IWAKI PUMPS MX-F250 User manual

Read this manual before use of product
IWAKI Magnetic Drive Pump
MX-F250/-F403 (Asia Edition)
Instruction Manual
T496-8 '15/07
http://www.iwakipumps.jp
IWAKI CO.,LTD. 6-6 Kanda-Sudacho 2-chome Chiyoda-ku Tokyo 101-8558 Japan
TEL: [phone] FAX: [phone]
European ofce / IWAKI Europe GmbH
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Norway / IWAKI Norge AS
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Australia / IWAKI Pumps Australia Pty Ltd.
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Germany / IWAKI Europe GmbH
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Sweden / IWAKI Sverige AB
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China (Hong Kong) / IWAKI Pumps Co., Ltd.
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Holland / IWAKI Europe GmbH (Netherlands Branch)
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U.K. / IWAKI Pumps (U.K.) LTD.
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China (Guangzhou) / GFTZ IWAKI Engineering & Trading Co., Ltd.
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China / IWAKI Pumps (Shanghai) Co., Ltd.
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Spain / IWAKI Europe GmbH (Spain Branch)
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Thank you for selecting an Iwaki MX-F Series Magnetic Drive Pump. This instruction manual
deals with "Safety instructions", "Outline", "Installation", "Operation" and "Maintenance"
sections. Please read through this manual carefully to ensure the optimum performance, safety
and service of your pump.
Contents
Important instructions ························································ 1
Safety instructions ····························································· 2
Outline 1. Unpacking & Inspection ..................................................6
2. Product outline.................................................................6
3. Model code.......................................................................7
4. Specification.....................................................................8
5. Dimension ........................................................................8
6. Part names........................................................................9
7. Overview ........................................................................12
Installation 1. Before installation ..........................................................14
2. Installation/Pipework/Wiring ........................................16
Operation 1. Operational precautions..................................................23
2. Before operation.............................................................24
3. Operation........................................................................24
Maintenance 1. Troubleshooting..............................................................27
2. Maintenance & Inspection.............................................28
3. Spare & Wear parts........................................................30
4. Dismantlement & Assembly ..........................................32
This instruction manual should be kept on hand by the end user for
quick reference.
Contact us or your nearest dealer if you have any questions.

- 1 -
Important instructions
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.
Nonobservance or misapplication of “Caution” sec-
tions could lead to personal injury or property dam-
age.
For the Safe and
Correct Handling of the Pump
●"Safety Instruction" section deals with important details about handling of the product. Before
use, read this section carefully for the prevention of personal injury or property damage.
●Observe the instructions accompanied with "WARNING" or "CAUTION" in this manual. These
instructions are very important for protecting users from dangerous situations.
●The symbols on this instruction manual have the following meanings:
WARNING Nonobservance or misapplication of “Warning” sec-
tions could lead to a serious accident which may
result in death.
CAUTION
Types of Symbols
Indicates that “Warning” or “Caution” must be exercised. Inside this triangle, a con-
crete 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.

- 2 -
Safety instructions
WARNING
Turning off power
Prohibited
Wear protective
gear
No Remodeling
●Turn off power before work
Be sure to turn off power to stop the pump and related devices before work.
Make sure no one turns on power by mistake while working on the pump,
otherwise it may result in a serious accident. If your working area is noisy or
dark, let other people know about the situation by displaying a notice such as
"POWER OFF (Maintenance)" near a power switch.
●Wear protective clothing
Always wear protective clothing such as eye protection and protective gloves
during pipework or dismantlement of the pump.
●Use strong ropes (chains) for lifting up the pump
Serious injury may result if lifting ropes (chains) break. Check lifting ropes
(chains) are strong enough before use. Observe the maximum weight.
●Use eye bolts
Chain the pump via eye bolts to lift it up. Otherwise the pump may acciden-
tally fall down, resulting in serious injury.
●
Do not lift the pump by gripping any plastic parts (pump unit, flange or base)
The pump can drop unintentionally as a plastic part breaks, resulting in seri-
ous injury.
●Do not remodel the pump
A remodelled pump will not be warranted. Also, we are not responsible for
personal injury or property damage due to modification.
●When handling dangerous liquid
For handling harmful liquids as mentioned below, be sure to conduct daily
inspection and maintenance for the prevention of liquid leakage. Otherwise
personal injury, explosion or fire may result.
1. Explosive or flammable liquid
2. Corrosive or stimulus toxic liquid
3. Health hazardous liquid
Caution
Caution

