IWAKI PUMPS PDA-W Series User manual

Read this manual before use of product
IWAKI Auto-Dampener
PDA-W
Instruction Manual
This is patent pending product.

We thank you for selecting IWAKI Auto-dampener PDA-W series. This instruction
manual, which is divided into five sections of "Safety", "Outline of product", "Instal-
lation", "Operation" and "Maintenance", deals with the correct handling and opera-
tion procedures for the auto-dampener. To make maximum use and to ensure safe
and long time operation of the auto-dampener, please read this manual thoroughly
and carefully prior to operating the auto-dampener.
Contents
Safety section .................................................................................................1
Outline of product...........................................................................................4
1. Unpacking and inspection ..............................................................................5
2. Outline of product...............................................................................................5
3. Model code............................................................................................................5
4. Specification .........................................................................................................6
5. Dimensions and mass......................................................................................7
6. Structure and names of parts.......................................................................8
7. Main parts and labelling...................................................................................9
Installation ...................................................................................................10
1. Before use............................................................................................................11
2. Installation............................................................................................................11
3. Piping .................................................................................................................... 12
Operation ................................................................................................... 14
1. Preparation for operation ............................................................................. 15
2. Operation............................................................................................................. 15
3. Stopping ................................................................................. 16
Maintenance .................................................................................................. 17
1. Troubleshooting....................................................................... 18
2. Maintenance and inspection.................................................... 19
3. Consumable parts................................................................... 19
This instruction manual should be kept on hand by end users for quick reference. It is rec-
ommended that each user, after reading the instruction manual thoroughly, keep it in a posi-
tion close to the pump system and where it may be easily accessed by operator at any time
whenever necessary.
Contact us if you have any questions.

- 1 -
For the Safe and Correct Handling of the Auto-dampener
●Before use of the auto-dampener, read this "Safety Section" to prevent accidents and to avoid the
damage or loss of assets.
●Observe and abide by the instructions described in this "Safety Section".
These instructions are very important for protecting pump users or other persons from hazard or
loss of assets.
●Meaning of symbols
Following two symbols describe the extent of hazards and loss which may be brought if the
instructions are not observed or if the auto-dampener is wrongly used.
Warning Non observance or misapplication of the contents of the
"Warning" could lead to death or injury.
Caution Non observance or misapplication of the contents of the
"Caution" could lead to injury or damage.
Prohibited action or procedure is indicated.
Inside or near this circle, a concrete activity to be prohibited is
depicted.
Action or procedure which must be performed without fail is
indicated. Inside this circle, a concrete activity to be performed
is depicted.
Types of Symbols
Important instruction

- 2 -
WARNING
●Power off
Be sure to turn off power prior to any inspection/maintenance and
installation works. Be careful power is not turned on unintentionally
while working on the dampener. In a noisy or dark place, display a sign
of "Men Working" near the power supply switch.
●Do not remodel the auto-dampener
Never remodel the auto-dampener. Remodeling may cause serious
injury or damage due to electrical shock. We are not responsible for
any accident or damage arise from modification.
●Prohibited installation/storage place
To avoid fire or injury, do not install or store the dampener in:
• Flammable atmosphere.
• Dusty place.
• Corrosive atmosphere.
●Ventilation
Risk of poisoning. Keep your working site ventilation when handling a
toxic/odoriferous liquid.
●Wear protective clothing
Be sure to wear protective clothing such as safety goggles, protective
gloves etc. during maintenance and/or inspection.
●Returns
When the dampener is sent back to IWAKI, drain the liquid out of the
dampener and clean thoroughly with water to prevent any accidents in
transportation.
No remodeling
Prohibited
Wear protective
gear
Power off
Safety instruction

- 3 -
CAUTION
Safety instruction
●Countermeasure against static electricity
When low electric conductivity liquid such as the ultra-pure water and
the fluor inactive liquid (e.g. Fluorinert™) are handled, static electricity
may generate in the pump, which may cause a static discharge and the
pump breakage. Take a countermeasure for removing static electricity.
●When pump is stopped
• When pump is stopped, release pressure on the discharge side first.
Otherwise the bellows may be deformed due to the residual pressure
on the pump discharge side.
• If a valve is provided on the discharge side, do not close the valve
when pump is stopped to avoid impactive pressure resulting in defor-
mation of bellows or connecting plate.
●Pump at halt
• Do not supply air to both the right and left air-supply ports at the same
time to prevent the bellows from deformation.
• If the pump or dampener is stopped for a long time with the liquid
inside, the gas may be generated to penetrate the bellows and cor-
rode the metallic parts. When the pump or dampener is stopped for 2
days or more, operate them for about 10 minutes a day to replace the
air.
●Air exhaust port
Do not choke (make tube dia. smaller) air exhaust port to avoid bellows
deformation due to residual air.
●Before operating the pump & dampener
Fully open pump suction and discharge valves. Confirm that liquid is
filled in piping.
●Supply air pressure
Do not supply air exceeding 0.5 MPa to prevent bellows from deforma-
tion.
●Prohibited liquids
Do not handle the following liquids.
• Liquid easily crystallizes
• Liquid containing slurry
• Solvent naphtha, stripping agents or solvents
●Disposal of used dampener
Disposal of used or damaged dampener must be done in accordance
with local laws and regulations. (Consult a licensed industrial waste
products disposing company.)
●Do not close a discharge valve which is positioned beyond the
dampener in operation.
Impactive pressure may deform the pump and dampener.
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited

