side
fi rst, this end incorporates the urethane
o-ring and will be damaged as it slides
over the ports cut in the sleeve.

NOTE: Seals should not be removed
from pilot spool. Seals are not sold
separately.

Step 10. Figure 10

Check center block Glyd™ rings for
signs of wear. If necessary, remove
Glyd™ rings with o-ring pick and
replace.

NOTE: Threaded sleeves (see A —
Figure 10) are removable and can be
replaced if necessary. Sleeves can
be press fi t by hand.

Section 7C

Step 1. Figure 1

Loosen the air valve bolts using a 3/16"
hex wrench.

PRO-FLO X™ AIR DISTRIBUTION SYSTEM (ADS) DISASSEMBLY

Step 2. Figure 2

Remove air valve bolts, muffl er plate,
and air valve assembly exposing
muffl er gasket and air valve gasket.
Replace if necessary.

Step 3. Figure 3

Remove air valve end cap to expose
the large end of air valve spool by
simply lifting up on the air valve
end cap once the bolts have been
removed.

Step 4. Figure 4

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: Seals should not be remove
from assembly. Seals are not sold
separately.

WILDEN PUMP & ENGINEERING, LLC 24 WIL-10161-E-01

Step 5. Figure 5

Remove pilot spool retaining snap
ring on both sides of the center
section using snap ring pliers.

Step 6-6A. Figure 6

Remove the air chamber bolts using
a 1/4" hex wrench.

Step 7. Figure 7

Remove the air chamber and inspect
air chamber gaskets (2). Replace if
necessary.

PRO-FLO X™ AIR DISTRIBUTION SYSTEM (ADS) DISASSEMBLY

Step 8. Figure 8

Remove the pilot spool from the
center section.

Step 9. Figure 9

With o-ring pick, gently remove the o­ring from the opposite side of the “center
hole” cut on 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 “center cut” side
fi rst, this end incorporates the urethane
o-ring and will be damaged as it slides
over the ports cut in the sleeve.

NOTE: Seals should not be removed
from pilot spool. Seals are not sold

separately.

Step 10. Figure 10

Once the air chambers have been
removed, the square air valve nuts
(6) may be removed or replaced if
necessary.

WIL-10161-E-01 25 WILDEN PUMP & ENGINEERING, LLC

Step 11. Figure 11

Remove and inspect the shaft
bushings (2) replace if necessary.

Step 12. Figure 12

Inspect center block Glyd rings (2)
for wear. If replacement is necessary,
use an o-ring pick to remove the
used Glyd rings then replace with
genuine Wilden replacement parts.

Section 7D

REASSEMBLY HINTS & TIPS

ASSEMBLY:

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 fi rst, then
the diaphragms and fi nally the wetted path. Please fi nd
the applicable torque specifi cations 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 bushing to

ensure no damage is done to new Glyd™ ring seals.

• A small amount NLGI grade 2 white EP bearing grease

can be applied to the muffl er and air valve gaskets to
locate gaskets during assembly.

• Make sure that the exhaust port on the muffl er 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.

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 needle

• With a new seal in hand, place the two legs of the

• Open the pliers as wide as the seal diameter will allow,

• Lightly clamp the pliers together to hold the seal into

• With the seal clamped in the pliers, insert the seal into

• After the pliers are removed, you will notice a slight

GLYD™ RING INSTALLATION:

PRE-INSTALLATION

• Once all of the old seals have been removed, the inside

of the groove should be cleaned to ensure no debris
is left that may cause premature damage to the new
seals.

MAXIMUM TORQUE SPECIFICATIONS

Description of Part Plastic Pumps

Air Valve 5.1 N•m (45 ft-lbs)

Outer Piston 47.5 N•m (35 ft-lbs)

Small Clamp Band 9.6 N•m (85 in-lbs)

Large Clamp Band (Rubber-Fitted) 18.6 N•m (165 in-lbs)

Large Clamp Band (PTFE-Fitted) 18.6 N•m (165 in-lbs)

Air Chamber Screws (HSFHS 3/8"-16)

P4 47.5 N•m (35 in-lbs) / PX4 27.1 N•m (20 ft-lbs)

Figure A

• Lubricate the edge of the shaft with NLGI grade 2 white

• Slowly insert the center shaft with a rotating motion.

• Perform these steps for the remaining seal.

Figure B

nose pliers (heat shrink tubing may also be used). This
is done to prevent damaging the inside surface of the
new seal.

needle nose pliers inside the seal ring. (See Figure A.)

then with two fi ngers pull down on the top portion of
the seal to form kidney bean shape. (See Figure B.)

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.

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.

