Wilden P400, PX400 Engineering, Operation & Maintenance

EOM

Engineering

Operation &

Maintenance

P400/PX400

Plastic Pump

Where Innovation Flows

www.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

A. P400 Plastic Performance Curves

Rubber-Fitted ....................................................... 6

TPE-Fitted .......................................................... 6

Reduced-Stroke PTFE-Fitted .......................................... 7

Full-Stroke PTFE-Fitted ............................................... 7

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

B. PX400 Plastic Performance

Operating Principle ....................................................10

How to Use this EMS Curve .............................................11

Perf orman c e Cur ve s

Rubber-Fitted ....................................................14

TPE-Fitted .......................................................15

Reduced-Stroke PTFE-Fitted ........................................16

Full-Stroke PTFE-Fitted ............................................17

Suction-Lift Curves ....................................................18

SECTION 6 SUGGESTED INSTALLATION, OPERATION & TROUBLESHOOTING ......19

SECTION 7 DISASSEMBLY / REASSEMBLY ........................................22

Pro-Flo® Air Valve / Center Section Disassembly ...............................25

Pro-Flo X

Reassembly Hints & Tips ..................................................30

TM

Air Valve / Center Section Disassembly .............................28

SECTION 8 EXPLODED VIEW & PARTS LISTING

P400 Plastic .............................................................32

PX400 Plastic ...........................................................34

SECTION 9 ELASTOMER OPTIONS ................................................36

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 lub rication will reduce pump perfor mance.
Pump is pre-lubed.

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 with EPDM-backed

SIPD PTFE with Neoprene-backed
PTFE
Viton

1

4°C to 104°C 40°F to 220°F

®

FKM –40°C to 177°C –40°F to 350°F

4°C to 137°C 40°F to 280°F

4°C to 93°C 40°F to 200°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: Viton® 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: Do not exceed 8.6 bar (125 psig) air

supply pressure.

CAUTION: Do not exceed 82°C (180°F) air inlet

temperature for Pro-Flo X™ models.

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 PFTE diaphragms, it is

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

NOTE: PVDF 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 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: Pro-Flo® pumps cannot be used in

submersible applications. Pro-Flo X™ is available
in both single-point exhaust (submersible) and
standard (non-submersible) options. Do not use
standard Pro-Flo X™ models in submersible
applications. Turbo-Flo™ pumps are also
available in a single-point exhaust (submersible)
configuration.

CAUTION: The process fluid and cleaning fluids

CAUTION : Tighten all hardware prior to installation.

must be chemically compatible with all wetted

pump components. Consult Chemical Resistance

Guide.

WIL-11240-E-05 1 WILDEN PUMP & ENGINEERING, LLC

Section 2

WILDEN PUMP DESIGNATION SYSTEM

P400/PX400
PLASTIC

38 mm (1-1/2") Pump
Maximum Flow Rate:
450 lpm (119 gpm)

LEGEND

PX400 / XXXXX / XXX / XX / XXX / XXXX

MODEL

MATERIAL CODES

MODEL

P400 = PRO‑FLO
PX400 = PRO‑FLO X™

WETTED PARTS & OUTER PISTON

KK = PVDF / PVDF
KZ = PVDF / NO OUTER PISTON
PP = POLYPROPYLENE /

POLYPROPYLENE

PZ = POLYPROPYLENE / NO

OUTER PISTON

AIR CHAMBERS

P = POLYPROPYLENE

CENTER BLOCK

P = POLYPROPYLENE

AIR VALVE

P = POLYPROPYLENE

®

DIAPHRAGMS

VALVE BALLS

AIR VALVE

CENTER BLOCK

AIR CHAMBERS

WETTED PARTS & OUTER PISTON

DIAPHRAGMS

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

[Hytrel® (Cream)]

FWL = SANITARY WIL‑FLEX™,

IPD

FWS = SANITARY WIL‑FLEX™,

EZ‑INSTALL [Santoprene®

(Two Orange Dots)]
NES = NEOPRENE (Green Dot)
PUS = POLYURETHANE (Clear)
TEU = PTFE W/EPDM
BACK‑UP (White)
TNU = PTFE W/NEOPRENE
BACK‑UP (White)
TSS = FULL STROKE PTFE
W/SANIFLEX™ BACK‑UP
TSU = PTFE W/SANIFLEX™

