Dover WILDEN PSG Equalizer SD Series Instruction Manual

WIL-19013-E-02
Where InnovationFlows
EOM
ENGINEERING OPERATION
& MAINTENANCE MANUAL
Equalizer
®
Surge Dampeners
Integrated SD Series (ISD) Metal
Models: ISD220, ISD420, ISD820, and ISD1520/ISD1530

WIL-19013-E-02 2
Copyright
Copyright 2021 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-19013-E-02 3
CONTENTS
SECTION 1: Precautions – Read First! ..................................................................................................... 4
SECTION 2: Wilden Designation System.................................................................................................. 5
SECTION 3: Dimensional Drawings .......................................................................................................... 6
ISD220 ...................................................................................................................................................... 6
ISD420 ...................................................................................................................................................... 6
ISD820 ...................................................................................................................................................... 7
ISD1520 .................................................................................................................................................... 7
ISD1530 .................................................................................................................................................... 8
SECTION 4: Performance ........................................................................................................................... 9
ISD220 ...................................................................................................................................................... 9
ISD420 .................................................................................................................................................... 10
ISD820 .................................................................................................................................................... 11
ISD1520 .................................................................................................................................................. 12
SECTION 5: Suggested Installation, Operation, Maintenance, and Troubleshooting ....................... 13
SECTION 6: Disassembly/Reassembly................................................................................................... 14
SECTION 7: Exploded View and Parts List............................................................................................. 19

WIL-19013-E-02 4
SECTION 1
WARNING: Always wear safety glasses when operating
a pump and/or surge dampener 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 exceed 8.6 bar (125 psig) air supply
pressure.
TEMPERATURE LIMITS:
PTFE with BUNA-N-backed 4°C to 82°C (40°F to 180°F)
CAUTION: When choosing dampener materials, be sure
to check the temperature limits for all wetted components.
CAUTION: Maximum temperature limits are based upon
mechanical stress only. Certain chemicals will
significantly reduce maximum safe operating
temperatures. Consult the 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: The process fluid and cleaning fluids must be
compatible chemically with all wetted pump components.
CAUTION: Dampener(s) should be thoroughly flushed
before installing into process lines.
CAUTION: Before any maintenance or repair is
attempted, the compressed air line to the dampener and
pump should be disconnected and all air pressure
allowed to bleed from system. Disconnect all intake,
discharge and air lines. Drain the dampener and allowing
any fluid to flow into a suitable container.
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: Dampeners cannot be used in submersible
applications.
CAUTION: Before installation, tighten all hardware.
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.
WARNING: This product can expose you to chemicals
including Nickel Chromium, Cadmium, or Cobalt, which
are known to the State of California to cause cancer
and/or birth defects or other reproductive harm.
For more information, go to www.P65Warnings.ca.gov.
PRECAUTIONS – READ FIRST!

WIL-19013-E-02 5
SECTION 2
MATERIAL CODES
MODEL
ISD = INTEGRATED SURGE DAMPENER
SIZE
220 = 25 MM (1″) THREADED PORT
420 = 38 MM (1-1/2″) THREADED PORT
820 = 51 MM (2″) THREADED PORT
1520 = 76 MM (3″) THREADED PORT
1530 = 76 MM (3″) FLANGED PORT
WETTED PATH
SZ = STAINLESS STEEL/
NOT APPLICABLE
AIR CHAMBER AND AIR VALVE
SS = STAINLESS STEEL
DIAPHRAGMS
TBL = PTFE w/BUNA-N BACK-UP, IPD
SPECIALT
Y
CODES
0014 = BSPT
0504 = DIN
NOTE: Most elastomeric materials use colored dots for identification
EQUALIZER
®
LEGEND I
SD
/
XXXX
/
SZ SS
/
TBL
SURGE
DAMPENER
INTEGRATED SD
SERIES (ISD)
MODEL
DIAPHRAGMS
AIR CHAMBER AND AIR VALVE
WETTED PATH
SIZE
WILDEN DESIGNATION SYSTEM

