Dover Wilden Original Series Instruction Manual

T2
WIL-10210-E-02
REPLACES EOM T2P 8/02
EOM
Simplify your process
Engineering
Operation &
Maintenance
Original™Series PLASTIC Pumps

SECTION 1 CAUTIONS – READ FIRST! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
SECTION 2 PUMP DESIGNATION SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
SECTION 3 HOW IT WORKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
SECTION 4 DIMENSIONAL DRAWING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
SECTION 5 PERFORMANCE CURVES
Rubber-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
TPE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
PTFE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
SECTION 6 SUCTION LIFT CURVES & DATA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
SECTION 7 INSTALLATION AND OPERATION
A. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
B. Operation & Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
C. Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
SECTION 8 DIRECTIONS FOR DISASSEMBLY/REASSEMBLY
A. T2 PLASTIC Wetted Path Disassembly –Tools Required . . . . . . . . . . . . . . . . . . . . . . 10
B. Air Valve/Center Section – Disassembly, Cleaning, Inspection . . . . . . . . . . . . . . . . .13
C. Reassembly Hints &Tips. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
D. Gasket Kit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
SECTION 9 EXPLODED VIEW/PARTS LISTING
A. Rubber/TPE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
B. PTFE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
SECTION 10 ELASTOMER OPTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
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U.S. Clean Air Act
Amendments of 1990
TABLE OF CONTENTS

WIL-10210-E-02 7/06 1 WILDEN PUMP & ENGINEERING, LLC
Section 1
CAUTIONS – READ FIRST!
TEMPERATURE LIMITS*
Polypropylene 0°C to 79°C 32°F to 175°F
Carbon-Filled Acetal
-28.9ºC to 82.2ºC -20ºF to 225ºF
PTFE PFA -28.9ºC to 148.9ºC -20ºF to 300ºF
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 -51.1ºC to 137.8ºC -60ºF to 280ºF
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 148.9°C 40°F to 300°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
79.4°C (175°F).
CAUTION: Maximum temperature limits are based
upon mechanical stress only. Certain chemicals will
significantly reduce maximum safe operating tempera-
tures. Consult engineering guide for chemical compat-
ibility and temperature limits.
CAUTION: Always wear safety glasses when operat-
ing 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: Plastic series pumps are made of virgin
plastic and are not UV stabilized. Direct sunlight for
prolonged periods can cause deterioration of plastics.
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 pipe line debris is
clear. Use an in-line air filter. A 5µ (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 important
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 compressed
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.
CAUTION: Only explosion proof (NEMA 7) solenoid
valves should be used in areas where explosion proof
equipment is required.
NOTE: Non lube-free pumps must be lubricated.
Wilden suggests an arctic 5 weight oil (ISO grade 15).
Do not over-lubricate air supply. Over-lubrication will
reduce pump performance.
CAUTION: T2 PTFE-fitted pumps come standard from
the factory with expanded PTFE gaskets. (See Gasket
Kit Installation in Section 8D.)