BACK‑UP (White)
TWS = FULL STROKE PTFE

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

(Orange Dot)]
ZGS = GEOLAST®, EZ‑INSTALL
ZPS = POLYURETHANE,

EZ‑INSTALL
ZSS = SANIFLEX™, EZ‑INSTALL
ZWL = WIL‑FLEX™, INTEGRAL

PISTON
ZWS = WIL‑FLEX™, EZ‑INSTALL

O-RINGS

VALVE SE ATS

VALVE BALLS

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

FW = SANITARY WIL‑FLEX™

NE = NEOPRENE (Green Dot)
PU = POLYURETHANE (Clear)
TF = PTFE (White)
VT = VITON® (White Dot)
WF = WIL‑FLEX™ [Santoprene®

VALVE SEATS

K = PVDF
P = POLYPROPYLENE

VALVE SEAT O-RINGS

BN = BUNA‑N
TV = PTFE ENCAP. VITON
WF = WIL‑FLEX™ (Santoprene®)

SPECIALT Y
CODE

(if applicable)

[Hytrel® (Cream)]

[Santoprene® (Two Orange
Dots)]

(Orange Dot)]

®

SPECIALTY CODES

0100 Wil‑Gard II™ 110V
0102 Wil‑Gard II™, sensor wires ONLY
0103 Wil‑Gard II™ 220V
0320 Single‑point exhaust
0502 PFA‑coated hardware
0504 DIN flange
0506 DIN flange, PFA coated hardware
0604 DIN flange Wil‑Gard II™ 220V

NOTE: Most elastomeric materials use colored dots for identification.

Viton® is a registered trademark of DuPont Dow Elastomers.

WILDEN PUMP & ENGINEERING, LLC 2 WIL-11240-E-05

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
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.

®

patented air distribution system incorporates two

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 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.

WIL-11240-E-05 3 WILDEN PUMP & ENGINEERING, LLC

Section 4

DIMENSIONAL DRAWINGS

P400 Polypropylene

DIMENSIONS

ITEM METRIC (mm) STANDARD (inch)

A 476 18.8
B 81 3.2
C 348 13.7
D 602 23.7
E 665 26.2
F 677 26.6
G 131 5.2
H 138 5.4
J 300 11.8
K 351 13.8

L 324 12.8
M 268 10.6
N 208 8.2

P 176 6.9

R 12 0.5

S 91 3.6

DIN FL ANGE

T 110 DIA. 4.3 DIA.

U 150 DIA. 5.9 DIA.

V 18 DIA. 0.7 DIA.

ANSI FLANGE

T 98 DIA. 3.9 DIA.

U 127 DIA. 5.0 DIA.

V 16 DIA. 0.6 DIA.

LW0324 REV. A

P400 PVDF

DIMENSIONS

ITEM METRIC (mm) STANDARD (inch)

A 471 18.5

B 83 3.2

C 345 13.6

D 596 23.4

E 659 25.9

F 670 26.4

G 130 5.1

H 137 5.4

J 300 11.8

K 348 13.7

L 319 12.6
M 264 10.4
N 205 8.1

P 174 6.9

R 12 0.5

S 91 3.6

DIN FL ANGE

T 110 DIA. 4.3 DIA.

U 149 DIA. 5.9 DIA.

V 18 DIA. 0.7 DIA.

ANSI FLANGE

T 98 DIA. 3.9 DIA.

U 126 DIA. 5.0 DIA.

V 16 DIA. 0.6 DIA.

LW0325 REV. A

WILDEN PUMP & ENGINEERING, LLC 4 WIL-11240-E-05

DIMENSIONAL DRAWINGS

PX400 Polypropylene

DIMENSIONS

ITEM METRIC (mm) STANDARD (inch)

A 476 18.8
B 82 3.2
C 348 13.7
D 602 23.7
E 665 26.2
F 677 26.6
G 131 5.2
H 48 1.9
J 138 5.4
K 320 12.6

L 411 16.2
M 356 14.0
N 324 12.8

P 268 10.6

R 176 6.9

S 208 8.2

T 12 0.5

DIN FL ANGE

U 110 DIA. 4.3 DIA.

V 150 DIA. 5.9 DIA.

W 18 DIA. 0.7 DIA.

ANSI FLANGE

U 98 DIA. 3.9 DIA.

V 127 DIA. 5.0 DIA.

W 16 DIA. 0.6 DIA.

LW0326 REV. A

PX400 PVDF

DIMENSIONS

ITEM METRIC (mm) STANDARD (inch)

A 471 18.5

B 83 3.2

C 345 13.6

D 596 23.4

E 659 25.9

F 670 26.4

G 130 5.1

H 48 1.9

J 137 5.4

K 320 12.6

L 411 16.2
M 351 13.8
N 319 12.6

P 264 10.4

R 174 6.9

S 205 8.1

T 12 0.5

DIN FL ANGE

U 110 DIA. 4.3 DIA.