WIL-19013-E-02 6
SECTION 3
ISD220 DIMENSIONS
ITEM
METRIC
(mm)
STANDARD
(inch)
A
274 DIA. 10.8 DIA.
B 169 6.7
C 172 6.8
D 14 .6
E 7 .3
F 1ʺBSPT (NPT) 1ʺBSPT (NPT)
LW0498 REV. C
ISD420 DIMENSIONS
ITEM
METRIC
(mm)
STANDARD
(inch)
A
361 DIA. 14.2 DIA.
B 220 8.7
C 224 8.8
D 14 .6
E 7 .3
F 1-1/2ʺBSPT (NPT) 1-1/2ʺBSPT (NPT)
LW0498 REV. C
DIMENSIONAL DRAWING

WIL-19013-E-02 7
ISD820 DIMENSIONS
ITEM
METRIC
(mm)
STANDARD
(inch)
A
361 DIA. 14.2 DIA.
B 220 8.7
C 224 8.8
D 14 .6
E 7.3
F 2ʺBSPT (NPT) 2ʺBSPT (NPT)
LW0498 REV. C
ISD1520 DIMENSIONS
ITEM
METRIC
(mm)
STANDARD
(inch)
A
474 DIA. 18.7 DIA.
B 333 13.1
C 340 13.4
D 19 .7
E N/A N/A
F 3ʺBSPT (NPT) 3ʺBSPT (NPT)
LW0498 REV. C
DIMENSIONAL DRAWING

WIL-19013-E-02 8
ISD1530 DIMENSIONS
ITEM
METRIC
(mm)
STANDARD
(inch)
A
474 DIA. 18.7 DIA.
B 333 13.1
C 340 13.4
D 19 .7
E N/A N/A
F 76 DIN 3.0
A
NSI
A
NSI
G 191 DIA. 7.5 DIA.
H 152 DIA. 6.0 DIA.
J 19 DIA. .8 DIA.
DIN
G 200 DIA. 7.9 DIA.
H 160 DIA. 6.3 DIA.
J 18 DIA. .7 DIA.
LW0498 REV. C
DIMENSIONAL DRAWING

WIL-19013-E-02 9
SECTION 4
ISD220
Legend: ND = No Dampener; WD = With Dampener
This chart shows discharge head fluctuations for a diaphragm pump with and without a dampener. By reviewing the
variation in pressure, the level of dampening can be estimated for an application. For example, the head pressure
generated by a 25 mm (1″) pump operating at 6.89 bar (100 psig) air inlet pressure and 6.2 bar (90 psig) head
pressure varies between 1.4 bar (20 psig) and 7.9 bar (115 psig) resulting in a total pressure fluctuation of 6.6 bar (95
psig) for each stroke. When an ISD220/SZSS/TBL dampener is installed in the application, the head pressure varies
between 3.6 bar (52 psig) and 6.4 bar (93 psig) resulting in a pressure fluctuation of only 2.8 bar (40 psig).
PERFORMANCE

WIL-19013-E-02 10
ISD420
Legend: ND = No Dampener; WD = With Dampener
This chart shows discharge head fluctuations for a diaphragm pump with and without a dampener. By reviewing the
variation in pressure, the level of dampening can be estimated for an application. For example, the head pressure
generated by a 38 mm (1-1/2″) pump operating at 5.5 bar (80 psig) air inlet pressure and 4.8 bar (70 psig) head
pressure varies between 1.2 bar (18 psig) and 5.1 bar (74 psig) resulting in a total pressure fluctuation of 3.9 bar (56
psig) for each stroke. When an ISD420/SZSS/TBL dampener is installed in the application, the head pressure varies
between 3.9 bar (56 psig) and 2.4 bar (35 psig) resulting in a pressure fluctuation of only 1.4 bar (21 psig).
PERFORMANCE

