PSG Wilden HS430S Series Instruction Manual

EOM
ENGINEERING OPERATION
& MAINTENANCE
HS430S
High Pressure
Bolted Metal Pumps
WIL-11113-E-04
Where InnovationFlows

WIL-11113-E-04 Wilden®
2
Contents
Section 1: Precautions - Read First! 4
Section 2: Wilden Pump Designation System 5
Section 3: How It Works 6
Section 4: Dimensional Drawings 7
Section 5: Performance 8
HS430S Aluminum TP E -Fi t ted 8
HS430S Stainless Steel T P E-F itt e d 8
Su ction- L i ft Cur ves 9
Section 6: Suggested Installation, Operation, 10
Maintenance and Troubleshooting
Section 7: Disassembly / Reassembly 13
Pu mp Disassemb ly 13
Si ngle- Po int Ex haust 19
Rea ssemb ly H ints & Ti ps 20
Section 8: Exploded View and Parts List 21
HS430S M e tal 21

WIL-11113-E-04 Wilden®
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Copyright
Copyright 2018 PSG®, a Dover Company. All rights reserved.
PSG reserves the right to modify the information and illustrations in this document without prior notice. The
product described in this document is furnished under a license agreement or nondisclosure agreement. No
part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or any
means electronic or mechanical, including photocopying and recording, without the written permission of PSG,
a Dover Company, except as described by the terms of those agreements.
This is a non-contractual document. 01-2019.
Trademarks
PSG and the PSG logo are registered trademarks of PSG. Wilden® is a registered trademark of PSG
California LLC. Pro-Flo® SHIFT and Pro-Flo® are registered trademarks of PSG California LLC. Wil-Flex® is a
trademark of PSG California LLC. Saniflex™ is a trademark of PSG California LLC.
All trademarks, names, logos and service marks (collectively "trademarks") in this document are registered
and unregistered trademarks of their respective owners. Nothing contained in this document should be
construed as granting any license or right to use any trademark without the prior written permission of the
trademark owner.
Warranty
Each and every product manufactured by Wilden is built to meet the highest standards of quality. Every pump
is functionally tested to insure integrity of operation. Wilden 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.
For more information, and to register your Wilden pump for warranty, please visit
https://www.psgdover.com/wilden/support/warranty-registration.
Certifications

WIL-11113-E-04 Wilden®
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Precautions - Read First!
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
4°C to 137°C
40°F to 280°F
SIPD PTFE with Neoprene-
backed
4°C to 93°C
40°F to 200°F
PTFE 1
4°C to 104°C
40°F to 220°F
FKM
–40°C to 177°C
–40°F to 350°F
Wil-Flex™
–40°C to 107°C
–40°F to 225°F
Acetal
–29°C to 82°C
–20°F to 180°F
14°C to 149°C (40°F to 300°F) - 13 mm (1/2") and 25 mm (1") models only.
NOTE: Not all materials are available for all models. Refer to Section 2 for
material options for your pump.
CAUTION: When choosing pump materials, be sure to
check the temperature limits for all wetted components.
Example: FKM has a maximum limit of 177°C (350°F) but
polypropylene has a maximum limit of only 79°C (175°F).
CAUTION: Maximum temperature limits are based upon
mechanical stress only. Certain chemicals will significantly
reduce maximum safe operating temperatures. Consult
Chemical Resistance Guide for chemical compatibility and
temperature limits.
WARNING: Prevention of 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 (100 psi) air
supply pressure.
CAUTION: All piping, valves, gauges and other
components installed on the liquid discharge must have
a minimum pressure rating of 20 .7 bar (300 psig).
CAUTION: The discharge pressure generated by this
pump is 3X the inlet pressure supplied.
CAUTION: The process fluid and cleaning fluids must be
chemically compatible with all wetted pump components.
Consult Chemical Resistance Guide.
CAUTION: Pumps should be thoroughly flushed before
installing into process lines. FDA- and USDA-approved
pumps should be cleaned and/ or sanitized before
being used.
CAUTION: Always wear safety glasses when operating
pump. If diaphragm rupture occurs, material being
pumped may be forced out air exhaust.
CAUTION: Before any maintenance or repair is
attempted, the compressed air line to the pump should
be disconnected and all air pressure allowed to bleed
from pump. Disconnect all intake, discharge and air lines.
Drain the pump by turning it upside down and allowing
any fluid to flow into a suitable container.
CAUTION: Blow out air line for 10 to 20 seconds
before attaching to pump to make sure all pipeline
debris is clear. Use an in-line air filter. A 5μ (micron)
air filter is recommended.
NOTE: 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: Wilden®H220 High Pressure pumps
cannot be used in submersible applications.
CAUTION: Re-torque all hardware prior to installation.
Section 1