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 fi nger. With either the side
of the screwdriver or your fi nger, apply light pressure
to the peak of the bump. This pressure will cause the
bump to be almost completely eliminated.

EP bearing grease.

This will complete the resizing of the seal.

NEEDLE NOSE

PLIERS

GLYD™ RING

WILDEN PUMP & ENGINEERING, LLC 26 WIL-10161-E-01

TAPE

Section 7E

GASKET KIT INSTALLATION

Only P4 PVDF pumps come standard with expanded
PTFE Gasket Kits (P/N 04-9501-99). Carefully prepare
sealing surfaces by removing all debris and foreign
matter from diaphragm bead and all mating surfaces.

Step 1. Figure 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. Figure 2

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

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

Step 3. Figure 3

The ends of the tape should overlap
approximately 13 mm (1/2").

Proceed to install the PTFE tape on
the remaining liquid chamber.

Step 4. Figure 4

Carefully remove the protective covering from the back
of the PTFE gasket attached to tape.

Step 6. Figure 6

Center the gasket so that it evenly covers the o-ring
and seat areas.

WIL-10161-E-01 27 WILDEN PUMP & ENGINEERING, LLC

Step 5. Figure 5

Install the valve ball, valve seat and o-ring.

Step 7. Figure 7

Gently apply pressure to gasket to ensure the adhesive
maintains a positive seal to stay in place during pump
assembly.

Section 8

EXPLODED VIEW AND PART LISTINGS

P4 PLASTIC

RUBBER/TPE-FITTED/3-PIECE CENTER SECTION EXPLODED VIEW

WILDEN PUMP & ENGINEERING, LLC 28 WIL-10161-E-01

EXPLODED VIEW AND PART LISTINGS

P4 PLASTIC

No. Part Description Qty.

1 Pro-Flo® Air Valve Assembly

RUBBER/TPE-FITTED/3-PIECE CENTER SECTION PARTS LISTING

P4/PPAPP

P/N

1

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

P4/KKAPP

P/N

P4/PPCPP/0502

P/N

P4/KKCPP/0502

P/N

2 O-Ring (-225), End Cap (1.859" x .139") 1 04-2390-52-700 04-2390-52-700 04-2390-52-700 04-2390-52-700
3 End Cap, Pro-Flo

®

1 04-2330-20-700 04-2330-20-700 04-2330-20-700 04-2330-20-700
4 Screw, HHC, Air Valve (1/4" x 4.5") 4 01-6000-03 01-6000-03 01-6000-05 01-6000-05
5 Screw, SHCS, 10-16 x 1 3/4" 2 04-6351-03 04-6351-03 04-6351-05 04-6351-05
6 Muffler 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 Block Assembly 1 04-3110-20 04-3110-20 04-3110-20 04-3110-20

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"-20 4 00-6505-03 00-6505-03 00-6505-05 00-6505-05
12 Sleeve, Threaded, Pro-Flo® Center Block 4 04-7710-08 04-7710-08 04-7710-08 04-7710-08

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

14 Shaft, Pro-Flo

®

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

15 Glyd™ Ring 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 04-3651-01 04-3651-05 04-3651-05

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

21 Diaphragm 2 * * * *

22 Outer Piston 2 04-4550-20-500 04-4550-21-500 04-4550-20-500 04-4550-21-500

23 Valve Seat 4 04-1120-20-500 04-1120-21-500 04-1120-20-500 04-1120-21-500
24 Valve Seat, O-Ring (2.609" x .139") 4 * * * *
25 Valve Ball 4 * * * *

26 Chamber, Liquid 2 04-5000-20 04-5000-21 04-5000-20 04-5000-21
27 Large Clamp Band Assy. 2 04-7300-03-500 04-7300-03-500 04-7300-05-500 04-7300-05-500
28 Small Clamp Band Assy. 8 04-7100-03-500 04-7100-03-500 04-7100-05-500 04-7100-05-500
29 Manifold, Discharge Elbow 2 04-5230-20 04-5230-21 04-5230-20 04-5230-21
30 Manifold, Inlet Elbow 2 04-5220-20 04-5220-21 04-5220-20 04-5220-21
31 Manifold, Tee Section 2 04-5160-20 04-5160-21 04-5160-20 04-5160-21
32 Carriage Bolt, Large Clamp Band (5/16"-18 RHSN) 4 04-6070-03 04-6070-03 04-6070-05 04-6070-05
33 Hex Nut, Large Clamp Band (5/16"-18) 4 08-6400-03 08-6400-03 08-6400-05 08-6400-05
34 Carriage Bolt, Small Clamp Band (1/4"-20 RHSN) 16 08-6050-03-500 08-6050-03-500 08-6050-05-500 08-6050-05-500
35 Hex Nut, Small Clamp Band (1/4"-20) 16 08-6400-03 08-6400-03 08-6400-05 08-6400-05
36 Tee Section O-Ring (2.734" x .139") 4 * * * *
37 Muffler (Not shown) 1 04-3510-99 04-3510-99 04-3510-99 04-3510-99
38 Pilot Spool Retaining O-Ring 2 04-2650-49-700 04-2650-49-700 04-2650-49-700 04-2650-49-700

