Wilden Original Series Troubleshooting guide

METAL PUMPS
TZ15
Original™ Series
EOM
Engineering
Operation &
Maintenance
WIL-16080-E-01
Where Innovation Flows.

TABLE OF CONTENTS
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NON
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U.S. Clean Air Act
Amendments of 1990
SECTION 1 CAUTIONS—READ FIRST! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SECTION 2 WILDEN® PUMP DESIGNATION SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . 2
SECTION 3 HOW IT WORKS—PUMP DISTRIBUTION SYSTEM. . . . . . . . . . . . . . . . . . . .3
SECTION 4 DIMENSIONAL DRAWING(S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
SECTION 5 A. PERFORMANCE
Rubber-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
TPE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
PTFE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Ultra-FlexTM-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
B. SUCTION LIFT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
SECTION 6 SUGGESTED INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Operation/Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
SECTION 7 PUMP DISASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Air Valve/Center Block Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Reassembly Hints & Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
SECTION 8 EXPLODED VIEW AND PARTS LISTING . . . . . . . . . . . . . . . . . . . . . . . . . 18
TZ15 Metal Rubber/TPE/PTFE/Ultra-FlexTM-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
SECTION 9 ELASTOMER OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

WIL-16080-E-01 1WILDEN PUMP & ENGINEERING, LLC
CAUTIONS — READ FIRST!
Section 1
TEMPERATURE LIMITS:
Polypropylene 0°C to 79°C 32°F to 175°F
PVDF –12°C to 107°C 10°F to 225°F
Carbon-filled Acetal –28.9°C to 65.6°C –20°F to 150°F
Nylon –17.8°C to 93.3°C 0°F to 200°F
Neoprene –17.8°C to 93.3°C 0°F to 200°F
Buna-N –12.2°C to 82.2°C 10°F to 180°F
EPDM –51.1°C to 137.8°C –60°F to 280°F
Viton® –40°C to 176.7°C –40°F to 350°F
Wil-Flex™ –40°C to 107.2°C –40°F to 225°F
Polyurethane 12.2°C to 65.6°C 10°F to 150°F
Saniflex™ –28.9°C to 104.4°C –20°F to 220°F
PTFE 4.4°C to 104.4°C 40°F to 220°F
Fluoro-Seal™ –40°C to 232°C –40°F to 450°F
CAUTION: When choosing pump materials, be sure to
check the temperature limits for all wetted compo-
nents. Example: Viton® has a maximum limit of 176.7°C
(350°F) but polypropylene has a maximum limit of
only 79°C (175°F).
CAUTION: Maximum temperature limits are based
upon mechanical stress only. Certain chemicals will
significantly reduce maximum safe operating tem-
peratures. Consult engineering guide for chemical
compatibility and temperature limits.
CAUTION: Always wear safety glasses when operating
pump. If diaphragm rupture occurs, material being
pumped may be forced out air exhaust.
WARNING: Prevention of static sparking — If static
sparking occurs, fire or explosion could result. Pump,
valves, and containers must be properly grounded
when handling flammable fluids and whenever dis-
charge of static electricity is a hazard.
CAUTION: Do not exceed 8.6 bar (125 psig) air supply
pressure.
CAUTION: Before any maintenance or repair is at-
tempted, 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 pipe line debris is
clear. Use an in-line air filter. A 5 (micron) air filter is
recommended.
NOTE: Tighten clamp bands and retainers prior to
installation. Fittings may loosen during transportation.
NOTE: When installing PTFE diaphragms, it is impor-
tant to tighten outer pistons simultaneously (turning
in opposite directions) to ensure tight fit.
NOTE: Before starting disassembly, mark a line from
each liquid chamber to its corresponding air chamber.
This line will assist in proper alignment during reas-
sembly.
CAUTION: Verify the chemical compatibility of the
process and cleaning fluid to the pump’s component
materials in the Chemical Resistance Guide (see E4).
CAUTION: When removing the end cap using com-
pressed air, the air valve end cap may come out with
considerable force. Hand protection such as a padded
glove or rag should be used to capture the end cap.
NOTE: TZ-Series pumps do not need lubrication.