WIL-19013-E-02 11
ISD820
Legend: ND = No Dampener; WD = With Dampener
This chart shows discharge head fluctuations for a diaphragm pump with and without a dampener. By reviewing the
variation in pressure, the level of dampening can be estimated for an application. For example, the head pressure
generated by a 51 mm (2″) pump operating at 6.89 bar (100 psig) air inlet pressure and 6.2 bar (90 psig) head
pressure varies between 2.3 bar (33 psig) and 6.4 bar (93 psig) resulting in a total pressure fluctuation of 4.1 bar (59
psig) for each stroke. When an ISD820/SZSS/TBL dampener is installed in the application, the head pressure varies
between 4.2 bar (61 psig) and 5.9 bar (85 psig) resulting in a pressure fluctuation of only 1.6 bar (23 psig).
PERFORMANCE

WIL-19013-E-02 12
ISD1520/1530
Legend: ND = No Dampener; WD = With Dampener
This chart shows discharge head fluctuations for a diaphragm pump with and without a dampener. By reviewing the
variation in pressure, the level of dampening can be estimated for an application. For example, the head pressure
generated by a 76 mm (3″) pump operating at 6.89 bar (100 psig) air inlet pressure and 6.2 bar (90 psig) head
pressure varies between 1.7 bar (25 psig) and 7.8 bar (113 psig) resulting in a total pressure fluctuation of 6.1 bar (88
psig) for each stroke. When an ISD1520/SZSS/TBL dampener is installed in the application, the head pressure varies
between 4.3 bar (62 psig) and 5.6 bar (81 psig) resulting in a pressure fluctuation of only 1.3 bar (19 psig).
PERFORMANCE

WIL-19013-E-02 13
SECTION 5
Wilden Equalizer Metal Surge Dampeners minimize pulsation and
protects in-line equipment.
Installation
Before installing an ISD dampener into operation, review cautions and
warnings as well as ensure that the materials of construction are
suitable for the application. Refer to Wilden’s Chemical Resistance
Guide for more information.
If installing an ISD dampener in a Wilden pump that is already in
operation, be sure to remove the pump from service and thoroughly
clean it prior to installation.
Install the ISD as shown below. A shut off valve on the inlet of ISD will
enable maintenance personnel to safely service the equipment. To
maximize effectiveness install the ISD as close as possible to the
discharge of the pump. It is important to support the pipe immediately
downstream from the ISD. Use a tee connector on the pump air
supply line and connect the line to the ISD 1/8” NPT inlet signaled by
an arrow. The ISD consumes very little air, therefore, a 1/4” hose is
more than adequate to supply enough air volume. When the air
supply to the pump is shut down, the air to the ISD will be shut off as
well.
Operation
Before putting the pulsating dampener into operation, the housing
bolts should be tightened as elements of construction tend to “settle”.
Troubleshooting
When there is a significant drop in fluid discharge pressure, there will
be a noticeable release of air through the small bleed hole in the air
regulator body. This is how the ISD metal dampener automatically
adjusts itself for optimal suppression. This is a good way of verifying
proper operation of the unit. If there is a continuous discharge of air
out this hole during steady fluid discharge pressure, the ISD is not
functioning properly and should be inspected. The ISD air regulator
body houses three O-rings which may need to be replaced.
For correct operation, the dampener will require its own air-supply
line, taken from the air supply-of the pump. The pump and dampener
are required to be connected to the same air pressure. Note that stop
or regulating valves may be placed between the pump and dampener.
The driving air has to be oil-free, dry and clean. The dampener
requires a minimum counter pressure of at least 1 bar (14.5 psig) for
optimal function. At startup, run the pump and dampener slowly prior
to full operation. Once adjusted and full of fluid, the dampener self-
regulates for all changing operating conditions.
It is recommended to tighten housing bolts after a few hours of
operation as well. Fixing bolts is necessary as well after long periods
of stoppage, extreme temperature variations, or transport/dismantling.
CAUTION: Do not exceed 8.6 bar (125 psig) air
supply pressure.
NOTE: In the event of a power failure, the shut-off valve should
be closed, if the restarting of the pump is not desirable once
power is regained.
Maintenance
When pump disassembly is required, before starting to disassemble
the pump, disconnect both the pump and the dampener from service.
Thoroughly empty and clean both the pump and dampener before
disassembly. Once maintenance is complete, refer to installation
guidance prior to putting the pump and dampener back into service.
SUGGESTED INSTALLATION, OPERATION, MAINTENANCE
AND TROUBLESHOOTING
This illustration is a generic representation of an air-operated double-diaphragm pump with an ISD metal dampener.