WIL-11113-E-04 Wilden®
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LEGEND
MATERIAL CODES
MODEL
XHS430S = HIGH PRESSURE
SIMPLEX/ATEX
WETTEDPATH
A = ALUMINUM
S = STAINLESS STEEL
OUTERPISTON
S = STAINLESS STEEL
AIR CHAMBER
A = ALUMINUM
S = STAINLESS STEEL
CENTER BLOCK
A = ALUMINUM
S = STAINLESS STEEL
AIR VALVE
A = ALUMINUM
S = STAINLESS STEEL
DIAPHRAGMS
FWS = SANITARY WIL-FLEX™
[Santoprene
®
(Two Orange Dots)]
VALVE BALLS
WF = WIL-FLEX™ [Santoprene
®
(Orange Dot)]
VALVE SEATS
A = ALUMINUM
S = STAINLESS STEEL
VALVE SEAT O-RINGS
TF = PTFE (White)
NOTE: Most Elastomeric Materials use colored dot for identification. Santoprene
®
is a registered trademark of Monsanto Company, licensed to Advanced Elastomer Systems, L.P .
NOTE: Not all models are available with all material options.
HS430S METAL
38 mm (1-1/2") Pump
Maximum Flow Rate:
Aluminum
280 lpm (74 gpm)
Stainless Steel
264 lpm (70 gpm)
HS430S
/
X
X
X
X
X
/
XXX
/
XX
/
X
XX
/
XXXX
O-RINGS
MODEL
VALVE SEAT
VALVE BALLS
SPECIALTY CODE
DIAPHRAGMS
(if applicable)
AIR VALVE
CENTER BLOCK
AIR CHAMBERS
OUTER PISTON
WETTED PATHS
Section 2
WILDEN PUMP DESIGNATION SYSTEM
SPECIALTY CODES
0320
Single-point exhaust
0323
Single-point exhaust, DIN flange
0504
DIN flange

WIL-11113-E-04 Wilden®
6
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.
FIGURE 1 When air pressure is supplied to
the pump, the air valve directs pressure to the
back side of the diaphragm A. The
compressed air moves the diaphragm away
from the center section 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 atmospherethroughtheexhaust port.The
movement of diaphragm B towards the center
section of the pump creates a vacuum within
the chamber B. Atmospheric pressure forces
fluid into the inlet manifold forcing the inlet
valve ball off of its seat. Liquid is free to move
past the inlet valve ball and fill the liquid
chamber (see shaded area).
FIGURE 2 Once the shaft has reached the
end of its stroke, the air valve redirects
pressurized air to the back side of the
diaphragm B. This pressurized air is also
directed to the opposite side of the
diaphragm A through a passageway that is
routed through the common shaft and outer
piston. The pressurized air forces diaphragm
B away from the center section while also
pushing diaphragm A to the center section.
Diaphragm B is now on its discharge stroke.
Diaphragm B forces the inlet valve ball onto
itsseatduetothehydraulicforces developed
in the liquid chamber and manifold of the
pump. These same hydraulic forces lift the
discharge valve ball off of its seat, forcing
fluidto flow through the pump discharge. The
pressure on diaphragm A creates a force on
the shaft that is combined with the pressure
from diaphragm B. This total load is
transferred to the liquid creating a liquid
pressure that is two times greater than the
supplied air pressure.
FIGURE 3 At completion of the stroke, the
air valve again redirects air to the back side
of the diaphragmA, 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
maytakeseveralcyclestocompletelyprime
depending on the condition of the
application.
HOW IT WORKS —AIR DISTRIBUTION SYSTEM
The heart of the patented Pro-Flo®SHIFT Air Distribution System
(ADS) is the air valve assembly. The air valve design incorporates an
unbalanced spool with the small end of the spool being pressurized
continuously while the large end of the spool is alternately pressurized,
then exhausted to move the spool. The air valve spool directs
pressurized air to one chamber while exhausting the other. The air
forces the main shaft/diaphragm assembly to move to one side –
discharging liquid on that side and pulling liquid in on the other side.
When the shaft reaches the end of the stroke, the inner piston actuates
the pilot spool, which controls the air to the large end of the air valve
spool. The repositioning ofthe air valve spool routes the air to the other
air chamber. The air control spool allows air to flow freely into the air
chamber for the majority of each pump stroke, but it significantly
restricts the flowof air into the airchamber when activated by the inner
piston near the end of the each stroke
Section 3
HOW IT WORKS —PUMP

