Page 1
PV20
Original™ Series METAL Pumps
Simplify your process
EOM
Engineering
Operation &
Maintenance
TT5049 10/05 2.5M TT5049 EOM-PV20M 9/05
Page 2
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 CURVES
A. Performance Curves
Rubber-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
TPE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Ultra-Flex™-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
B. Suction Lift Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SECTION 6 INSTALLATION, OPERATION & TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . .7
SECTION 7 ASSEMBLY / DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
SECTION 8 EXPLODED VIEW & PARTS LISTING
Rubber-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
SECTION 9 ELASTOMER OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Page 3
Section 1
CAUTIONS—READ FIRST!
CAUTION: Do not apply compressed air to the
exhaust port — pump will not function.
CAUTION: Do not over-lubricate air supply —
excess lubrication will reduce pump performance.
Pump is pre-lubed.
TEMPERATURE LIMITS:
Neoprene –18°C to 93°C 0°F to 200°F
Buna-N –12°C to 82°C 10°F to 180°F
Nordel
®
–51°C to 138°C –60°F to 280°F
Viton® –40°C to 177°C –40°F to 350°F
Sanifl ex™ –29°C to 104°C –20°F to 220°F
Polytetrafl uoroethylene (PTFE)
4°C to 104°C 40°F to 220°F
Polyurethane –12°C to 66°C 10°F to 150°F
Wil-Flex™ -40°C to 107.2°C -40ºF to 225ºF
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 signifi cantly reduce maximum
safe operating temperatures. Consult Chemical
Resistance Guide (E4) for chemical compatibility
and temperature limits.
WARNING: Prevention of static sparking — If
static sparking occurs, fi re or explosion could
result. Pump, valves, and containers must be
grounded to a proper grounding point when
handling fl ammable fl uids and whenever
discharge of static electricity is a hazard.
CAUTION: Do not exceed 8.6 bar (125 psig) air
supply pressure.
CAUTION: The process fl uid and cleaning fl uids
must be chemically compatible with all wetted
pump components. Consult Chemical Resistance
Guide (E4).
CAUTION: Do not exceed 82°C (180°F) air inlet
temperature for Pro-Flo V™ models.
CAUTION: Pumps should be thoroughly fl ushed
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 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 Tefl on® diaphragms, it is
important to tighten outer pistons simultaneously
(t urning in op posite dir ections ) to ens ure tight fi t.
(See torque specifi cations in Section 7.)
NOTE: Cast Iron Tefl on®-fi tted pumps come
standard from the factory with expanded Tefl on
®
gaskets installed in the diaphragm bead of the
liquid chamber. Tefl on® gaskets cannot be reused. Consult PS-TG for installation instructions
during reassembly. This excludes Pro-Flo® P200
Advanced™ metal pumps.
NOTE: Before starting disassembly, mark a line
from each liq uid cha mber to i t s c orrespond ing ai r
chamber. This line will assist in proper alignment
during reassembly.
CAUTION: Pro-Flo® pumps cannot be used in
submersible applications. Pro-Flo V™ is available
in both submersible and non-submersible options.
Do not use non-submersible Pro-Flo V™ models
®
in submersible applications. Turbo-Flo
pumps
can also be used in submersible applications.
CAUTION: Tighten all hardware prior to installation.
