Dover WILDEN A1 Series Instruction Manual

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WIL-10040-E

WILDEN PUMP & ENGINEERING, LLC B WIL-10040-E-02
WILDEN PUMP & ENGINEERING, LLC
TABLE OF CONTENTS
PAGE #
SECTION #1 — WILDEN PUMP DESIGNATION SYSTEM ............... 1
SECTION #2 — THE WILDEN PUMP – HOW IT WORKS ................... 2
SECTION #3 — CAUTIONS — READ FIRST! ............................................... 3
SECTION #4 — DIMENSIONAL DRAWINGS
A. Model A1T PLASTIC (T-series Center Section) .................................................................. 4
B. Model A1B PLASTIC (Adapter Block with T-series Center Section).................................. 4
C. Model A1P PLASTIC (P-series Center Section) ................................................................. 5
D. Model A1B PLASTIC (Adapter Block with P-series Center Section) ................................. 5
SECTION #5 — PERFORMANCE CURVES
A. Model A1T PLASTIC Rubber Fitted (T-series Center Section)........................................... 6
B. Model A1T PLASTIC PTFE Fitted (T-series Center Section) .............................................. 6
C. Model A1P PLASTIC Rubber Fitted (P-series Center Section).......................................... 7
D. Model A1P PLASTIC PTFE Fitted (P-series Center Section) ............................................. 7
SECTION #6 — 70/30 OPERATING CONDITION
A. Model A1T PLASTIC Rubber Fitted (T-series Center Section)........................................... 8
A. Model A1T PLASTIC PTFE Fitted (T-series Center Section) .............................................. 8
B. Model A1P PLASTIC Rubber Fitted (P-series Center Section).......................................... 8
B. Model A1P PLASTIC PTFE Fitted (P-series Center Section) ............................................. 8
SECTION #7 — INSTALLATION & OPERATION
A. Installation Accu-Flo........................................................................................................... 9
B. Operating Principals ........................................................................................................... 10
C. Operation & Maintenance................................................................................................... 10
D. Troubleshooting .................................................................................................................. 11
SECTION #8 — DIRECTIONS FOR DISASSEMBLY/REASSEMBLY
A. Models A1T & A1P & A1B Plastic - Wetted Path ............................................................... 12
B. Reassembly Hints & Tips.................................................................................................... 15
C. Gasket Kit Installation......................................................................................................... 16
SECTION #9 — EXPLODED VIEW/PARTS LISTING
A. Model A1T PLASTIC (T-series Center Section) .................................................................. 18
B. Model A1P PLASTIC (P-series Center Section) ................................................................. 20
SECTION #10 — ELASTOMER OPTIONS/
ELECTRICAL INFORMATION
A. Elastomer Options .............................................................................................................. 22
B. Electrical Information.......................................................................................................... 23
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U.S. Clean Air Act
Amendments of 1990

WIL-10040-E-02 1 WILDEN PUMP & ENGINEERING, LLC
1WILDEN PUMP & ENGINEERING
,
LLC
MODEL A1 PLASTIC
MATERIAL CODES
SECTION 1
WILDEN PUMP DESIGNATION SYSTEM
WETTED PARTS
K = PVDF
P = POLYPROPYLENE
AIR SYSTEM BASE TYPE
T = TURBO-FLO™
P = PRO-FLO™
B = ADAPTER BLOCK
DIAPHRAGMS
BN = BUNA-N (Red Dot)
FG = SANIFLEX™ (Cream)
PU = POLYURETHANE (Clear)
TF = TEFLON®PTFE (White)
VT = VITON®(Silver or White Dot)
WF = WIL-FLEX™ (Orange)
VALVE BALL
BN = BUNA-N (Red Dot)
FG = SANIFLEX™
PU = POLYURETHANE (Brown)
TF = TEFLON®PTFE (White)
VT = VITON®(Silver or White Dot)
WF = WIL-FLEX™ (Orange)
VALVE SEAT O-RING
BN = BUNA-N (Red Dot)
FG = SANIFLEX™ (Cream)
PU = POLYURETHANE (Brown)
TV = TEFLON®ENCAP. VITON®
WF = WIL-FLEX™ (Orange)
VALVE SEAT
K = PVDF
VT = VITON®
CENTER SECTION
PP = POLYPROPYLENE
AIR VALVE
A = ALUMINUM (available for A1T
only)
P = POLYPROPYLENE
U = UHMW (available for
A1B only)
L = ACETAL (Available for A1B and
A1P only)
NOTE: MOST ELASTOMERIC MATERIALS USE COLORED DOTS FOR IDENTIFICATION.
Buna-N and Viton are registered trademarks of DuPont Dow Elastomers.
Teflon is a registered trademark of DuPont.