WILDEN PUMP & ENGINEERING, LLC 2WIL-16080-E-01
PUMP DESIGNATION SYSTEM
Section 2
NOTE: Most elastomeric materials use colored dots for identification.
NOTE: Not all models are available with all material options.
Hytrel® and Viton® are registered trademarks of DuPont Dow Elastomers.
MODEL
TZ15 =76 mm (3")
WETTED PARTS / OUTER PISTON
AA = ALUMINUM / ALUMINUM
WM = DUCTILE IRON / MILD STEEL
AIR CHAMBERS
A = ALUMINUM
CENTER BLOCK
A = ALUMINUM
AIR VALVE
A = ALUMINUM
DIAPHRAGMS
BNS = BUNA-N (red dot)
EPS = EPDM (blue dot)
NES = NEOPRENE (green dot)
BNU = BUNA-N, ULTRA-FLEX™
(red dot)
EPU = EPDM, ULTRA-FLEX™
(blue dot)
NEU = NEOPRENE, ULTRA-FLEX™
(green dot)
VTU = VITON, ULTRA-FLEX™
(white dot)
PUS = POLYURETHANE
VTS = VITON (white dot)
FSS = SANIFLEX™ [Hytrel® (cream)]
TNU = PTFE W/ NEOPRENE BACK-UP
TEU = PTFE W/ EPDM BACK-UP
TSU = PTFE W/ SANIFLEX™ BACK-UP
WFS = WIL-FLEX™ (orange dot)
VALVE BALLS
BN = BUNA-N (red dot)
NE = NEOPRENE (green dot)
PU = POLYURETHANE
VT = VITON (white dot)
EP = EPDM (blue dot)
FS = SANIFLEX™ [Hytrel® (cream)]
TF = PTFE
WF = WIL-FLEX™ (orange dot)
VALVE SEAT
BN = BUNA-N (red dot)
NE = NEOPRENE (green dot)
PU = POLYURETHANE
VT = VITON (white dot)
EP = EPDM (blue dot)
FS = SANIFLEX™ [Hytrel® (cream)]
A = ALUMINUM
S = STAINLESS STEEL
WF = WIL-FLEX™ (orange dot)
VALVE SEAT ORING
TF = PTFE
TZ15 METAL
76 mm (3") Pump
Maximum Flow Rate:
909 LPM (240 GPM)
LEGEND
MATERIAL CODES
SPECIALTY CODES
0014 BSPT Inlet & Discharge
MODEL VALVE SEAT SPECIALTY
ORINGS CODE (required)
VALVE SEAT
VALVE BALLS
DIAPHRAGMS
AIR VALVE
CENTER BLOCK
AIR CHAMBERS
WETTED PARTS/OUTER PISTON
TZ15 / XXXXX / XXX / XX / XXX / XXXX

WIL-16080-E-01 3WILDEN PUMP & ENGINEERING, LLC
Section 3
HOW IT WORKS—PUMP DISTRIBUTION SYSTEM
The Wilden® diaphragm pump is an air-operated, positive displacement, self-priming pump. These drawings show the 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 The air valve directs pressur-
ized air to the back side of diaphragm A.
The compressed air is applied directly to
the liquid column separated by elasto-
meric diaphragms. The diaphragm acts
as a separation membrane between the
compressed air and liquid, balancing the
load and removing mechanical stress
from the diaphragm. The compressed
air moves the diaphragm away from the
center block of the pump. The oppo-
site diaphragm is pulled in by the shaft
connected to the pressurized diaphragm.
Diaphragm B is on its suction stroke; air
behind the diaphragm has been forced
out to the atmosphere through the
exhaust port of the pump. The movement
of diaphragm B toward the center block
of the pump creates a vacuum within
chamber B. Atmospheric pressure forces
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).
FIGURE 2 When the pressurized
diaphragm, diaphragm A, reaches the
limit of its discharge stroke, the air valve
redirects pressurized air to the back
side of diaphragm B. The pressurized
air forces diaphragm B away from the
center block while pulling diaphragm A
to the center block. Diaphragm B is now
on its discharge stroke. Diaphragm B
forces the inlet valve ball onto its seat
due to the hydraulic forces developed in
the liquid chamber and manifold of the
pump. These same hydraulic forces lift
the discharge valve ball off its seat, while
the opposite discharge valve ball is forced
onto its seat, forcing fluid to flow through
the pump discharge. The movement of
diaphragm A toward the center block of
the pump creates a vacuum within liquid
chamber A. Atmospheric pressure forces
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.
FIGURE 3 At completion of the stroke,
the air valve again redirects air to the
back side of diaphragm A, which starts
diaphragm B on its exhaust stroke. As
the pump reaches its original starting
point, each diaphragm has gone through
one exhaust and one discharge stroke.
This constitutes one complete pumping
cycle. The pump may take several cycles
to completely prime depending on the
conditions of the application.
LEFT STROKE
➤
➤
RIGHT STROKE MID STROKE