TT5049 EOM-PV20M 9/05 1 WILDEN PUMP & ENGINEERING, LLC
Page 4
Section 2
WILDEN PUMP DESIGNATION SYSTEM
PV20 ORIGINAL™
METAL
102 mm (4") Pump
Maximum Flow Rate:
1174 LPM (310 GPM)
LEGEND
In the case where a center section is used instead of a center block and air chambers,
the designat ion will be as follows: A luminum = A A, Polypropy lene = PP,
MATERIAL CODES
WETTED PARTS
WW = CAST IRON / CAST IRON
AIR CHAMBERS
A = ALUMINUM
CENTER BLOCK
A = ALUMINUM
AIR VALVE
A = ALUMINUM
PV20 / XXXXX / XXX / XX / XXX / XXXX
MODEL
VALVE BALLS
DIAPHRAGMS
AIR VALVE
CENTER BLOCK
AIR CHAMBERS
OUTER PISTON
WETTED PARTS
Carbon-filled Acetal = GG, Acetal = LL
DIAPHRAGMS
BNS = BUNA-N (Red Dot)
BNU = BUNA-N, Ultra-Flex™
EPS = EPDM (Blue Dot)
EPU = EPDM, Ultra-Flex™
FSS = SANIFLEX™
[Hytrel® (Cream)]
NES = NEOPRENE (Green Dot)
NEU = NEOPRENE, Ultra-Flex™
PUS = POLYURETHANE (Clear)
VTU = VITON®, Ultra-Flex™
VTS = VITON®
(Silver or White Dot)
WFS = WIL-FLEX™ [Santoprene®
(Orange Dot)]
O-RINGS
VALVE SEAT
VALVE BALL
PU = POLYURETHANE (Brown)
TF = TEFLON® PTFE (White)
VALVE SEAT
P = POLYURETHANE (Brown)
V = VITON
MANIFOLD GASKET
EP = EPDM
VT = VITON
SPECIALTY
CODE
(if applicable)
®
®
SPECIALTY CODES
0057 PV20 with undrilled drain holes
NOTE: MOST ELASTOMERIC MATERIALS USE COLORED DOT FOR IDENTIFICATION
®
is a registered trademark of Dupont Dow Elastomers.
Viton
WILDEN PUMP & ENGINEERING, LLC 2 TT5049 EOM-PV20M 9/05
Page 5
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.
#,/3%$
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"!
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FIGURE 1 The air valve dir ects 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, balancing the
load and removing 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
port of the pump. The movement of
diaphragm B toward the center 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).
).,%4
#,/3%$
#,/3%$
FIGURE 2 When the pressurized diaphragm,
diaphr agm A, re ache s the limit of i ts dis charge
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 fl uid to fl ow 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 fl uid into the inlet
manifold of the pump. The inlet valve ball
is f or ce d o ff it s seat a ll ow ing t he fl uid being
pumped to fi ll the liquid chamber.
/0%.
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/0%.
#,/3%$ /0%.
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/0%.
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 suction stroke. As
the pump reaches its original starting
point, each diaphragm has gone through
one suction 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.
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HOW IT WORKS—AIR DISTRIBUTION SYSTEM
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TT5049 EOM-PV20M 9/05 3 WILDEN PUMP & ENGINEERING, LLC
0),/430//,
%.$#!0
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 shift to
one side — discharging liquid on that side and pulling liquid in
on the other side. When the shaft 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
Page 6
Section 4
DIMENSIONAL DRAWINGS
PV20 Original™ Metal
DIMENSIONS
ITEM METRIC (mm) STANDARD (inch)
A 950 37.4
B 119 4.7
C 419 16.5
D 680 26.8
E 826 32.5
F 48 1.9
G 424 16.7
H 213 8.4
J 170 6.7
K 424 16.7
L 599 23.6
M 455 17.9
N 376 14.8
P 279 11.0
Q 333 13.1
R 15 DIA. 0.6
DIN (mm) ANSI (inch)
S 231 DIA. 9.1 DIA.
T 191 DIA. 7.5 DIA.
U 18 DIA. 0.7 DIA.
WILDEN PUMP & ENGINEERING, LLC 4 TT5049 EOM-PV20M 9/05
Page 7
Section 5A
PERFORMANCE
PV20 ORIGINAL™ METAL
RUBBER-FITTED
Height ................................. 826 mm (32.5")
Width ................................... 950 mm (37.4")
Depth .................................. 424 mm (16.7")
Ship Weight ..... Cast Iron 223 kg (492 lbs.)
Air Inlet ................................... 19 mm (3/4")
Inlet .......................................... 102 mm (4")
Outlet ....................................... 102 mm (4")
Suction Lift ...................... 4.0 m Dry (13.1')
9.3 m Wet (30.6')
Displacement Per Stroke . 4.69 l (1.24 gal.)
Max. Flow Rate .......... 1174 lpm (310 gpm)
Max. Size Solids ................ 3.5 mm (1-3/8")
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 454.2 lpm (120 gpm)
against a discharge pressure head of 1.9
bar (27 psig) requires 2.8 bar (40 psig) and
101.9 Nm3/h (60 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.
PV20 ORIGINAL™ METAL
TPE-FITTED
Height ................................. 826 mm (32.5")
Width ................................... 950 mm (37.4")
Depth .................................. 424 mm (16.7")
Ship Weight ..... Cast Iron 223 kg (492 lbs.)