WIL-19013-E-02 14
SECTION 6
ISD DAMPENER DISASSEMBLY
For 1ʺISD Dampener
O-ring Pick
9/16ʺSocket Wrench
9/16ʺWrench
1/8ʺAllen Wrench
For 1-1/2 - 3ʺISD Dampener
O-ring Pick
5/8ʺSocket Wrench
5/8ʺWrench
1/8ʺAllen Wrench
Retaining Ring Pliers (3″Only)
CAUTION: Before installing an ISD dampener into operation, review cautions and
warnings as well as ensure that the materials of construction are suitable for the
application. Refer to Wilden’s Chemical Resistance Guide for more information.
NOTE: The model pictured in this section is a metal ISD220 (1ʺ) integrated surge
dampener. Your specific dampener model may vary from the configuration shown.
However, the disassembly procedure will be the same.
NOTE: Replace worn parts with genuine Wilden parts for reliable performance.
Step 1 Step 2 Step 3
Loosen bolts with socket wrench. Remove liquid chamber, inspect for
damage, and set aside.
Pull diaphragm assembly (shaft and
diaphragms) away from air chamber.
Check O-rings, if they are worn or
chemically attacked, they must be
removed with an O-ring pick and
replaced. Please refer to exploded view
and parts list for part numbers.
DISASSEMBLY / REASSEMBLY

WIL-19013-E-02 15
ISD DAMPENER REASSEMBLY
For 1ʺISD Dampener
O-ring Pick
9/16ʺSocket Wrench
9/16ʺWrench
1/8ʺAllen Wrench
For 1-1/2 - 3ʺISD Dampener
O-ring Pick
5/8ʺSocket Wrench
5/8ʺWrench
1/8ʺAllen Wrench
Retaining Ring Pliers (3″Only)
CAUTION: Before installing an ISD dampener into operation, review cautions and
warnings as well as ensure that the materials of construction are suitable for the
application. Refer to Wilden’s Chemical Resistance Guide for more information.
NOTE: The model pictured in this section is a metal ISD220 (1ʺ) integrated surge
dampener. Your specific dampener model may vary from the configuration shown.
However, the disassembly procedure will be the same.
NOTE: Replace worn parts with genuine Wilden parts for reliable performance.
Step 1 Step 2 Step 3
Install the control valve O-rings into the
bottom of the shaft using the O-ring pick.
Check that the O-ring is not damaged
during installation.
Apply 2-3 drops of Vibra-Tite123 (or
similar thread locking compound) to the
shaft threads.
Install the shaft on the backing diaphragm
until hand tight.
DISASSEMBLY / REASSEMBLY

WIL-19013-E-02 16
Step 4 Step 5 Step 6
Apply 2-3 drops of Vibra-Tite123 (or
similar thread locking compound) to the
small threaded bore.
Install the set screw and tighten using the
Allen Wrench. Be sure the screw does not
get over-tightened.
Verify the shaft is clean and apply a coat
of white EP grease to the shaft.
Step 7 Step 8 Step 9
Install the back-up diaphragm and the
shaft assembly into the air chamber. Align
the bolt holes.
Begin installing the bolts and the flat
washers.
Place the primary diaphragm over the
back-up diaphragm.
DISASSEMBLY / REASSEMBLY