WIL-11113-E-04 Wilden®
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HS430S Aluminum
HS430S Stainless Steel
DIMENSIONS
ITEM
METRIC (mm)
STANDARD (inch)
A
442
17.4
B
80
3.1
C
324
12.7
D
531
20.9
E
609
24.0
F
606
23.9
G
125
4.9
H
122
4.8
J
50
2.0
K
132
5.2
L
334
13.1
M
531
20.9
N
312
12.3
P
247
9.7
R
206
8.1
S
152
6.0
T
170
6.7
U
11
0.4
DIN (mm)
ANSI (Inch)
V
150 DIA.
6.1 DIA.
W
109 DIA.
4.5 DIA.
X
18 DIA.
0.9 DIA.
LW0317 REV. A
DIMENSIONS
ITEM
METRIC (mm)
STANDARD (inch)
A
443
17.5
B
89
3.5
C
285
11.2
D
292
11.5
E
529
20.8
F
273
10.8
G
50
2.0
H
132
5.2
J
334
13.1
K
321
12.7
L
531
20.9
M
519
20.4
N
86
3.4
P
276
10.9
R
224
8.8
S
178
7.0
T
203
8.0
U
11
0.4
DIN DN 40
ANSI 300#
V
150 DIA.
6.1 DIA.
W
109 DIA.
4.5 DIA.
X
18 DIA.
0.9 DIA.
LW0293 REV. A
,
DIMENSIONAL DRAWING
Section 4

WIL-11113-E-04 Wilden®
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PERFORMANCE
HS430S ALUMINUM
TPE-FITTED
ShipWeight......................... 29 kg (64 lb)
Air Inlet..................................19 mm (3/4 " )
Inlet................................. 38 mm (1-1/2")
Outlet .................................38 mm (1-1/2")
Suction Lift..................... 2.0 m Dry (6.8')
9.0 m Wet (29.5')
Disp.PerStroke
1
................ 1.66 L (0.44 gal)
Max.FlowRate............280 lpm (74 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 60 lpm (16 gpm)
against a discharge head of 7.6 bar
(110 psig) requires 6.9 bar (100 psig)
and 84.9 Nm
3
/h (50 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.
HS430S STAINLESS STEEL
TPE-FITTED
ShipWeight......................... 55 kg (121 lb)
Air Inlet.....................................19 mm (3/4 " )
Inlet....................................38 mm (1-1/2")
Outlet ....................................38 mm (1-1/2")
Suction Lift........................2.0 m Dry (6.8')
9.0 m Wet (29.5')
Disp.PerStroke
1
................... 1.55 L (0.41 gal)
Max.FlowRate...............264 lpm (70 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 49 lpm (13 gpm)
against a discharge head of 4.8 bar
(70 psig) requires 4.1 bar (60 psig)
and 51 Nm
3
/h (30 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.
Section 5

WIL-11113-E-04 Wilden®
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SUCTION LIFT CURVES
HS430S METAL
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.