WILDEN PUMP & ENGINEERING, LLC 4WIL-16080-E-01
Section 4
DIMENSIONAL DRAWING
DIMENSIONS
ITEM METRIC (mm) STANDARD (inch)
A 505 19.9
B 58 2.3
C 762 30.0
D 823 32.4
E 419 16.5
F 71 2.8
G 69 2.7
H 312 12.3
J 427 16.8
K 361 14.2
L 305 12.0
M 259 10.2
N 282 11.1
P 15 0.6
R 71 2.8
TZ15 METAL
7.62 mm (3") FNPT
76 mm 3" FNPT
19 mm
3/4" FNPT
AIR INLET
25 mm 1" FNPT
EXHAUST
76 mm 3" FNPT 
ALUM.
STAINLESS STEEL & CAST IRON
ALUMINUM
BSPT threads available.

WIL-16080-E-01 5WILDEN PUMP & ENGINEERING, LLC
Section 5A
PERFORMANCE
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 performance curve.
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 performance curve.
TZ15 METAL
TPEFITTED
Height....................... 810 mm (31.9")
Width ....................... 432 mm (17.0")
Depth . . . . . . . . . . . . . . . . . . . . . . . 279 mm (11.0")
Ship Weight ....... Aluminum 53 kg (116 lbs.)
Cast Iron 91 kg (200 lbs.)
Air Inlet ....................... 19 mm (3/4")
Inlet............................. 76 mm (3")
Outlet ........................... 76 mm (3")
Suction Lift ................. 5.9 m Dry (19.3')
9.0 m Wet (29.5')
Disp. Per Stroke .............. 5.2 l (1.38 gal.)1
Max. Flow Rate .......... 907 lpm (240 gpm)
Max. Size Solids .............. 10 mm (25/64")
1Displacement per stroke was calculated at 4.8 bar (70
psig) air inlet pressure against a 2 bar (30 psig) head
pressure.
EXAMPLE: To pump 379 lpm (100 gpm)
against a pressure of 4.1 bar (60 psi) requires
5.5 bar (80 psig) and 182.0 Nm3/h (107 scfm)
air consumption. (See dot on chart.)
CAUTION: Do not exceed 8.6bar (125psig)
air supply pressure.
TZ15 METAL
RUBBERFITTED
Height........................810 mm (31.9")
Width ........................432 mm (17.0")
Depth . . . . . . . . . . . . . . . . . . . . . . . . 279 mm (11.0")
Ship Weight ....... Aluminum 53 kg (116 lbs.)
Cast Iron 91 kg (200 lbs.)
Air Inlet ........................19 mm (3/4")
Inlet..............................76 mm (3")
Outlet ............................76 mm (3")
Suction Lift ..................6.1 m Dry (19.9')
9.0 m Wet (29.5')
Disp. Per Stroke ...............5.3 l (1.40 gal.)1
Max. Flow Rate ........... 909 lpm (240 gpm)
Max. Size Solids ...............10 mm (25/64")
1Displacement per stroke was calculated at 4.8 bar (70
psig) air inlet pressure against a 2 bar (30 psig) head
pressure.
EXAMPLE: To pump 549 lpm (145 gpm)
against a pressure of 2.8 bar (40 psi) requires
5.5 bar (80 psig) and 226.1 Nm3/h (133 scfm)
air consumption. (See dot on chart.)
CAUTION: Do not exceed 8.6 bar (125 psig)
air supply pressure.