1

Air Valve Assembly includes item numbers 2 and 3.
DIN Flange: Polypropylene = P/N 04-5160-20-504 PVDF = P/N 04-5160-21-504
0502 Specialty Code = PFA-Coated Hardware
*Refer to elastomer chart in Section 10.

All boldface items are primary wear parts.

WIL-10161-E-01 29 WILDEN PUMP & ENGINEERING, LLC

EXPLODED VIEW AND PART LISTINGS

P4 PLASTIC

PTFE-FITTED/3-PIECE CENTER SECTION EXPLODED VIEW

WILDEN PUMP & ENGINEERING, LLC 30 WIL-10161-E-01

EXPLODED VIEW AND PART LISTINGS

P4 PLASTIC

No. Part Description Qty.

1

Pro-Flo® Air Valve Assembly*

2

O-Ring (-225), End Cap (1.859" x .139")

3

End Cap, Pro-Flo

4

Screw, HHC, Air Valve (1/4" x 4.5")

5

Screw, SHCS, 10-16 x 1 3/4"

6

Muffl er Plate, Pro-Flo

7

Gasket, Muffl er Plate

8

Gasket, Air Valve

9

Center Block Assembly

10

Bushing, Reducer, NPT/BSP Combo

11

Nut, Square, 1/4"-20

12

Sleeve, Threaded, Pro-Flo® Center Block

13

Removable Pilot Sleeve Assembly

14

Shaft, Pro-Flo®

15

Glyd™ Ring

16

Gasket, Center Block, Pro-Flo

17

Air Chamber, Pro-Flo

18

Screw, HSFHS, 3/8"-16 x 1"

19

Retaining Ring

20

Inner Piston

21

Back-up Diaphragm

22

Diaphragm, PTFE

23

Outer Piston

24

Valve Seat

25

Valve Seat, O-Ring (2.609" x .139")

26

Valve Ball

27

Chamber, Liquid

28

Large Clamp Band Assy.

29

Small Clamp Band Assy.

30

Manifold, Discharge Elbow

31

Manifold, Inlet Elbow

32

Manifold, Tee Section

33

Carriage Bolt, Large Clamp Band (5/16"-18x2 1/2 RHSN)404-6070-03 04-6070-03 08-6070-03-500 04-6070-05 04-6070-05 08-6080-05-500

34

Hex Nut, Large Clamp Band (5/16"-18)

35

Carriage Bolt, Small Clamp Band (5/16-18x2 RHSN)

36

Hex Nut, Small Clamp Band (1/4"-20)

37

Tee Section O-Ring (2.734" x .139")

38

Muffl er (Not shown)

39

Pilot Spool Retaining O-Ring

*Air Valve Assembly includes item numbers 2 and 3.
DIN Flange: Polypropylene = P/N 04-5160-20-504 PVDF = P/N 04-5160-21-504
0502 Specialty Code = PFA-Coated Hardware

All boldface items are primary wear parts.

PTFE-FITTED/3-PIECE CENTER SECTION PARTS LISTING

P4/PPAPP

P/N

1

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

1

®

®

®

®

04-2390-52-700 04-2390-52-700 04-2390-52-700 04-2390-52-700 04-2390-52-700 04-2390-52-700

1

04-2330-20-700 04-2330-20-700 04-2330-20-700 04-2330-20-700 04-2330-20-700 04-2330-20-700

4

01-6000-03 01-6000-03 01-6000-03 01-6000-05 01-6000-05 01-6000-05

2

04-6351-03 04-6351-03 04-6351-03 04-6351-05 04-6351-05 04-6351-05

1

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

1

04-3500-52-700 04-3500-52-700 04-3500-52-700 04-3500-52-700 04-3500-52-700 04-3500-52-700

1

04-2600-52-700 04-2600-52-700 04-2600-52-700 04-2600-52-700 04-2600-52-700 04-2600-52-700

1

04-3110-20 04-3110-20 04-3110-20 04-3110-20 04-3110-20 04-3110-20

1

04-6950-20-700 04-6950-20-700 04-6950-20-700 04-6950-20-700 04-6950-20-700 04-6950-20-700