WIL-11113-E-04 Wilden®
10
Suggested Installation, Operation, Maintenance and Troubleshooting
Wilden pumps are designed to meet the performance requirements of
even the most demanding pumping applications. They have been
designed and manufactured to the highest standards and are available in
a variety of liquid path materials to meet your chemical resistance needs.
Refer to the performance section of this manual for an in-depth analysis of
the performance characteristics of your pump. Wilden offers the widest
variety of elastomer options in the industry to satisfy temperature,
chemical compatibility, abrasion resistance and flex concerns.
The suction pipe size should be at least the equivalent or larger than the
diameter size of the suction inlet on your Wilden pump. The suction hose
must be non-collapsible, reinforced type as these pumps are capable of
pulling a high vacuum. Discharge piping should also be the equivalent or
larger than the diameter of the pump discharge which will help reduce
friction losses. It is critical that all fittings and connections are airtight or a
reduction or loss of pump suction capability will result.
CAUTION: All fittings and connections must be airtight.
Otherwise, pump suction capability will be reduced or lost.
Months of careful planning, study, and selection efforts can result in
unsatisfactory pump performance if installation details are left to chance.
Premature failure and long-term dissatisfaction can be avoided if
reasonable care is exercised throughout the installation process.
Location
Noise, safety, and other logistical factors usually dictate where
equipment will be situated on the production floor. Multiple installations
with conflicting requirements can result in congestion of utility areas,
leaving few choices for additional pumps.
Within the framework of these and other existing conditions, every
pump should be located in such a way that 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 6 .9
bar (100 psig) depending on pumping requirements.
For best results, the pumps should use a 5μ (micron) air filter,
needle valve and regulator. The use of an air filter before the
pump will ensure that the majority of any pipeline contaminants
will be eliminated.
• Solenoid Operation: When operation is controlled by a solenoid
valve in the air line, three-way valves should be used. This valve
allows trapped air between the valve and the pump to bleed off
which improves pump performance. Pumping volume can be
estimated by counting the number of strokes per minute and then
multiplying the figure by the displacement per stroke.
• Muffler: Sound levels are reduced below OSHA specifications
using the standard Wilden muffler. Other mufflers can be used
to further reduce sound levels, but they usually reduce
pump performance.
• Elevation: Selecting a site that is well within the pump’s dynamic
lift capability will assure that loss-of-prime issues will be
eliminated. In addition, pump efficiency can be adversely
affected if proper attention is not given to site location .
• Piping: Final determination of the pump site should not be made
until the piping challenges of each possible location have been
evaluated. The impact of current and future installations should
be considered ahead of time to make sure that inadvertent
restrictions are not created for any remaining sites.
The best choice possible will be a site involving the shortest and
straightest hook-up of suction and discharge piping. Unnecessary
elbows, bends, and fittings should be avoided. Pipe sizes should be
selected to keep friction losses within practical limits. All piping
should be supported independently of the pump. In addition, the
piping should be aligned to avoid placing stress on the pump fittings.
Flexible hose can be installed to aid in absorbing the forces created
by the natural reciprocating action of the pump. If the pump is to be
bolted down to a solid location, a mounting pad placed between the
pump and the foundation will assist in minimizing pump vibration.
Flexible connections between the pump and rigid piping will also
assist in minimizing pump vibration. If quick-closing valves are
installed at any point in the discharge system, or if pulsation within a
system becomes a problem, a surge suppressor (SD Equalizer®)
should be installed to protect the pump, piping and gauges from
surges and water hammer.
If the pump is to be used in a self-priming application, make sure that
all connections are airtight and that the suction lift is within the
model’s ability.
NOTE: Materials of construction and elastomer material
have an effect on suction lift parameters. Please refer to
the performance section for specifics.
When pumps are installed in applications involving flooded suction or
suction head pressures, a gate valve should be installed in the
suction line to permit closing of the line for pump service.
Pumps in service with a positive suction head are most efficient
when inlet pressure is limited to 0.5–0.7 bar (7–10 psig). Premature
diaphragm failure may occur if positive suction is 0 7 bar (10 psig)
and higher.
CAUTION: 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 6.9 bar (100 psig) air
supply pressure.
Section 6

