Dover PSG Wilden PX220 Instruction Manual

PX220/PX230
Metal Pump
EOM
Engineering
Operation &
Maintenance
wildenpump.com
Where Innovation Flows

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
Operating Principle........................................................8
How to Use this EMS Curve ................................................9
Performance Curves
PX220/PX230 Metal Rubber-Fitted ........................................12
PX220/PX230 MetalTpe-Fitted ...........................................13
PX220/PX230 Metal Reduced-Stroke PTFE-Fitted ............................14
PX220/PX230 Metal Full-Stroke PTFE-Fitted ................................15
Suction-Lift Curves .......................................................16
SECTION 6 SUGGESTED INSTALLATION, OPERATION & TROUBLESHOOTING........17
SECTION 7 DISASSEMBLY / REASSEMBLY .............................................20
Grounding Strap for CSA Pumps ...........................................22
Air Valve Disassembly ....................................................23
Reassembly Hints &Tips ..................................................26
SECTION 8 EXPLODED VIEW & PARTS LISTING
PX220/PX230 Metal.............................................................28
SECTION 9 ELASTOMER OPTIONS ......................................................30
TABLE OF CONTENTS

WIL-11610-E- 02 1 WILDEN PUMP & ENGINEERING, LLC
CAUTION: Do not apply compressed air to the exhaust port
— pump will not function.
CAUTION: Do not, under any circumstance loosen the set
screw located at the adjuster dial of the Pro-Flo X™ pump.
If the set screw is loose when the pump is pressurized, it
could eject and cause injury to anyone in the area.
CAUTION: Do not over-lubricate air supply — excess
lubrication will reduce pump performance. Pump is pre-
lubed.
Temperature Limits:
Acetal –29°C to 82°C –20°F to 180°F
Buna-N –12°C to 82°C 10°F to 180°F
Geolast®–40°C to 82°C –40°F to 180°F
Neoprene –18°C to 93°C 0°F to 200°F
Nordel®EPDM –51°C to 138°C –60°F to 280°F
Nylon –18°C to 93°C 0°F to 200°F
PFA –7°C to 107°C 45°F to 225°F
Polypropylene 0°C to 79°C 32°F to 175°F
Polyurethane –12°C to 66°C 10°F to 150°F
PVDF –12°C to 107°C 10°F to 225°F
Saniflex™ –29°C to 104°C –20°F to 220°F
SIPD PTFE with EPDM-backed 4°C to 137°C 40°F to 280°F
SIPD PTFE with Neoprene-backed 4°C to 93°C 40°F to 200°F
PTFE14°C to 104°C 40°F to 220°F
FKM –40°C to 177°C –40°F to 350°F
Wil-Flex™ –40°C to 107°C –40°F to 225°F
NOTE: Not all materials are available for all models. Refer
to Section 2 for material options for your pump.
CAUTION: Canadian Standards Association (CSA)
configured pumps should not be used in temperatures
lower than 0.0°C to 52°C (32°F to 125°F).
CAUTION: When choosing pump materials, be sure to
check the temperature limits for all wetted components.
Example: FKM has a maximum limit of 177°C (350°F) but
polypropylene has a maximum limit of only 79°C (175°F).
CAUTION: Maximum temperature limits are based upon
mechanical stress only. Certain chemicals will significantly
reduce maximum safe operating temperatures. Consult
Chemical Resistance Guide for chemical compatibility and
temperature limits.
WARNING: Prevent 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: Canadian Standards Association (CSA)
configured pumps must be electrically grounded using the
grounding conductor provided. Improper grounding can
cause improper and dangerous operation.
CAUTION: For U.L. listed pumps, do not exceed 3.4 bar (50
psig) air supply pressure.
CAUTION: Do not exceed 8.6 bar (125 psig) air supply
pressure.
CAUTION: Canadian Standards Association (CSA)
configured pumps should not exceed 6.9 bar (100 psig)
natural gas supply pressure.
CAUTION: The process fluid and cleaning fluids must be
chemically compatible with all wetted pump components.
Consult the Chemical Resistance Guide.
CAUTION: Do not exceed 82°C (180°F) air inlet temperature
for Pro-Flo X™ models.
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: Cast Iron PTFE-fitted pumps come standard from
the factory with expanded PTFE gaskets installed in the
diaphragm bead of the liquid chamber. PTFE gaskets
cannot be re-used.
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: Pro-Flo X™ pumps can be used for submersible
applications, when using the Pro-Flo X™ submersible
option.
CAUTION:Tighten all hardware prior to installation.
CAUTION: The gas outlet of CSA configured pumps must
be vented to a safe location in accordance with local codes
or, in the absence of local codes, an industry or nationally
recognized code having jurisdiction over the specified
installation.
CAUTION: For U.L. listed pumps, all pipe connections are
to be made using U.L. classified gasoline-resistant pipe
compound.
CAUTION: For U.L. listed pumps all installations must
conform to NFPA 30, NFPA 30A and all other applicable
codes.
CAUTION: For U.L. listed pumps, air exhaust port is to
be connected to pipe or tubing to be routed outdoors or
other location determined to be equivalent.
CAUTION: For U.L. listed pumps, pump is to be grounded
usingthejam-nutlocatedatthetopofthelongverticalcarriage
bolt. The ground connection is marked with a tag having the
grounding symbol.
1
4°C to 149°C (40°F to 300°F) - 13 mm (1/2") and 25 mm (1") models only.
Section 1
CAUTIONS—READ FIRST!