4

00-6505-03 00-6505-03 00-6505-03 00-6505-03 00-6505-03 00-6505-05

4

04-7710-08 04-7710-08 04-7710-08 04-7710-08 04-7710-08 04-7710-08

1

04-3880-99 04-3880-99 04-3880-99 04-3880-99 04-3880-99 04-3880-99

1

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

2

08-3210-55-225 08-3210-55-225 08-3210-55-225 08-3210-55-225 08-3210-55-225 08-3210-55-225

2

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

2

04-3651-01 04-3651-01 04-3651-01 04-3651-05 04-3651-05 04-3651-05

8

71-6250-08 71-6250-08 71-6250-08 71-6250-08 71-6250-08 71-6250-08

2

04-3890-03 04-3890-03 04-3890-03 04-3890-03 04-3890-03 04-3890-03

2

04-3750-01-700 04-3750-01-700 04-3750-01-700 04-3750-01-700 04-3750-01-700 04-3750-01-700

2

04-1060-51 04-1060-51 04-1060-51 04-1060-51 04-1060-51 04-1060-51

2

04-1010-55 04-1010-55 04-1010-55 04-1010-55 04-1010-55 04-1010-55

2

04-4600-20-500 04-4600-21-500 04-4600-22-500 04-4600-20-500 04-4600-21-500 04-4600-21-500

4

04-1120-20-500 04-1120-21-500 04-1120-22-500 04-1120-20-500 04-1120-21-500 04-1120-21-500

4

04-1200-60-500 04-1200-60-500 04-1200-60-500 04-1200-60-500 04-1200-60-500 04-1200-60-500

4

04-1080-55 04-1080-55 04-1080-55 04-1080-55 04-1080-55 04-1080-55

2

04-5000-20 04-5000-21 04-5000-22 04-5000-20 04-5000-21 04-5000-22

2

04-7300-03-500 04-7300-03-500 04-7305-03 04-7300-05-500 04-7300-05-500 04-7305-05

8

04-7100-03-500 04-7100-03-500 04-7105-03 04-7100-05-500 04-7100-05-500 04-7105-05

2

04-5230-20 04-5230-21 04-5230-22 04-5230-20 04-5230-21 04-5230-22

2

04-5220-20 04-5220-21 04-5220-22 04-5220-20 04-5220-21 04-5220-22

2

04-5160-20 04-5160-21 04-5160-22 04-5160-20 04-5160-21 04-5160-22

4

08-6400-03 08-6400-03 08-6450-03 08-6400-05 08-6400-05 08-6420-05

16

08-6050-03-500 08-6050-03-500 08-6050-03-500 08-6050-05-500 08-6050-05-500 08-6050-05-500

16

08-6400-03 08-6400-03 08-6400-03 08-6400-05 08-6400-05 08-6400-05

4

04-1300-60-500 04-1300-60-500 04-1300-60-500 04-1300-60-500 04-1300-60-500 04-1300-60-500

1

04-3510-99 04-3510-99 04-3510-99 04-3510-99 04-3510-99 04-3510-99

2

04-2650-49-700 04-2650-49-700 04-2650-49-700 04-2650-49-700 04-2650-49-700 04-2650-49-700

P4/KKAPP

P/N

P4/TTAPP

P/N

P4/PPCPP/0502

P/N

P4/KKCPP/0502

P/N

P4/TTCPP/0502

P/N

WIL-10161-E-01 31 WILDEN PUMP & ENGINEERING, LLC

EXPLODED VIEW AND PART LISTINGS

P4 PLASTIC

1-PIECE CENTER SECTION EXPLODED VIEW

WILDEN PUMP & ENGINEERING, LLC 32 WIL-10161-E-01

EXPLODED VIEW AND PART LISTINGS

P4 PLASTIC

1-PIECE CENTER SECTION PARTS LISTING

Rubber/TPE-Fitted PTFE-Fitted

No. Part Description Qty.

1 Pro-Flo

®

Air Valve Assembly

1

P4/PPLLL

P/N

1 04-2000-13-700 04-2000-13-700 04-2000-13-700 04-2000-13-700 04-2000-13-700

P4/KKLLL

P/N

P4/PPLLL

P/N

P4/KKLLL

P/N

P4/TTLLL

P/N

2 O-Ring (-225), End Cap (1.859" x .139") 1 04-2390-52-700 04-2390-52-700 04-2390-52-700 04-2390-52-700 04-2390-52-700
3 End Cap, Pro-Flo

®

1 04-2330-13-700 04-2330-13-700 04-2330-13-700 04-2330-13-700 04-2330-13-700
4 Screw, HHC, Air Valve (1/4" x 4.5") 4 01-6000-03 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 04-6351-03
6 Muffl er Plate, Pro-Flo

