Wilden P2 series User manual

Where Innovation Flows
www.wildenpump.com
P2
Original™Series
Metal Pump
EOM
Engineering
Operation &
Maintenance
W I L-1 018 1 - E - 0 5
REPLACES W I L-10 18 1- E - 0 4
WIL-10181-E

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
A. P2 Performance Curves
Rubber-Fitted ........................................................5
TPE-Fitted ...........................................................5
Reduced-Stroke PTFE-Fitted ............................................6
Full-Stroke PTFE-Fitted ................................................6
B. Suction-Lift Curves .....................................................7
SECTION 6 SUGGESTED INSTALLATION, OPERATION & TROUBLESHOOTING........8
SECTION 7 ASSEMBLY / DISASSEMBLY ...........................................11
Air Valve/Center Section Assembly ..........................................13
Reassembly Hints &Tips ..................................................15
SECTION 8 EXPLODED VIEW & PARTS LISTING
P2 Metal. ...............................................................16
P2 Metal Saniflo™ 1935/2004/EC............................................18
SECTION 9 ELASTOMER OPTIONS.................................................20
C
l
a
s
s
I
&
I
I
O
z
o
n
e
D
e
p
l
e
t
i
n
g
S
u
b
s
t
a
n
c
e
s
NON
USE
U.S. Clean Air Act
Amendments of 1990

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:
Polypropylene 0°C to 79°C 32°F to 175°F
PVDF –12°C to 107°C 10°F to 225°F
PFA 7°C to 107°C 20°F to 225°F
Neoprene –18°C to 93°C 0°F to 200°F
Buna-N –12°C to 82°C 10°F to 180°F
EPDM –51°C to 138°C –60°F to 280°F
Viton®FKM –40°C to 177°C –40°F to 350°F
Wil-Flex™ –40°C to 107°C –40°F to 225°F
Saniflex™ –29°C to 104°C –20°F to 220°F
Polyurethane –12°C to 66°C 10°F to 150°F
Polytetrafluoroethylene (PTFE)
14°C to 104°C 40°F to 220°F
Nylon –18°C to 93°C 0°F to 200°F
Acetal –29°C to 82°C –20°F to 180°F
SIPD PTFE with Neoprene-backed 4°C to 104°C 40°F to 220°F
SIPD PTFE with EPDM-backed –10°C to 137°C 14°F to 280°F
Polyethylene 0°C to 70°C 32°F to 158°F
Geolast®–40°C to 82°C –40°F to 180°F
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 178°C (350°F), but polypropylene
has a maximum limit of only 79°C (175°F).
CAUTION: Maximum temperature limits are based upon
mechanical stress only. Certain chemicals will significantly
reduce maximum safe operating temperatures. Consult
Chemical Resistance Guide (E4) for chemical compatibility and
temperature limits.
WARNING: Prevention of static sparking — If static sparking
occurs, fire or explosion could result. Pump, valves, and
containers must be grounded to a proper grounding point when
handling flammable fluids and whenever discharge of static
electricity is a hazard.
CAUTION: Do not exceed 8.6 bar (125 psig) air supply pressure.
CAUTION: The process fluid and cleaning fluids must be
chemically compatible with all wetted pump components.
Consult Chemical Resistance Guide (E4).
CAUTION: Pumps should be thoroughly flushed before
installing into process lines. FDA- and USDA approved pumps
should be cleaned and/or sanitized before being used.
CAUTION: Always wear safety glasses when operating
pump. If diaphragm rupture occurs, material being pumped may
be forced out air exhaust.
CAUTION: Before any maintenance or repair is attempted,
the compressed air line to the pump should be disconnected
and all air pressure allowed to bleed from pump. Disconnect
all intake, discharge and air lines. Drain the pump by turning
it upside down and allowing any fluid to flow into a suitable
container.
CAUTION: Blow out air line for 10 to 20 seconds before
attaching to pump to make sure all pipeline debris is clear. Use
an in-line air filter. A 5μ (micron) air filter is recommended.
NOTE: When installing PTFE diaphragms, it is important
to tighten outer pistons simultaneously (turning in opposite
directions) to ensure tight fit. (See torque specifications in
Section 7.)
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: Tighten all hardware prior to installation.
1
4°C to 149°C (40°F to 300°F) - 13 mm (1/2") and 25 mm (1") models only.
WIL-10181-E-05 1 WILDEN PUMP & ENGINEERING, LLC

