IWAKI PUMPS MX Series User manual

Read this manual before use of product
Instruction Manual (Asia Edition)
IWAKI Magnetic Drive Pump
MX Series (MX-250/-505)
T452-8 '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
TEL: [phone] FAX: [phone]
Norway / IWAKI Norge AS
TEL: [phone] FAX: [phone]
Australia / IWAKI Pumps Australia Pty Ltd.
TEL: [phone] FAX: [phone]
Germany / IWAKI Europe GmbH
TEL: [phone] FAX: [phone]
Sweden / IWAKI Sverige AB
TEL: [phone] FAX: [phone]
China (Hong Kong) / IWAKI Pumps Co., Ltd.
TEL: [phone] FAX: [phone]
Holland / IWAKI Europe GmbH (Netherlands Branch)
TEL: [phone] FAX: [phone]
U.K. / IWAKI Pumps (U.K.) LTD.
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China (Guangzhou) / GFTZ IWAKI Engineering & Trading Co., Ltd.
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U.S.A. / IWAKI America Inc.
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China / IWAKI Pumps (Shanghai) Co., Ltd.
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Spain / IWAKI Europe GmbH (Spain Branch)
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Singapore / IWAKI Singapore Pte Ltd.
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Thank you for selecting an Iwaki MX 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 ..................................................7
2. Product outline.................................................................7
3. Model code.......................................................................8
4. Specification.....................................................................9
5. Dimension ......................................................................10
6. Part names......................................................................11
7. Overview ........................................................................15
Installation 1. Before installation ..........................................................17
2. Installation/Pipework/Wiring ........................................19
Operation 1. Operational precautions..................................................26
2. Before operation.............................................................27
3. Operation........................................................................27
Maintenance 1. Troubleshooting..............................................................30
2. Maintenance & Inspection.............................................31
3. Spare & Wear parts........................................................34
4. Dismantlement & Assembly ..........................................35
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
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.
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.

- 2 -
Safety instructions
WARNING
● Turn off power before work
Be sure to turn off all the related power supplies prior to any inspection/
maintenance and installation works. 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. 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.
● Stop operation
If you notice any abnormal or dangerous conditions, suspend operation im-
mediately and inspect/solve problems.
● Do not use the pump in any condition other than its intended purpose
The use of the pump in any conditions other than those clearly specied
may result in failure or injury. Use this product in specied conditions only.
● Do not modify the pump
Alterations to the pump carries a high degree of risk. It is not the manufac-
turer’s responsibility for any failure or injury resulting from alterations to the
pump.
● Wear protective clothing
Always wear protective clothing such as an eye protection, chemical re-
sistant gloves, a mask and a face shield during disassembly, assembly or
maintenance work. The specic solution will dictate the degree of protec-
tion. Refer to MSDS precautions from the solution supplier.
Turning off power
Prohibited
Wear protective
gear
No Remodeling

- 3 -
WARNING
● 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
serious injury.
● 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
● Do not damage a power cable
Do not pull, knot, or crush the power cable. Damage to the power cable
could lead to a re or electrical shock if cut or broken.
● Do not operate the pump in a flammable atmosphere
Do not place explosive or ammable material near the pump.
● Do not catch the finger
Magnetic force of the pump is powerful. Take care not to catch the finger in
the bracket.
Safety instructions
Prohibited
Prohibited
Prohibited
Fire ban

- 4 -
CAUTION
● Qualified personnel only
The pump should be handled or operated by qualified personnel with a full
understanding of the pump. Any person not familiar with the product should
not take part in the operation or management of the pump.
● Use specified power only
Do not apply power other than that specied on the nameplate. Otherwise,
failure or re may result. Ensure the pump is properly grounded.
● 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 oper-
ated with a suction side valve closed or without priming, the pump runs dry.
● Ventilation
Fumes or vapours can be hazardous with certain solutions. Ensure proper
ventilation at the operation site.
●Do not install/store the pump:
• In a ammable/explosive/corrosive atmosphere.
• In a dusty/humid environment.
• Where ambient temperature can exceed 0-40°C.
• Under mechanical vibrations.
• In direct sunlight or wind & rain.
●Spill precautions
Ensure protection and containment of solution in the event of plumbing or
pump damage (secondary containment).
● Do not stand on the pump
Do not use the pump as a platform. Injury or damage may result when the
pump turns over.
Safety instructions
Prohibited
Prohibited
Prohibited