WILDEN PUMP & ENGINEERING, LLC 2 WIL-11610-E- 02
NOTE: MOST ELASTOMERIC MATERIALS USE COLORED DOT FOR IDENTIFICATION
PX220/PX230 METAL
25 mm (1") Pump
Maximum Flow Rate:
212 lpm (56 gpm)
Section 2
WILDEN PUMP DESIGNATION SYSTEM
MATERIAL CODES
LEGEND
XPX220 /XXXXX / XXX/XX /XXX/XXXX
O-RINGS
MODEL VALVE SEATS
VALVE BALLS
ATEX DIAPHRAGMS
AIR VALVE
CENTER SECTION
WETTED PARTS & OUTER PISTON
SPECIALTY
CODE
(if applicable)
SPECIALTY CODES
NOTE: The Wilden UL 79 Listed products covered by this manual are PX200 models followed by AA or SS, followed by AA, followed by A, followed by BNS
or TNU, followed by BN or TF, followed by A or S, followed by BN or TF, followed by 0492, 0493 or 0494. Wilden UL Listed pumps have been evaluated for use
at a 25° C (77° F) ambient temperature with a maximum inlet pressure of 3.4 bar (50 psi).
0014 25 mm (1”) BSPT side-ported inlet and discharge
0320 Single-point exhaust
0492 U.L. Approved, Side-ported (1” inlet and discharge manifolds)
0493 U.L. Approved, Center Ported NPT, Turbo
“drop-in” (1” Inlet facing air inlet, 3/4” discharge facing exhaust)
0494 U.L. Approved, Center Ported NPT, Pro-Flo
“drop-in” (1” inlet facing exhaust, 3/4” discharge facing air inlet)
0677 25 mm (1") NPT center-ported inlet and discharge manifold
0678 25 mm (1") BSPT center-ported inlet and discharge manifold
0687 25 mm (1") NPT center-ported inlet and discharge manifold,
Submersible Center Section
0688 25 mm (1") BSPT center-ported inlet and discharge
manifold, Submersible Center Section
0695 19 mm (3/4") NPT center-ported discharge manifold
(Turbo-Flo "Drop-in")
0696 19 mm (3/4") BSPT center-ported discharge manifold
(Turbo-Flo "Drop-in")
0697 19 mm (3/4") NPT center-ported discharge manifold
(Pro-Flo "Drop-in")
0698 19 mm (3/4") BSPT center-ported discharge manifold
(Pro-Flo "Drop-in")
0735 19 mm (3/4") NPT center-ported discharge manifold
(Turbo-Flo "Drop-in"), Submersible Center Section
0736 19 mm (3/4") BSPT center-ported discharge manifold
(Turbo-Flo "Drop-in"), Submersible Center Section
0737 19 mm (3/4") NPT center-ported discharge manifold
(Pro-Flo "Drop-in"), Submersible Center Section
0738 19 mm (3/4") BSPT center-ported discharge manifold
(Pro-Flo "Drop-in"), Submersible Center Section
MODEL
PX220 = PRO-FLO®THREADED
PORTS
PX230 = PRO-FLO®FLANGED
PORTS