WILDEN PUMP & ENGINEERING, LLC 6WIL-16080-E-01
PERFORMANCE
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 performance curve.
TZ15 METAL
ULTRAFLEXTM FITTED
Height....................... 810 mm (31.9")
Width ....................... 432 mm (17.0")
Depth . . . . . . . . . . . . . . . . . . . . . . . 279 mm (11.0")
Ship Weight ....... Aluminum 53 kg (116 lbs.)
Cast Iron 91 kg (200 lbs.)
Air Inlet ....................... 19 mm (3/4")
Inlet............................. 76 mm (3")
Outlet ........................... 76 mm (3")
Suction Lift ................. 6.1 m Dry (19.9')
9.0 m Wet (29.5')
Disp. Per Stroke .............. 5.2 l (1.38 gal.)1
Max. Flow Rate .......... 894 lpm (236 gpm)
Max. Size Solids .............. 10 mm (25/64")
1Displacement per stroke was calculated at 4.8 bar (70
psig) air inlet pressure against a 2 bar (30 psig) head
pressure.
EXAMPLE: To pump 606 lpm (160 gpm)
against a pressure of 1.4 bar (20 psi) requires
4.1 bar (60 psig) and 251.6 Nm3/h (148 scfm)
air consumption. (See dot on chart.)
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 performance curve.
TZ15 METAL
PTFE FITTED
Height....................... 810 mm (31.9")
Width ....................... 432 mm (17.0")
Depth . . . . . . . . . . . . . . . . . . . . . . . 279 mm (11.0")
Ship Weight ....... Aluminum 53 kg (116 lbs.)
Cast Iron 91 kg (200 lbs.)
Air Inlet ....................... 19 mm (3/4")
Inlet............................. 76 mm (3")
Outlet ........................... 76 mm (3")
Suction Lift ................. 5.3 m Dry (17.3')
9.0 m Wet (29.5')
Disp. Per Stroke .............. 5.2 l (1.38 gal.)1
Max. Flow Rate .......... 735 lpm (194 gpm)
Max. Size Solids .............. 10 mm (25/64")
1Displacement per stroke was calculated at 4.8 bar (70
psig) air inlet pressure against a 2 bar (30 psig)head
pressure.
EXAMPLE: To pump 216 lpm (57 gpm)
against a pressure of 3.5 bar (50 psi) requires
4.1 bar (60 psig) and 130.9 Nm3/h (77 scfm) air
consumption. (See dot on chart.)
CAUTION: Do not exceed 8.6bar (125psig)
air supply pressure.

WIL-16080-E-01 7WILDEN PUMP & ENGINEERING, LLC
Section 5B
SUCTION LIFT CURVE
TZ15 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 which can affect your
pump’s operating characteristics. The number
of intake and discharge elbows, viscosity of
pumping fluid, elevation (atmospheric pres-
sure) and pipe friction loss all affect the
amount of suction lift your pump will attain.