WILDEN PUMP & ENGINEERING, LLC 2 WIL-10210-E-02 7/06
SPECIALTY CODES
0100 Wil-Gard II™ 110V
0102 Wil-Gard II™ sensor wires ONLY
0103 Wil-Gard II™ 220V
0206 PFA coated hardware,
Wil-Gard II™ sensor wires ONLY
0300 Without air valve
0400 T2R plastic
0402 T2R plastic, PFA coated hardware
0404 T2R plastic, DIN flange
0406 T2R plastic, PFA coated hardware, DIN flange
0415 T2R plastic, Wil-Gard II™ sensor wires ONLY
0416 T2R, PFA coated hardware,
Wil-Gard II™ sensor wires ONLY
0420 T2R plastic, Wil-Gard II™ 110V
0423 T2R plastic, PFA coated hardware,
Wil-Gard II™ 110V
0424 T2R plastic, Wil-Gard II™ 220V, DIN flange
0426 T2R plastic, PFA coated hardware,
Wil-Gard II™ 220V, DIN flange
0428 T2R plastic, Wil-Gard II™ 220V
0430 T2R plastic, SS outer pistons
0502 PFA coated hardware
0560 Split manifold
0561 Split manifold, PFA coated hardware
0563 Split manifold, discharge ONLY
0564 Split manifold, Inlet ONLY
0603 PFA coated hardware, Wil-Gard II™ 110V
0608 PFA coated hardware, Wil-Gard II™ 220V
0660 Split manifold, Wil-Gard II™ 110V
0661 Split manifold, PFA coated hardware,
Wil-Gard II™ 110V
Section 2
WILDEN PUMP DESIGNATION SYSTEM
T2 ORIGINAL™
PLASTIC
25 mm (1") Pump
Maximum Flow Rate:
114 LPM (30 GPM)
MATERIAL CODES
WETTED PARTS & OUTER PISTON
PP = POLYPROPYLENE /
POLYPROPYLENE
CENTER SECTION
PP = POLYPROPYLENE
AIR VALVE
B = BRASS
C = PFA COATED
N = NICKEL PLATED
DIAPHRAGMS
BNS = BUNA-N (Red Dot)
EPS = EPDM (Blue Dot)
FSS = SANIFLEX™
[Hytrel®(Cream)]
NES = NEOPRENE (Green Dot)
PUS = POLYURETHANE (Clear)
TEU = PTFE W/EPDM
BACK-UP (White)
TNU = PTFE W/NEOPRENE
BACK-UP (White)
VTS = VITON®(White Dot)
WFS = WIL-FLEX™ [Santoprene®
(Orange Dot)]
VALVE BALL
BN = BUNA-N (Red Dot)
EP = EPDM (Blue Dot)
FS = SANIFLEX™
[Hytrel®(Cream)]
NE = NEOPRENE (Green Dot)
PU = POLYURETHANE (Brown)
TF = PTFE (White)
VT = VITON®(White Dot)
WF = WIL-FLEX™ [Santoprene®
(Orange Dot)]
VALVE SEAT
K = PVDF
P = POLYPROPYLENE
VALVE SEAT O-RING
BN = BUNA-N
PU = POLYURETHANE (Brown)
TV = PTFE ENCAP. VITON®
WF = WIL-FLEX™ [Santoprene®]
LEGEND
T2 / XXXXX / XXX / XX / XXX / XXXX
O-RINGS
MODEL VALVE SEAT
VALVE BALLS
DIAPHRAGMS
AIR VALVE
CENTER SECTION
WETTED PARTS & OUTER PISTON
SPECIALTY
CODE
(if applicable)
NOTE: MOST ELASTOMERIC MATERIALS USE COLORED DOTS FOR INDENTIFICATION.
Viton®is registered trademarks of DuPont Dow Elastomers.

WIL-10210-E-02 7/06 3 WILDEN PUMP & ENGINEERING, LLC
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, balanc-
ing the load and removing mechani-
cal stress from the diaphragm. The
compressed air moves the diaphragm
away from the center block of the
pump. The opposite diaphragm is
pulled in by the shaft connected to the
pressurized diaphragm. Diaphragm B
is on its suction stroke; air behind the
diaphragm has been forced out to the
atmosphere through the exhaust port of
the pump. The movement of diaphragm
B toward the center block of the pump
creates a vacuum within chamber B.
Atmospheric pressure forces 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. Atmo-
spheric 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 pump-
ing cycle. The pump may take several
cycles to completely prime depending
on the conditions of the application.
RIGHT STROKE MID STROKE LEFT STROKE
Section 3
THE WILDEN PUMP – HOW IT WORKS

WILDEN PUMP & ENGINEERING, LLC 4 WIL-10210-E-02 7/06
Section 4
DIMENSIONAL DRAWING
6 mm (1/4") FNPT
AIR INLET
25 mm (1")
DIN (ANSI)
LIQUID INLET
25 mm (1")
DIN (ANSI) LIQUID
DISCHARGE
FLANGE
A
B
C
D
E
F
G
H
J
K
L
M
N P
R
DIMENSIONS
ITEM METRIC (mm) STANDARD (inch)
A297 11.7
B 74 2.9
C 163 6.4
D251 9.9
E 335 13.2
F 107 4.2
G 239 9.4
H 157 6.2
J 124 4.9
K 114 4.5
L 137 5.4
M 10 0.4
DIN ANSI
N 85 DIA. 3.1 DIA.
P 115 DIA. 4.3 DIA.
R 14 DIA. 0.6 DIA.
T2R Plastic