WILDEN PUMP & ENGINEERING, LLC 2 WIL-10040-E-02
SECTION 2
THE WILDEN PUMP — HOW IT WORKS
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 When the solenoid is ener-
gized, the air valve directs pressure 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
membrane between the compressed air
and the liquid, balancing the load and
removing mechanical stress from the
diaphragm. The compressed air moves
the diaphragm away from the center
section of the pump. The opposite
diaphragm is pulled in by the shaft
connected to the pressurized
diaphragm. Diaphragm B is on its
suction stroke; air behind the diaphragm
has been forced out to the atmosphere
through the exhaust port. The move-
ment of diaphragm B toward the center
section of the pump creates a vacuum
within chamber B. Atmospheric pres-
sure forces fluid into the inlet manifold
forcing the inlet valve ball off of its seat.
Liquid is free to move past the inlet valve
ball and fill the liquid chamber (see
shaded area).
FIGURE 2 When the solenoid valve is
deenergized, the air valve redirects pres-
surized air to the back side of diaphragm
B. The pressurized air forces diaphragm
B away from the center section while
pulling diaphragm A to the center
section. 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 of 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 section of the pump creates a
vacuum within liquid chamber A. Atmos-
pheric pressure forces fluid into the inlet
manifold of the pump. The inlet valve
ball is forced off of its seat allowing the
fluid being pumped to fill the liquid
chamber.
FIGURE 3 Once the solenoid valve is
reenergized, the air is redirected 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 intake 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.
RIGHT STROKE LEFT STROKE RIGHT STROKE

WIL-10040-E-02 3 WILDEN PUMP & ENGINEERING, LLC
SECTION 3
WILDEN MODEL A1 PLASTIC
CAUTIONS – READ FIRST!
TEMPERATURE LIMITS:
Polypropylene 0°C to 79°C 32°F to 175°F
PVDF –12°C to 107°C 10°F to 225°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
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
Teflon®PTFE 4.4°C to 104.4°C 40°F to 220°F
CAUTION: When choosing pump materials, be sure to
check the temperature limits for all wetted components.
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 signifi-
cantly reduce maximum safe operating temperatures.
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 discharge 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 plas-
tic 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 other fasteners prior to
installation. Fittings may loosen during transportation.
NOTE: When installing Teflon®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 reassembly.
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: Only explosion proof (NEMA 7) solenoid
valves should be used in areas where explosion proof
equipment is required.
CAUTION: Do not lubricate lube-free pumps.
NOTE: A1 Plastic Teflon®-fitted pumps come standard
from the factory with expanded Teflon®gaskets. (See
Gasket Kit Installation in Section 8C.)
CAUTION: Do not over-tighten the air inlet reducer
bushing. Too much torque on the reducer bushing may
cause damage. Do not exceed .9 N-m (8 in.-lbs.).
CAUTION: The A1 pump is not submersible.