- 4 -
1. Unpacking and inspection........................5
2. Outline of product.......................................5
3. Model code..................................................5
4. Specification................................................6
5. Dimension and mass.................................7
6. Structure and names of parts..................8
7. Main parts and labelling............................9
Product outline

- 5 -
- 5 -
After unpacking the product, check the following
points to ascertain that the product is exactly your
ordered one.
(1) if the model code on the nameplate is the same as
your order.
(2) if the product is not broken or bolts and nuts are not
loosened during transportation.
IWAKI auto-dampener the PDA-W series are
exclusively designed for the pneumatic driven bel-
lows pump to dampen the liquid pulsation.
The liquid discharged from the pump is transferred
to outlet through bellows. At this moment, the sup-
ply air is automatically adjusted by the pressure
regulating valve and this functions to dampen the
liquid pulsation.
Inlet
Pressure
adjusting valve
Pressure
adjusting valve
Air supply
Bellows
Outlet
Air exhaust
PDA - 20 W -
Series code
Capacity (Max. discharge capacity of corresponding pump)
20 : 20 L/min. 40 : 40 L/min. 80 : 80 L/min.
Special version
No symbol : Standard version With symbol : Special version
1. Unpacking and inspection
2. Outline of product
3. Model code

- 6 -
-
6 -
●Notes on operation
(1) Do not handle the liquid which is apt to be crystallized or contains solids.
Otherwise life of parts is shortened.
(2) Do not use the product exceeding the max. allowable liquid and air pressure.
Otherwise the pump or dampener may fail.
(3) If the AC-3 controller is used to drive the pump, use the solenoid valve of double solenoid and 2-position type. If
single solenoid type is used, good dampening effect can not be obtained.
Note: Performance and dimensions may be changed without prior notice.
Model PDA-40W PDA-80W
Applied pump FW-40, FS-60 FW-80
Max. liquid press. (MPa)
Supply air press. (MPa) 0.2-0.5
Pulsation press width (Mpa)
Liquid pipe connection
Air piping connection
Wet end material
PDA-20W
FW-20, FS-30
10-80
0.5 0.5
Within 0.06 (in case liquid viscosity is within 1 - 50 mPa•s)
Rc 1/4 (Female)
Temp. range ( )10-100 101-150 151-180 10-100 101-150 151-180
0.3 0.2 0.5 0.3 0.2
0.2-0.5 0.15-0.3 0.15-0.2 0.2-0.5 0.15-0.3 0.15-0.2
PFA tube ø19 mm ø 16 mm PFA tube ø25 mm ø 22 mm
PTFE, PFA
4. Specification

- 7 - - 7 -
■PDA-20, 40, 80W
ABCD E FGHMass(kg)
PDA-40W 388 188 255 229 ø25 × ø22 23 36 162 12
PDA-80W 408 208 323 266 ø25 × ø22 25 38 188 17
PDA-20W 348 148 215 191 ø19 × ø16 18 33 135 7
5. Dimension and mass

- 8 -- 8 -
■PDA-20, 40, 80W
O-ring
PDA-20W S-135
PDA-40W 172 × 3
PDA-80W 194.5 × 2
*
No Name Q'ty Material Remarks
16 Slider pin 1 SUS304
17 O-ring 2 FKM *
18 Cap nut 4 SS Fluor coat
19 Plate washer 4 SS Fluor coat
20 O-ring 1 FKM S-10
21 Stopper 1 SUS304
22 Spacer A 1 PVC
23 Electrode holder 2 SUS304
24 O-ring 2 FKM P-3
25 Hex screw 2 SS M3 ×12
28 Hex bolt 6 SS
29 Spring washer 6 SS M4
26 Bellows plate 1 SUS304
27 Bellows flange 2 SUS304
No Name Q'ty Material Remarks
1Bellows unit 1 PTFE, PFA
2Cylinder 1 A6063 Fluor coat
3Plate 1 A5052 Fluor coat
4OUT guide 1 SUS304
5Slider 1 PPS
6Stud bolt 4 SUS304 PTFE coat
7Valve A 2 SUS304
8Pin nut 1 SUS304
9Pin 1 SUS304
10 Spring A 1 SUS304WPB
11 Spring B 2 SUS304WPB
12 Cover 1 A5052 Fluor coat
13 Spacer 1 PVC
14 IN guide 1 SUS304
15 Valve seat 2 FK M
6. Structure and names of parts