®

1 04-3180-13-700 04-3180-13-700 04-3180-13-700 04-3180-13-700 04-3180-13-700
7 Gasket, Muffl er Plate 1 04-3500-52-700 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 04-2600-52-700
9 Center Section Assembly 1 04-3150-13-700 04-3150-13-700 04-3150-13-700 04-3150-13-700 04-3150-13-700

10 Bushing, Reducer, NPT/BSP Combo 1 04-6950-13-700 04-6950-13-700 04-6950-13-700 04-6950-13-700 04-6950-13-700
11 Nut, Hex, 1/4"-20 4 04-6400-03 04-6400-03 04-6400-03 04-6400-03 04-6400-03

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

13 Shaft, Pro-Flo

®

1 04-3800-03-700 04-3800-03-700 04-3820-03-700 04-3820-03-700 04-3820-03-700
14 Glyd™ Ring 2 08-3210-55-225 08-3210-55-225 08-3210-55-225 08-3210-55-225 08-3210-55-225
15 Retaining Ring 2 04-3890-03 04-3890-03 04-3890-03 04-3890-03 04-3890-03
16 Inner Piston 2 04-3700-01-700 04-3700-01-700 04-3750-01-700 04-3750-01-700 04-3750-01-700

17 Back-up Diaphragm 2 N/R N/R 04-1060-51 04-1060-51 04-1060-51
18 Diaphragm 2 * * 04-1010-55 04-1010-55 04-1010-55

19 Outer Piston 2 04-4550-20-500 04-4550-21-500 04-4600-20-500 04-4600-21-500 04-4600-22-500

20 Valve Seat 4 04-1120-20-500 04-1120-21-500 04-1120-20-500 04-1120-21-500 04-7305-03
21 Valve Seat, O-Ring (2.609" x .139") 4 * * 04-1200-60-500 04-1200-60-500 04-7105-03
22 Valve Ball 4 * * 04-1080-55 04-1080-55 04-1080-55

23 Chamber, Liquid 2 04-5000-20 04-5000-21 04-5000-20 04-5000-21 04-5000-22
24 Large Clamp Band Assy. 2 04-7300-03-500 04-7300-03-500 04-7300-03-500 04-7300-03-500 04-7305-03
25 Small Clamp Band Assy. 8 04-7100-03-500 04-7100-03-500 04-7100-03-500 04-7100-03-500 04-7105-03
26 Manifold, Discharge Elbow 2 04-5230-20 04-5230-21 04-5230-20 04-5230-21 04-5230-22
27 Manifold, Inlet Elbow 2 04-5220-20 04-5220-21 04-5220-20 04-5220-21 04-5220-22
28 Manifold, Tee Section 2 04-5160-20 04-5160-21 04-5160-20 04-5160-21 04-5160-22
29 Carriage Bolt, Large Clamp Band (5/16"-18x2 1/2 RHSN) 4 04-6070-03 04-6070-03 04-6070-03 04-6070-03 08-6070-03-500
30 Hex Nut, Large Clamp Band (5/16"-18x2) 4 08-6400-03 08-6400-03 04-6400-03 08-6400-03 08-6450-03
31 Carriage Bolt, Small Clamp Band (5/16"-18x2 1/2 RHSN) 16 08-6050-03-500 08-6050-03-500 08-6050-03-500 08-6050-03-500 08-6050-03-500
32 Hex Nut, Small Clamp Band (5/16-18) 16 08-6400-03 08-6400-03 08-6400-03 08-6400-03 08-6400-03
33 Tee Section O-Ring (2.734" x .139") 4 * * 04-1300-60-500 04-1300-60-500 04-1300-60-500
34 Pilot Spool Retaining O-Ring 2 04-2650-49-700 04-2650-49-700 04-2650-49-700 04-2650-49-700 04-2650-49-700

Muffl er (Not shown) 1 04-3510-99 04-3510-99 04-3510-99 04-3510-99 04-3510-99

1

Air Valve Assembly includes item numbers 2 and 3.
DIN Flanges are available. Contact your distributor for part numbers.
For optional P4 Plastic Pump elastomers, see Section 10.
NOTE: Muffl er (P/N 04-3510-99) (not shown) is standard on all P4 pumps.
*See Section 10 — Elastomer Chart

All boldface items are primary wear parts.

WIL-10161-E-01 33 WILDEN PUMP & ENGINEERING, LLC

EXPLODED VIEW AND PART LISTINGS

PX4 PLASTIC

RUBBER/TPE-FITTED/3-PIECE CENTER SECTION EXPLODED VIEW

WILDEN PUMP & ENGINEERING, LLC 34 WIL-10161-E-01

EXPLODED VIEW AND PART LISTINGS

PX4 PLASTIC

Item Description Qty.