XPX220 = PRO-FLO®ATEX
THREADED PORTS
XPX230 = PRO-FLO®ATEX
FLANGED PORTS
WETTED PARTS & OUTER PISTON
AA = ALUMINUM / ALUMINUM
SS = STAINLESS STEEL /
STAINLESS STEEL
WW = DUCTILE IRON /
DUCTILE IRON
CENTER SECTION
AA = ALUMINUM
AIR VALVE
A = ALUMINUM
DIAPHRAGMS
BNS = BUNA-N (Red Dot)
EPS = EPDM (Blue Dot)
ESD = BUNA-N
FSL = FULL-STROKE SANITARY
SANIFLEX™ IPD [Hytrel®
(Cream)]
FSS = SANIFLEXTM
[Hytrel®(Cream)]
FWL = FULL-STROKE SANITARY
WIL-FLEX™ [Santoprene®
(Two Black Dots)]
NES = NEOPRENE (Green Dot)
PUS = POLYURETHANE (Clear)
TEU = PTFE w/EPDM
BACK-UP (White)
TNU = PTFE w/NEOPRENE
BACK-UP (White)
TSS = FULL-STROKE PTFE
w/SANIFLEX™ BACK-UP
TSU = PTFE w/SANIFLEX™
BACK-UP (White)
TWS = FULL-STROKE PTFE
TXU = PTFE w/CONDUCTIVE
BUNA-N BACK-UP
w/WIL-FLEXTM BACK-UP
VTS = FKM (White Dot)
WFS = WIL-FLEXTM [Santoprene®
(Three Black Dots)]
WWL = FULL-STROKE WIL-FLEX™
IPD [Santoprene®(Three
Black Dots)]
XBS = CONDUCTIVE BUNA-N
(Two Red Dots)
VALVE BALLS
BN = BUNA-N (Red Dot)
FS = SANIFLEXTM
[Hytrel®(Cream)]
EP = EPDM (Blue Dot)
NE = NEOPRENE (Green Dot)
PU = POLYURETHANE (Brown)
TF = PTFE (White)
VT = FKM (White Dot)
WF = WIL-FLEXTM [Santoprene®
(Three Black Dots)]
VALVE SEATS
A = ALUMINUM
M = MILD STEEL
S = STAINLESS STEEL
VALVE SEAT & MANIFOLD
O-RINGS
BN = BUNA-N
FS = SANIFLEXTM
[Hytrel®(Cream)]
EP = EPDM
NE = NEOPRENE
PU = POLYURETHANE (Brown)
TF = PTFE (White)
VT = FKM
WF = WIL-FLEXTM (Santoprene®)

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; a balanced
load removes 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, 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 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 suction stroke. As
the pump reaches its original starting
point, each diaphragm has gone through
one suction and one discharge stroke.
This constitutes one complete pumping
cycle. The pump may take several cycles
to completely prime depending on the
conditions of the application.
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.
MUFFLER
MAIN SHAFT
AIR INLET AIR VALVE
PILOT SPOOL
AIR VALVE SPOOL
MUFFLER PLATE
END CAP
Section 3
HOW IT WORKS—PUMP
OUTLET
CLOSED
CLOSEDOPEN
OPEN
INLET
B A
OUTLET
CLOSED
CLOSED OPEN
OPEN INLET
B A
OUTLET CLOSED
CLOSED OPEN
OPEN
INLET
B A
WIL-11610-E- 02 3WILDEN PUMP & ENGINEERING, LLC
HOW IT WORKS—AIR DISTRIBUTION SYSTEM