- 5 -
CAUTION
● Do not touch the pump or pipe with bare hands
Risk of burning. The surface temperature of the pump or pipe rises high
along with liquid temperature in or right after operation.
● Grounding
Risk of electric shock! Always properly ground the pump. Conform to local
electric codes.
● Install a GFCI (earth leakage breaker)
An electrical failure of the pump may adversely affect other devices on the
same line. Purchase and install an earth leakage breaker separately.
● 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.
● Static electricity
When low electric conductivity liquids such as ultra-pure water and fluor
inactive liquid (e.g. FluorinertTM) are handled, static electricity may gener-
ate in the pump and may cause static discharge. Take countermeasures to
remove static electricity.
●Preventative maintenance
Follow instructions in this manual for replacement of wear parts. Do not
disassemble the pump beyond the extent of the instructions.
●Do not use a damaged pump
Use of a damaged pump could lead to an electric shock or death.
●Disposal of a used pump
Dispose of any used or damaged pump in accordance with local rules
and regulations. If necessary, consult a licensed industrial waste disposal
company.
Safety instructions
Caution
Grounding
Electrical shock
Prohibited

- 6 -
Outline
1. Unpacking & Inspection........................7
2. Product outline......................................7
3. Model code...........................................8
4. Specification .........................................9
5. Dimension...........................................10
6. Part names......................................... 11
7. Overview .............................................15

- 7 -
Outline
1. Unpacking & Inspection
On unpacking the product, check the following
points. If you find any problems, contact your
nearest distributor.
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.
2. Product outline
The MX is a magnetic drive centrifugal pump capable of handling various liquid.
■ 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.

- 8 -
3. Model code
MX - 400 C V 6 C - 2 S
a b c d e f g
a. Pump I.D. and motor output
Code Pump I.D. (Inlet × Outlet) Motor output
250 25A × 25A 0.37kW
251 0.75kW
400 40A × 40A 0.37kW
401 0.75kW
402/402H 50A × 40A 1.5kW
403/403H 2.2kW
505 65A × 50A 3.7kW
*The motor is 2-pole, 3-phase.
b. Sliding parts
C: Carbon bearing × Alumina ceramic spindle
R: Filled PTFE bearing × Alumina ceramic spindle
A: Alumina ceramic bearing × Alumina ceramic spindle (available for MX-250/-251/-400/-401)
c. O ring materials
V: FKM
E: EPDM
A: Aflas®
d. Impellers
3, 5, 7 : 50Hz
4, 6 : 60Hz
*The code “7” is used with an IE2 high efficiency motor. Applicable models are the MX-250/-251/-400/-401.
*The code “3“ and “4“ are used with an IE3 premium efficiency motor. An applicable model is the MX-401.
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-250/-251/-400/-401
(3-phase standard motor) MX-402(H)/-403(H) (3-phase IEC motor) MX-505 (3-phase IEC motor)
2: 200/220V 2: 200/220V 2: 200/220V
4: 380/400/415V (50Hz) or 440V(60Hz) 6: 380V 6: 380V
9: 460V 7: 400/440V 7: 400/440V
8: 415V 9: 460V
9: 460V
g. Special version
S : Special version
Outline

- 9 -
4. Specification
Model Inlet ×Outlet S.G. limit Motor
output
MX-250 25×25 1.0 0.37kW
MX-251 25×25 1.0 0.75kW
MX-400 40×40 1.2 0.37kW
MX-401 40×40 1.2 0.75kW
MX-402 50×40 1.2 1.5kW
MX-402H 50×40 1.0 1.5kW
MX-403 50×40 1.2 2.2kW
MX-403H 50×40 1.0 2.2kW
MX-505 65×50 1.2 3.7kW
■ Pump weight
Model MX-250/-400 MX-251/-401 MX-402/-402H MX-403/-403H MX-505
MX 13.5kg 18.5kg 30.5kg 33kg 53.5kg
MX (IE3) -22kg 38kg 43kg 64kg
Outline