WILDEN PUMP & ENGINEERING, LLC 4 WIL-10040-E-02
SECTION 4A
DIMENSIONAL DRAWING
DIMENSIONS – A1T - ACCU-FLO™ (PLASTIC)
ITEM METRIC (mm) STANDARD (inch)
A 30 1.16
B 114 4.50
C 196 7.69
D 208 8.19
E 218 8.63
F 118 7.00
G 145 5.66
H 114 4.50
J 84 3.25
K 102 4.00
L 28 1.09
N 84 3.31
P 8 .28
R 213 8.38
S 160 6.31
T 81 3.22
U 46 1.75
SECTION 4B
DIMENSIONAL DRAWING
12.7 mm (.50”)
BSP (FNPT) LIQUID INLET
12.7 mm (.50”)
BSP (FNPT) LIQUID DISCHARGE
12.7 mm (.50”)
BSP (FNPT) LIQUID INLET
6.35 mm
(.25”) BSP
(FNPT)
AIR INLET
12.7 mm (.50”)
BSP (FNPT) LIQUID DISCHARGE
6.35 mm
(.25”)
BSP (FNPT)
AIR INLET
A
B
A
H
J
K L
B
C
D
E
F
G
C
D
E
R
S
K
P
J
G
H
L
M
F
T
U
DIMENSIONS – A1B ACCU-FLO™ (PLASTIC)
ITEM METRIC (mm) STANDARD (inch)
A 30 1.16
B 104 4.06
C 124 4.94
D 196 7.69
E 208 8.19
F 218 8.63
G 118 7.00
H 145 5.66
J 114 4.50
K 84 3.25
L 102 4.00
M 28 1.09
P 8 .28

WIL-10040-E-02 5 WILDEN PUMP & ENGINEERING, LLC
SECTION 4C
DIMENSIONAL DRAWING
SECTION 4D
DIMENSIONAL DRAWING
DIMENSIONS – A1P ACCU-FLO (PLASTIC)
ITEM METRIC (mm) STANDARD (inch)
A 30 1.16
B 117 4.59
C 196 7.69
D 244 9.56
E 208 8.19
F 218 8.63
G 51 2.00
H 89 3.50
J 191 7.50
K 117 4.56
L 142 5.56
M 56 2.16
N 231 9.06
P 145 5.66
R 114 4.50
S 84 3.25
T 102 4.00
V 28 1.09
W 8 .28
DIMENSIONS – A1B ACCU-FLO (PLASTIC)
ITEM METRIC (mm) STANDARD (inch)
A 30 1.16
B 117 4.59
C 140 5.50
D 196 7.69
E 208 8.19
F 218 8.63
G 64 2.53
H 118 6.88
J 145 5.66
K 114 4.50
L 884 3.25
M 102 4.00
N 8 .28
R 28 1.09
12.7 mm (.50”)
BSP (FNPT) LIQUID DISCHARGE
12.7 mm (.50”)
BSP (FNPT) LIQUID DISCHARGE
12.7 mm (.50”)
BSP (FNPT) LIQUID INLET
12.7 mm (.50”)
BSP (FNPT) LIQUID INLET
6.35 mm
(.25”)
BSP (FNPT)
AIR INLET
12.7 mm (.50”)
BSP (FNPT) AIR
EXHAUST
A
B
C
D
E
F
G
H
M
J
K
R
N
L
B
A
C
D
E
F
G
H
J
K
M L
N
P
R
S T
W
V
6.35 mm
(.25”)
BSP (FNPT)
AIR INLET