V 149 DIA. 5.9 DIA.

W 18 DIA. 0.7 DIA.

ANSI FLANGE

U 98 DIA. 3.9 DIA.

V 126 DIA. 5.0 DIA.

W 16 DIA. 0.6 DIA.

LW0327 REV. A

WIL-11240-E-05 5 WILDEN PUMP & ENGINEERING, LLC

Section 5A

PERFORMANCE

P400 PLASTIC

RUBBER-FITTED

Ship Weight .......Polypropylene 19 kg (41 lb)

PVDF 27 kg (59 lb)

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

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

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

Suction Lift ....................... 5.5 m Dry (18.2')

9.0 m Wet (29.5')

Disp. per Stroke1 .............. 1.25 L (0.330 gal)

Max. Flow Rate ............ 454 lpm (120 gpm)

Max. Size Solids ................... 6.4 mm (1/4")

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 227 lpm (60 gpm)
against a discharge head pressure of 5.0
bar (73 psig) requires 6.9 bar (100 psig)
and 136 Nm3/h (80 scfm) air consumption.

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

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.

P400 PLASTIC
TPE-FITTED

Ship Weight .......Polypropylene 19 kg (41 lb)

PVDF 27 kg (59 lb)

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

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

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

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

9.3 m Wet (30.6')

Disp. per Stroke1 ............ 1.34 L (0.353 gal)

Max. Flow Rate ............ 454 lpm (120 gpm)

Max. Size Solids .................... 6.4 mm (1/4")

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 151 lpm (40 gpm)
against a discharge head pressure of 4.3
bar (63 psig) requires 5.5 bar (80 psig) and
68 Nm3/h (40 scfm) air consumption.

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

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 WIL-11240-E-05

PERFORMANCE

P400 PLASTIC

REDUCED-STROKE PTFE-FITTED

Ship Weight .......Polypropylene 19 kg (41 lb)

PVDF 27 kg (59 lb)

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

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

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

Suction Lift ....................... 3.3 m Dry (10.8')

9.7 m Wet (31.8')
Disp. per Stroke

Max. Flow Rate .............. 318 lpm (84 gpm)

Max. Size Solids .................... 6.4 mm (1/4")

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 178 lpm (47 gpm)
against a discharge head pressure of 3.4
bar (50 psig) requires 5.5 bar (80 psig) and
136 Nm3/h (80 scfm) air consumption.

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

1

............ 0.59 L (0.155 gal)

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.

P400 PLASTIC
FULL-STROKE PTFE-FITTED

Ship Weight .... Polypropylene 19 kg (41 lb)

PVDF 27 kg (59 lb)

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

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

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

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

9.3 m Wet (30.6’)
Disp. Per Stroke

Max. Flow Rate ...........424 lpm (111.9 gpm)

Max. Size Solids ....................6.4 mm (1/4”)

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 337 lpm (89 gpm)
against a discharge head of 1.4 bar (20
psig) requires 5.5 bar (80 psig) and 147
Nm³/h (93 scfm) air consumption.

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

1

....................1.1 L (.30 gal)

20[34]

40[68]

60[102]

80[136]

100[170]

10 20 30 40 50 60 70 80 90 100 110 120

[38] [76] [114] [151] [189] [227] [265] [303] [341] [379] [416] [454]

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.

WIL-11240-E-05 7 WILDEN PUMP & ENGINEERING, LLC

SUCTION-LIFT CURVES

P400 PLASTIC
SUCTION-LIFT
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 WIL-11240-E-05

PX400

P L A S T I C

PX400 PERFORMANCE

Section 5B

Pro-Flo X

The Pro-Flo X™ air distribution system with the

revolutionary Efficiency Management System (EMS)

offers flexibility never before seen in the world of

AODD pumps. The

EMS is simple and

easy to use. With the

turn of an integrated

control dial, the

TM

Operating Principle

operator can select the optimal balance of flow and

efficiency that best meets the application needs.

Pro-Flo X™ provides higher performance, lower

operational costs

and flexibility that

exceeds previous

industry standards.

AIR CONSUMPTION

$

$

$

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

WILDEN PUMP & ENGINEERING, LLC 10 PX400 Performance

Each dial setting
represents an
entirely different
flow curve.

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

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

When the air
consumption
decreases more
than the flow
rate, efficiency
is improved and
operating costs
are reduced.