Dover PSG Wilden GPS420 Instruction Manual

EOM
ENGINEERING OPERATION
& MAINTENANCE
GPS CSA-Certified
Bolted Metal Pumps
Natural Gas-Operated
GPS420/430, GPS820/830, and GPS1520/1530
WIL-17100-E-02
Where InnovationFlows

WIL-17100-E-02 Wilden®
2
Contents
Section 1: Precautions - Read First! 4
Section 2: Wilden Pump Designation System 5
Section 3: How It Works 6
Section 4: Dimensional Drawings 7
Section 5: CSA Performance 12
GPS420/G P S4 30 Metal EZ- Ins t al l TPE - F itted 12
GPS420/G P S4 30 Metal Fu ll- Stroke PTFE-F itted 12
GPS820/G P S830 Metal EZ-Install T PE-F it ted 13
GPS820/G P S830 Metal Fu ll-Str ok e PTFE-F itted 13
GPS1520/ G P S153 0 M etal EZ-I ns tall T P E-Fit t ed 14
GPS1520/ G P S153 0 M etal F ull -Stroke P TFE- Fitted 14
Suction- Li ft Capability 15
Section 6: CSA-Certified Pump Suggested Installation 17
Section 7: Disassembly / Reassembly 20
Pump Disassemb ly 20
Groundi ng Stra p f or C S A Pumps 23
Air Valve Disassembl y 24
Shaft Sea l I nstalla tio n 29
Section 8: Exploded View and Parts List 30
GPS420/430 M etal 30
GPS820/830 Alum inum 32
GPS820/830 St ai nless Steel 34
GPS1520 Alum inu m 36
GPS1520/1530 Stainless Steel 38

WIL-17100-E-02 Wilden®
3
Copyright
Copyright 2018 PSG®, a Dover Company. All rights reserved.
PSG reserves the right to modify the information and illustrations in this document without prior notice. The
product described in this document is furnished under a license agreement or nondisclosure agreement. No
part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or any
means electronic or mechanical, including photocopying and recording, without the written permission of PSG,
a Dover Company, except as described by the terms of those agreements.
This is a non-contractual document. 01-2019.
Trademarks
PSG and the PSG logo are registered trademarks of PSG. Wilden® is a registered trademark of PSG
California LLC. Pro-Flo® SHIFT and Pro-Flo® are registered trademarks of PSG California LLC. Wil-Flex® is a
trademark of PSG California LLC. Saniflex™ is a trademark of PSG California LLC.
All trademarks, names, logos and service marks (collectively "trademarks") in this document are registered
and unregistered trademarks of their respective owners. Nothing contained in this document should be
construed as granting any license or right to use any trademark without the prior written permission of the
trademark owner.
Warranty
Each and every product manufactured by Wilden is built to meet the highest standards of quality. Every pump
is functionally tested to insure integrity of operation. Wilden warrants that pumps, accessories and parts
manufactured or supplied by it to be free from defects in material and workmanship for a period of five (5)
years from date of installation or six (6) years from date of manufacture, whichever comes first.
For more information, and to register your Wilden pump for warranty, please visit
https://www.psgdover.com/wilden/support/warranty-registration.
Certifications

WIL-17100-E-02 Wilden®
4
Precautions - Read First!
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
Wil-Flex™
Polytetrafluoroethylene
(PTFE)1
–40°C to 107°C
4°C to 104°C
–40°C to 225°C
40°F to 220°F
14°C to 149°C (40°F to 300°F) - 13 mm (1/2") and 25 mm (1") models only.
NOTE: Not all materials are available for all models. See "Wilden Pump
Designation System " on page 5 for material options for your pump.
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 6.9 bar (100 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.
Section 1