1 Pro-Flo X™ Assembly, Air Valve
2

O-Ring (-225), End Cap (Ø1.859” x Ø.139”)
3 End Cap 2
4

Screw, SHC, Air Valve (1/4”-20 x 4-1/2”)
5

Nut, Square (1/4”-20)
6 Muffl er Plate, Pro-Flo X™ 1

7

Gasket, Muffl er Plate, Pro-Flo X™
8

Gasket, Air Valve, Pro-Flo X™

9

Center Block Assembly, Pro-Flo X™

10

O-Ring (-210), Adjuster (Ø.734” x Ø.139”)

11

Sleeve, Threaded, Center Block

12 Pilot Spool Retaining O-Ring (Ø.204” x Ø.070”) 2

13

Removable Pilot Sleeve Assembly

14

Shaft Pro-Flo

15

Shaft Seal

16 Shaft Bushing 2
17 Gasket, Center Block Pro-Flo V™ 2

18

Air Chamber, Pro-Flo V™

19

Retaining Ring

20

Screw, Custom HSFCHC (3/8”-16 x 1.00”)

21

Inner Piston

22

Diaphragm

23

Outer Piston

24

Valve Seat

25

Valve Seat O-Ring (Ø2.609” x Ø.139”)

26

Valve Ball

27

Chamber, Liquid

28

Large Clamp Band Assy.

29

Small Clamp Band Assy.

30

Manifold, Discharge Elbow

31

Manifold, Inlet Elbow

32

Manifold, Tee Section

33

Carriage Bolt, RHSN (5/16”- 18 x 2.50”)

34

Hex Nut, Heavy (5/16”-18)

35

Carriage Bolt, RHSN (5/16”- 18 x 2.00”)

36

Tee Section O-Ring (Ø2.734” x Ø.139”)

Muffler 1” (not Shown)

®

RUBBER/TPE-FITTED/3-PIECE CENTER SECTION PARTS LISTING

1

2

PX4/PPAPP

P/N

1
2

6
6

1
1

1

1

4

1
1

2

2
2
8
2

2

2

4
4
4

2
2
8
2
2
2

4
20
16

4

1

08-2030-20 08-2030-20 08-2030-20 08-2030-20
04-2390-52-700 04-2390-52-700 04-2390-52-700 04-2390-52-700
04-2330-20-700 04-2330-20-700 04-2330-20-700 04-2330-20-700

01-6000-03 01-6000-03 01-6000-05 01-6000-05

00-6505-03 00-6505-03 00-6505-05 00-6505-05

08-3185-20 08-3185-20 08-3185-20 08-3185-20

08-3502-52 08-3502-52 08-3502-52 08-3502-52

08-2620-52 08-2620-52 08-2620-52 08-2620-52

08-3126-20 08-3126-20 08-3126-20 08-3126-20

02-3200-52 02-3200-52 02-3200-52 02-3200-52

04-7710-08 04-7710-08 04-7710-08 04-7710-08

04-2650-49-700 04-2650-49-700 04-2650-49-700 04-2650-49-700

04-3880-99 04-3880-99 04-3880-99 04-3880-99
04-3800-03-700 04-3800-03-700 04-3800-03-700 04-3800-03-700

08-3210-55-225 08-3210-55-225 08-3210-55-225 08-3210-55-225

08-3306-13 08-3306-13 08-3306-13 08-3306-13

04-3529-52 04-3529-52 04-3529-52 04-3529-52

04-3660-01 04-3660-01 04-3660-05 04-3660-05

04-3890-03 04-3890-03 04-3890-03 04-3890-03

71-6250-08 71-6250-08 71-6250-08 71-6250-08
04-3700-01-700 04-3700-01-700 04-3700-01-700 04-3700-01-700

****

04-4550-20-500 04-4550-21-500 04-4550-20-500 04-4550-21-500

04-1120-20-500 04-1120-21-500 04-1120-20-500 04-1120-21-500

****
****

04-5000-20 04-5000-21 04-5000-20 04-5000-21
04-7300-03-500 04-7300-03-500 04-7300-05-500 04-7300-05-500
04-7100-03-500 04-7100-03-500 04-7100-05-500 04-7100-05-500

04-5230-20 04-5230-21 04-5230-20 04-5230-21

04-5220-20 04-5220-21 04-5220-20 04-5220-21

04-5160-20 04-5160-21 04-5160-20 04-5160-21

04-6070-03 04-6070-03 04-6070-05 04-6070-05

08-6400-03 08-6400-03 08-6400-05 08-6400-05
08-6050-03-500 08-6050-03-500 08-6050-05-500 08-6050-05-500

****

15-3514-99 15-3514-99 15-3514-99 15-3514-99

PX4/KKAPP

P/N

PX4/PPCPP/ 0502

P/N

PX4/KKCPP/ 0502

P/N

1

Air Valve Assembly includes items 2 and 3.