Air Inlet ................................... 19 mm (3/4")
Inlet .......................................... 102 mm (4")
Outlet ....................................... 102 mm (4")
Suction Lift ...................... 4.1 m Dry (13.6')
9.3 m Wet (30.6')
Displacement Per Stroke . 4.73 l (1.25 gal.)
Max. Flow Rate .......... 1149 lpm (304 gpm)
Max. Size Solids ................ 3.5 mm (1-3/8")
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 454.2 lpm (120 gpm)
against a discharge pressure head of 1.9
bar (28 psig) requires 2.8 bar (40 psig) and
101.9 Nm
(See dot on chart.)
Caution: Do not exceed 8.6 bar (125 psig)
air supply pressure.
3
/h (60 scfm) air consumption.
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.
TT5049 EOM-PV20M 9/05 5 WILDEN PUMP & ENGINEERING, LLC
Page 8
PERFORMANCE
PV20 ORIGINAL™ METAL
ULTRA-FLEX™-FITTED
Height ................................. 826 mm (32.5")
Width ................................... 950 mm (37.4")
Depth .................................. 424 mm (16.7")
Ship Weight ..... Cast Iron 223 kg (492 lbs.)
Air Inlet ................................... 19 mm (3/4")
Inlet .......................................... 102 mm (4")
Outlet ....................................... 102 mm (4")
Suction Lift ....................... 3.5 m Dry (11.6')
9.3 m Wet (30.6')
Displacement Per Stroke . 4.05 l (1.07 gal.)
Max. Flow Rate ........... 926 lpm (245 gpm)
Max. Size Solids ................ 3.5 mm (1-3/8")
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 378.5 lpm (100 gpm)
against a discharge pressure head of 2.1
bar (30 psig) requires 2.8 bar (40 psig) and
101.9 Nm3/h (60 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
Section 5B
SUCTION LIFT CURVE
PV20 ORIGINAL
METAL SUCTION LIFT
CAPABILITY
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03)'
;"!2=
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WILDEN PUMP & ENGINEERING, LLC 6 TT5049 EOM-PV20M 9/05
Page 9
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, needle valve 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.
TT5049 EOM-PV20M 9/05 7 WILDEN PUMP & ENGINEERING, LLC
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 V™ pumps can be
used for submersible applications, when using the Pro-Flo
V™ submersible option. Turbo-Flo™ pumps can also be
used for submersible applications.
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.
®
)
Page 10
SUGGESTED INSTALLATION
This illustration is a generic
representation of an air-operated
double-diaphragm pump.
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NOTE: In the event of a power failure, the air shut off
valve should be closed, if the restarting of the pump is
not desirable once power is regained.
AIR OPERATED PUMPS: To stop the pump from
operating in an emergency situation, simply close the
&//40!$
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.
WILDEN PUMP & ENGINEERING, LLC 8 TT5049 EOM-PV20M 9/05
Page 11
OPERATION: The Pro-Flo® and Pro-Flo V™ 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 nonlubricated 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. A
regulator is used to control air pressure while a needle
valve is used to control volume. Pump discharge rate
can also be controlled by throttling the pump discharge
by partially closing a valve in the discharge line of the
pump. This action increases friction loss which reduces
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”
TROUBLESHOOTING
situation and can be restarted by reducing the fl uid
discharge pressure or increasing the air inlet pressure.
®
The Pro-Flo
and Pro-Flo V™ 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.
Pump will not run or runs slowly.
1. Ensure that the air inlet pressure is at least 0.3 Bar
(5 psig) above startup pressure and that the differential
pressure (the difference between air inlet and liquid
discharge pressures) is not less than 0.7 Bar (10 psig).
2. Check air inlet 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,
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
seats with proper elastomers. Also, as the check
valve balls wear out, they become smaller and can
become stuck in the seats. In this case, replace balls
and seats.
pilot spool, 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,
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.
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 liquid chambers.
TT5049 EOM-PV20M 9/05 9 WILDEN PUMP & ENGINEERING, LLC
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.
Page 12
Section 7
PUMP DISASSEMBLY
Tools Required:
• 1/2" Wrench
• 3/4" Wrench
• Adjustable Wrench
• Vise equiped 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 into a suitable
container. Be aware of any hazardous effects of contact with your process fl uid.
Step 1
Before starting disassembly, mark
a line from each liquid chamber to
corresponding air chamber. This
will assist in proper alignment during reassembly.
