IWAKI LK-F Series User manual

Read this manual before use of product
IWAKI Metering Pump
LK-F series
Instruction Manual
T268-6 '11/09
( )Country codes
IWAKI CO.,LTD. 6-6 Kanda-Sudacho 2-chome Chiyoda-ku Tokyo 101-8558 Japan
TEL:[phone] FAX:[phone](http://www.iwakipumps.jp)
Australia IWAKI Pumps Australia Pty. Ltd. TEL : [phone] FAX : [phone] Italy IWAKI Italia S.R.L. TEL : [phone] FAX : [phone]
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Belgium IWAKI Belgium n.v. TEL : [phone] FAX : 1367 2030 Malaysia IWAKIm Sdn. Bhd. TEL : [phone] FAX : [phone]
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China IWAKI Pumps (Guandong) Co., Ltd. TEL : [phone] FAX : [phone] Singapore IWAKI Singapore Pte. Ltd. TEL : [phone] FAX : [phone]
China GFTZ IWAKI Engineering & Trading (Guangzhou) TEL : [phone] FAX : [phone] Spain IWAKI Iberica Pumps, S.A. TEL : [phone] FAX : [phone]
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Thank you for selecting the Iwaki Mechanical-driven Diaphragm Type Metering Pump
model LK-F. This instruction manual has been prepared to ensure correct and safe handling
of the pump. Please read this manual carefully and thoroughly prior to operating the pump.
Pay special attention to the "Safety Instruction to Prevent Personal Injuries," "Warning," and
"Caution" messages included in this manual.
This instruction manual should be kept by each end user and within reach of the actual
operator, for quick reference when needed.
Contents
IMPORTANT INSTRUCTIONS .................................................... 1
Safety Instructions to Prevent Personal Injuries
OUTLINE OF PRODUCT............................................................. 4
1. Before Using Pump .................................. 5
2. Operating Principle ................................... 5
3. Identification Codes .................................. 6
4. Specifications and Outer Dimensions ...... 7
5. Description on Main Unit and Label ....... 20
6. Precautions for use ................................ 21
PUMP OPERATION ................................................................... 22
1. Handling Instructions ............................. 23
2. Installation .............................................. 25
3. Piping ..................................................... 26
4. Wiring ..................................................... 28
5. Operation Step ....................................... 28
MAINTENANCE .......................................................................... 32
1. Causes of Trouble and Troubleshooting . 33
2. Maintenance and Inspection .................. 35
3. Consumable Parts .................................. 36
4. Disassembly and Assembly ................... 37
Please contact the Iwaki sales office or Iwaki dealer for any inquiries
or questions regarding this product.

- 1 -
IMPORTANT INSTRUCTIONS
Important notes and statements for safe operation, preventing physical injury, and property damage,
are included on the body of the product and in the attached instruction manual.
Always Observe These Safety Instructions!
Safety Instruction to Prevent Personal Injuries
In this manual, the following symbols and signs are used to clearly indicate safety instructions.
Types of Symbols
Indicates that "Warning" or "Caution" must be exercised. Inside this tri-
angle, a concrete and practical image provided as a warning or caution
message is depicted.
Indicates a prohibited action or procedure. Inside or near this circle, a
concrete and practical image of the activity to be avoided is depicted.
Indicates an important action or procedure which must be performed or
carried out without fail. Failure to follow the instructions herein can lead
to malfunction or damage to the pump.
Warning
Nonobservance or misapplication of the
contents of the "Warning" section could
lead to a serious accident, including death
or injury.
Caution
Nonobservance or misapplication of the
contents of the "Caution" section could lead
to serious physical injury to the user or
serious damage to the product.
Export restrictions
Technical information contained in this instruction manual might be treated as controlled
technology in your countries, due to agreements in international regime for export control.
Please be reminded that export license/permission could be required when this manual is
provided, due to export control regulations of your country.