- 9 - - 9 -
IN label
IN label
OUT label
Cover
Fix the cover at installation
Suction port
Air supply port
Nameplate
shows model and MFG.No.
Air exhaust port
OUT label
Discharge port
7. Main parts and labelling

- 10 -
1. Before use .................................................11
2. Installation..................................................11
3 Piping..........................................................12
Installation

- 11 -
- 11 -
(1) Do not stop the supply air to the dampener while discharge piping is pressurized.
Otherwise the bellows may be deformed. Also, the pulsation reduction effect can not be received.
(2)Do not use the dampener at a higher pressure than the specified pressure of the pump.
The dampener may fail if it continuously operates exceeding the max. allowable liquid pressure and the max.
allowable supply air pressure. (Refer to 4. Specification)
(3)Do not handle the liquid which is apt to crystallize or contains slurry.
These liquids shorten the life of bellows.
(4)Pay attention to stripping agents or solvents.
• Some strippers may cause the cracks in a short time in the bellows or in piping (PFA material).
(Guarantee period is different for these liquids. Ask IWAKI.)
• Risk of fire. Do not connect the electrodes with any device including our controllers when using solvent.
(5)Surface temperature of the dampener
Model
PDA-80W
Cylinder surface temp.
40 deg.C
Liquid temp. Room temp.
80 deg.C 20 deg.C
PDA-20W 180 deg.C 74 deg.C 20 deg.C
PDA-40W 180 deg.C 66 deg.C 20 deg.C
(1) Connect tubes to Inlet and outlet of the dampener horizontally.
(2)Install the dampener between the pump and the filter, as close to the pump. Keep the tube length
between the dampener and the pump less than 1 meter.
(3)Keep a space around the dampener for maintenance work.
(4)Mount the dampener and the pump securely on a flat foundation.
1. Before use
2. Installation
WARNING
The temperature of the dampener or pipe surfaces becomes very high while a high tem-
perature liquid is pumped. Do not touch them with bare hands. Always wear protective
clothing.
WARNING
Do not connect the electrodes with any device including our controllers when using a sol-
vent. Solvents may catch fire due to a electric spark.

- 12 -
-
12 -
■Liquid piping
(1) There is the distinction of suction and discharge
side tubes of dampener. Pay attention to the con-
nection. "I" is marked for suction side and "O"
for discharge side.
(2) Keep the pump and the dampener free of any
excessive load such as piping weight when tub-
ing each devise. Support tubing to protect the
dampener from tubing vibration.
(3) In case that high temperature liquid is handled,
piping must be done so that the dampener can
not be affected by the expansion and shrinkage
of the pipe because of the heat.
(4) Install the filter in the discharge piping.
(5) Employ the tube which has the pressure resist-
ance more than that of specified max. pressure of
the dampener.
(6) For mounting of pipe joints, pay attention so
that the air can not be sucked in. Especially, the
air sucked in suction piping causes unstable or
impossible discharge.
(7) PFA tubes are equipped for suction and dis-
charge ports. Tube diameters are:
PDA-20W : 19 × 16 mm
PDA-40W : 25 × 22 mm
PDA-80W : 25 × 22 mm
Use the tube fittings which correspond to tube
diameters(See the left draw.).
Note. Pipe line tubes should have larger bore
than the suction/discharge bore.
IN OUT
Filter
Pressure
gauge
(PG2)
Exhaust
Tak e i n
Air supply source
(to seal air)
Pressure
reducing valve
Pressure
gauge
(PG2)
Suction side
Discharge side
Solenoid
valve
Pump
: Liguid piping
: Air piping
Piping example
Dampener
Attached to tube To pipe line
Attached to tube
To pipe line
Tube fitting
Tube fitting
3. Piping

- 13 - - 13 -
■Air piping
CAUTION
Use the instrument air which is dust free and dehumidified as supply air. If the supply
air contains foreign matters, water, or oil, the pressure adjusting valves may malfunction
and air may leak from the air exhaust port.
(1) Air piping should be connected to the dampener on the discharge tube beyond the pressure reducing
valve.
CAUTION
Pipe diameter must be the same as that of the pump (solenoid valve). If the pipe diam-
eter to the dampener is small, necessary air can not be supplied to the dampener inlet
because of pressure down, which will bring reduction of dampening effect or deforma-
tion of the bellows.
CAUTION
Install a pressure reducing valve for each combination of the pump/dampener. If only a
pressure reducing valve control several combinations of pump/dampener, the pulsation
reduction effect will reduce or the bellows are deformed because of the pressure down
at dampener inlet.
(2)In case that air adjusting valve is installed
If the valve (marked with * on the illustration below) is installed in the air piping for adjusting a stroke
rate of the pump, install it not to interrupt the air supply to the dampener as shown on the illustration
below.
(No good)
Air supply source
Pressure reducing valve
(Good)
To the auto-dampener
*
*
To pump (solenoid valve)
(3)When the pressure reducing valve is installed for the pump and the damper separately.
The set pressure for the damper should be equal to the damper.