WIL-17100-E-02 Wilden®
5
LEGEND
MATERIAL CODES
MODEL
GPS420 = ATEX, CSA,
PRO-FLO SHIFT,
(THREADED)
GPS430 = ATEX, CSA,
PRO-FLO SHIFT
(FLANAGED)
GPS820 = ATEX, CSA,
PRO-FLO SHIFT
(THREADED)
GPS830 = ATEX, CSA,
PRO-FLO SHIFT,
(FLANAGED)
GPS1520 = ATEX, CSA,
PRO-FLO SHIFT
(THREADED)
GPS1530 = ATEX, CSA,
PRO-FLO SHIFT
(FLANAGED)
WETTED PATH
A = ALUMINUM
S = STAINLESS STEEL
OUTER PISTON
A = ALUMINUM
S = STAINLESS STEEL
CENTER BLOCK
AA = ALUMINUM
SS = STAINLESS STEEL
AIR VALVE
A = ALUMINUM
SS = STAINLESS STEEL
DIAPHRAGMS
TWS = FULL-STROKE PTFE W/ WIL-
FLEX BACK-UP
ZWS = WIL-FLEX, EZ-INSTALL
(Orange Dot)
VALVE BALLS
TF = PTFE (White)
WF = WIL-FLEX [Santoprene (Orange Dot)]
VALVE SEATS
A = ALUMINUM
S = STAINLESS STEEL
WF = WIL-FLEX [Santoprene (Orange Dot)]
VALVE SEATS O-RINGS
TF = PTFE (White)
SPECIALTY CODES
0014
BSPT (side-ported inlet and discharge on 1” models)
0504
DIN Flange
NOTE: Most elastomeric materials use colored dots for identification.
NOTE: Not all models are available with all material options.
CSA-CERTIFIED
METAL PUMPS
Maximum Flow Rates:
38 mm (1-1/2 " )
460 lpm (122 gpm)
51 mm (2 " )
645 lpm (171 gpm)
76 mm (3 " )
933 lpm (246 gpm)
GPXXXX
/
X
X
X
X
X
/
XXX
/
XX
/
X
XX
/
XXXX
MODEL
O-RINGS
VALVE SEAT
SPECIALTY CODE
VALVE BALLS
(if applicable)
DIAPHRAGMS
AIR VALVE
CENTER BLOCK
OUTER PISTON
WETTED PATHS
Section 2
WILDEN PUMP DESIGNATION SYSTEM

WIL-17100-E-02 Wilden®
6
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.
CLOSED
OUTLET
OPEN
OPEN
OUTLET
CLOSED
CLOSED
OUTLET
OPEN
B
A
B
A
B
A
CLOSED
CLOSED
FIGURE 1 Theairvalvedirectspressurized
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 dia-
phragm, 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. 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 thestroke, 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 theapplication.
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 theend of thestroke, the innerpiston 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.
Section 3
HOW IT WORKS —PUMP

WIL-17100-E-02 Wilden®
7
GPS420 Metal
GPS430 Aluminum
DIMENSIONS
ITEM
METRIC (mm)
STANDARD (inch)
A
442
17.4
B
64
2.5
C
261
10.3
D
266
10.5
E
391
15.4
F
445
17.5
G
51
2
H
249
9.8
J
49
1.9
K
132
5.2
L
333
13.1
M
321
12.6
N
531
20.9
P
518
20.4
R
274
10.8
S
224
8.8
T
152
6
U
178
7
V
11
0.4
LW0231 REV. C
DIMENSIONS
ITEM
METRIC (mm)
STANDARD (inch)
A
442
17.4
B
80
3.1
C
324
12.7
D
330
13
E
531
20.9
F
594
23.4
G
606
23.9
H
122
4.8
J
122
4.8
K
50
2
L
132
5.2
M
334
13.1
N
321
12.7
P
531
20.9
R
519
20.4
S
312
12.3
T
247
9.7
U
206
8.1
V
152
6
W
170
6.7
X
11
0.4
DIN (mm)
ANSI (inch)
X
150 DIA.
5.0 DIA.
Y
109 DIA.
4.3 DIA.
Z
16 DIA.
0.6 DIA.
LW0296 Rev, A
DIMENSIONAL DRAWING
Section 4

WIL-17100-E-02 Wilden®
8
GPS430 Stainless Steel
GPS820 Aluminum
DIMENSIONS
ITEM
METRIC (mm)
STANDARD (inch)
A
443
17.5
B
89
3.5
C
285
11.2
D
291
11.5
E
529
20.8
F
528
20.8
G
273
10.8
H
49
1.9
J
86
3.4
K
84
3.3
L
132
5.2
M
333
13.1
N
321
12.6
P
531
20.9
R
518
20.4
S
274
10.8
T
224
8.8
U
178
7
V
203
8
W
11
0.4
DIN (mm)
ANSI (inch)
X
150 DIA.
5.0 DIA.
Y
109 DIA.
4.3 DIA.
Z
16 DIA.
0.6 DIA.
LW0233 REV. B
DIMENSIONS
ITEM
METRIC (mm)
STANDARD (inch)
A
453
17.9
B
48
1.9
C
358
14.1
D
364
14.3
E
630
24.8
F
670
26.4
G
62
2.4
H
346
13.6
J
48
1.9
K
177
7
L
366
14.4
M
354
13.9
N
687
27.1
P
675
26.6
R
324
12.8
S
257
10.1
T
229
9
U
254
10
V
14
0.6
LW0238 REV. A
DIMENSIONAL DRAWING