(Always read and observe the following
instructions to prevent personal injuries.)
- 2 -
●Damaged or deteriorated tools are very dangerous. Use qualified and suitable tools only.
●Use of protectors: When disassembling, assembling, and conducting maintenance or when han-
dling a dangerous type of liquid or a liquid of unknown property, be sure to wear safety gloves, a helmet,
and protective shoes. In addition, when handling wet-end parts, always wear protective goggles, masks,
etc.
●To prevent death or injury from a falling pump, make sure the rope or chain used for lifting
the pump is not accidentally cut or disconnected during installation. Make sure the rope or the chain used
to lift the pump has sufficient strength in relation to the pump load. Also, be sure not to stand underneath
a lifted or suspended pump.
●Always turn off the power supply prior to servicing the pump. Make special provisions
so that no other operator mistakenly turns on the power supply while someone is working on the pump.
In a noisy or poor visibility environment, display a sign near the power supply switch to notify others that
someone is "WORKING" on the pump. Power supply mistakenly turned on during maintenance may lead
to personal injury. Each operator must be especially careful of power supply operation.
●To ensure greater safety, check and make sure that there is no one near the pump
when switching on the power supply. The pump is not equipped with an ON/OFF switch.
Connecting the power cable or power plug supplies the power to the pump and starts the operation.
●Run the pump at the specified power supply voltage on the nameplate only.
Otherwise, fire or electric shock may result.
●If the pump operation is stopped due to a power failure or closure of discharge
line, turn off the power switch at once. After normal conditions return, turn the switch on again.
●Do not use the pump for anything that it is not designed to do. User's failure to observe
this instruction exempts Iwaki from any responsibility for personal injury or damage to the equipment or
facility caused by the pump's misuse.
●When handling a toxic or odorant liquid, ventilate the working area well. In addition, the oper-
ator must wear protector gear (such as a safety mask, safety goggles, and protective gloves).
● Do not allow toxic substances such as lubricants, solvents, or similar substances
to flow into the local sewage system or river systems. Do not drain hazardous liquids
such as chemical solutions discharged out of the pump directly onto the ground. Instead, drain such liq-
uids into some kind of container. Observe the laws and regulations related to the application, handling,
and processing of hazardous substances.
●Emergency stop
The main power switch must be accessible at any time for emergency stop.
●Do not get access to the inside of the drive unit during operation
Risk of personal injury. A reciprocating diaphragm/shaft may catch the finger or hand.
●Be sure to turn off all the related power supplies prior to any inspection/mainte-
nance and installation works (motor fan cover).
Working on the pump with power ON, any rotating part may catch the hand, finger, hair, or clothes, and it
may result in serious injury.
Warning

(Always read and observe the following
instructions to prevent personal injuries.)
- 3 -
Caution
● Wear gloves when working with rope or chain. Working with bare hands may
result in serious injury, since fingers are likely to be caught between the pump
and the rope or chain when the rope or chain is under strong tension.
● The pump is not designed to be used under water. Operate the pump on in-line
mode only.
● Provide a safety valve on the discharge line.
● Do not close any discharge or suction valve while in operation.
● Install earth leakage breaker. Otherwise, you may be electrically shocked.
●Do not install/store the pump:
• In a ammable/explosive/corrosive atmosphere.
• In a dusty/humid environment.
• Where ambient temperature can exceed 0-40ºC.
• In direct sunlight or wind & rain (except outdoor-use models).

- 4 -
OUTLINE OF PRODUCT
1. Before Using Pump ............................ 5
2. Operating Principle ............................ 5
3. Identification Codes ........................... 6
4. Specifications and
Outer Dimensions..................... 7
5. Description on Main Unit and Label.. 20
6. Precautions for use .......................... 21

- 5 -
1. Before Using Pump
After unpacking, check the following points to confirm that
the delivered product its accompanying parts and elements
are exactly what you ordered.
When lifting the pump please follow the procedure men-
tioned "2. Installation" of "pump operation".
[1] Do the model and frequency indicated on the nameplate
conform to your order?
[2] Has the pump unit or any part of it been damaged or
bolts and nuts been loosened during delivery?
If you find anything wrong, please refer to the dealer you
placed your order with.
The rotation of the motor is reduced by means of the worm
and wheel. The rotary motion is changed to a reciprocating
motion by the spring-back mechanism (including the worm
wheel shaft, slider, spring, etc.). The reciprocating motion
is transmitted to the diaphragm directly connected with the
shaft, changing the volume inside the pump chamber. Thus,
variation of the volume inside the pump chamber and the
functioning of the valves in the pump head produce pump
operation.
For adjusting the stroke length, the adjusting dial fixed on
the control shaft is rotated to change the return of the slider.
2. Operating Principle
Diaphragm
Motor
Worm wheel shaft
Slider
Dial
Control shaft
Spring
Shaft

- 6 -
3. Identification Codes
Example:
LK-F 31 VC H - 02 F E S
Series LK-F Type Series
Type symbol Refer to "4. Specifications and Outer Dimensions" on page7.
Connection None: Flange (JIS)
U : Union
H : Hose
Servo unit E: with electric servo unit
Special symbol S: Special specification other than standard
Material symbol Refer to the material table on page7.
(ex. VC, VH, VS, S6,)
Motor output 02: 0.25kW
Special motor F: Inverter motor
(Note) General-purpose motors have no symbol.