WIL-11113-E-04 Wilden®
11
Suggested Installation, Operation, Maintenance and Troubleshooting
NOTE: This illustration is a generic
representation of an air-operated
double-diaphragm pump.
NOTE: In the event of a power failure, the shut-off
valve should be closed, if restarting of the pump is
not desirable once power is regained.
Air-Operated Pumps: To stop the pump from operating in
an emergency situation, simply close the shut-off valve (user-
supplied) installed in the air supply line. A properly functioning
valve will stop the air supply to the pump, therefore stopping
output. This shut-off valve should be located far enough away
from the pumping equipment such that it can be reached safely
in an emergency situation.
Operation
The HS430S is pre-lubricated, and does not require in-line
lubrication. Additional lubrication will not damage the pump,
however if the pump is heavily lubricated by an external source,
the pump’s internal lubrication may be washed away. If the
pump is then moved to a non-lubricated location, it may need to
be disassembled and re-lubricated as described in the
DISASSEMBLY/REASSEMBLY INSTRUCTIONS.
Pump-discharge rate can be controlled by limiting the volume
and/or pressure of the air supply to the pump. 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 flow rate. (See Section 5.) This is useful when
the need exists to control the pump from a remote location.
When the pump discharge pressure equals or exceeds the air
supply pressure, the pump will stop; no bypass or pressure relief
valve is needed, and pump damage will not occur. The pump has
reached a “deadhead” situation and can be restarted by reducing
the fluid discharge pressure or increasing the air inlet pressure.
The Wilden Pro-Flo®SHIFT pumps run solely on compressed air
and do not generate heat, therefore your process fluid
temperature will not be affected.
Maintenance and Inspections
Since each application is unique, maintenance schedules may be
different for every pump. Frequency of use, line pressure, viscosity
and abrasiveness of process fluid all affect the parts life of a Wilden
pump. Periodic inspections have been found to offer the best means
for preventing unscheduled pump downtime. Personnel familiar with
the pump’s construction and service should be informed of any
abnormalities that are detected during operation.
Records
When service is required, a record should be made of all necessary
repairs and replacements. Over a period of time, such records can
become a valuable tool for predicting and preventing future
maintenance problems and unscheduled downtime. In addition,
accurate records make it possible to identify pumps that are poorly
suited to their applications.

WIL-11113-E-04 Wilden®
12
Suggested Installation, Operation, Maintenance and Troubleshooting
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 filter for debris
(see SUGGESTED 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 that would
obstruct the movement of internal parts.
5. Check for sticking check valves. If material being
pumped is not compatible with pump elastomers,
swelling may occur. Replace check valves with
proper elastomers.
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 flows.
1. Check for pump cavitation; decrease pump speed to
allow thick material to flow into 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 check valves. If material being pumped
is not compatible with pump elastomers, swelling may
occur. Replace check valves with proper elastomers.
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 filter may be used to remove
the water from the compressed air in some applications.
Air bubbles in pump discharge.
1. Check for ruptured diaphragm.
2. Check tightness of outer pistons (refer to Section 7).
3. Check tightness of fasteners and integrity of O-rings and seals,
especially at intake manifold.
4. Ensure pipe connections are airtight.
Product comes out air exhaust.
1. Check for diaphragm rupture.
2. Check tightness of outer pistons to shaft.

WIL-11113-E-04 Wilden®
13
Disassembly / Reassembly
Pump Disassembly
Tools Required:
 9/16" Wrench
 Adjustable Wrench
 Vise equipped w/ soft jaws
(such as plywood, plastic
or other suitable material)
CAUTION: Before any maintenance or repair is attempted, the compressed air
line to the pump should be disconnected and all air pressure allowed to bleed
from the pump. Disconnect all intake, discharge and air lines. Drain the pump
by turning it upside down and allowing any fluid to flow into a suitable container.
Be aware of any hazardous effects of contact with your process fluid.
NOTE: The model photographed is an aluminum PX820 51 mm (2”) pump.
Your specific pump model may vary from configuration shown.
Step 1
Before starting disassembly, mark a line
from each liquid chamber to its
corresponding air chamber. This line will
assist in proper alignment during
reassembly.
Step 2
Using the appropriate-sized wrench for
your pump size, loosen the discharge
manifold from the liquid chambers.
Step 3
Lift the discharge manifold to expose
discharge valve ball, valve seat and plug.
Inspect ball cage area of manifold for
excessive wear or damage.
Section 7

WIL-11113-E-04 Wilden®
14
Disassembly / Reassembly
Step 4
Remove the discharge valve ball, valve
seat and plug 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 5
Using the appropriate-sized wrench,
loosen the inlet manifold from the liquid
chambers.
NOTE: Inverting the pump
will facilitate removal of inlet
manifold.
Step 6
Remove the inlet manifold to expose the valve
ball, valve seat and plug.
Step 7
Remove the inlet valve ball, valve seat
and plug from the inlet manifold and
liquid chambers and inspect for nicks,
gouges, chemical attack or abrasive
wear.
NOTE: Replace worn parts
with genuine Wilden parts for
reliable performance.
Step 8
Using the appropriate-sized wrench,
remove the liquid chamber from the
center section.
Step 9
The liquid chamber should be removed to
expose the diaphragm and outer piston using
an adjustable wrench. Remove the diaphragm
assembly from the center section. Repeat for
opposite side.