WIL-17100-E-02 Wilden®
9
GPS820 Stainless Steel
DIMENSIONS
ITEM
METRIC (mm)
STANDARD (inch)
A
452
17.8
B
64
2.5
C
367
14.3
D
372
14.7
E
620
24.4
F
658
25.9
G
58
2.3
H
354
14
J
48
1.9
K
178
7
L
366
14.4
M
353
13.9
N
687
27
P
674
26.5
R
305
12
S
254
10
T
229
9
U
254
10
V
15
0.6
LW0240 REV. A
DIMENSIONS
ITEM
METRIC (mm)
STANDARD (inch)
A
452
17.8
B
89
3.5
C
400
15.7
D
405
16
E
675
26.6
F
752
29.6
G
758
29.8
H
116
4.6
J
117
4.6
K
387
15.3
L
48
1.9
M
177
7
N
366
14.4
P
354
13.9
R
687
27.1
S
675
26.6
T
324
12.8
U
254
10
V
326
12.8
W
378
14.9
X
16
0.6
DIN (mm)
ANSI (inch)
Y
165 DIA.
6.0 DIA.
Z
125 DIA.
4.8 DIA.
AA
18 DIA.
0.8 DIA.
LW0239 REV. A
DIMENSIONAL DRAWING
GPS830 Aluminum

WIL-17100-E-02 Wilden®
10
GPS830 Stainless Steel
DIMENSIONS
ITEM
METRIC (mm)
STANDARD (inch)
A
452
17.8
B
89
3.5
C
400
15.7
D
405
16
E
675
26.6
F
752
29.6
G
758
29.8
H
116
4.6
J
117
4.6
K
387
15.3
L
48
1.9
M
177
7
N
366
14.4
P
354
13.9
R
687
27.1
S
675
26.6
T
324
12.8
U
254
10
V
326
12.8
W
378
14.9
X
16
0.6
DIN (mm)
ANSI (inch)
Y
165 DIA.
6.0 DIA.
Z
125 DIA.
4.8 DIA.
AA
18 DIA.
0.8 DIA.
LW0241 REV. A
DIMENSIONS
ITEM
METRIC (mm)
STANDARD (inch)
A
635
25
B
61
2.4
C
426
16.8
D
759
29.9
E
818
32.2
F
84
3.3
G
50
2
H
210
8.3
J
189
7.4
K
722
28.4
L
414
16.3
M
358
14.1
N
307
12.1
P
257
10.1
R
282
11.1
S
15
0.6
LW0319 REV. A
DIMENSIONAL DRAWING
GPS1520 Aluminum

WIL-17100-E-02 Wilden®
11
LW0259 REV. B
LW0260 REV. A
GPS1520 Stainless Steel
ITEM
METRIC (mm)
STANDARD (inch)
A
659
26
B
105
4.1
C
477
18.8
D
483
19
E
796
31.3
F
890
35.1
G
891
35.3
H
90
3.6
J
88
3.5
K
465
18.3
L
48
1.9
M
211
8.3
N
189
7.4
P
177
7
R
721
28.4
S
709
27.9
T
356
14
U
305
12
V
256
10.1
W
279
11
X
14
0.6
DIN (mm)
ANSI (inch)
Y
200 DIA.
7.5 DIA.
Z
160 DIA.
6.0 DIA.
AA
18 DIA.
0.8 DIA.
ITEM
METRIC (mm)
STANDARD (inch)
A
635
25
B
61
2.4
C
426
16.8
D
759
29.9
E
818
32.2
F
84
3.3
G
50
2
H
210
8.3
J
189
7.4
K
722
28.4
L
414
16.3
M
358
14.1
N
307
12.1
P
257
10.1
R
282
11.1
S
15
0.6
GPS1530 Stainless Steel
DIMENSIONS
DIMENSIONS