- 7 -
■ Standard Material
4. Specifications and Outer Dimensions
Material symbol
part
Pump head
Valve ball
Valve
seat
Type 11 to 32
Type 45 to 57
O ring
Valve gasket
Diaphragm
VC VH VS S6
PVC
CE
FKM
PVC
FKM
PVC
HC
EPDM
PVC
EPDM
PVC
HC
SUS304
SUS304
EPDM
SUS316
HC
SUS316
SUS316
–
PTFEPTFE
PTFE+EPDM
CE:Alumina ceramics HC:Hastelloy C267
(Note) For the actual names of the parts, refer to a paragraph which deals with the parts.
Model
Capacity
L/min
Allowable
pressure limit
MPa
Stroke speed
spm
Connection
LK-F 11
21
22
31
32
45
47
55
57
50Hz 60Hz 50Hz 60Hz
0.020 0.024
0.060
0.12
0.30
0.60
1.0
2.0
3.3
7.2
0.050
0.10
0.25
0.50
0.85
1.7
2.8
6.0
PVC * SUS * PVC *
Flange (Nominal dia)
SUS *1 PVC * PVC
Union Hose
1.0
1.0
1.0
1.0
1.0
1.0
0.8
0.5
0.3
1.5
1.5
1.5
1.5
1.5
1.5
0.8
0.5
0.3
48
48
96
48
96
48
96
48
96
58
58
116
58
116
58
116
58
116
JIS10K 15A
(VH, VC, VS)
JIS10K 25A
(LK-47VS)
JIS16K 15A
VP16
VP25
(LK-47VS)
I.D.4mm
O.D.9mm
I.D.12mm
O.D.18mm
ø25 JIS10K
* PVC refers to the material symbols VC, VH, or VS while SUS refers to the
material symbol S6.

- 8 -
■Outer dimensions
LK-F11, 21, 22, 31, 32, 45, 47, 55, 57, VC, VH, VS
L a C E jModel
272
290
350
370
208
363
363
366
370
378
184
184
186
188
196
86
95
125
135
104
123
123
123
123
123
K
15
15
15
15
25
F
LK-F11, VC, VH, VS
LK-F21, 22, VC, VH, VS
LK-F31, 32, VC, VH, VS
LK-F45, 47, VC, VH, VS
LK-F47VS
LK-F55, 57, VC, VH, VS 395 370 211 125 123 25
4 - ø 9
4 - ø 9
4 - ø 9
4 - ø 9
4 - ø 9
4 - ø 9

- 9 -
■ Outer dimensions
LK-F11, 21, 22, 31, 32, 45, 47, VCH, VHH, VSH
L a C E jModel
146
164
224
243
275
275
277
281
95
95
97
99
23
32
62
72
123
123
123
123
K
F
LK-F11, VC, VH, VS
LK-F21, 22, VC, VH, VS
LK-F31, 32, VC, VH, VS
LK-F45, 47, VC, VH, VS
ø 4 × ø 9 4 - ø 9
ø 4 × ø 9
ø 12 × ø 18
ø 12 × ø 18 4 - ø 9
4 - ø 9
4 - ø 9

- 10 -
■ Outer dimensions
LK-F11, 21, 22, 31, 32, 45, 47, 55, 57 VCU, VHU, VSU
Model
LK-F55, 57, VCU, VHU, VSU
L a C E j K
275
275
277
281
298
244
262
318
337
314
95
95
97
99
114
70
79
109
119
125
16
16
16
16
25
F
123
123
123
123
123
LK-F11, VCU, VHU, VSU
LK-F21, 22, VCU, VHU, VSU
LK-F31, 32, VCU, VHU, VSU
LK-F45, 47, VCU, VHU, VSU
4 - ø 9
4 - ø 9
4 - ø 9
4 - ø 9
4 - ø 9