- 3 -
●Restriction on pump operator
The pump must be handled or operated by a qualified person with a full
understanding of the pump.
●For a specified application only
Use of the pump in any application other than those clearly specified may
result in personal injury or property damage.
●For a specied power only
Do not apply any voltage other than the specified one on the motor name-
plate. Otherwise, damage or fire may result.
●Ventilation
Poisoning may result when handling a harmful liquid. Keep good ventilation in
a work area.
●Countermeasure against efflux
Take protective measures against accidental chemical efflux and splash at
pump or piping breakage. Do not allow an outflow to directly soak into the
ground. Observe applicable codes or regulations for waste chemical disposal.
●Do not run pump dry
Do not run pump dry (Operation without liquid). Friction heart builds up dur-
ing dry running operation and damages internal parts. If the pump is operated
with a suction side valve closed or without priming, the pump runs dry.
●Do not bring the pump close to a flammable substance
Keep the pump away from a flammable substance for the prevention of fire.
●Do not stand on the pump
Do not use the pump as a platform. Injury or damage may result when the
pump turns over.
●Do not touch the pump or a pipe
Hot surface temperature. Do not touch the pump or a pipe with bare hands dur-
ing or right after hot liquid transfer. Take preventative measures against burn.
CAUTION
Prohibited
Prohibited
Prohibited
Prohibited
Caution
Fire ban
Safety instructions
Caution
Caution
Prohibited

- 4 -
●Earthing
Risk of electrical shock. Do not run the pump without earthing. Secure earth
protection to reduce the risk.
●Install an earth leakage breaker
Risk of electrical shock. Do not run the pump without a leakage breaker.
Secure a leakage breaker to reduce the risk.
●Limitations on working and storage areas
Do not install or store the pump in the following places where...
1. Ambient temperature exceeds 40 ºC or falls below 0 ºC.
2. Under a flammable/explosive atmosphere (Except explosion-proof type).
3. Under wind & rain or in a dusty/humid place (Except outdoor-use type).
4. The pump is subject to vibration.
5. Under a corrosive atmosphere such as chlorine gas.
●Starting
The pump doesn't have an ON-OFF switch. The pump starts as a power
cable is plugged in.
●Foreign matter
When foreign matters enter the pump, turn off power at once and remove
them. Using the pump with foreign matters may result in failure.
●Pump disposal
Any used or damaged pump must be disposed of in accordance with local
laws and regulations as an incombustible (Consult a licensed industrial waste
products disposing company.).
●Static electricity
When low electric conductivity liquids such as ultra-pure water and fluor inac-
tive liquid (e.g. FluorinertTM) are handled, static electricity may generate in
the pump and may cause static discharge. Take countermeasures to remove
static electricity.
CAUTION
Grounding
Prohibited
Safety instructions
Electrical shock
Caution
Caution

- 5 -
Outline
1. Unpacking & Inspection........................6
2. Product outline......................................6
3. Model code...........................................7
4. Specification.........................................8
5. Dimension.............................................8
6. Part names...........................................9
7. Overview .............................................12

- 6 -
: Liquid flow
1. Unpacking & Inspection
Outline
On unpacking the product, check the following points.
If you find any problems, contact your nearest dis-
tributor.
1. Check the information on nameplate (model code,
flow rate, head and voltage) to see if the product is
delivered as per order.
2. Check for transit damage, deformation, and loose
bolts.
Inlet
Outlet
2. Product outline
The MX-F is a magnetic drive centrifugal pump with fluoroplastic and fine ceramic wet ends and is capable of
handling a strong acid and alkali.
■ Principle of operation
The magnetic force between drive and driven magnets
rotates the impeller in the pump chamber, where a liquid
is transferred from the inlet to outlet.
Impeller
Front casing
Drive magnet
Driven magnet
Motor shaft