WIL-10210-E-02 7/06 5 WILDEN PUMP & ENGINEERING, LLC
T2R PLASTIC
RUBBER-FITTED
Height..................................335 mm (13.2")
Width................................... 297 mm (11.7")
Depth .................................... 239 mm (9.4")
Est. Ship Weight.....Polypropylene 8.26 kg (18 lbs)
Air Inlet......................................6 mm (1/4")
Inlet............................................ 25 mm (1")
Outlet ......................................... 25 mm (1")
Suction Lift ........................... 5.5 m Dry (18')
9.5 m Wet (31')
Displacement per
Stroke ....................... 0.38 l (0.100 gal.)1
Max. Flow Rate.................114 lpm (30 gpm)
Max. Size Solids .....................3.2 mm (1/8")
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 68.1 lpm (18 gpm)
against a discharge pressure head of 2.7
bar (40 psig) requires 4.1 bar (60 psig) and
20.4 Nm3/h (12 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.
T2R PLASTIC
TPE-FITTED
Height..................................335 mm (13.2")
Width................................... 297 mm (11.7")
Depth .................................... 239 mm (9.4")
Est. Ship Weight.....Polypropylene 8.26 kg (18 lbs)
Air Inlet......................................6 mm (1/4")
Inlet............................................ 25 mm (1")
Outlet ......................................... 25 mm (1")
Suction Lift ........................... 3.1 m Dry (10')
9.5 m Wet (31')
Displacement per
Stroke ....................... 0.39 l (0.104 gal.)1
Max. Flow Rate.................114 lpm (30 gpm)
Max. Size Solids .....................3.2 mm (1/8")
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 64.4 lpm (17 gpm)
against a discharge pressure head of 2.7
bar (40 psig) requires 4.1 bar (60 psig) and
20.4 Nm3/h (12 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.
Section 5
PERFORMANCE

WILDEN PUMP & ENGINEERING, LLC 6 WIL-10210-E-02 7/06
Section 6 SUCTION LIFT CURVES & DATA
Suction lift curves are calibrated for pumps operating at
1,000' (305 m) above sea level. This chart is meant to be a
guide only. There are many variables which can affect your
pump’s operating characteristics. The number of intake
and discharge elbows, viscosity of pumping fluid, elevation
(atmospheric pressure) and pipe friction loss all affect the
amount of suction lift your pump will attain.
PTFE
T2R PLASTIC
PTFE-FITTED
Height..................................335 mm (13.2")
Width................................... 297 mm (11.7")
Depth .................................... 239 mm (9.4")
Est. Ship Weight.....Polypropylene 8.26 kg (18 lbs)
Air Inlet......................................6 mm (1/4")
Inlet............................................ 25 mm (1")
Outlet ......................................... 25 mm (1")
Suction Lift ............................. 1.8 m Dry (6')
9.5 m Wet (31')
Displacement per
Stroke ....................... 0.21 l (0.055 gal.)1
Max. Flow Rate.................102 lpm (27 gpm)
Max. Size Solids .....................3.2 mm (1/8")
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 49.2 lpm (13 gpm)
against a discharge pressure head of 2.7
bar (40 psig) requires 4.1 bar (60 psig) and
25.5 Nm3/h (15 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.
PERFORMANCE