WIL-11113-E-04 Wilden®
15
Disassembly / Reassembly
Step 10
Inspect the diaphragm assembly for
wear, damage or chemical attack.
Replace any damaged components with
genuine Wilden parts for reliable
performance,
Step 11
To remove diaphragm assembly from
shaft, secure shaft with soft jaws
(aluminum, plastic or plywood) to
ensure the shaft is not damaged. Using
an adjustable wrench, remove the
diaphragm assembly from the shaft.
Step 12
Remove outer piston and stud if equipped.
Inspect for wear and replace if necessary.
Step 13
Locate the outer piston on the side of
the amplification chamber has an air
passageway at the center of the outer
piston lug. This air passageway allows
air to flow from the opposite air chamber
to the amplification chamber. This
principle is how the HS430S high-
pressure pump achieves a 2:1 ratio of
inlet air pressure to discharge pressure.
Step 14
When reassembling the HS430S pump, the outer piston (with the air passageway) has to be
positioned on the same side as the amplification chamber. If it is not reassembled correctly,
the pump will not operate and process fluid will enter the air distribution system through the
air passageway located at the shaft lug.
This same air passageway continues through the diaphragm shaft, exits out of the diaphragm
shaft via a 90º turn and into the air chamber located on the wetted side of the pump. The air
passageway has to be positioned in the air chamber on the wetted side of the pump, opposite
the amplification chamber.

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Disassembly / Reassembly
Air Valve / Center Section Disassembly
Tools Required :
• 3/16" Hex-Head
Wrench
• 1/4" Hex-Head
Wrench O-Ring Pick
• Snap-Ring Pliers
CAUTION: Before any maintenance or repair is attempted, the compressed air line to the pump should
be disconnected and all air pressure allowed to bleed from the pump. Disconnect all intake, discharge
and air lines. Drain the pump by turning it upside down and allowing any fluid to flow into a suitable
container. Be aware of any hazardous effects of contact with your process fluid.
NOTE: Replace worn parts with genuine Wilden parts for reliable performance .
Step 1
Using a pair of snap-ring pliers, remove the
snap ring from pilot sleeve.
Step 2
Using an O-ring pick, remove O-ring
from modulator spool.
Step 3
Using the appropriate-sized wrench, loosen
and remove the fasteners that attach the air
chamber to center section.

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Disassembly / Reassembly
Step 4
Lift away air chamber from center
section and remove center block gasket.
Replace gasket if necessary,
Step 5
Turn assembly over and remove the pilot
spool sleeve from the center section.
Step 6
Using an O-ring pick, gently remove the O-ring
from the opposite side of the dimpled end of the
pilot spool.
Step 7
Gently remove the pilot spool from the
sleeve and inspect for nicks, wear or
damage. Replace the pilot spool assembly
or sleeve O-rings if necessary. During
reassembly, never insert the dimpled end of
the pilot spool first, this will damage the
single urethane O-ring by passing it over
the ports in the pilot sleeve.
NOTE: Seals should not be
removed from the assembly.
Seals are not sold separately.
Step 8
Remove modulator spool from center
section. Check for wear to spool or O-rings
and replace if necessary.
Step 9
Using the appropriate-sized wrench, loosen the
fasteners and lift away remaining air chamber
and center block gasket from center section.
Replace gasket if necessary.

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Disassembly / Reassembly
Step 10
Using an O-ring pick, remove the two
(2) shaft bushings from center block.
Inspect and replace if necessary. Using
an O-ring pick, gently remove the two
(2) Glyd™ rings from the center block.
Inspect and replace if necessary.
Step 11
Using an O-ring pick, remove the two
(2) Glyd™ rings from modulator spool
bore. Inspect and replace if necessary.
Step 12
Using an appropriate-sized wrench, remove the
pilot exhaust muffler. Inspect for damage or
contamination and replace if necessary.
Step 13
Using an appropriate-sized hex wrench,
loosen and remove the four (4) air valve
bolts from center section assembly.
Step 14
Lift away muffler plate and muffler plate gasket from center block. Inspect for wear and
replace if necessary. Lift away the air valve assembly and remove air valve gasket. Inspect
the gasket and replace if necessary.