WILDEN PUMP & ENGINEERING, LLC 10 TT5049 EOM-PV20M 9/05
Step 2
Remove the ball pot covers by turning wing nuts counterclockwise.
Step 3
After removing the ball pot covers,
remove valve balls and ball pot orings and inspect for nicks, chemical attack or abrasive wear. Replace
worn parts with genuine Wilden
parts for reliable performance.
Page 13
PUMP DISASSEMBLY
Step 4
Using a 1/2” wrench, disconnect the
discharge manifold and discharge
ball pot cages. NOTE: Due to the
weight of the discharge t-section
and ball pot cage assembly, proper
care should be taken when disassembling this area of the pump.
Step 5
Next, remove the discharge t-section and ball pot cage assembly
from the pump.
Step 6
Using a 1/2” wrench, disconnect the
main body of the pump, which includes the center section assembly,
liquid chambers and inlet ball pot
assemblies.
Step 7
With assistance, remove the main
body of the pump from the inlet
manifold assembly.
TT5049 EOM-PV20M 9/05 11 WILDEN PUMP & ENGINEERING, LLC
Step 8
Using a 1/2” wrench, remove inlet
elbows from inlet t-section to expose manifold gaskets. Inspect for
nicks, chemical attack or abrasive
wear. Replace if necessary.
Step 9
With the inlet and discharge manifold assemblies removed, the main
body of the pump can now be disassembled.
Page 14
PUMP DISASSEMBLY
Step 10
Using a 1/2” wrench, remove the
discharge elbows and inlet ball pots
from the liquid chambers.
Step 11
After removing the inlet ball pots
and discharge elbows from liquid
chamber, inspect manifold gaskets
for nicks, chemical attack or abrasive wear. Replace if necessary.
Step 12
To ease the disassembly process,
position center section assembly
and liquid chambers so that one
side is facing up. Next, using a 3/4”
wrench, remove the upper-most
large clamp band assembly which
secures one liquid chamber to the
center section.
Step 13
With large clamp band removed, lift
the upper-most liquid chamber from
the center section to expose the diaphragm and outer piston.
WILDEN PUMP & ENGINEERING, LLC 12 TT5049 EOM-PV20M 9/05
Step 14
Using an adjustable wrench, or by
rotating the diaphragm by hand, remove the diaphargm assembly.
Step 15
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.
Page 15
AIR VALVE / CENTER SECTION DISASSEMBLY
Tools Required:
• 3/16" Hex Head Wrench
• 1/4" Hex Head Wrench
• Snap Ring Pliers
• O-Ring Pick
CAUTION: Before any maintenance or repair is attempted, the compressed air line
to the pump should be disconnected and all air pressure allowed to bleed from
the pump. Disconnect all intake, discharge, and air lines. Drain the pump fl uid to
fl ow into a suitable container. Be aware of hazardous effects of contact with your
process fl uid.
Step 1
Using a 3/16” hex head wrench,
loosen air valve bolts.
TT5049 EOM-PV20M 9/05 13 WILDEN PUMP & ENGINEERING, LLC
Step 2
Remove muffl er plate and air valve
bolts from air valve assembly to expose muffl er gasket for inspection.
Replace if necessary.
Step 3
Lift away the air valve assembly and
remove air valve gasket for inspection. Replace if necessary.
Page 16
AIR VALVE / CENTER SECTION DISASSEMBLY
Step 4
Remove the air valve end cap to expose the air valve spool by simply
lifting up on the end cap once the
air valve bolts are removed. Note:
Pro-Flo V™ air valve incorporates
an end cap at both ends of the air
valve.
Step 7
Remove pilot spool sleeve from enter section.
Step 5
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 entire assembly if necessary. Use caution when handling air
valve spool to prevent damaging seals.
Note: Seals should not be removed
from assembly. Seals are not sold separately.
Step 8
Identify the end of the pilot stool that
has been marked with a “center punch.”
Using an o-ring pick, gently remove the
o-ring from the opposite side of the pilot spool. Gently remove the pilot spool
from pilot spool sleeve and inspect for
nicks, gouges and wear. Replace pilot
sleeve or outer sleeve o-rings if necessary. During re-assembly, never insert
the pilot spool into the sleeve with the
“center punch” side fi rst. This end incorporates the urethane o-ring and will
be damaged if it slides over the ports
cut into the sleeve. Note: Seals should
not be removed from pilot spool. Seals
are not sold separately.