WIL-10210-E-02 7/06 7 WILDEN PUMP & ENGINEERING, LLC
Section 7A
INSTALLATION
The Model T2R Plastic pump has a 25 mm (1") inlet and 1"
(25 mm) outlet and is designed for flows to 114 lpm (30 gpm).
The T2R Plastic pump is manufactured with wetted parts of
polypropylene. The center section of the T2R Plastic pump
is of polypropylene construction. The air distribution system
consists of a brass air valve body, aluminum air valve piston,
Glyd™ rings and a bronze center section bushing. A variety
of diaphragms, valve balls, valve seats, and rings are avail-
able to satisfy temperature, chemical compatibility, abrasion
and flex concerns.
The suction pipe size should be at least 25 mm (1") diam-
eter or larger if highly viscous material is being pumped.
The suction hose must be non-collapsible, reinforced type
as the T2 is capable of pulling a high vacuum. Discharge
piping should be at least 25 mm (1"); larger diameter can
be used to reduce friction losses. It is critical that all fittings
and connections are airtight or a reduction or loss of pump
suction capability will result.
For T2R Plastic models, Wilden offers 150 lbs. standard or
metric flanges. The following details should be noted when
mating these to pipe works:
• A 60–80 shore gasket that covers the entire flange face
should be used.
• The gasket should be between .075" and .175" thickness.
• Mating flanges with flat as opposed to raised surfaces
should be used for proper mechanical sealing.
• The flanges should be tightened to a minimum of 6.8 N-m
(5 ft-lbs) but no more than 13.5 N-m (10 ft-lbs).
INSTALLATION: Months of careful planning, study, and selec-
tion 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 instal-
lation process.
LOCATION: Noise, safety, and other logistical factors usu-
ally dictate that “utility” equipment be situated away from
the production floor. Multiple installations with conflicting
requirements can result in congestion of utility areas, leaving
few choices for siting of additional pumps.
Within the framework of these and other existing conditions,
every pump should be located in such a way that four key
factors are balanced against each other to maximum advan-
tage.
1. 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.
2. 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 (see pump performance chart). Use
air pressure up to a maximum of 8.6 bar (125 psig) (3.4 bar
[50 psig] on UL models) depending upon pumping require-
ments. The use of an air filter before the pump will ensure
that the majority of any pipeline contaminants will be elimi-
nated. For best results, the pumps should use an air filter,
regulator, and lubricator system.
3. ELEVATION: Selecting a site that is well within the pump’s
suction lift capability will assure that loss-of-prime troubles
will be eliminated. In addition, pump efficiency can be
adversely affected if proper attention is not given to elevation
(see pump performance chart).
4. PIPING: Final determination of the pump site should not
be made until the piping problems of each possible loca-
tion 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 the 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 inde-
pendently of the pump. In addition, it should line up without
placing stress on the pump fittings.
Expansion joints 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 foundation,
a mounting pad placed between the pump and foundation
will assist in minimizing pump vibration. Flexible connections
between the pump and rigid piping will also assist in mini-
mizing 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.
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.
The T2R can be used in submersible applications only when
both wetted and non-wetted portions are compatible with
the material being pumped. If the pump is to be used in a
submersible application, a hose should be attached to the
pump’s air exhaust and the exhaust air piped above the liquid
level.
If the pump is to be used in a self-priming application, be
sure that all connections are airtight and that the suction lift is
within the pump’s ability. Note: Materials of construction and
elastomer material have an effect on suction lift parameters.
Please refer to pump performance data.
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
0.8 bar (11 psig) and higher.
THE MODEL T2R WILL PASS 3.2 mm (1/8") SOLIDS. WHEN-
EVER THE POSSIBILITY EXISTS THAT LARGER SOLID
OBJECTS MAY BE SUCKED INTO THE PUMP, A STRAINER
SHOULD BE USED ON THE SUCTION LINE.
CAUTION: DO NOT EXCEED 8.6 BAR (125 PSIG) AIR
SUPPLY PRESSURE.
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

WILDEN PUMP & ENGINEERING, LLC 8 WIL-10210-E-02 7/06
Section 7B SUGGESTED OPERATION AND
MAINTENANCE INSTRUCTIONS
OPERATION: 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 regu-
late 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. 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 pres-
sure, 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 T2R pump runs solely on
compressed air and does not generate heat, therefore your
process fluid temperature will not be affected.
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.
MAINTENANCE AND INSPECTIONS: Since each applica-
tion 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.
AIR-OPERATED PUMPS: To stop the pump from operating in an
emergency situation, simply close the “shut-off” valve (user sup-
plied) 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 pump-
ing equipment such that it can be reached safely in an emergency
situation.
NOTE: In the event of a power failure, the shutoff valve should be
closed, if the restarting of the pump is not desirable once power is
regained.
®
®
SUGGESTED INSTALLATION

WIL-10210-E-02 7/06 9 WILDEN PUMP & ENGINEERING, LLC
Section 7C
TROUBLESHOOTING
Pump will not run or runs slowly.
1. Check air inlet screen and air filter for debris.
2. Check for sticking air valve, flush air valve in solvent.
3. Check for worn out air valve. If piston face in air valve is
shiny instead of dull, air valve is probably worn beyond
working tolerances and must be replaced.
4. Check center block Glyd™ rings. If worn excessively,
they will not seal and air will simply flow through pump
and out air exhaust. Use only Wilden Glyd™ rings as
they are of special construction.
5. Check for rotating piston in air valve.
6. Check type of lubricant being used. A higher viscosity
oil than suggested may cause the piston to stick or run
erratically. Wilden suggests the use of an oil with arctic
characteristics (ISO 15-5 wt.).
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 elastomers, swell-
ing may occur. Replace ball check valves and o-rings
with the proper elastomers.
3. Check to make sure all suction connections are air tight,
especially clamp bands around intake balls.
Pump air valve freezes.
1. Check for excessive moisture in compressed air. Either
install 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 air exhaust.
1. Check for diaphragm rupture.
2. Check tightness of piston plates to shaft.
Pump rattles.
1. Create false discharge head or suction lift.