WILDEN PUMP & ENGINEERING, LLC 8WIL-16080-E-01
SUGGESTED INSTALLATION
Section 6
INSTALLATION: Months of careful planning, study and selection
efforts can result in unsatisfactory pump performance if installa-
tion 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 should be situated on the production floor.
Multiple installations with conflicting requirements can result in
congestion of utility areas, leaving few choices for siting additional
pumps.
Within the framework of these and other existing conditions, every
pump should be located in such a way that the following key
factors are balanced against each other to maximum advantage.
ACCESS: First of all, the pump’s location should be easily 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 downtime.
AIR SUPPLY: Every pump location should have an air line large
enough to supply the volume of air that is necessary to achieve
the desired pumping rate. For best results, the pumps should use
a 5-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 pump 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 determined 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 specification
when using the standard Wilden® muffler element. 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 ensure that loss-of-prime troubles will be elimi-
nated. 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 concerns regarding each possible location have
been evaluated. The impact of current and future installations
should be considered ahead of time in order to make sure that
inadvertent restrictions are not created for any remaining sites.
The best place possible to locate the pump will be a site featuring
the shortest and straightest hook-up of suction and discharge
piping. Unnecessary elbows, bends and fittings should be avoided.
Pipe sizes should be selected so as to keep friction losses within
practical limits. All piping should be supported independently of
the pump. In addition, the piping should be aligned so as to avoid
placing stresses on the pump fittings.
Flexible hose or expansion joints can be installed to aid in absorb-
ing the force created by the natural reciprocating action of the
pump. If the pump is to be bolted down to a solid foundation, a
mounting pad that is placed between the pump and the foun-
dation will 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
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, be sure that
all connections are air-tight and that the suction lift is within the
model’s operational ability.
NOTE: Materials of construction and elastomer materials have an
effect on suction-lift parameters.
When pumps are installed in applications involving flooded
suction of suction head pressures, a gate valve should be installed
in the suction line to permit closing of the line for pump service.
Wilden® TZ series pumps cannot be used in submersible appli-
cations. For submersible applications requiring a single point
exhaust, please consider Wilden Pro-Flo X Series pumps.
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)
or higher.
BLOW OUT AIR LINE FOR 10 TO 20 SECONDS BEFORE ATTACHING
TO PUMP TO MAKE SURE ALL PIPE LINE DEBRIS IS CLEAR. ALWAYS
USE AN IN-LINE AIR FILTER.
PUMPS SHOULD BE THOROUGHLY FLUSHED WITH WATER BEFORE
INSTALLING INTO PROCESS LINES. FDA AND USDA PUMPS
SHOULD BE CLEANED AND/OR SANITIZED BEFORE USE ON EDIBLE
PRODUCTS.
CAUTION: DO NOT EXCEED 8.6 BAR (125 PSIG) AIR-SUPPLY PRES-
SURE.
AIR-OPERATED PUMPS: To stop the pump from operating in
an emergency situation, simply close the “shut off” valve (user
supplied) that is installed in the air-supply line. A properly func-
tioning valve will stop the air supply to the pump, therefore halt-
ing output. The shut-off valve should be located far enough away
from the pumping equipment so that it can be reached safely in
an emergency situation.
NOTE: In the event of a power failure, the shut-off valve should be
closed if the restarting of the pump is not desired once power is
regained.

WIL-16080-E-01 9WILDEN PUMP & ENGINEERING, LLC
SUGGESTED INSTALLATION
OPERATION: Wilden® TZ Series pumps do not require in-line lubri-
cation. The pump discharge rate can be controlled by limiting the
volume and/or pressure of the air supply to the pump (preferred
method). An air regulator is used to regulate air pressure. A needle
valve is used to regulate volume. The 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. 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. At this point, the
pump has reached a “deadhead” condition and can be restarted
by reducing the fluid discharge pressure or increasing the air inlet
pressure. Wilden® pumps run solely on compressed air and do not
generate heat, therefore the temperature of the process fluid 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 the
process fluid all affect the parts life of a Wilden® pump. Periodic
inspections have been found to offer the best means for prevent-
ing unscheduled pump downtime. Personnel familiar with the
pump’s construction, operation 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.
SUGGESTED OPERATION & MAINTENANCE
COMBINATION
FILTER &
REGULATOR
GUAGE
(OPTIONAL)
EQUALIZER®
SURGE DAMPENER
(OPTIONAL)
MUFFLER
PIPE CONNECTION
(STYLE OPTIONAL)
FLEXIBLE
CONNECTION
SHUT OFF
VALVE
DISCHARGE
SUCTION
AIR
SHUT
OFF
VALVE NEEDLE
VALVE
Air Operated Pumps: To stop the pump from operating in an emergency situation,
simply close the “shut off” valve (user supplied) installed in the air supply line. A
properly functioning valve will stop the air supply to the pump, therefore stopping
output. This shut off valve should be located far enough away from the pumping
equipment such that it can be reached safely in an emergency situation.
Note: In the event of a power failure, the shut off valve should be closed, if the
restarting of the pump is not desirable once power is regained.

