Dover PSG WILDEN XPR260 Instruction Manual

WIL-11710-E-02
Where InnovationFlows
EOM
ENGINEERING OPERATION
& MAINTENANCE MANUAL
XPR260
Bolted Metal Pump

WIL-11710-E-02 2
XPR260 Bolted Metal
Copyright
Copyright 2022 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.
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 ensure 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-11710-E-02 3
XPR260 Bolted Metal
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: Performance.........................................................................................................8
XPR260 Metal Rubber-Fitted.................................................................................9
XPR260 Metal TPE-Fitted......................................................................................9
XPR260 Metal Full-Stroke PTFE-Fitted................................................................10
XPR260 Metal Reduced-Stroke PTFE-Fitted.......................................................10
Suction Lift Capability ..........................................................................................11
SECTION 6: Suggested Installation, Operation, Maintenance, and Troubleshooting........12
SECTION 7: Disassembly/Reassembly..................................................................................15
Pump Disassembly..............................................................................................15
Air Valve Disassembly.........................................................................................18
Reassembly Hints and Tips .................................................................................21
SECTION 8: Exploded View and Parts List ...........................................................................22
SECTION 9: Elastomer Options .............................................................................................25

WIL-11710-E-02 4
XPR260 Bolted Metal
SECTION 1
WARNING: Always wear safety glasses when operating
a pump to avoid eye injury. If diaphragm rupture occurs,
material being pumped may be forced out of the air
exhaust.
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:
Acetal
-29°C to82°C
-20°F to180°F
Buna-N
-12°C to82°C
10°F to180°F
Geolast®
-40°C to82°C
-40°F to180°F
Neoprene
-18°C to93°C
0°F to 200°F
Nordel EPDM
-51°C to138°C
-60°F to 280°F
Nylon
-18°C to93°C
0°F to 200°F
PFA
-7°C to 107°C
45°F to 225°F
Polypropylene
0°C to79°C
32°F to 175°F
Polyurethane
-12°C to66°C
10°F to150°F
PVDF
-12°C to107°C
10°F to225°F
Saniflex
-29°C to 104°C
-20°F to220°F
SIPD PTFE with EPDM-backed
4°C to137°C
40°F to280°F
SIPD PTFE with Neoprene-backed
4°C to93°C
40°F to200°F
PTFE*
4°C to104°C
40°F to220°F
FKM
-40°C to177°C
-40°F to350°F
Wil-Flex
-40°C to107°C
-40°F to225°F
*4°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”for material options for your pump.
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: Pump surfaces may exceed 80°C (176°F),
contact will result in burns, scalds, and other injuries.
Surface temperature is dependent on the temperature of
the process fluid.
CAUTION: Maximum temperature limits are based on
mechanical stress only. Certain chemicals will reduce
maximum safe operating temperatures significantly.
Consult the Chemical Resistance Guide for chemical
compatibility and temperature limits.
CAUTION: All Wilden pumps are capable of passing
solids. Use a strainer on the pump intake to ensure that
the pump's rated solids capacity is not exceeded.
CAUTION: Do not exceed 8.6 bar (125 psig) air supply
pressure.
CAUTION: Do not exceed 82°C (180°F) air inlet
temperature for all models.
CAUTION: The process fluid and cleaning fluids must be
compatible chemically with all wetted pump components.
CAUTION: Before attempting any maintenance or repair,
disconnect the compressed air line to the pump and allow
all air pressure 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.
CAUTION: Thoroughly flush pumps before installing
them into process lines. Clean and/or sanitize FDA- and
USDA- approved pumps before using them.
CAUTION: Before attaching the air line to the pump, blow
out the air line for 10 to 20 seconds to make sure all
pipeline debris is clear. Use an in-line air filter. A 5µ
(micron) air filter is recommended.
CAUTION: Pro-Flo R pumps can be used in submersible
applications when using the Pro-Flo R submersible
option.
CAUTION: Before installation, tighten all hardware.
NOTE: Materials of construction and elastomer material
may influence suction lift parameters. Please refer to
“Performance”for specifics.
NOTE: When installing PTFE diaphragms, it is important
to tighten outer pistons simultaneously (turning in
opposite directions) to ensure tight fit. (See “Maximum
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: In the event of a power failure, close the shut-off
valve if you do not want the pump to restart when the
power returns.
NOTE: The Safety Supplement document is a part of the
manual. Please refer to the Safety Supplement document
for a complete list of safety considerations including
considerations for safe operation and maintenance of
pumps marked for ATEX environments before starting the
pump.
PRECAUTIONS –READ FIRST!