WIL-17100-E-02 Wilden®
12
PERFORMANCE
GPS420/430 METAL
EZ-INSTALL FITTED
Ship Weight…...420 Threaded AL 26 kg (57 lb)
430 Flanged AL 28 kg (62 lb)
420 Threaded SS 50 kg (111 lb)
430 Flanged SS 53 kg (116 lb)
Air Inlet.........................................19 mm (3/4”)
Inlet ...........................................38 mm (1-1/2”)
Outlet ........................................38 mm (1-1/2”)
Suction Lift .............................4.7 m Dry (15.3’)
9.0 m Wet (29.5’)
Disp. per Stroke
1
...................... 0.8 L (0.22 gal)
Max. Flow Rate.................. 441 lpm (117 gpm)
Max. Size Solids..........................6.4 mm (1/4”)
1
Displacement per stroke was calculated at 4.8
bar (70 psig) air inlet pressure against a 2.1 bar
(30 psig) head pressure.
Example: To pump 242 lpm (64 gpm) against a
discharge head of 2.1 bar (30 psig) requires 4.1
bar (60 psig) and 63 Nm
3
/h (37 scfm) air
consumption .
Caution: Do not exceed 6.9 bar (100 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's performance curve.
GPS420/GPS430 METAL
FULL-STROKE PTFE-
FITTED
Ship Weight......420 Threaded AL 26 kg (57 lb)
430 Flanged AL 28 kg (62 lb)
420 Threaded SS 50 kg (111 lb)
430 Flanged SS 53 kg (116 lb)
Air Inlet.........................................19 mm (3/4”)
Inlet ...........................................38 mm (1-1/2”)
Outlet ........................................38 mm (1-1/2”)
Suction Lift .............................4.5 m Dry (14.8’)
8.6 m Wet (28.4’)
Disp. per Stroke
1
......................0.9 L (0.24 gal)
Max. Flow Rate.................. 460 lpm (122 gpm)
Max. Size Solids..........................6.4 mm (1/4”)
1
Displacement per stroke was calculated at 4.8
bar (70 psig) air inlet pressure against a 2.1 bar
(30 psig) head pressure .
Example: To pump 280 lpm (74 gpm) against
a discharge head of 2.1 bar (30 psig) requires
5.5 bar (80 psig) and 88 Nm
3
/h (52 scfm) air
consumption.
Caution: Do not exceed 6.9 bar (100 psig)
air supply pressure.
Section 5
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's performance curve.

WIL-17100-E-02 Wilden®
13
PERFORMANCE
GPS820/GPS830 METAL
EZ-INSTALLED TPE-FITTED
Ship Weight ...820 Threaded AL 47 kg (104 lb)
830 Flanged AL 54 kg (118 lb)
820 Threaded SS 73 kg (161 lb)
830 Flanged SS 81 kg (178 lb)
Air Inlet ..................................... 19 mm(3/4”)
Inlet..............................................51 mm (2”)
Outlet...........................................51 mm (2”)
Suction Lift......................... 5.5 m Dry (18.2’)
9.0 m Wet (29.5’)
Disp. per Stroke1................... 2.1 L (0.55 gal)
Max. Flow Rate.............. 645 lpm (171 gpm)
Max. Size Solids.....................6.4 mm (1/4”)
1Displacement per stroke was calculated at
4.8 bar (70 psig) air inlet pressure against a
2.1 bar (30 psig) head pressure.
Example: To pump 416 lpm (110 gpm)
against a discharge head of 2.1 bar
(30 psig) requires 5.5 bar (80 psig) and 103
Nm
3
/h (60 scfm) air consumption.
Caution: Do not exceed 6.9 bar (100 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's performance curve.
GP820/GPS830 METAL
FULL-STROKE
PTFE-FITTED
Ship Weight....820 Threaded AL 47 kg (104 lb)
830 Flanged AL 54 kg (118 lb)
820 Threaded SS 73 kg (161 lb)
830 Flanged SS 81 kg (178 lb)
Air Inlet........................................ 19 mm (3/4”)
Inlet..................................................51 mm (2”)
Outlet...............................................51 mm (2”)
Suction Lift............................. 6.1 m Dry (20.0’)
9.0 m Wet (29.5’)
Disp. per Stroke
1
…...................2.4 L (0.63 gal)
Max. Flow Rate.................. 636 lpm (168 gpm)
Max. Size Solids..........................6.4 mm (1/4”)
1Displacement per stroke was calculated at
4.8 bar (70 psig) air inlet pressure against a
2.1 bar (30 psig) head pressure.
Example: To pump 379 lpm (100 gpm)
against a discharge head of 2.1 bar
(30 psig) requires 5.5 bar (80 psig) and
112 Nm3/h (66 scfm) air consumption.
Caution: Do not exceed 6.9 bar (100 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's performance curve.