Step 6
Remove pilot sleeve retaining snap
ring on both sides of center section
with snap ring pliers.
Step 9
Check center section Glyd™ rings
for signs of wear. If necessary,
remove the Glyd™ rings with an
o-ring pick and replace.
WILDEN PUMP & ENGINEERING, LLC 14 TT5049 EOM-PV20M 9/05
Page 17
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 bore to
ensure no damage is done to new shaft 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.
Profl o V™ Maximum Torque Specifi cations
Description of Part Torque
Air Valve 13.5 N•m (120 in-lbs)
Outer Piston 135.6 N•m (100 ft-lbs)
Diaphragm Ring & Outer Piston Assembly 18.9 N•m (14 ft-lbs)
Center Block Assembly 27.1 N•m (20 ft-lbs)
Large Clamp Bands 61.0 N•m (45 ft-lbs)
Small & Medium Clamp Bands 17.6 N•m (13 ft-lbs)
U-Bolt 44.7 N•m (33 ft-lbs)
Prime Plug 105.8 N•m (78 ft-lbs)
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 fi ngers pull down on the top portion of
the seal to form kidney bean shape. (See Figure B.)
• Lightly clamp the pliers together to hold the seal into
the kidney shape. Be sure to pull the seal into as tight
of a kidney shape as possible, this will allow the seal to
travel down the bushing bore easier.
• With the seal clamped in the pliers, insert the seal into
the bushing bore and position the bottom of the seal
into the correct groove. Once the bottom of the seal is
seated in the groove, release the clamp pressure on the
pliers. This will allow the seal to partially snap back to
its original shape.
• After the pliers are removed, you will notice a slight
bump in the seal shape. Before the seal can be properly
resized, the bump in the seal should be removed as
much as possible. This can be done with either the
Phillips screwdriver or your 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.
• 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 A
SHAFT SEAL
TAPE
TT5049 EOM-PV20M 9/05 15 WILDEN PUMP & ENGINEERING, LLC
Figure B
SHAFT SEAL
NEEDLE NOSE
PLIERS
TAPE
Page 18
WILDEN PUMP & ENGINEERING, LLC 16 TT5049 EOM-PV20M 9/05
Page 19
NOTES
TT5049 EOM-PV20M 9/05 17 WILDEN PUMP & ENGINEERING, LLC
Page 20
Section 8 exploded view & parts listing
Section 8
EXPLODED VIEW & PARTS LISTING
PV20 ORIGINAL METAL
Rubber/TPE/Ultra-Flex™-Fitted EXPLODED VIEW
8
11
13
6
24
5
7
9
1
4
41
25
2
3
12
10
30
31
14
16 13
15
33
34
19
35
32
22
21
20
17
15
18
46
16
14
38
37
39
43
28
29
27
23
45
26
36
44
40
42
46
WILDEN PUMP & ENGINEERING, LLC 18 TT5049 EOM-PV20M 9/05
Page 21
EXPLODED VIEW & PARTS LISTING
PV20 ORIGINAL METAL
ITEM Description Qty
1 Pro-Flo V™ Air Valve Assembly 1 04-2030-01
2 O-ring (-225), End Cap
3 End Cap, Pro-Flo V
4 Screw, Shc, Air Valve (1/4”-20 X 4-1/2”) 4 01-6000-03
5 Muffler Plate, Pro-Flo V™ 1 04-3185-01
6 Gasket, Muffler Plate, Pro-Flo V™ 1 04-3502-52
7 Gasket, Air Valve, Pro-Flo V™ 1 04-2620-52
8 Center Block, PV15 1 15-3120-01
9 Removable Pilot Sleeve Assembly 1 15-3884-99
10 Pilot Spool Retaining O-ring 2 15-2650-49-700
11 Shaft Seal 4 15-3210-55-225
12 Gasket, Center Block, Pro-Flo V™ 2 04-3529-52
13 Shaft 1 20-3810-09
Shaft, Ultra-Flex™ 1 20-3841-09
14 Piston, Outer 2 20-4550-02