WILDEN PUMP & ENGINEERING, LLC 10 WIL-16080-E-01
TROUBLESHOOTING
PUMP WILL NOT RUN OR RUNS SLOWLY.
1. Check for sticking air valve. If so, wash air
valve interior with soap and water.
2. Check for a worn-out air valve. Consult factory for
assistance if you suspect an air valve is worn beyond
working tolerances and must be replaced.
3. Check center block Glyd™ rings. If worn excessively,
they will not seal and air will simply flow through the
pump and out of the air exhaust port. Use only Wilden®
Glyd™ rings as they are of special construction.
4. Check for rotating piston in air valve. Ensure one
air-valve end cap features an anti-rotation pin.
PUMP RUNS BUT LITTLE OR
NO PRODUCT FLOWS.
1. Check for pump cavitation. Slow pump speed down
to match thickness of material being pumped.
2. Check for sticking ball check valves. If material
being pumped is not compatible with pump elas-
tomers, swelling may occur. Replace ball check
valves and O-rings with the proper elastomers.
3. Check to make sure all suction connections are airtight,
especially the clamp band around intake balls.
PUMP AIR VALVE FREEZES.
1. Check for excessive moisture in compressed air. If necessary,
either install a dryer or hot-air generator for compressed air.
AIR BUBBLES IN PUMP DISCHARGE.
1. Check for ruptured diaphragm.
2. Check tightness of clamp bands, especially at intake manifold.
PRODUCT COMES OUT OF
AIR EXHAUST PORT.
1. Check for ruptured diaphragm.
2. Check for tightness of piston plates to pump shaft.
PUMP RATTLES.
1. Create false discharge head or suction lift.

WIL-16080-E-01 11 WILDEN PUMP & ENGINEERING, LLC
PUMP DISASSEMBLY
Section 7
Step 2.
Utilizing an appropriately-sized box wrench, remove the two (2)
small clamp bands or four (4) long carriage screws (depending on
model) that fasten the discharge manifold to the liquid chambers.
Step 3.
Remove discharge manifold and inspect valve balls, seats and
O-rings (if equipped).
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 liquid to flow into a suitable container. Be
aware of any hazardous effects that may occur upon contact with
the process fluid.
Step 1.
Before starting disassembly mark a line from each liquid chamber
to its corresponding air chamber. This line will assist in proper
realignment during reassembly.
All O-rings used in the pump are made of special material and
at any of sign of hardness should be replaced with only factory-
supplied parts.
NOTE: The model used for these instructions incorporates rubber
diaphragms, balls and seats. Instructions for model with PTFE
diaphragms, balls and seats are the same except where noted.
DISASSEMBLY INSTRUCTIONS FOR ORIGINAL™ SERIES TURBOFLO™ Z METAL PUMPS
Step 4.
If applicable, remove the clamp bands that fasten the intake
manifold to the liquid chambers. Lift the intake manifold away to
expose the valve balls and seats.

WILDEN PUMP & ENGINEERING, LLC 12 WIL-16080-E-01
PUMP DISASSEMBLY
Step 5.
Check valve balls, seats and O-rings for nicks, gouges, chemical
attack or abrasive wear. Replace worn parts with genuine Wilden®
parts for reliable performance. PTFE O-rings should be replaced
when reassembled.
Step 6.
If applicable, using a socket and box wrench, remove one set of
clamp bands that attach the liquid chamber to the center section
assembly.
Step 7.
Lift liquid chamber away from center section to expose diaphragm
and outer piston.
Step 8.
Use a box wrench, adjustable wrench or rotate the diaphragm by
hand to remove the diaphragm assembly.
NOTE: Due to varying torque values one of the following two
conditions may occur:

