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