WILDEN PUMP & ENGINEERING, LLC 10 WIL-10210-E-02 7/06
Tools Required:
• 1/2" Box Wrench
• 1/2" Socket
• 1/2" Socket Drive
• 2–1" Sockets or
Adjustable Wrench
• Adjustable Wrench
• Vise equipped with soft
jaws (such as plywood,
plastic or other suitable
material)
CAUTION: Before any maintenance or repair is attempted, the compressed air line to the
pump should be disconnected and all air pressure allowed to bleed from the pump. Disconnect
all intake, discharge, and air lines. Drain the pump by turning it upside down and allowing
any fluid to flow into a suitable container. Be aware of any hazardous effects of contact with
your process fluid. The Wilden model T2 has a 25 mm (1") inlet and 25 mm (1") outlet and is
designed for flows up to 114 lpm (30 gpm). The wetted path comes in polypropylene. The
single-piece center section, consisting of center block and air chambers, is molded of poly-
propylene or aluminum. The air valve body is manufactured of brass or high-tech engineered
thermoplastics. All o-rings used in the pump are of a special material and shore hardness that
should only be replaced with factory-supplied parts.
NOTE: The model used for these instructions incorporates rubber diaphragms, balls, and
seats. Models with PTFE diaphragms, balls and seats are the same except where noted.
Step 1. Figure 1
Before starting disassembly, mark a line from each liquid
chamber to its corresponding air chamber. This line will assist
in proper alignment during reassembly.
DISASSEMBLY:
Section 8A
DIRECTIONS FOR DISASSEMBLY/REASSEMBLY
Step 2. Figure 2
Using a screwdriver or other long, slim object, loosen the top
liquid retainers from the liquid chambers.

WIL-10210-E-02 7/06 11 WILDEN PUMP & ENGINEERING, LLC
5A
DIRECTIONS FOR DISASSEMBLY/REASSEMBLY
Step 6. Figure 6
Remove the bottom liquid retainer and
retainer o-rings, discharge valve balls,
seats and valve seat o-rings from the
liquid chamber and inspect for nicks,
gouges, chemical attack or abrasive
wear. Replace worn parts with genuine
Wilden parts for reliable performance.
Step 7. Figure 7
With a 1/2" box wrench, loosen the
large clamp bands that secure the liquid
chambers to the center section.
Step 8. Figure 8
Rotate the clamp bands so that they can
be removed.
Step 3. Figure 3
Remove the top liquid retainer to expose
the valve balls, valve seats and valve
seat o-rings.
Step 4. Figure 4
Remove the top liquid retainer and
retainer o-rings, discharge valve balls,
seats and valve seat o-rings from the
liquid chamber and inspect for nicks,
gouges, chemical attack or abrasive
wear. Replace worn parts with genuine
Wilden parts for reliable performance.
Step 5. Figure 5
Using a 1/2" socket driver, loosen the
bottom retainers.

WILDEN PUMP & ENGINEERING, LLC 12 WIL-10210-E-02 7/06
DIRECTIONS FOR DISASSEMBLY/REASSEMBLY
Step 9. Figure 9
After clamp bands are removed, pull liquid chambers apart.
Step 10. Figure 10
Remove tee section from liquid chamber and inspect o-rings
for signs of wear. Replace worn parts with genuine Wilden
parts for reliable performance.
Step 11. Figure 11
Using two 1" sockets, remove diaphragm
assembly from center section assembly.
Step 12. Figure 12
To remove the remaining diaphragm
assembly from the shaft, secure shaft
with soft jaws (a vise fitted with plywood
or other suitable material) to ensure shaft
is not nicked, scratched, or gouged.
Using an adjustable wrench, remove
diaphragm assembly from shaft. Inspect
all parts for wear and replace with genu-
ine Wilden parts if necessary.
Step 13. Figure 13
Inspect diaphragms, outer and inner
pistons and disc spring (not shown) for
signs of wear. Replace with genuine
Wilden parts if necessary.