- 7 -
3. Model code
MX - F 400 CF V T C - 2 S
a b c d e f g
a. Pump I.D. & motor output
Code Pump I.D. (inlet × outlet) Motor output
250 25A × 25A 0.4kW
251 0.75kW
400 40A × 40A 0.4kW
401 0.75kW
402 50A × 40A 1.5kW
403 2.2kW
NOTE: The motor is 2-pole, 3-phase.
b. Sliding parts
CF: High density carbon bearing × High purity alumina ceramic spindle
RF: Filled fluoroplastic bearing × High purity alumina ceramic spindle
KK: SiC bearing × SiC spindle
c. O ring materials
V: FKM
E: EPDM
A: Aflas®
d. Impellers
T : Specific gravity limit 1.2
V : Specific gravity limit 1.5 50 Hz
W: Specific gravity limit 1.8-2.0
X : Specific gravity limit 1.2
Y : Specific gravity limit 1.5 60 Hz
Z : Specific gravity limit 1.8-2.0
e. Motors
No code: Totally-enclosed-fan-cooled motor for indoor use
C: Totally-enclosed-fan-cooled motor for outdoor use
A: Increased safety motor
f. Motor power voltage
MX-F250/-F251/-F400/-F401
(3-phase standard motor) MX-F402/-F403 (3-phase IEC motor)
2: 200/220V 2: 200/220V
4: 380/400/415V (50Hz) or 440V (60Hz) 6: 380V
9: 460V 7: 400/440V
8: 415V
9: 460V
g. Special version
S : Special version
Outline

- 8 -
4. Specification 50/60Hz
Model Inlet ×Outlet S.G. limit Motor output
MX-F250T/X
25×25
1.2 0.4kWMX-F250V/Y 1.5
MX-F250W/Z 1.8-2.0
MX-F251T/X 1.2 0.75kWMX-F251V/Y 1.5
MX-F251W/Z 1.8-2.0
MX-F400T/X
40×40
1.2 0.4kWMX-F400V/Y 1.5
MX-F400W/Z 1.8-2.0
MX-F401T/X 1.2 0.75kWMX-F401V/Y 1.5
MX-F401W/Z 1.8-2.0
MX-F402T/X
50×40
1.2 1.5kWMX-F402V/Y 1.5
MX-F402W/Z 1.8-2.0
MX-F403T/X 1.2 2.2kWMX-F403V/Y 1.5
MX-F403W/Z 1.8-2.0
■ Pump weight
Model MX-F250/-F400 MX-F251/-F401 MX-F402 MX-F403
MX-F 14.5kg 19.5kg 31.5kg 34kg
MX-F (IE3) -22kg 38kg 43kg
5. Dimension
Model W H L a b c d e f g i
MX-F250 160 255 411 130 65 130 115 140 90 163 12
MX-F251 160 255 444 130 65 130 115 140 90 163 12
MX-F251 (IE3) 160 255 446 130 65 130 115 140 90 163 12
MX-F400 140 225 411 110 54 98 95 130 87 150 12
MX-F401 160 255 457 130 72 130 115 140 103 184 12
MX-F401 (IE3) 160 255 459 130 72 130 115 140 103 184 12
MX-F402/-F403 260 280 516 208 80 200 120 160 89 157 14×36
MX-F402/-F403 (IE3) 260 280 514/543 208 80 200 120 160 89 157 14×36
NOTE: Actual dimensions may differ from the above information depending on model identification codes.
L
g
ca4-i
W
H
ed
b
f
Outline