WIL-17100-E-02 Wilden®
14
PERFORMANCE
GPS1520/GPS1530 METAL
EZ-INSTALLED TPE-FITTED
Ship Weight...1520 Threaded AL 69 kg (104 lb)
1520 Flanged AL 54 kg (118 lb)
1530 Threaded SS 73 kg (161 lb)
Air Inlet...................................... 19 mm(3/4”)
Inlet..............................................51 mm (2”)
Outlet...........................................51 mm (2”)
Suction Lift......................... 5.5 m Dry (18.2’)
9.0 m Wet (29.5’)
Disp. per Stroke
1
...................
2.1 L (0.55 gal)
Max. Flow Rate.............. 645 lpm (171 gpm)
Max. Size Solids.....................6.4 mm (1/4”)
1
Displacement per stroke was calculated at
4.8 bar (70 psig) air inlet pressure against a
2.1 bar (30 psig) head pressure.
Example: To pump 659 lpm (174 gpm)
against a discharge head of 1.4 bar
(20 psig) requires 5.5 bar (80 psig) and 143
Nm
3
/h (84 scfm) air consumption.
Caution: Do not exceed 6.9 bar (100 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's performance curve.
GP1520/GPS1530 METAL
FULL-STROKE
PTFE-FITTED
Ship Weight..1520 Threaded AL 47 kg (104 lb)
1520 Flanged AL 54 kg (118 lb)
1530 Threaded SS 73 kg (161 lb)
Air Inlet........................................ 19 mm (3/4”)
Inlet..................................................51 mm (2”)
Outlet...............................................51 mm (2”)
Suction Lift............................. 5.9 m Dry (19.3’)
8.6 m Wet (28.4’)
Disp. per Stroke
1
…...................5.0 L (1.32 gal)
Max. Flow Rate.................. 993 lpm (246 gpm)
Max. Size Solids........................12.7 mm (1/2”)
1
Displacement per stroke was calculated at
4.8 bar (70 psig) air inlet pressure against a
2.1 bar (30 psig) head pressure.
Example: To pump 420 lpm (111 gpm)
against a discharge head of 2.8 bar
(40 psig) requires 4.8 bar (70 psig) and
110 Nm3/h (65 scfm) air consumption.
Caution: Do not exceed 6.9 bar (100 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's performance curve.

WIL-17100-E-02 Wilden®
15
SUCTION LIFT CURVES
GPS420/GPS430 METAL
SUCTION-LIFT
CAPABILITY
Suction-lift curves are calibrated for
pumps operating at 305 m (1,000')
above sea level. This chart is meant
to be a guide only. There are many
variables that 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.
GPS820/GPS830 METAL
SUCTION-LIFT
CAPABILITY
Suction-lift curves are calibrated for
pumps operating at 305 m (1,000')
above sea level. This chart is meant
to be a guide only. There are many
variables that 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.
GPS1520/GPS1530 METAL
SUCTION-LIFT
CAPABILITY
Suction-lift curves are calibrated for
pumps operating at 305 m (1,000')
above sea level. This chart is meant
to be a guide only. There are many
variables that 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.