WIL-10210-E-02 7/06 13 WILDEN PUMP & ENGINEERING, LLC
The air valve assembly consists of the air valve body and
piston. The unique design of the air valve relies only on dif-
ferential pressure to cause the air valve to 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 your 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 socket-head cap screws which
attach it to the center section. The piston in the air valve is
aluminum with a dark anodized coating. 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. The piston should also
appear to be dull black in color. If the piston appears to be a
shiny aluminum color, the air valve is probably worn beyond
working tolerances and should be replaced.
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 by inserting a metal object.) This
soaking should remove any accumulation of sludge and grit
which is preventing the air valve piston from moving freely.
If the air valve piston does not move freely after the above
cleaning, the air valve should be disassembled as follows:
Remove the snap ring from the top end of the air valve and
apply an air jet alternately to the two holes located in the face
of the air valve until the end cap is blown out.
[CAUTION: The air valve end cap may come out with con-
siderable force. Hand protection such as a padded glove or
a 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. Inspect the cylinder end caps. Make sure
that the guide pin is straight and smooth or the piston will not
move freely in the cylinder. Clean out anti-centering pin holes
located on 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 main-
tained. Use an oil with arctic characteristics (ISO 15-5wt).
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. Glyd™ o-rings are
installed in these grooves. When the Glyd™ rings become
worn, 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.
There are two versions of center sections: PRE-ENHANCED
(pumps manufactured before March 1, 1992) and ENHANCED
(pumps manufactured since March 1, 1992). An encircled let-
ter “E” stamped on the top of the center section denotes the
ENHANCED type center section (Figure C).
Please contact your local authorized distributor for
enhanced air distribution retrofit packages.
If the encircled “E” is present, an enhanced (02-3800-
09-07) shaft should be utilized to maximize performance.
The center section Glyd™ rings (02-3210-55-225) must be
installed in the appropriate grooves as shown (1, 3, 6, 8).
If the encircled “E” is not present, a pre-enhanced shaft
(02-3800-09 or 02-3820-09) must be utilized. An enhanced
(non-dented) shaft will not function correctly. The center
section o-rings (02-3200-52) must be installed in the appro-
priate grooves as shown (1, 3, 4, 6).
1 3 6 8
ENHANCED CONFIGURATION
ENHANCED SHAFT
1 3 4 6
PRE-ENHANCED CONFIGURATION
PRE-ENHANCED SHAFT
Figure C
*Refer to Section 8C for the required torque specifications.
GLYD™ RING REPLACEMENT / CENTER SECTION
Section 8B
AIR VALVE / CENTER SECTION — REPAIR / MAINTENANCE

WILDEN PUMP & ENGINEERING, LLC 14 WIL-10210-E-02 7/06
Section 8C
REASSEMBLY HINTS & TIPS
ASSEMBLY:
Upon performing applicable maintenance to the air distribu-
tion system, the pump can now be reassembled. Please
refer to the disassembly instructions for photos and parts
placement. To reassemble the pump, follow the disassem-
bly 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 speci-
fications on this page. The following tips will assist in the
assembly process.
• Clean the inside of the center section shaft bushing to
ensure no damage is done to new seals.
• Stainless bolts should be lubed to reduce the possibility
of seizing during tightening.
• Level the water chamber side of the intake/discharge
manifold to ensure a proper sealing surface. This is most
easily accomplished by placing them on a flat surface
prior to tightening their clamp bands to the desired
torque (see this page for torque specs).
• Be sure to tighten outer pistons simultaneously on
PTFE-fitted pumps to ensure proper torque values.
• Ensure proper mating of liquid chambers to manifolds
prior to tightening vertical bolts. Overhang should be
equal on both sides.
• Apply a small amount of Loctite 242 to the steel bore of
the shaft from the diaphragm assembly.
Section 8D GASKET KIT INSTALLATION
Step 1. Figure 1
Gently remove the adhesive covering
from the back of the PTFE tape. Ensure
that the adhesive strip remains attached
to the PTFE tape and is not removed
with the adhesive covering.
Step 2. Figure 2
Starting at any point, place the PTFE
tape directly on top of the diaphragm
bead. Press lightly on the tape to ensure
that the adhesive holds it in place during
assembly. Do not stretch the tape during
placement on the diaphragm.
Step 3. Figure 3
The ends of the tape should overlap
approximately 13 mm (1/2"). Proceed to
install the PTFE tape on the remaining
diaphragm.
PTFE-fitted T2R pumps require expanded PTFE material around
the diaphragm bead (P/N 02-9500-99). Carefully prepare seal-
ing surfaces by removing all debris and foreign matter from
diaphragm bead and all mating surfaces. If necessary, smooth
or deburr all sealing surfaces. Mating surfaces must be properly
aligned in order to ensure positive sealing characteristics.
MAXIMUM TORQUE SPECIFICATIONS
Description of Part Plastic Pumps
Air Valve 3.4 N•m (30 in-lbs)
Outer Piston — Rubber- and PTFE-fitted 27.1 N•m (20 ft-lbs)
Top and Bottom Retainers 14.1 N•m (125 in-lbs)
Large Clamp Band — Rubber-fitted 10.7 N•m (95 in-lbs)
Large Clamp Band — PTFE-fitted 14.1 N•m (125 in-lbs)