WIL-11710-E-02 5
XPR260 Bolted Metal
SECTION 2
MATERIAL CODES
MODEL
XPR260 = PRO-FLO®R ATEX
THREADED PORTS
PR260 = PRO-FLO®R
THREADED PORTS
WETTED PATH
A = ALUMINUM
S = STAINLESS STEEL
OUTER PISTON
A = ALUMINUM
S = STAINLESS STEEL
CENTER SECTION
AA = ALUMINUM
AIR VALVE
A = ALUMINUM
DIAPHRAGMS
BNS = BUNA-N (RED DOT)
NES = NEOPRENE (GREEN DOT)
TWS = FULL-STROKE PTFE
W/WIL-FLEX™ BACK-UP
VTS = FKM (WHITE DOT)
WFS= WIL-FLEX™ [SANTOPRENE®
(THREE BLACK DOTS)]
TNU = PTFE w/NEOPRENE
BACKUP
VALVE BALLS
BN = BUNA-N (RED DOT)
NE = NEOPRENE (GREEN DOT)
TF = PTFE (WHITE)
VT = FKM (WHITE DOT)
WF = WIL-FLEX™ [SANTOPRENE®
(THREE BLACK DOTS)]
VALVE SEATS
A = ALUMINUM
S = STAINLESS STEEL
VT = FKM (WHITE DOT)
WF = WIL-FLEX™ [SANTOPRENE®
(THREE BLACK DOTS)]
VALVE SEAT O-RINGS
BN = BUNA-N (RED DOT)
NE = NEOPRENE (GREEN DOT)
TF = PTFE (WHITE)
VT = FKM (WHITE DOT)
WF = WIL-FLEX™ [SANTOPRENE®
(THREE BLACK DOTS)]
SPECIALTY CODES
0014 BSPT
0677 25 mm (1") NPT center-ported inlet and discharge manifold (only for Aluminum)
0678 25 mm (1") BSPT center-ported inlet and discharge manifold (only for Aluminum)
NOTE: Most elastomeric materials use colored dots for identification
NOTE: Not all models are available with all material options
XPR260 METAL
LEGEND
XPR
260
/
X
X
X
X
X
/
X
X
X
/
X
X
/
X
X
X
/
X
X
X
X
25 mm (1") Pump
Maximum Flow Rate:
182 lpm (48 gpm)
O-RINGS
MODEL
VALVE SEATS
SPECIALTY
VALVE BALLS
CODE
DIAPHRAGMS
AIR VALVE
CENTER SECTION
OUTER PISTON
WETTED PATHS
WILDEN PUMP DESIGNATION SYSTEM
(if applicable)

WIL-11710-E-02 6
XPR260 Bolted Metal
SECTION 3
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.
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.
The Pro-Flo®R 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.
HOW IT WORKS –AIR-OPERATED DOUBLE-DIAPHRAGM PUMP
HOW IT WORKS –AIR DISTRIBUTION SYSTEM

WIL-11710-E-02 7
XPR260 Bolted Metal
SECTION 4
XPR260 METAL
DIMENSIONS
ITEM
METRIC
(mm)
STANDARD
(inch)
A
270
10.6
B
36
1.4
C
183
7.2
D
323
12.7
E
347
13.7
F
48
1.9
G
335
13.2
H
71
2.8
J
140
5.5
K
177
7
L
165
6.5
M
132
5.2
N
104
4.1
P
127
5.0
R
10
0.4
TJPR260-01 REV. A
XPR260 METAL –CENTER-PORTED
DIMENSIONS
ITEM
METRIC
(mm)
STANDARD
(inch)
A
331
13.1
B
36
1.4
C
183
7.2
D
324
12.8
E
348
13.7
F
30
1.2
G
335
13.2
H
71
2.8
J
140
5.5
K
178
7.0
L
165
6.5
M
132
5.2
N
104
4.1
P
127
5.0
R
10
0.4
TJPR260-02 REV. A
DIMENSIONAL DRAWING