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Disassembly / Reassembly
Step 15
Remove air valve end cap to expose air
valve spool by lifting up on end cap.
Inspect O-ring on end cap using an O-
ring pick. Replace O-ring(s) if necessary.
NOTE: The Pro-Flo®SHIFT air valve
incorporates an end cap at both ends of
the air valve,
Step 16
Remove the air valve spool from the air valve body by threading one air valve bolt into the end of the air
valve spool and gently sliding the spool out of the air valve body. Inspect seals for signs of wear and
replace the entire air valve assembly if necessary. Re-insert the spool immediately into air valve body after
inspection as the seals expand and cannot be reinserted after a length of time.
NOTE: Seals should not be removed from the assembly. Seals are not sold separately.
SINGLE - POINT EXHAUST PRO - FLO®SHIFT
Step 1
Remove pilot exhaust muffler in pilot
bleed port located at the front of the
center block. Install 1/4" NPT pipe plug
(00-7010-08) into bleed port.
Step 2
Next, install an optional single-point exhaust air valve
gasket (04-2638-52). The single-point air valve gasket can
be purchased as a spare part or included with the purchase
of a new Pro-Flo®SHIFT pump.

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Disassembly / Reassembly
REASSEMBLY HINTS & TIPS
REASSEMBLY
Upon performing applicable maintenance to the air
distribution system, the pump can now be reassembled.
Please refer to the disassembly instructions for photos
and parts placement. To reassemble the pump, follow
the disassembly instructions in reverse order. The air
distribution system needs to be assembled first, then the
diaphragms and finally the wetted path.
The following tips will assist in the assembly process:
Lubricate air valve bore, center section shaft and
pilot spool bore with NLGI grade 2 white EP
bearing grease or equivalent.
Clean the inside of the center section shaft bore to
ensure no damage is done to new shaft seals.
A small amount of NLGI grade 2 white EP bearing
grease can be applied to the muffler and air valve
gaskets to lubricate gaskets during assembly.
Make sure that the exhaust port on the muffler
plate is centered between the two exhaust ports
on the center section.
Stainless-steel bolts should be lubed to reduce the
possibility of seizing during tightening.
Use a mallet to tap lightly on the large clamp
bands to seat the diaphragm before tightening.
MAXIMUM TORQUE SPECIFICATIONS
Description
Torque
Air Valve
13.6 N•m (120 in-lb)
Center Block to Air Chamber
27.1 N•m (20 ft-lb)
Liquid Chamber to Air Chamber
47.5 N•m (35 ft-lb)
Manifolds, Stainless Steel
47.5 N•m (35 ft-lb)
Manifolds to Liquid Chambers
47.5 N•m (35 ft-lb)
Figure A
SHAFT SEAL INSTALLATION
PRE-INSTALLATION
• Once all of the old seals have been removed, the inside of
the bushing should be cleaned to ensure no debris is left that
may cause premature damage to the new seals.
INSTALLATION
The following tools can be used to aid in the installation of the
new seals:
•Needle-Nose Pliers
•Phillips Screwdriver
•Electrical Tape
•Wrap electrical tape around each leg of the needle-nose pliers
(heat shrink tubing may also be used). This is done to prevent
damaging the inside surface of the new seal.
•With a new seal in hand, place the two legs of the needle-
nose pliers inside the seal ring. (See Figure A.)
•Open the pliers as wide as the seal diameter will allow, then
with two fingers pull down on the top portion of the seal to
form a kidney shape. (See Figure B.)
•Lightly clamp the pliers together to hold the seal in the kidney
shape. Be sure to pull the seal into as tight of a kidney shape
as possible, this will allow the seal to travel down the bushing
bore easier.
•With the seal clamped in the pliers, insert the seal into the
bushing bore and position the bottom of the seal into the
correct groove. Once the bottom of the seal is seated in the
groove, release the clamp pressure on the pliers. This will
allow the seal to partially snap back to its original shape.
•After the pliers are removed, you will notice a slight bump in
the seal shape. Before the seal can be properly resized, the
bump in the seal should be removed as much as possible.
This can be done with either the Phillips screwdriver or your
finger. With either the side of the screwdriver or your finger,
apply light pressure to the peak of the bump. This pressure
will cause the bump to be almost completely eliminated.
•Lubricate the edge of the shaft with NLGI grade 2 white EP
bearing grease.
•Slowly insert the center shaft with a rotating motion. This will
complete the resizing of the seal.
•Perform these steps for the remaining seals.
Figure B
.