Piston, Outer, Ultra-Flex™ 2 20-4560-02
15 Piston, Inner 2 15-3700-01
Piston, Inner, Ultra-Flex™ 2 15-3760-08
16 Washer, Inner Piston Back-Up 2 15-6850-08
17 Piston Assembly — Screw (Rubber/TPE only) 12 15-6130-08
18 Piston Assembly — Washer (Rubber/TPE only) 12 15-6740-08-50
19 Air Chamber 2 15-3660-01
20 Air Chamber - Screw 8 15-6130-08
21 Air Chamber - Washer 8 15-6740-08-50
22 Retaining Ring 2 04-3890-03
23 Liquid Chamber 2 20-5000-02
24 Tee Manifold 2 20-5160-02
25 Manifold Gaskets 8 *
26 Elbow 4 20-5220-02
27 Pot 4 20-5460-02
28 Plate 4 20-5480-02
29 Plate O-Ring 4 *
30 Wing Nut 8 20-6690-02
31 Wing Nut Stud 8 20-6160-08
32 Foot 2 20-5540-02
33 U-Bolt 2 20-6300-08
34 U-Bolt Nut 8 15-6420-08
35 U-Bolt Lock Washer 4 20-6750-08
36 Pipe Plug — 3/4” 4 20-7010-07
37 Large Clamp Band Assy. 2 15-7300-03
38 Large Carriage Bolt
39 Large Hex Nut 2 4 15-6420-03
40 Medium Clamp Band Assy. 4 20-7200-03
41 Small Clamp Band Assy. 8 20-7100-03
42 Medium Carriage Bolt
43 Medium Hex Nut
44 Valve Ball 4 *
45 Valve Ball Seat 4 *
46 Diaphragm 2 *
Muffler (Not shown) 1 15-3510-99R
* Refer to Elastomer Chart
1
Items 2 & 3 included with Item 1
2
Items 38 & 39 included with Item 37
3
Items 42 & 43 included with Items 40 & 41
All boldface items are primary wear parts.
1
1
2
4 15-6120-03
3
24 04-6070-03
3
24 08-6400-03
Rubber/TPE/Ultra-Flex™-Fitted PARTS LISTING
PV20/WWAAA
P/N
2 04-2390-52-700
2 04-2340-01
TT5049 EOM-PV20M 9/05 19 WILDEN PUMP & ENGINEERING, LLC
Page 22
Section 9
ELASTOMER OPTIONS
PV20 ORIGINAL™ METAL PUMPS
ULTRA-FLEX™
MATERIAL DIAPHRAGM
Polyurethane 15-1010-50 N/A 20-1080-50 20-1120-50 N/A N/A
Neoprene 15-1010-51 15-1020-51 N/A N/A N/A N/A
Buna-N 15-1010-52 15-1020-52 N/A N/A N/A N/A
Viton 15-1010-53 15-1020-53 N/A 20-1120-53 20-1250-53 20-1400-53
Nordel (EPDM) 15-1010-54 15-1020-54 N/A N/A N/A 20-1400-54
Tefl on (PTFE) N/A N/A 20-1080-55 N/A N/A N/A
Sanifl ex™ 15-1010-56 N/A N/A N/A N/A N/A
Wil-fl ex™ 15-1010-58 N/A N/A N/A N/A N/A
DIAPHRAGM VALVE BALL VALVE SEAT PLATE O-RING
MANIFOLD
GASKET
WILDEN PUMP & ENGINEERING, LLC 20 TT5049 EOM-PV20M 9/05
Page 23
NOTES
TT5049 EOM-PV20M 9/05 21 WILDEN PUMP & ENGINEERING, LLC
Page 24
WILDEN PUMP & ENGINEERING, LLC 22 TT5049 EOM-PV20M 9/05
Page 25
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 fi ve (5) years from date of installation or
six (6) years from date of manufacture, whichever comes fi rst. 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 fi tness for any particular purpose. No distributor or other
pe r son is a uthorized to as sume any liabilit y or obligati on f or W ild en Pump and Engin eering, LLC other than ex pres sly
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 Fax E-mail Web Address
Number of pumps in facilit y? Number of Wilden pumps?
Types of pumps in facility (check all that apply) :
Media being pumped?
Other
Diaphragm
Centrifugal
Gear
Submersible
Lobe
How did you hear of Wilden Pump?
Other
NOTE: WARRANTY VOID IF PAGE IS NOT FA XED TO WILDEN
Trad e Jou r nal
Trade Show
ONCE COMPLETE, FAX TO (909) 783-3440
WILDEN PUMP & ENGINEERING, LLC
Internet/E-mail
Distributor
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