WIL-11710-E-02 8
XPR260 Bolted Metal
XPR260 STAINLESS STEEL
DIMENSIONS
ITEM
METRIC
(mm)
STANDARD
(inch)
A
246
9.7
B
36
1.4
C
183
7.2
D
323
12.7
E
347
13.7
F
210
8.3
G
123
4.8
H
335
13.2
J
70
2.8
K
140
5.5
L
177
7
M
165
6.5
N
132
5.2
P
105
4.1
R
127
5
S
13
0.5
TJPR260-03 REV. A
DIMENSIONAL DRAWING

WIL-11710-E-02 9
XPR260 Bolted Metal
SECTION 5
XPR260 METAL
RUBBER-FITTED
Ship Weight…………..Aluminum 10 kg (22 lb)
316 Stainless Steel 15 kg (33 lb)
Air Inlet……………………………………….1/2"
Inlet...………………………………...25 mm (1")
Outlet………………………………...25 mm (1")
Suction Lift………..…………..6.9 m Dry (22.7′)
9.0 m Wet (29.5′)
Disp. per Stroke1……………....0.3 L (0.08 gal)
Max. Flow Rate……...……180 lpm (47.5 gpm)
Max. Size Solids…………………3.2 mm (1/8")
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 72.7 lpm (19.2 gpm)
against a discharge pressure head of 3.4 bar
(50 psig) requires 4.1bar (60 psig) and
32.3Nm3/h (19 scfm) air consumption.
(See dot on chart.)
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.
Caution: Do not exceed 8.6 bar (125 psig) air supply pressure.
XPR260 METAL
TPE-FITTED
Ship Weight…………..Aluminum 10 kg (22 lb)
316 Stainless Steel 15 kg (33 lb)
Air Inlet……………………………………….1/2"
Inlet...………………………………...25 mm (1")
Outlet………………………………...25 mm (1")
Suction Lift………..…………..4.2 m Dry (13.7′)
9.0 m Wet (29.5′)
Disp. per Stroke1……………....0.3 L (0.08 gal)
Max. Flow Rate…………..…182 lpm (48 gpm)
Max. Size Solids…………………3.2 mm (1/8")
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 75 lpm (19.8 gpm)
against a discharge pressure head of 2.1 bar
(30 psig) requires 2.8bar (40 psig) and
24Nm3/h (14.3 scfm) air consumption.
(See dot on chart.)
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.
Caution: Do not exceed 8.6 bar (125 psig) air supply pressure.
PERFORMANCE

WIL-11710-E-02 10
XPR260 Bolted Metal
XPR260 METAL
FULL-STROKE
PTFE-FITTED
Ship Weight…………..Aluminum 10 kg (22 lb)
316 Stainless Steel 15 kg (33 lb)
Air Inlet……………………………………….1/2"
Inlet...………………………………...25 mm (1")
Outlet………………………………...25 mm (1")
Suction Lift………….…………..4.9 m Dry (16′)
9.3 m Wet (30.6′)
Disp. per Stroke1……………....0.3 L (0.08 gal)
Max. Flow Rate………..…172 lpm (45.5 gpm)
Max. Size Solids…………………3.2 mm (1/8")
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 60 lpm (15.8 gpm)
against a discharge pressure head of 3.4 bar
(50 psig) requires 4.1bar (60 psig) and 28.9
Nm3/h (17 scfm) air consumption.
(See dot on chart.)
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.
Caution: Do not exceed 8.6 bar (125 psig) air supply pressure.
PERFORMANCE