WIL-16080-E-01 13 WILDEN PUMP & ENGINEERING, LLC
PUMP DISASSEMBLY
Step 9A.
The outer piston, diaphragm and inner piston remain attached to
the shaft and the entire assembly can be removed from the center
section.
Step 10A.
To remove the diaphragm assembly from the shaft, secure the
shaft with soft jaws (a vise fitted with plywood or other suit-
able material) to ensure that the shaft is not nicked, scratched or
gouged. Using an adjustable wrench, remove diaphragm assem-
bly from the shaft. Inspect all parts for wear and replace with
genuine Wilden® parts, if necessary.
Step 9B.
The outer piston, diaphragm and inner piston separate from
the shaft, which remains connected to the opposite side of the
diaphragm assembly. Repeat disassembly instructions for oppo-
site liquid chamber. Inspect diaphragm assembly and shaft for
signs of wear or chemical attack. Replace all worn parts with genu-
ine Wilden® parts for reliable performance.
Step 10B. (if applicable)
Use a socket wrench to disassemble the diaphragm assembly, if
replacement is necessary.

WILDEN PUMP & ENGINEERING, LLC 14 WIL-16080-E-01
AIR VALVE / CENTER BLOCK DISASSEMBLY
The center section assembly consists of both the air valve body,
piston and the center block. The unique design of the air valve
relies only on differential pressure to initiate the diaphragm shift. It
is reliable and simple to maintain. The bushing in the center block,
along with the diaphragm, shaft, provides the “trigger” to tell the
air valve to shift. The following procedure will ensure that the air
valve on the Wilden® pump will provide long, trouble-free service.
AIR VALVE BODY AND PISTON
ASSEMBLY AND DISASSEMBLY:
The air valve body and piston can be disconnected from the pump
by removing the four (4) socket-head cap screws that attach it to
the center block. The piston should move freely and the ports in
the piston should line up with the ports on the face of the air valve
body. Inspect the piston for wear, nicks or gouges that could affect
pump operation.
If the piston does not move freely in the air valve, the entire air
valve should be immersed in a cleaning solution.
NOTE: Do not force the piston to move by inserting a metal object.
Soaking in a cleaning solution of soap and water should remove
any accumulation of sludge and grit that is preventing the air
valve piston from moving freely. If the air valve piston does not
move freely after the cleaning, the air valve should be disas-
sembled as follows:
Step 1.
Remove snap-ring from top end of air valve.
Step 2.
Apply a blast of air to the opposite end of the air valve piston face.
Step 3:
CAUTION: The air valve end cap may come out with considerable
force. Hand protection such as a padded glove or rag should be
used to capture the end cap.
Inspect the piston and cylinder bore for nicks and scoring. Small
nicks can usually be dressed out and the piston returned to service.
Make sure that the guide pin is straight and smooth or the piston
will not move freely in the cylinder. Clean out the anti-centering
pin holes located at each side of the piston. Pin holes are located
on each side of the annular groove on the top of the piston and
travel to each end. New O-rings should be installed on the end
caps. Lubricate the O-rings and install the end caps, assuring that
proper alignment of the piston and cylinder ports is maintained.
Reinstall the air valve to the center block of the pump. Tighten per
the torque specifications in “Reassembly Hints and Tips”.