2

Center Block Assembly includes items 10, 11, 15 and 16.
DIN Flange: Polypropylene = P/N 04-5160-20-504 PVDF=P/N 04-5160-21-504
0502 Specialty Code = PFA Coated Hardware
0504 Specialty Code = DIN Flange
*Refer to Elastomer Chart in Section 10

All boldface items are primary wear parts.

WIL-10161-E-01 35 WILDEN PUMP & ENGINEERING, LLC

EXPLODED VIEW AND PART LISTINGS

PX4 PLASTIC

PTFE-FITTED/3-PIECE CENTER SECTION EXPLODED VIEW

WILDEN PUMP & ENGINEERING, LLC 36 WIL-10161-E-01

EXPLODED VIEW AND PART LISTINGS

PX4 PLASTIC

Item Description Qty.

1 Pro-Flo X™ Assembly, Air Valve
2

O-Ring (-225), End Cap (Ø1.859” x Ø.139”)
3 End Cap 2
4

Screw, SHC, Air Valve (1/4”-20 x 4-1/2”)
5

Nut, Square (1/4”-20)
6 Muffl er Plate, Pro-Flo X™ 1

7

Gasket, Muffl er Plate, Pro-Flo X™
8

Gasket, Air Valve, Pro-Flo X™

9

Center Block Assembly, Pro-Flo X™

10

O-Ring (-210), Adjuster (Ø.734” x Ø.139”)

11

Sleeve, Threaded, Center Block

12 Pilot Spool Retaining O-Ring (Ø.204” x Ø.070”) 2
13

Removable Pilot Sleeve Assembly

14

Shaft, Pro-Flo® PTFE

15

Shaft Seal

16 Shaft Bushing 2
17 Gasket, Center Block Pro-Flo V™ 2

18

Air Chamber, Pro-Flo V™

19

Retaining Ring

20

Screw, Custom HSFCHC (3/8”-16 x 1.00”)

21

Inner Piston, PTFE

22

Diaphragm, Back-up

23

Diaphragm

24

Outer Piston

25

Valve Seat

26

Valve Seat O-Ring (Ø2.609” x Ø.139”)

27

Valve Ball

28

Chamber, Liquid

29

Large Clamp Band Assy.

30

Small Clamp Band Assy.

31

Manifold, Discharge Elbow

32

Manifold, Inlet Elbow

33

Manifold, Tee Section

34

Carriage Bolt, RHSN (5/16”- 18 x 2.50”)

35

Hex Nut, Heavy (5/16”-18)

36

Carriage Bolt, RHSN (5/16”- 18 x 2.00”)

37

Tee Section O-Ring (Ø2.734” x Ø.139”)

Muffler 1” (not Shown)

PTFE-FITTED/3-PIECE CENTER SECTION PARTS LISTING

1

2

PX4/PPAPP

P/N

1
2

6
6

1
1

1

1

4

1

1

2

2
2
8
2

2
2

2

4
4
4

2
2
8
2
2
2

4
20
16

4

1

08-2030-20 08-2030-20 08-2030-20 08-2030-20
04-2390-52-700 04-2390-52-700 04-2390-52-700 04-2390-52-700
04-2330-20-700 04-2330-20-700 04-2330-20-700 04-2330-20-700