WIL-10210-E-02 7/06 15 WILDEN PUMP & ENGINEERING, LLC

WILDEN PUMP & ENGINEERING, LLC 16 WIL-10210-E-02 7/06
1
T2R PLASTIC Rubber-Fitted EXPLODED VIEW
Section 9A
EXPLODED VIEW/PARTS LISTING

WIL-10210-E-02 7/06 17 WILDEN PUMP & ENGINEERING, LLC
EXPLODED VIEW/PARTS LISTING
T2R PLASTIC Rubber-Fitted PARTS LISTING
Item
No. Part Description
Qty. Per
Pump
T2/PPPB/400 T2/PPPC/402
P/N P/N
1 Air Valve Assembly* 1 02-2000-07 02-2000-05
2 End Cap w/Guide 1 02-2301-23 02-2301-23
3 End Cap w/o Guide 1 02-2331-23 02-2331-23
4 End Cap O-Ring 2 02-3200-52-200 02-3200-52-200
5 Snap Ring 2 02-2650-03 02-2650-03
6 End Cap Cover 2 N/R 02-2420-55
7 End Cap Bolt 2 N/R 02-2450-22
8 Air Valve Gasket — Buna-N 1 02-2600-52 02-2600-52
9 Air Valve Bolt 1/4"-20 x 6" 4 02-6000-03 02-6000-05
10 Air Valve Nut 1/4"-20 4 04-6400-03 04-6400-05
11 Muffler Plate 1 02-3180-20 02-3180-20
12 Muffler Plate Gasket — Buna-N 1 02-3500-52-500 02-3500-52-500
13 Center Section 1 02-3151-20-225 02-3151-20-225
14 Center Section Glyd™ Ring 4 02-3210-55-225 02-3210-55-225
15 Shaft 1 02-3800-03-07 02-3800-03-07
16 Inner Piston 2 02-3700-08 02-3700-08
17 Outer Piston 2 02-4550-21-500 02-4550-21-500
18 Liquid Chamber 2 02-5001-20-400 02-5001-20-400
19 Manifold Tee Section12 02-5160-20-400 02-5160-20-400
20 Top Retainer 2 02-5411-20-400 02-5411-20-400
21 Bottom Retainer 2 02-5420-20-400 02-5420-20-400
22 Valve Seat 4 02-1120-20-400 02-1120-20-400
23 Valve Seat O-Ring** 4 * *
24 Retainer O-Ring** 4 * *
25 Valve Ball** 4 * *
26 Diaphragm** 2 * *
27 Back-up Diaphragm 2 N/R N/R
28 Tee Section O-Ring** 4 * *
29
Clamp Band Assembly (Incl. 30 & 31) 2 02-7300-03-400 02-7300-05-402
30 Clamp Band Bolt 5/16"-18 x 1-3/4" 4 08-6050-03-500 08-6050-05-500
31 Clamp Band Nut 5/16"-18 4 08-6400-03 08-6400-05
32 Muffler 1 02-3510-99 02-3510-99
33 Disc Spring 2 02-6802-08 02-6802-08
1DIN Flange: Polypropylene = 02-5160-20-404
*Air Valve Assembly includes items 2–7.
**Refer to corresponding elastomer chart in Section 10 for correct part number.
0400 Specialty Code = T2R Champ
0402 Specialty Code = T2R Champ w/PTFE PFA Coating
All boldface items are primary wear parts.

WILDEN PUMP & ENGINEERING, LLC 18 WIL-10210-E-02 7/06
T2R PLASTIC PTFE-Fitted EXPLODED VIEW
Section 9B
EXPLODED VIEW/PARTS LISTING
1