WIL-17100-E-02 Wilden®
16
Notes

WIL-17100-E-02 Wilden®
17
CSA-Certified Pump Suggested Installation
Prior to pump installation, ensure that the flow and suction lift
requirements are within the pump model’s capabilities. Refer to the
Section 5, Performance of the Engineering, Operation and Maintenance
(EOM) Manual for specific flow and suction-lift capabilities.
Before installation confirm that the pump materials of construction are
compatible with pumping application. Refer to the Wilden Chemical
Resistance Guide for assistance with wetted path and elastomer
options.
• Piping: The pump should be located so that the length and complexity
of the suction and discharge piping is minimized. Unnecessary elbows,
bends and fittings can increase friction losses and should be avoided.
Pipe sizes should be selected to keep friction losses within practical
limits. The suction pipe diameter should be equivalent or larger than the
diameter of the suction inlet on your Wilden pump. The suction hose
must be non- collapsible, reinforced type as these pumps are capable
of pulling a high vacuum. Discharge piping should also be the
equivalent or larger than the diameter of the pump discharge to help
reduce friction losses.
All piping should be supported independently of the pump. In addition,
the piping should be correctly aligned with the inlet and discharge
connection of the pump to avoid placing stress on the pump fittings.
Flexible hose can be installed to aid in absorbing the forces created by
the natural reciprocating action of the pump and will also assist in
minimizing pump vibration.
• Gas Supply: The pump should have a supply line large enough (a
3/4” supply line is recommended for 1-1/2” and larger pumps) to supply
the volume of air necessary to achieve the desired pumping rate. Gas
pressure to the pump should be controlled by a pressure-regulating
valve and should not exceed a maximum of 6.9 bar (100 psig). It is
suggested that a needle valve be placed in the supply line to control the
flow of gas to the pump. For best results, a 5μ (micron) filter should be
installed before the gas inlet of the pump to eliminate the majority of
compressed gas line contaminants.
• Type of Gas: Sweet gas is required for natural gas- powered
pumps. Please consult the factory if considering using sour gas as
levels of hydrogen sulfide (H2S) may cause unacceptable corrosion
and chemical attack.
• Pump Mounting and Installation: For simple installation and
removal of the pump shut-off valves should be installed in the inlet
and discharge plumbing.
If the pump is to be mounted in a fixed location, a mounting pad
placed between the pump and the foundation will assist in
minimizing 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.
• Solids Passage: All Wilden pumps are capable of passing solids.
A strainer should be used at the inlet of the pump to ensure that the
pump’s rated solids capabilities are not exceeded. Refer to the
Section 5 of this EOM manual for specific solids-passage capabilities.
• Flooded Suction: Pumps in service with a positive suction head
are most efficient when the inlet pressure is limited to 0.5–0.7 bar (7–
10 psig). Premature diaphragm failure may occur if positive suction is
0.7 bar (10 psig) or higher.
• Suction Lift: When used in self-priming applications, it is critical
that all fittings and connections are airtight or a reduction or loss
of pump suction capability will result.
• Gas Outlet: All CSA-certified pumps are fitted with the single
point exhaust option so that all exhaust gases are routed through
the muffler plate exhaust port. The gas outlet must be recaptured
or vented to a safe location in accordance with locally, nationally
and/or industry recognized codes.
• Grounding: Pumps and accessories must be electrically grounded
to a proper grounding point to prevent an accumulation of electro-
static charge when used in potentially explosive areas. CSA-certified
pumps come with a grounding strap and are fitted with a grounding
screw for the purpose of electrically grounding the pump. Periodic
inspection of the ground connection should be performed to ensure
the equipment is properly grounded. Refer to the Wilden CE Safety
Supplement and Safety Manual for additional ATEX-certified pump
considerations.
Functional Testing:
1. Tighten all hardware prior to initial start-up. Refer to Section 7,
Reassembly Hints & Tips in the EOM manual for torque
specifications.
2. Prior to pump installation connect compressed gas line [do not
exceed rated pressure of 6.9 bar (100 psig)] to gas inlet of pump
to ensure that pump cycles consistently.
3. Cycle pump for 2-3 minutes.
4. After pump installation, check piping connections for leaks.
Pump Operation:
1. To avoid damage to the pump new installations should be
checked for any debris in tank or piping system.
2. Once installation is complete, pump operation can be started.
Confirm the shut-off valves in the inlet and discharge plumbing
are open. Do not exceed the pump’s maximum rated pressure of
6.9 bar (100 psig). A pressure regulating valve and needle valve
can be used to adjust the speed of the pump.
3. Retighten all exposed fasteners after two (2) hours of operation.
Refer to Section 7, Reassembly Hints & Tips in the EOM manual
for torque specifications.
Section 6