- 10 -
5. Dimension
MX-250/-251/-400/-401/-402(H)/-403(H)
MX-505
Model W H L a b c d e f g k
MX-250 160 247.5 411 130 65 130 115 140 90 163 12
MX-251 160 247.5 444 130 65 130 115 140 90 171 12
MX-251 (IE3) 160 247.5 446 130 65 130 115 140 90 171 12
MX-400 140 219 411 110 54 98 95 130 87 150 12
MX-401 160 249 457 130 72 130 115 140 103 184 12
MX-401 (IE3) 160 249 459 130 72 130 115 140 103 184 12
MX-402(H)/-403(H) 260 274 516 208 80 200 120 160 89 157 14×36
MX-402(H)/-403(H)(IE3) 260 274 514/543 208 80 200 120 160 89 157 14×36
MX-505 180 330 601 140 96 220 150 180 95 175 14
NOTE: Actual dimensions may differ from the above information depending on model identification codes.
Outline
W
a
L
4×k
g
c
f
d e
H
b
a
W
f
g
c
L
b
d e
H
4×k

- 11 -
Outline
13
13 22
18
3
23 21
8
20
19
2
59
15
9
24
12
1
24
11
27 16
6. Part names
MX-250/-251/-401
No. Names Q'ty MX-250 MX-251 MX-401
Materials Remarks Materials Remarks Materials Remarks
1 Front casing 1 GFRPP GFRPP GFRPP
2 Rear casing 1 GFRPP GFRPP GFRPP
3Impeller 1GFRPP GFRPP GFRPP
5Drive magnet unit 1Ferrite mag.
+aluminum alloy
Ferrite mag.
+FCD450 Ferrite mag. +FCD450
8Magnet capsule 1Ferrite mag.
+PP Ferrite mag. +PP Ferrite mag. +PP
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 2GFRPP GFRPP GFRPP
15 Motor 1
16 Base 1 GFRPP GFRPP GFRPP
17 Adapter 1FC200 FC200 FC200
No. Names Q'ty Materials MX-250/-251 MX-401
CV/CE RV/RE AV/AE Remarks Remarks
18 Liner ring 1 Alumina ceramics 99.5%
19 Rear thrust 1 CFRPPS
20 Spindle 1 Alumina ceramics 99.5%
21 Bearing 1High density
carbon Filled PTFE Alumina ce- ramics
22 Mouth ring 1 Filled PTFE
23 O ring 1 V: FKM E: EPDM JIS B 2401 G165 JIS B 2401 G165
24 O ring 2 V: FKM E: EPDM JIS B 2401 G25 AS568-129
27 Hex soch head bolt 4 Steel M8 × 20,
with PW, SW M8 × 20, with PW, SW

- 12 -
MX-400
No. Names Q'ty Materials Remarks No. Names Q'ty Materials Remarks
CV/CE RV/RE AV/AE
1 Front casing 1 GFRPP 18 Liner ring 1 Alumina ceramics 99.5%
2 Rear casing 1 GFRPP 19 Rear thrust 1 CFRPPS
3Impeller 1GFRPP 20 Spindle 1 Alumina ceramics 99.5%
5Drive mag-
net unit 1
Ferrite magnet
+aluminum alloy
21 Bearing 1Carbon Filled
PTFE
Alumina
ceramics
99%
8Magnet cap-
sule 1
Ferrite magnet
+PP
22 Mouth ring 1Filled PTFE
9Hex socket
set screw 2Steel M8 × 10 23 O ring 1 V: FKM E: EPDM JIS B 2401 G135
11 Hex soch
head bolt 4Stainless steel
M8 × 30,
with PW, SW
24 O ring 2 V: FKM E: EPDM AS568-129
12 Hex soch
head bolt 2Stainless steel
M8 × 40,
with PW, SW
27 Hex soch
head bolt 4Steel M8 × 20,
with PW, SW
13 Flange 2GFRPP
15 Motor 1
16 Base 1 GFRPP
17 Adapter 1FC 200
Outline
13
13 22
3
23 21
8
20
19
2
59
15
9
27 16
24
12
1
24
11
18