01-6000-03 01-6000-03 01-6000-05 01-6000-05

00-6505-03 00-6505-03 00-6505-05 00-6505-05

08-3185-20 08-3185-20 08-3185-20 08-3185-20

08-3502-52 08-3502-52 08-3502-52 08-3502-52

08-2620-52 08-2620-52 08-2620-52 08-2620-52

08-3126-20 08-3126-20 08-3126-20 08-3126-20

02-3200-52 02-3200-52 02-3200-52 02-3200-52

04-7710-08 04-7710-08 04-7710-08 04-7710-08

04-2650-49-700 04-2650-49-700 04-2650-49-700 04-2650-49-700

04-3880-99 04-3880-99 04-3880-99 04-3880-99

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

08-3210-55-225 08-3210-55-225 08-3210-55-225 08-3210-55-225

08-3306-13 08-3306-13 08-3306-13 08-3306-13

04-3529-52 04-3529-52 04-3529-52 04-3529-52

04-3660-01 04-3660-01 04-3660-05 04-3660-05

04-3890-03 04-3890-03 04-3890-03 04-3890-03

71-6250-08 71-6250-08 71-6250-08 71-6250-08

04-3752-01 04-3752-01 04-3752-01 04-3752-01

04-1060-51 04-1060-51 04-1060-51 04-1060-51

04-1010-55 04-1010-55 04-1010-55 04-1010-55

04-4600-20-500 04-4600-21-500 04-4600-20-500 04-4600-21-500

04-1120-20-500 04-1120-21-500 04-1120-20-500 04-1120-21-500
04-1200-60-500 04-1200-60-500 04-1200-60-500 04-1200-60-500

04-1080-55 04-1080-55 04-1080-55 04-1080-55

04-5000-20 04-5000-21 04-5000-20 04-5000-21
04-7300-03-500 04-7300-03-500 04-7300-05-500 04-7300-05-500
04-7100-03-500 04-7100-03-500 04-7100-05-500 04-7100-05-500

04-5230-20 04-5230-21 04-5230-20 04-5230-21

04-5220-20 04-5220-21 04-5220-20 04-5220-21

04-5160-20 04-5160-21 04-5160-20 04-5160-21

04-6070-03 04-6070-03 04-6070-05 04-6070-05

08-6400-03 08-6400-03 08-6400-05 08-6400-05
08-6050-03-500 08-6050-03-500 08-6050-05-500 08-6050-05-500

04-1300-60-500 04-1300-60-500 04-1300-60-500 04-1300-60-500

15-3514-99 15-3514-99 15-3514-99 15-3514-99

PX4/KKAPP

P/N

PX4/PPCPP/ 0502

P/N

PX4/KKCPP/ 0502

P/N

1

Air Valve Assembly includes items 2 and 3.

2

Center Block Assembly includes items 10, 11, 15 and 16.
DIN Flange: Polypropylene = P/N 04-5160-20-504 PVDF=P/N 04-5160-21-504
0502 Specialty Code = PFA Coated Hardware
0504 Specialty Code = DIN Flange
*Refer to Elastomer Chart in Section 10

All boldface items are primary wear parts.

WIL-10161-E-01 37 WILDEN PUMP & ENGINEERING, LLC

Section 9

ELASTOMER OPTIONS

P4 & PX4 PLASTIC

MATERIAL

Neoprene 04-1010-51 04-1080-51 N/A N/A N/A
Buna-N 04-1010-52 04-1080-52 N/A 04-1200-52-500 04-1300-52-500

®

Viton
EPDM 04-1010-54 04-1080-54 N/A N/A N/A
PTFE 04-1010-55 04-1080-55 N/A N/A N/A
Tetra-Flex™ PTFE 04-1010-64 N/A N/A N/A N/A
PTFE PFA N/A N/A 04-1120-22-500 N/A N/A
PTFE Encap. (Viton®) N/A N/A N/A 04-1200-60-500 04-1300-60-500
Neoprene Backup 04-1060-51 N/A N/A N/A N/A
Polyurethane 04-1010-50 04-1080-50 N/A 04-1200-50-500 04-1300-50-500
Saniflex™ 04-1010-56 04-1080-56 N/A N/A N/A
Wil-Flex™ 04-1010-58 04-1080-58 N/A N/A N/A
Polypropylene N/A N/A 04-1120-20-500 N/A N/A
PVDF N/A N/A 04-1120-21-500 N/A N/A

1

Use Neoprene back-up diaphragms with PTFE diaphragms only.
NOTE: Sanifl ex™ back-up diaphragms, P/N 04-1060-56, are available upon request. Please consult your local distributor.
*Consult RBG P/S UF for Ultra-Flex™ information.

TRADITIONAL

DIAPHRAGMS (2) VALVE BALLS (4) VALVE SEATS (4)

04-1010-53 04-1080-53 N/A N/A N/A

VALVE SEAT
O-RINGS (4)

T-SECTION

O-RINGS (4)

WILDEN PUMP & ENGINEERING, LLC 38 WIL-10161-E-01

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 Country

Telephone Fa x E-mail Web Address

Number of pumps in facility? Number of Wilden pumps?

Types of pumps in facilit y (check all that apply): Diaphragm Centrifugal Gear Submersible Lobe

Other

Media being pumped?

How did you hear of Wilden Pump? Trade Journal

Other

ONCE COMPLETE, FAX TO [phone]

NOTE: WARRANT Y VOID IF PAGE IS NOT FA XED TO WILDEN

WILDEN PUMP & ENGINEERING, LLC

Trade Show Internet/E-mail Distributor