WIL-17100-E-02 Wilden®
18
CSA-Certified Pump Suggested Installation
NOTE: In the event of a power failure, close the shut-off valve
if youdo not want the pump to restart when the power returns.
Air-Operated Pumps: To stop the pump from operating in an
emergency situation, simply closetheshut-offvalve(user-supplied)
installed in the air supply line. A properly functioning valve will stop the air
supplyto the pump, therefore stopping output. This shut-off valve should
be located far enough away from the pumping equipment such that it can
be reached safely in an emergency situation.
Refer to the Wilden CE Safety Supplement, Safety Manual and EOM
Manual for additional information.
Prior to Maintenance: Before any maintenance is performed, confirm
pump is completely de-energized by shutting off the pump and
disconnecting the gas supply line to the pump.
Refer to Section 7, Reassembly Hints & Tips and Section 8, Exploded
View & Parts Listings in the EOM manual for maintenance and spare
parts information.
Operation
CSA -certified pumps are pre-lubricated, and do not require in-line
lubrication. Additional lubrication will not damage the pump, however if
the pump is heavily lubricated by an external source, the pump’s
internal lubrication may be washed away. If the pump is then moved to
a non-lubricated location, it may need to be disassembled and re-
lubricated as described in the DISASSEMBLY/REASSEMBLY.
Pump discharge rate can be controlled by limiting the volume and/or
pressure of the air supply to the pump. An air regulator is used to
regulate 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.
(See Section 5.) 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 pressure, 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. CSA-certified pumps run on pressurized
sweet gas and do not generate heat therefore your process fluid
temperature will not be affected.
Maintenance and Inspections
Since each application 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.
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.

WIL-17100-E-02 Wilden®
19
CSA-Certified Pump Suggested Installation
Troubleshooting
Pump will not run or runs slowly.
1. Ensure that the gas inlet pressure is at least 0.4 bar
(5 psig) above startup pressure and that the differential
pressure (the difference between gas inlet and liquid
discharge pressures) is not less than 0.7 bar (10 psig).
2. Check air inlet filter for debris (see SUGGESTED
INSTALLATION).
3. Check for extreme gas leakage (blow by) that would
indicate worn seals/bores in the gas valve, pilot spool
and main shaft.
4. Disassemble pump and check for obstructions in the gas
passageways or objects that would obstruct the
movement of internal parts.
5. Check for sticking ball check valves. If material being
pumped is not compatible with pump elastomers,
swelling may occur. Replace ball check valves and seals
with proper elastomers. Also, as the check valve balls
wear out, they become smaller and can become stuck in
the seats. In this case, replace balls and seats.
6. Check for broken inner pistons that will cause the gas
valve spool to be unable to shift.
7. Remove plug from pilot spool exhaust.
Pump runs, but little or no product flows.
1. Check for pump cavitation; slow pump speed down
to allow thick material to flow into liquid chambers.
2. Verify that vacuum required to lift liquid is not
greater than the vapor pressure of the material
being pumped (cavitation).
3. Check for sticking ball check valves. If material being
pumped is not compatible with pump elastomers, swelling
may occur. Replace ball check valves and seats with
proper elastomers. Also, as the check valve balls wear out,
they become smaller and can become stuck in the seats. In
this case, replace balls and seats.
Pump gas valve freezes.
1. Check for excessive moisture in compressed gas.
Alternatively, a coalescing filter may be used to
remove the water from the compressed gas in
some applications.
Air bubbles in pump discharge.
1. Check for ruptured diaphragm.
2. Check tightness of outer pistons
(refer to torque specifications).
3. Check tightness of fasteners and integrity of
O-rings and seals, especially at intake manifold.
4. Ensure pipe connections are airtight.
Product comes out air exhaust.
1. Check for diaphragm rupture.
2. Check tightness of outer pistons to shaft.

WIL-17100-E-02 Wilden®
20
Disassembly / Reassembly
Pump Disassembly
Tools Required:
• Appropriate-sized 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.
NOTE: The model photographed is an aluminum 51 mm (2”) advanced FIT
pump. Your specific pump model may vary from configuration shown; however,
pump disassembly procedure will be the same.
Step 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.
Step 2
Lift the discharge manifold to expose the
discharge valve balls and valve seats.
Inspect the ball cage area of the manifold
for excessive wear or damage .
Step 3
Remove the discharge valve balls and valve
seats from the liquid chambers, and inspect for
nicks, gouges, chemical attack or abrasive wear.
Replace worn parts with genuine Wilden parts for
reliable performance
Section 7