- 11 -
LK-F11, 21, 22, 31, 32, 45, 47, 55, 57, S6
■ Outer dimensions
L a b C D E jModel
LK-F11 S6
LK-F21, 22 S6
LK-F31, 32 S6
LK-F45, 47 S6
LK-F55, 57 S6
87
91
109
140
208
332
332
337
343
399
70
75
92
130
160
92
92
97
101
111
60
60
60
60
104
20
25
42
80
110
123
123
123
123
123
K
15
15
15
15
25
F
4 - ø 9
4 - ø 9
4 - ø 9
4 - ø 9
4 - ø 9

- 12 -
5. Names of Parts
■ LK-F11, 21, 22, 31, 32 VC, VH, VS
No. Parts name Q'ty Material
VC VH VS
1
2
3
4
5
6
7
8
1
2
2
2
2
2
2
2
Pump head
Valve (ball check)
Valve guide
Valve seat
Valve gasket
Adapter
O-ring
O-ring
PVC
ALUMINA CERAMIC
PVC
FKM
PTFE
PVC
FKM
FKM
PVC
HASTELLOY C
PVC
EPDM
PTFE
PVC
EPDM
EPDM
PVC
HASTELLOY C
PVC
SUS304
PTFE
PVC
EPDM
EPDM
No. Parts name Q'ty Material Remarks
LK-F11 LK-F21, 22 LK-F31, 32
20
20
21
22
29
30
31
50
51
52
53
54
–
–
–
–
–
1
1
2
2
2
2
2
Hex. socket bolt
Hex. head bolt
Spring washer
Plate washer
Reinforcing plate
Diaphragm
Retainer
Nut*
Union (socket)*
Elbow*
Pipe*
Flange*
STNLS STL
STNLS STL
Steel
PTFE+EPDM
SUS304
PVC
M4 × 35 4PCS
M5 × 30 4PCS M5 × 45 6PCS
Note: The parts asterisked (*) are supplied as the flange unit.
4PCS
4PCS
1PC
6PCS
6PCS
4PCS
4PCS

- 13 -
■ LK-F11, 21, 22, 31, 32 VHH, VCH, VSH
No. Parts name Q'ty Material
VC VH VS
1
2
3
4
5
6
7
8
1
2
2
2
2
2
2
2
Pump head
Valve (ball check)
Valve guide
Valve seat
Valve gasket
Adapter
O-ring
O-ring
PVC
ALUMINA CERAMIC
PVC
FKM
PTFE
PVC
FKM
FKM
PVC
HASTELLOY C
PVC
EPDM
PTFE
PVC
EPDM
EPDM
PVC
HASTELLOY C
PVC
SUS304
PTFE
PVC
EPDM
EPDM
No. Parts name Q'ty Material Remarks
LK-F11 LK-F21, 22 LK-F31, 32
20
20
21
22
30
31
50
61
62
–
–
–
–
1
1
2
2
2
Hex. socket bolt
Hex. head bolt
Spring washer
Plate washer
Diaphragm
Retainer
Nut*
Tube insert
Ferrule
STNLS STL
STNLS STL
Steel
PTFE+EPDM
29 –Reinforcing plate Steel
SUS304
PVC
M4 × 35 4PCS
M5 × 30 4PCS M5 × 45 6PCS
4PCS
4PCS
4PCS
4PCS
6PCS
6PCS
1PC
Note: The parts asterisked (*) are supplied as a unit.

- 14 -
■LK-F11, 21, 22, 31, 32 VHU, VCU, VSU
No. Parts name Q'ty Material
VCU VHU VSU
1
2
3
4
5
6
7
8
1
2
2
2
2
2
2
2
Pump head
Valve (ball check)
Valve guide
Valve seat
Valve gasket
Adapter
O-ring
O-ring
PVC
ALUMINA CERAMIC
PVC
FKM
PTFE
PVC
FKM
FKM
PVC
HASTELLOY C
PVC
EPDM
PTFE
PVC
EPDM
EPDM
PVC
HASTELLOY C
PVC
SUS304
PTFE
PVC
EPDM
EPDM
No. Parts name Q'ty Material Remarks
LK-F11 LK-F21, 22 LK-F31, 32
20
20
21
22
29
30
31
50
51
–
–
–
–
–
1
1
2
2
Hex. socket bolt
Hex. head bolt
Spring washer
Plate washer
Reinforcing plate
Diaphragm
Retainer
Nut*
Union (socket)*
STNLS STL
STNLS STL
Steel
PTFE+EPDM
SUS304
PVC
M4 × 35 4PCS
M5 × 30 4PCS M5 × 45 6PCS
4PCS
4PCS
4PCS
4PCS
6PCS
6PCS
1PC
Note: The parts asterisked (*) are supplied as a unit.