WIL-16080-E-01 15 WILDEN PUMP & ENGINEERING, LLC
AIR VALVE / CENTER BLOCK DISASSEMBLY
P/N 0838000965
P/N 08321055225
Figure B
GROOVES IN
BUSHING WHICH
CONTAIN GLYD™ RINGS
GLYD™ RING REPLACEMENT:
When the Glyd™ rings become worn they will no longer seal and
must be replaced. Consult EOM Section 8 for replacement Glyd™
rings. See Figure A.
TYPICAL CENTER BLOCK ASSEMBLY:
The pump’s center block features a cast-in bronze bushing. The
bushing has 11 grooves cut on the inside diameter. There are
seven (7) Glyd™ rings that fit in these grooves. Since these Glyd™
rings form a part of the shifting function of the pump, it is neces-
sary that they be located in the proper grooves. When bushing
wear becomes excessive, a new center block must be used. See
Figure B.
ORING REPLACEMENT/CENTER SECTION
(For TZ1 Assembly Only)
The pump’s center section consists of a molded housing with a
bronze bushing. (Bushing is not removable.) This bushing has
grooves cut into the inside diameter. O-rings are installed in these
grooves. When the O-rings become worn or flat, they will no
longer seal and must be replaced. This is most easily accomplished
by using a tool called an O-ring pick, available through most
industrial supply companies.
An enhanced (01-3800-03-07) shaft should be utilized to maxi-
mize performance. The center section O-rings (01-3200-52) must
be installed in the appropriate grooves as shown (1, 3, 6, 8). See
Figure C.
Figure A
Figure C
1 3 6 8
SEAL CONFIGURATION

WILDEN PUMP & ENGINEERING, LLC 16 WIL-16080-E-01
REASSEMBLY HINTS & TIPS
ASSEMBLY:
Upon performing applicable maintenance to the air distribution
system, the pump can be reassembled. Please refer to the disas-
sembly instructions for photos and parts placement. To reassem-
ble the pump, follow the disassembly instructions in reverse order.
The air distribution system needs to be assembled first, then the
diaphragms and finally the wetted path. Please find the applicable
torque specifications on this page. The following tips will assist in
the reassembly process:
• Cleantheinsideofthecentersectionshaftbushingtoensure
no damage is done to the new seals.
• Stainless-steelboltsshouldbelubricatedtoreducethepossi-
bility of seizing during tightening.
• Ensureproperalignmentonthesealingsurfacesofintakeand
discharge manifolds.
• Liquid chambers are easier to attach when the diaphragm is
inverted. Prior to attaching the second water chamber, push
the diaphragm assembly so that it is as close as possible to the
center section.
• Levelthewaterchambersideoftheintake/dischargemanifold
to ensure a proper sealing surface. This is most easily accom-
plished by placing them on a flat surface prior to tightening
their clamp bands to the desired torque.
• BesuretotightenouterpistonssimultaneouslyonPTFE-tted
pumps to ensure proper torque values.
• Ensure proper alignment of mating surfaces between liquid
chambers and manifolds before tightening bolts.
• WhenassemblingPTFE-coatedhardware,careshouldbetaken
to keep the coating intact.
• WheninstallingGlyd™rings,theuseoftheWilden®RingerSeal
tool simplifies seal installation.
• ApplyasmallamountofLoctite®242tothesteelboreofthe
diaphragm assembly fasteners.
NOTE: Upon reassembly, ensure the air valve aligns with all ports
of the air valve/center block.
MAXIMUM TORQUE SPECIFICATIONS
Description of Part Metal Pumps
Air Valve 9.0 N•m (80 in-lbs)
Outer Piston 135.6 N•m (100 ft-lbs)
Small Clamp Band (PTFE-tted)) 15.5 N•m (137 in-lbs)
Small Clamp Band (Rubber-tted)) 5.6 N•m (50 in-lbs)
Large Clamp Band (All) 47.4 N•m (35 ft-lbs)
Air Chambers 27.1 N•m (20 ft-lbs)
Center Block Assembly 27.1 N•m (20 ft-lbs)
2C-Ring Inner Piston 18.9 N•m (14 ft-lbs)

WIL-16080-E-01 17 WILDEN PUMP & ENGINEERING, LLC
NOTES

WILDEN PUMP & ENGINEERING, LLC 18 WIL-16080-E-01
TZ15 METAL RUBBER/TPE/PTFE/ULTRAFLEXTMFITTED EXPLODED VIEW
Section 8
EXPLODED VIEW & PARTS LISTING
ULTRA-FLEX
PTFE
10
33
28
29
13
19
16
27
14 31
30
22
33
34
25
29
32
26
2
20
21
24
23
8
9
4
76
1
3
12
28
11
34
34
28
29 33
35
30
18
17
5