- 9 -
Outline
6. Part names
MX-F250/-F251 & /-F401
MX-F250 MX-F251 MX-F401
No. Names Q'ty Materials Remarks Materials Remarks Materials Remarks
1 Front casing 1 CFRETFE CFRETFE CFRETFE
2 Rear casing 1 CFRETFE CFRETFE CFRETFE
3Impeller 1CFRETFE CFRETFE CFRETFE
5Drive magnet unit 1Ferrite mag.
+aluminum alloy
Ferrite mag.
+FCD450 Ferrite mag. +FCD450
8Magnet capsule 1Ferrite mag.
+CFRETFE Ferrite mag. +CFRETFE Ferrite mag. +CFRETFE
9Hex socket set screw 2Steel M8 × 10 Steel M8 × 10 Steel M8 × 10
11 Hex soch head bolt 6 Stainless
steel M8 × 35, with PW, SW Stainless steel M8 × 35, with PW, SW Stainless steel M8 × 40, with PW, SW
12 Hex soch head bolt 2 Stainless
steel M8 × 50, with PW, SW Stainless steel M8 × 50, with PW, SW Stainless steel M8 × 50, with PW, SW
13 Flange 2CFRETFE CFRETFE CFRETFE
15 Motor 10.4kW, 2P,
3-phase 0.75kW, 2P, 3-phase 0.75kW, 2P, 3-phase
16 Base 1 GFRPP GFRPP GFRPP
MX-F250/-F251 MX-F401
No. Names Q'ty Materials Remarks Remarks
CFV RFV KKV
18 Liner ring 1 Alumina ceramics 99.5% SiC
19 Rear thrust 1 CFRETFE
20 Spindle 1 Alumina ceramics 99.5% SiC
21 Bearing 1High density
carbon Filled fluoroplastics SiC
22 Mouth ring 1Filled fluoroplastics SiC
23 O ring 1 FKM JIS B 2401 G165 JIS B 2401 G165
24 O ring 2 JIS B 2401 G25 AS568-129
27 Hex soch head bolt 4 Steel M8 × 20,
with PW, SW M8 × 20, with PW, SW
13
13 22
18
3
23 21
8
20
19
2
59
15
9
24
12
1
24
11
27 16

- 10 -
MX-F400
No. Names Q'ty Materials Remarks No. Names Q'ty Materials Remarks
CFV RFV KKV
1 Front casing 1 CFRETFE 18 Liner ring 1
Alumina ceramics
99.5%
SiC
2 Rear casing 1 CFRETFE
3Impeller 1CFRETFE 19 Rear thrust 1 CFRETFE
5Drive mag-
net unit 1
Ferrite magnet
+aluminum alloy
20 Spindle 1
Alumina ceramics
99.5%
SiC21 Bearing 1High density
carbon
Filled
fluoroplastics
8Magnet cap-
sule 1
Ferrite magnet
+CFRETFE
9Hex socket
set screw 2Steel M8 × 10 22 Mouth ring 1Filled fluoroplastics
11 Hex soch
head bolt 4Stainless steel
M8 × 30,
with PW, SW
23 O ring 1 FKM
JIS B 2401
G135
12 Hex soch
head bolt 2Stainless steel
M8 × 40,
with PW, SW
24 O ring 2 AS568-129
13 Flange 2CFRETFE 27 Hex soch
head bolt 4Steel M8 × 20,
with PW, SW
15 Motor 10.4kW, 2P,
3-phase
16 Base 1 GFRPP
Outline
13
13 22
3
23 21
8
20
19
2
59
15
9
27 16
24
12
1
24
11
18

- 11 -
Outline
MX-F402/-F403
No. Names Q'ty Materials Remarks No. Names Q'ty Materials Remarks
CFV RFV KKV
1 Front casing 1 CFRETFE 18 Liner ring 1
Alumina ceramics
99.5%
SiC
2 Rear casing 1 CFRETFE
3Impeller 1CFRETFE 19 Rear thrust 1 CFRPFA
4Drive mag-
net unit 1Rear earth
magnet
+FCD450
20 Spindle 1
Alumina ceramics
99.5%
SiC
8Magnet cap-
sule 1Rear earth
magnet
+CFRETFE 21 Bearing 1High
density
carbon
Filled
fluoroplastics
9Hex socket
set screw 2Steel M8 × 10
10 Hex head
bolt 4Stainless steel
M10 × 30*,
with SW
22 Mouth ring 1Filled fluoroplastics
11 Hex soch
head bolt 7Stainless steel
M10 × 55,
with PW, SW
12 Hex soch
head bolt 1Stainless steel
M10 × 60,
with PW, SW
23 O ring 1 FKM
JIS B 2401
G195
13 Flange 1CFRETFE 24 O ring 1 AS568-136
14 Flange 1CFRETFE 25 O ring 1 AS568-129
15 Motor 11.5/2.2kW,
2P, 3-phase 26 Hex soch head bolt 4Steel M8 × 20,
with PW, SW
16 Base 1 GFRPP 27 Lock pin 2CFRETFE
17 Bracket 1FC200 *IE3 motor: M10×25
12
1
13 24
11 25
14 27 3
23 21 8
20 19
2
17
49
10 15
9
16
26
22 27
18