Section 2
WILDEN PUMP DESIGNATION SYSTEM
P2 METAL
25 mm (1") Pump
Maximum Flow Rate:
172 lpm (45.5 gpm)
MATERIAL CODES
MODEL
P2 = 25 mm (1")
WETTED PARTS & OUTER PISTON
AA = ALUMINUM / ALUMINUM
AZ = ALUMINUM / NO PISTON
SS = STAINLESS STEEL /
STAINLESS STEEL
SZ = STAINLESS STEEL / NO
PISTON
CENTER SECTION
PP = POLYPROPYLENE
LL = ACETAL
AIR VALVE
P = POLYPROPYLENE
L = ACETAL
DIAPHRAGMS
BNS = BUNA-N (Red Dot)
EPS = EPDM (blue dot)
FBS = SANITARY BUNA1,3
(Two Yellow Dots)
FES = SANITARY EPDM 1,3
(Two Blue Dots)
FSS SANIFLEX™ (Cream)
FWL = SANITARY WIL-FLEX™
IPD1,3
FWS = SANITARY WIL-FLEX™ 1,3
LEL = PTFE – EPDM LAMINATE
IPD1,2,3
NES = NEOPRENE (Green Dot)
PUS = POLYURETHANE (Clear)
TEU = PTFE w/EPDM
BACK-UP (White)1,2,3
TNU = PTFE w/NEOPRENE
BACK-UP (White)
TSS = FULL-STROKE PTFE
w/SANIFLEXTM
BACK-UP
1,2,3
TSU = PTFE W/SANIFLEX™
BACK-UP (White)1,2,3
TWS = FULL-STROKE PTFE
w/WIL-FLEXTM BACK-UP1,2,3
VTS = VITON®(Silver or White
Dot)
WFS = WIL-FLEX™ (Orange Dot)
VALVE BALLS
BN= BUNA-N (Red Dot)
EP = EPDM (Blue Dot)
FS = SANIFLEX™ (Cream)1,3
NE = NEOPRENE (Green Dot)
PU = POLYURETHANE (Clear)
TF = PTFE1,2,3
VT = VITON®(Silver or White Dot)
WF= WIL-FLEX™ (Orange Dot)
VALVE SEATS
A = ALUMINUM
S = STAINLESS STEEL
VALVE SEAT O-RING
BN= BUNA-N (Red Dot)
EP = EPDM
FS = SANIFLEX™ [HYLREL®
(Cream)1,3
NE = NEOPRENE
PU = POLYURETHANE (Clear)
TF = PTFE (White)1,2,3
WF= WIL-FLEX™ 1
SPECIALTY CODES
2000 NPT threaded
2014 BSPT threaded
2023 Wing Nuts
2070 Saniflo™ FDA
2079 Tri-clamp fittings, wing nuts
2080 Tri-clamp fittings only
2100 Wil-Gard 110V
2102 Wil-Gard sensor wires ONLY
2103 Wil-Gard 220V
2480 Pump Cycle Monitor (sensor & wires)
2483 Pump Cycle Monitor (module, sensor & wires)
2070E Saniflo™ FDA (1935/2004/EC)
LEGEND
PX /XXXXX/ XXX /XX / X XX /2XXX
SEAT
O-RINGS
MODEL VALVE SEATS
VALVE BALLS
DIAPHRAGMS
AIR VALVE
CENTER SECTION
WETTED PARTS & OUTER PISTON
SPECIALTY
CODE
(if applicable)
NOTE: Most elastomers use colored dots for identification. Not all models are available with all material options.
NOTE:
1 Meets Requirements of FDA CFR21.177
2 Meets Requirements of USP Class VI
3 Meets Requirements of 1935/2004/EC
WILDEN PUMP & ENGINEERING, LLC 2 WIL-10181-E-05

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 pressurized air
to the back side of diaphragm A. The compressed
air is applied directly to the liquid column sepa-
rated 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 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 pull-
ing 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 mani-
fold 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.
OPEN
B A B A B A
The Wilden diaphragm pump is an air-operated, positive displacement, self-priming pump. These drawings show flow pattern
through the pump upon its initial stroke. It is assumed the pump has no fluid in it prior to its initial stroke.
FIGURE 1 The air valve directs pressurized
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 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,reachesthelimitofitsdischarge
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 fluid to flow through the pump
discharge. The movement of diaphragm A
toward the center 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 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.
The Pro-Flo®patented air distribution system incorporates two
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.
Section 3
HOW IT WORKS—PUMP
//
TT4845 EOM P4/PV4M 5/05 3WILDEN PUMP & ENGINEERING, LLC
HOW IT WORKS—AIR DISTRIBUTION SYSTEM
Section 3
HOW IT WORKS
HOW IT WORKS—AIR DISTRIBUTION SYSTEM
WIL-10181-E-05 3 WILDEN PUMP & ENGINEERING, LLC