Dover PSG Wilden GPS220 Instruction Manual

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EOM
Engineering
Operation &
Maintenance
Where Innovation Flows
Natural Gas-Operated
CSA-Certied
13 mm (1/2”) and
25 mm (1”) Metal Pump

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
GPS1 Metal Rubber-Fitted ..................................................6
GPS1 Metal PTFE-Fitted ....................................................6
GPS220/GPS230 Metal Rubber-Fitted .........................................7
GPS220/GPS230 Metal Full-Stroke PTFE-Fitted .................................7
Suction-Lift Curves ........................................................8
SECTION 6 SUGGESTED INSTALLATION, OPERATION & TROUBLESHOOTING........9
SECTION 7 DISASSEMBLY / REASSEMBLY ........................................12
Reassembly Hints &Tips ..................................................19
SECTION 8 EXPLODED VIEW & PARTS LISTING
GPS1 Metal .............................................................20
GPS220/GPS230 Metal ....................................................22
SECTION 9 REPAIR KITS ..........................................................28
TABLE OF CONTENTS

WIL-17011-E-01 1 WILDEN PUMP & ENGINEERING, LLC
CAUTION: Do not apply pressurized gas to the
exhaust port — pump will not function.
TEMPERATURE LIMITS:
Buna-N –12°C to 82°C 10°F to 180°F
Polytetrafluoroethylene (PTFE)
14°C to 104°C 40°F to 220°F
CAUTION: Canadian Standards Association
(CSA) configured pumps should not be used in
temperatures lower than 0°C (32°F) or higher than
52°C (125°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. Pumps must be
electrically grounded using the grounding
conductor provided. Improper grounding can
cause improper and dangerous operation.
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.
CAUTION: Do not exceed 82°C (180°F) air inlet
temperature for all models.
CAUTION: Pumps should be thoroughly flushed
before installing into process lines.
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: Ensure that the gas supply line is clear
of debris. Use an in-line air filter. A 5μ (micron) air
filter is recommended.
NOTE: When installing PTFE diaphragms,
it is important to tighten the outer pistons
simultaneously (turning in opposite directions)
to ensure a tight fit. (See torque specifications)
NOTE: Some 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: All CSA-certified pumps are fitted with
a single-point exhaust to route all exhaust gas
through the muffler exhaust port. The gas outlet
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: 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.
Section 1
CAUTIONS—READ FIRST!

WILDEN PUMP & ENGINEERING, LLC 2 WIL-17011-E-01
SPECIALTY CODES
Section 2
`WILDEN PUMP DESIGNATION SYSTEM
CSA-CERTIFIED
METAL PUMPS
Maximum Flow
Rates:
13 mm (1/2”)
60.2 lpm (15.9 gpm)
25 mm (1”)
204 lpm (54 gpm)
LEGEND
GPXXXX /XXXXX / XXX /XX/ XXX/XXXX
O-RINGS
MODEL VALVE SEAT
VALVE BALLS
DIAPHRAGMS
AIR VALVE
CENTER BLOCK
WETTED PARTS & OUTER PISTON
SPECIALTY
CODE
(if applicable)
MATERIAL CODES
MODEL
GPS1 = ATEX, CSA,
PRO-FLO SHIFT
GPS220 = ATEX, CSA,
PRO-FLO SHIFT
(THREADED)
GPS230 = ATEX, CSA,
PRO-FLO SHIFT
(FLANGED)
WETTED PARTS & OUTER PISTON
AA = ALUMINUM / ALUMINUM
SS = STAINLESS STEEL /
STAINLESS STEEL
CENTER BLOCK
AA = ALUMINUM
AIR VALVE
A = ALUMINUM
DIAPHRAGMS
BNS = BUNA-N (Red Dot)
TXU = PTFE w/CONDUCTIVE
BUNA-N BACKUP
XBS = CONDUCTIVE BUNA-N
(Two Red Dots)
VALVE BALL
BN = BUNA-N (Red Dot)
TF = PTFE (White)
VALVE SEAT
A = ALUMINUM
S = STAINLESS STEEL
VALVE SEAT
& MANIFOLD O-RING
BN = BUNA-N
TF = PTFE (White)
NOTE: Most elastomer materials use colored dots for identification.
NOTE: Not all models are available with all material options.
0014 BSPT (side-ported inlet and discharge on 1” models)
0504 DIN Flange
0677 NPT, center-ported inlet and discharge
0678 BSPT, center-ported inlet and discharge
0695 19 mm (3/4”) NPT, center-ported discharge (inlet facing air inlet, discharge facing air exhaust)
0696 19 mm (3/4”) BSPT, center-ported discharge (inlet facing air inlet, discharge facing air exhaust)
0697 19 mm (3/4”) NPT, center-ported discharge (inlet facing air exhaust, discharge facing air inlet)
0698 19 mm (3/4”) BSPT, center-ported discharge (inlet facing air exhaust, discharge facing air inlet)

WIL-17011-E-01 3 WILDEN PUMP & ENGINEERING, LLC
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 the
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 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.
Section 3
HOW IT WORKS—PUMP
HOW IT WORKS—AIR DISTRIBUTION SYSTEM
The heart of the patented Pro-Flo®SHIFT Air Distribution
System (ADS) is the air valve assembly. The air valve design
incorporates an unbalanced spool with the small end of the
spool being pressurized continuously while the large end of
the spool is alternately pressurized, then exhausted to move
the spool. The air valve spool directs pressurized air to one
chamber while exhausting the other. The air forces the main
shaft/diaphragm assembly to move to one side – discharging
liquid on that side and pulling liquid in on the other side. When
the shaft reaches the end of the stroke, the inner piston actuates
the pilot spool, which controls the air to the large end of the air
valve spool. The repositioning of the air valve spool routes the
air to the other air chamber. The air control spool allows air to
flow freely into the air chamber for the majority of each pump
stroke, but it significantly restricts the flow of air into the air
chamber when activated by the inner piston near the end of the
each stroke.