- 12 -
Pump unit
Not capable of self-priming. Prime the pump
via inlet or outlet before operation.
Motor nameplate
Apply the power voltage specified on
the nameplate.
(Follow an applicable local power regu-
lation.)
Outlet
Inlet
Outline
"Arrow" label
The arrow indicates a rota-
tional direction of the motor.
Make sure the motor runs in
a correct direction. Refer to
page 24, "2. Before opera-
tion".
"Do not run pump dry" label
Operating the pump without liquid
damages internal parts.
Base
Be sure to fix the base.
Motor (Drive unit)
The motor power is transmitted to
the pump.
Pump nameplate
Operate the pump in accordance
with specifications.
CAUTION
Wet a cloth with tap water and wring it out for cleaning the pump. Use a neutral deter-
gent for greasy dirt and then rub with a dry cloth. Do not wipe nameplates, labels or
pump body with any solvent.
7. Overview

- 13 -
Installation
1. Before installation ...............................14
2. Installation/Pipework/Wiring ...............16

- 14 -
1. Before installation
Always observe the following points.
■ Precautions for starting/stopping the pump
(In case the pump is in flooded suction system.)
Follow the procedures below when starting/stopping the pump for the prevention of water hammer.
Take extra care when a discharge line is long.
When starting the pump
First, prime the pump. Then turn on power to start operation with a discharge valve fully closed.
And then gradually open the valve and adjust a flow rate to a specified point.
When stopping the pump
Gradually close a discharge valve. Turn off power and stop the pump after the valve is fully closed.
NOTE: Do not close a discharge valve sharply. Otherwise an excessive pressure may damage the
pump, when using a solenoid valve, set it to close slowly.
■ Do not install or store the pump in the following places where...
• Ambient temperature exceeds 40 ºC or falls below 0 ºC.
• Ambient humidity exceeds 85%RH or falls below 35%RH.
• Under a corrosive/explosive atmosphere (Except explosion-proof type).
• The pump is exposed to rain or liquid (Except outdoor-use type).
• The pump is subject to vibration or dust.
CAUTION
●Do not run pump dry
Do not run pump dry (operation without priming water or with a suction valve
closed). Otherwise, internal parts are excessively worn by friction heat and
fatal pump damage results.
*If the pump runs dry by mistake, turn off power and leave it for more than
one hour to cool it down. Quick cooling can give rise to cracks on parts.
*An Iwaki dry run protector, the DR, is recommended for the prevention of
dry running.
●Do not bring the pump close to a flammable substance
Keep the pump away from a flammable substance for the prevention of fire.
●Do not remodel the pump
A remodelled pump will not be warranted. Also, we are not responsible for
personal injury or property damage due to any modification.
Prohibit
Prohibit
Prohibit
Installation

- 15 -
■ Always prime the pump
The MX-F is not self-priming pump. Prime the pump every time the pump is operated. Do not run pump dry (operation
without liquid.), or internal parts seizing or excessive wear results.
■ Maximum operating pressure
Do not allow a discharge pressure to exceed the limits below.
Model MX-F250 MX-F251 MX-F400 MX-F401 MX-F402/-F403
Pressrue limits (MPa) 0.25 0.33 0.22 0.28 0.43
■ Liquid conditions
Slurry
The MX-F series can not send slurry except the KK type with a SiC bearing and a SiC spindle.
The KK type can handle slurry up to 5% (concentration), 50μm (particle size) and 80Hs (hardness).
Contact us for details.
Performance change
Shaft power, discharge capacity and pump head varies depending on specic gravity and viscosity. The pump is
designed for a specied liquid. If you made a change to the specied liquid, contact us.
Temperature change
Viscosity, vapour pressure and corrosive nature vary with liquid temperature. Always take account of temperature
change.
►Allowable liquid temperatrue: 0-80°C (clean water)
►Allowable ambient temperature: 0-40°C
►Allowable ambient humidity: 35-85%RH
NOTE: Contact us for an allowable liquid temperature range at each liquid type.
■ Intermittent operation
Frequent ON-OFF operation damages the pump in a short time. Do not make ON-OFF operation more than six times
per hour.
■ Disconnection of magnet coupling
Stop the pump immediately when the magnet coupling is disconnected. Otherwise magnetic force reduces.
■ Ascending area of a spike curve (in a performance curve)
When a specified point falls on an ascending area of a spike curve (generally, a flow is small in this area. See the
standard performance curves), check and observe the following points.
• There should be no possibility of trapping air in a supply tank or a discharge line.
• A discharge valve should be installed near the pump outlet to adjust a flow rate.
Installation