WILDEN PUMP & ENGINEERING, LLC 6 WIL-10040-E-02
SECTION 5A
PERFORMANCE CURVES
Height ..................................218 mm (8.63")
Width ...................................208 mm (8.19")
Depth...................................118 mm (7.00")
Ship Weight ..............Polypropylene 4.1 kg (9 lbs.)
PVDF 5.1 kg (11 lbs.)
Air Inlet .................................6.35 mm (1/4")
Inlet ......................................12.7 mm (1/2")
Outlet....................................12.7 mm (1/2")
Suction Lift..........................4.49 m Dry (15')
9.33 m Wet (31')
Displacement per
Stroke ............................ .06 l (.015 gal.)1
Max. Flow Rate ...............33.4 lpm (9.1 gpm)
Max. Size Solids..................1.59 mm (1/16")
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 18.9 lpm (5 gpm) against
a discharge head pressure of 2.2 Bar (32
psig) requires 4.1 Bar (60 psig) and 16.2
Nm3/h (9.5 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.
KEY
.4+ .3 .25
.2 .15 .13
SECTION 5B
PERFORMANCE CURVES
Height ..................................218 mm (8.63")
Width ...................................208 mm (8.19")
Depth...................................118 mm (7.00")
Ship Weight ..............Polypropylene 4.1 kg (9 lbs.)
PVDF 5.1 kg (11 lbs.)
Air Inlet .................................6.35 mm (1/4")
Inlet ......................................12.7 mm (1/2")
Outlet....................................12.7 mm (1/2")
Suction Lift..........................3.46 m Dry (11')
9.33 m Wet (31')
Displacement per
Stroke ............................ .06 l (.014 gal.)1
Max. Flow Rate ...............29.1 lpm (7.7 gpm)
Max. Size Solids..................1.59 mm (1/16")
1Displacement per stroke was calculated at 4.8 Bar
(70 psig) air inlet pressure against a2 Bar (30 psig)
head pressure.
Example: To pump 18.9 lpm (5 gpm) against
a discharge head pressure of 1.7 Bar (25
psig) requires 4.1 Bar (60 psig) and 17 Nm3/h
(10 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.

WIL-10040-E-02 7 WILDEN PUMP & ENGINEERING, LLC
SECTION 5C
PERFORMANCE CURVES
Height ..................................244 mm (9.56")
Width ...................................208 mm (8.19")
Depth...................................231 mm (9.06")
Ship Weight ..............Polypropylene 4.1 kg (9 lbs.)
PVDF 5.1 kg (11 lbs.)
Air Inlet .................................6.35 mm (1/4")
Inlet ......................................12.7 mm (1/2")
Outlet.....................................12.7mm (1/2")
Suction Lift..........................6.05 m Dry (20')
8.99 m Wet (29')
Displacement per
Stroke ............................ .12 l (.032 gal.)1
Max. Flow Rate .............39.0 lpm (10.3 gpm)
Max. Size Solids..................1.59 mm (1/16")
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 18.9 lpm (5 gpm) against
a discharge head pressure of 2.7 Bar (39
psig) requires 4.1 Bar (60 psig) and 11.1
Nm3/h (6.5 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 5D
PERFORMANCE CURVES
Height ..................................244 mm (9.56")
Width ...................................208 mm (8.19")
Depth...................................231 mm (9.06")
Ship Weight ..............Polypropylene 4.1 kg (9 lbs.)
PVDF 5.1 kg (11 lbs.)
Air Inlet .................................6.35 mm (1/4")
Inlet........................................12.7 cm (1/2")
Outlet .....................................12.7 cm (1/2")
Suction Lift..........................5.18 m Dry (17')
8.99 m Wet (29')
Displacement per
Stroke ........................... ..11 l (.028 gal.)1
Max. Flow Rate .............39.0 lpm (10.3 gpm)
Max. Size Solids..................1.59 mm (1/16")
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 18.9 lpm (5 gpm) against
a discharge head pressure of 2.3 Bar (34
psig) requires 4 Bar (60 psig) and 11.1 Nm3/h
(6.5 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.

WILDEN PUMP & ENGINEERING, LLC 8 WIL-10040-E-02
SECTION 6A
70/30 OPERATING CONDITION
These curves
demonstrate the
flow created when
the stroke rate is
modified under
static air and fluid
pressure condition.
This curve can be
applied to different
pressure conditions
to estimate the
change in flow due
to stroke rate.
These curves
demonstrate the
flow created when
the stroke rate is
modified under
static air and fluid
pressure condition.
This curve can be
applied to different
pressure conditions
to estimate the
change in flow due
to stroke rate.
SECTION 6B
70/30 OPERATING CONDITION