- 15 -
■ LK-F45, 47 VHH, VCH, VSH (LK-F45 only)
No. Parts name Q'ty Material
VCH VHH VSH
1
2
3
4
5
6
7
8
1
2
2
2
2
2
2
2
Pump head
Valve (ball check)
Valve guide
Valve seat
Valve gasket
Adapter
O-ring
O-ring
PVC
ALUMINA CERAMIC
PVC
PVC
PTFE
PVC
FKM
FKM
PVC
HASTELLOY C
PVC
PVC
PTFE
PVC
EPDM
EPDM
PVC
HASTELLOY C
PVC
SUS304
PTFE
PVC
EPDM
EPDM
9 1Nut PVC PVC PVC
No. Parts name Q'ty Material Remarks
LK-F45, 47
20
21
29
30
31
50
61
62
8
8
1
1
1
2
2
2
Hex. head bolt
Spring washer
Reinforcing plate
Diaphragm
Retainer
Nut*
Tube insert
Ferrule
STNLS STL
Steel
Steel
PTFE+EPDM
SUS304
PVC
M8 × 60
Note: The parts asterisked (*) are supplied as a unit.

- 16 -
■ LK-F45, 47 VCU, VHU, VSU (LK-F45 only)
No. Parts name Q'ty Material
VCU VHU VSU
1
2
3
4
5
7
1
2
2
2
2
2
Pump head
Valve (ball check)
Valve guide
Valve seat
Valve gasket
O-ring
PVC
ALMINA CERAMIC
PVC
PVC
PTFE
FKM
PVC
HASTELLOY C
PVC
PVC
PTFE
EPDM
PVC
HASTELLOY C
PVC
SUS304
PTFE
EPDM
9 1Nut PVC PVC PVC
No. Parts name Q'ty Material Remarks
LK-F45, 47
20
21
29
30
31
51
8
8
1
1
1
2
Hex. head bolt
Spring washer
Reinforcing plate
Diaphragm
Retainer
Union (socket)*
STNLS STL
Steel
PTFE+EPDM
SUS304
PVC
M8
× 60

- 17 -
■ LK-F45, 47, 55, 57 VC, VH, VS
No. Parts name Q'ty Material
VC VH VS
1
2
3
4
5
7
1
2
2
2
2
2
Pump head
Valve (ball check)
Valve guide
Valve seat
Valve gasket
O-ring
PVC
ALUMINA CERAMIC
PVC
PVC
PTFE
FKM
PVC
HASTELLOY C
PVC
PVC
PTFE
EPDM
PVC
HASTELLOY C
PVC
SUS304
PTFE
EPDM
No. Parts name Q'ty Material Remarks
LK-F45, 47 LK-F55, 57
20
21
29
30
31
50
51
52
53
54
8
8
1
1
1
2
2
2
2
2
Hex. head bolt
Spring washer
Reinforcing plate
Diaphragm
Retainer
Nut*
Union (socket)*
Elbow*
Pipe*
Flange*
STNLS STL
FC200
PTFE+EPDM
SUS304
PVC
M8 × 60 M8 × 75
Note: The parts asterisked (*) are supplied as the flange unit.

- 18 -
■ LK-F11, 21, 22, 31, 32 S6
No. Parts name Q'ty Material
1
2
3
4
10
11
1
2
2
2
4
2
Pump head
Valve (ball check)
Valve guide
Valve seat
Valve gasket A
Valve gasket B
SUS316
HASTELLOY C
SUS316
SUS316
PTFE
PTFE
No. Parts name Q'ty Material Remarks
LK-F11 LK-F21, 22 LK-F31, 32
20
21
30
31
50
52
53
54
–
–
1
1
2
1
1
2
Hex. head bolt
Spring washer
Diaphragm
Retainer plate
Nut*
Elbow*
Pipe*
Flange*
STNLS STL
STNLS STL
SUS316
SUS316
SUS316
70 1Suction port* SUS316
71 1Discharge port* SUS316
PTFE+EPDM
SUS304
SUS304
M4 × 40 4PCS M5 × 35 4PCS M5 × 45 6PCS
4PCS 4PCS 6PCS
Note: The parts asterisked (*) are supplied as the flange unit.