- 16 -
Installation
●Turn off power before work
Be sure to turn off power to stop the pump and related devices before work.
Make sure no one turns on power by mistake while working on the pump,
otherwise it may result in a serious accident. If your working area is noisy or
dark, let other people know about the situation by displaying a notice such as
"POWER OFF (Maintenance)" near a power switch.
●
Do not lift the pump by gripping any plastic parts (pump unit, flange or base)
The pump can drop unintentionally as a plastic part breaks, resulting in seri-
ous injury.
●Electrical wiring
Electrical wiring and any work on power source must be performed by quali-
fied persons only. We are not responsible for any injury and damage due to
noncompliance with this notice.
Turning off power
Caution
2. Installation/ Pipework/ Wiring
Upon becoming aware of danger or abnormality during operation, terminate work immediately
and inspect/solve problems.
■ Carrying in and out
When carrying in and out the pump, observe the following points.
• Do not lift the pump by holding plastic parts such as a pump unit, a flange or a base.
• Pump weight is about 43kg (the largest model). Work with sufficient number of people.
• Mount the pump horizontally on a pump base.
WARNING

- 17 -
Installation
14
1
2
12
3
4
12
15
5
6
7
2
16
2
1011
12
2
13
15
17 29
1. Discharge pipe
(Support pipework to keep the pump free of
piping weigh.)
2. Gate valve
3. Check valve
4. Pressure gauge
5. Motor
6. Pump
7. Air vent/ priming line
9. Drain ditch
10. Vacuum gauge
11. Suction pipe (Pipe diameter: D)
(Horizontal sections should be shortest and
laid on a rising gradient of 1/100 toward the
pump)
12. Pipe support
13. Suction pipe (Pipe diameter: D)
14. 2D or 500mm or more
15. Expansion joint
16. Flushing line (Discharge side)
17. Flushing line (Suction side)
Installation location
• Install the pump as close to a supply tank. Keep a liquid level in the tank higher than the pump at any time (flooded
suction application).
• In case the pump is installed above a liquid level (suction lift application), lay on a priming line and mount a foot
valve to the bottom of a suction line.
NOTE: The maximum suction lift varies with liquid characteristics, specific gravity, liquid tempera-
ture and suction line length. Contact us for detail.
Outdoor use motors (Indoor use motors can not be installed out of doors)
Outdoor use motors can also be used in doors. Protect the motor and electrical power distribution equipment from
possible damage due to an accidental outflow or act of providence.
Installation space
• Select a flat and a rigid floor/foundation where is free from vibration and contortion.
• Keep a wide working area for convenience in installation and maintenance.
CAUTION
Fix the pump firmly. Support piping so as not to directory weigh on the pump.
■ Installation
Arrange pump and pipework based on the following piping layout for a long period of operation.

- 18 -
Installation
■ Foundation work
• Installation area should be larger than the footprint
of the pump. Or a plastic base may break due to a
concentrated load.
• If piping vibrates sympathetically with the pump in
operation, provide an expansion joint between the
pump and the piping to reduce vibration.
■ Tightening torque between the pump and pipework
Connect the pump to pipework via inlet and outlet flanges according to the tightening torque below. The table is
based on use of metal pipe flanges with rubber gaskets. Tighten bolts diagonally at even torque.
Model Bolt size Tightening torque
MX-F250/-F251/-F400/-F401/-F402/-F403 M16 20N•m
■ Piping load and momentum
Try not to apply a heavy load to the inlet and outlet flanges. Permissible piping weight and moment to the pump are as
below.
Z
Y
X
Z
Y
X
Shim
Foundation bolt
Liner
Concrete
Base