WIL-19013-E-02 17
Step 10 Step 11 Step 12
Install the liquid chamber on top of the
primary diaphragm.
Place a flat washer at each bolt. Apply anti-seize to the threads of each
bolt. Install a nut on each bolt and hand
tighten.
Step 13 Step 14
Using the socket wrench, tighten all nuts
and bolts to applicable torque specifications
identified on page 18.
Note the arrow on the air chamber, pointing
to the air inlet. When installing the breather
vent, install it in the threaded hole opposite
the air inlet.
DISASSEMBLY / REASSEMBLY

WIL-19013-E-02 18
MAXIMUM TORQUE SPECIFICATIONS
Model Number Bolt Torque
ISD220
26 N•m (19 ft-lbs)
ISD420
41 N•m (30 ft-lbs)
ISD820
41 N•m (30 ft-lbs)
ISD1520/ISD1530
41 N•m (30 ft-lbs)
DISASSEMBLY / REASSEMBLY

WIL-19013-E-02 19
SECTION 7
EQUALIZER
®
SURGE DAMPENER
INTEGRATED SD SERIES (ISD) METAL
LW0499 REV. D
ALL CIRCLED PART IDENTIFIERS ARE INCLUDED IN REPAIR KITS
EXPLODED VIEW AND PARTS LISTEXPLODED VIEW AND PARTS LIST

WIL-19013-E-02 20
Model Description ISD220
/SSS/TF/…
ISD420
/SSS/TF/…
ISD820
/SSS/TF/…
ISD1520/1530
/SSS/TF/…
Item Description Qty P/N P/N P/N P/N
Air Distribution Components
1 Breather Vent, 1/8" NPT 1 73-3241-03
Breather Vent, 1/4" NPT 1 79-3241-03
2 O-Ring, Control Valve (-114, Ø.612" x Ø.103") 3 00-2870-52
O-Ring, Control Valve (-210, Ø.734" x Ø.139") 3 02-3200-52
3 Air Chamber Assembly 1 73-3645-99 74-3645-99 79-3645-99
4 Screw, Set (1/4"-20 X 1/4") 1 73-6343-03
Screw, Set (3/8"-16 X 1/4") 1 79-6343-03
5 Shaft, Dampener 1 73-3855-03 74-3855-03 79-3855-03
6 Ring,Retainer 3" 2
79-2651-03
7 Plate, Control Valve 1 79-8640-03
8 Diaphragm, Back-Up 1 73-1069-52 74-1069-52 79-1069-52
9 Diaphragm. Primary 1 73-1045-55 74-1045-55 79-1045-55
10 Nut, Lock (3/8"-16) 10 99-6471-03
Hex Nut (7/16"-14) 12 74-6427-03
Hex Nut (7/16"-14) 24 74-6427-03
11 Washer, Flat (Ø.812 X Ø.406 X .065) 20 04-6740-03
Washer, Flat (Ø.922 X Ø.469 X .080) 24 74-6734-03
Washer, Flat (Ø.922 X Ø.469 X .080) 48 74-6734-03
12 Screw, HHC (3/8"-16 x 1 1/4") 10 73-6190-03
Screw, HHC (7/16"-14 x 1 1/4") 12 74-6123-03
Screw, HHC (7/16"-14 x 1 1/2") 24 79-6123-03
13 Liquid Chamber Assembly (NPT) 1 73-4984-99 74-4984-99 75-4984-99 79-4984-99
Liquid Chamber Assembly (BSPT) 1 73-4984-99-14 74-4984-99-14 75-4984-99-14 79-4984-99-14
Liquid Chamber Assembly (ANSI) 1 79-4986-99
Liquid Chamber Assembly (DIN) 1 79-4986-99-504
LW0500 Rev. H
All boldface items are primary wear parts.
EXPLODED VIEW AND PARTS LISTEXPLODED VIEW AND PARTS LIST
EXPLODED VIEW AND PARTS LIST