- 14 -
1. Preparation for operation........................15
2. Operation ...................................................15
3. Stopping.....................................................16
OPERATION

- 15 - - 15 -
When the pump is operated first time together with the dampener, check the followings.
(1) Check to see if no damage, loosened bolts or leakage are found on dampener (pump).
(2) Air pressure adjustment
This auto-dampener automatically adjusts the air pressure to be sealed depending on handled liquid pressure, which
requires no adjustment on the dampener.
Order Operation Check items
1Start pump. Confirm if liquid is discharged normally.
3Refer to Operating Instruction of pump for details of pump operation.
4If no abnormality is found, start full operation.
2Adjust pump discharge capacity and pressure. Confirm by pressure gauge if air pressure does not
exceed specified pump pressure.
1. Preparation for operation
2. Operation
CAUTION
Right after the pump starts, the dampener exhausts air intermittently. This is because
the pressure adjusting valves function until load fluctuation is gone. Note that this is not
abnormal. Installing the muffler into the exhaust port, the exhaust noise can be reduced.
(Fitting bore: RC1/4)
CAUTION
Check that pneumatic pressure is applied to auto-dampener while pump operation. If
pneumatic pressure is not applied, pulsation dampening effect may be reduced or bellows
may be deformed.
In case the bellows of dampener is broken, it may happen the pumped liquid gets into
pneumatic piping. Take suitable protective measure in the system.
CAUTION
When the pump operates at 30 spm or below, the air is exhausted from the dampener in
sync with operation.

- 16 -
(1) Stop the pump according to the procedure mentioned in operating instructions of the pump and controller. The air
is eliminated from the dampener after stoppage.
(2) Add the supply air to the auto-dampener while pump is stopped.
(3) Before the pump is stopped for a long time, confirm that pressure is released from the dampener and then stop the
air supply.
3. Stopping
CAUTION
If air supply is interrupted when discharge piping is pressurized, the bellows may be
deformed. Be sure to release the residual pressure.
CAUTION
Do not run the pump in time-lag operation. In the time-lag operation, the bellows of auto-
dampener may fail in a short time. Also pulsation dampening effect can not be obtained.
When the auto-dampener is used, the time-lag should be zero.
Time-lag operation: When proximity switches detects the bellows movement and the
switching-over signal is transferred to the solenoid valve, the
switching-over signal is outputted with time lag. This is called "time-
lag operation". IWAKI controllers (AC-1, FD, SC and FDC) can not
operate the pump in time-lag operation. Pay attention to the time-
lag operation if the pump is operated by programmable controller or
so.

- 17 -
1. Troubleshooting........................................18
2. Maintenance & inspection......................19
3. Consumable parts....................................19
Maintenance

- 18 -
Note: Items marked (*) are done by IWAKI.
Large pulsation
(Beyond speci-
fied range)
Trouble
●Too high discharge pres-
sure.
●Air pressure adjusting valve
at intake or exhaust side is
clogged.
●Worn valve seat.
●Too low supply air pressure
to dampener.
●Broken bellows inside
dampener
Cause Countermeasure
○Check filter and replace.
○Disassemble and clean. (*)
○Replace valve seat. (*)
○Keep the supply air pressure
to dampener.
○Replace bellows unit. (*)
●Broken bellows.
(Air is mixed in discharged
liquid.)
○Replace bellows unit. (*)
●Stud bolts are not tightened
enough.
●Deterioration or deforma-
tion of O-ring.
○Tighten.
○Replace O-ring(*)
●Air pressure adjusting valve
at exhaust side is clogged.
○Disassemble and clean. (*)
Inspection & check items
a. Filter blinding or drying
b. If filter is wetted enough.
a. Check air filter.
a. Refer to item Air Piping on
Installation section.
Air is mixed in
the liquid.
a. If specified air pressure is
added to dampener.
b. If the dampener is not used
beyond specified pressure
Liquid leaks. a. If specified air pressure is
added to dampener.
b. If the dampener is not used
beyond specified pressure.
c. If residual pressure is
released.
Air leaks
(Cylinder)
a. Refer to Periodic Inspec-
tion on Maintenance and
Inspection.
Air leaks
(Air exhausting
part)
a. Check air filter.
1. Troubleshooting