- 13 -
Outline
MX-402(H)/-403(H)
No. Names Q'ty Materials Remarks No. Names Q'ty Materials Remarks
CV/CE RV/RE
1 Front casing 1 GFRPP 18 Liner ring 1 Alumina ceramics 96%
2 Rear casing 1 GFRPP 19 Rear thrust 1 CFRPEEK
3Impeller 1GFRPP 20 Spindle 1 Alumina ceramics 99.5%
4Drive mag-
net unit 1Rear earth
magnet
+FCD450
21 Bearing 1Carbon Filled PTFE
8Magnet cap-
sule 1Rear earth
magnet
+PP
22 Mouth ring 1 Filled PTFE
23 O ring 1 V: FKM E: EPDM JIS B 2401
G195
9Hex socket
set screw 2Steel M8 × 10 24 O ring 1 V: FKM E: EPDM AS568- 136
10 Hex head
bolt 4Stainless steel
M10 × 30*,
with SW
25 O ring 1 V: FKM E: EPDM AS568-
129
11 Hex soch
head bolt 7Stainless steel
M10 × 45,
with PW, SW
26 Hex soch
head bolt 4Steel M8 × 20,
with PW, SW
12 Hex soch
head bolt 1Stainless steel
M10 × 60,
with PW, SW
27 Lock pin 2GFRPPS
13 Flange in 1GFRPP *IE3 motor: M10×25
14 Flange out 1GFRPP
15 Motor 1
16 Base 1 GFRPP
17 Adapter 1FC200
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

- 14 -
MX-505
No. Names Q'ty Materials Remarks No. Names Q'ty Materials Remarks
CV/CE RV/RE
1 Front casing 1 GFRPP 18 Liner ring 1 Alumina ceramics 99.5%
2 Rear casing 1 GFRPP 19 Rear thrust 1 CFRPEEK
3Impeller 1GFRPP 20 Spindle 1 Alumina ceramics 99.5%
4Drive magnet unit 1Rear earth magnet
+FCD450
21 Bearing 1Carbon Filled PTFE
8Magnet capsule 1Rear earth magnet
+PP
22 Mouth ring 1 Filled PTFE
23 O ring 1 V: FKM E: EPDM JIS B 2401
G230
9Hex socket set
screw 2Steel M8 × 10 24 O ring 1 V: FKM E: EPDM JIS B 2401 G70
10 Hex head bolt 4 Stainless
steel
M12 × 35,
with SW
25 O ring 1 V: FKM E: EPDM JIS B 2401
G55
11 Hex soch head
bolt 6Stainless steel
M10 × 45,
with PW, SW
27 Lock pin 2GFRPPS
12 Hex soch head
bolt 2Stainless steel
M10 × 75,
with PW, SW
13.1 Flange in inner 1GFRPP
13.2 Flange in outer 1GFRPP
14.1 Flange out inner 1 GFRPP
14.2 Flange out outer 1GFRPP
15 Motor 1
17 Adapter 1FC200
Outline
12
1+18
13.2
13.1
24
11 25
14.2
14.1
27
3
23
21 820 19
2
17
49
10
15
9
22 27

- 15 -
Outline
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
Pump unit
Not capable of self-priming.
Prime the pump via inlet or
outlet before operation.
Outlet
Inlet
"Arrow" label
The arrow indicates a rotational direction of
the motor. Make sure the motor runs in a cor-
rect direction. Refer to page 27, "2. Before
operation".
"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.
Motor nameplate
Apply the power voltage specified on the
nameplate (follow an applicable local
power regulation.)

- 16 -
Installation
1. Before installation ...............................17
2. Installation/Pipework/Wiring ...............19

- 17 -
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 dam-
age the pump, when using a solenoid valve, set it to close slowly.
■ Do not install or store the pump:
• Where ambient temperature can exceed 40 ºC or falls below 0 ºC.
• Where ambient humidity can exceed 85%RH or falls below 35%RH.
• In a corrosive/explosive environment.
• In direct sunlight or wind & rain (except outdoor-use type).
• Under mechanical vibration.
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 operate the pump in a flammable atmosphere
Do not place explosive or ammable material near the pump.
● Do not modify the pump
Alterations to the pump carries a high degree of risk. It is not the manufac-
turer’s responsibility for any failure or injury resulting from alterations to the
pump.
Prohibit
Prohibit
Prohibit
Installation

- 18 -
■ Always prime the pump
The MX is not a 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-250 MX-251 MX-400 MX-401 MX-402
/-403
MX-402(H)
/-403(H) MX-505
Pressrue limits (MPa) 0.25 0.33 0.22 0.28 0.43 0.5 0.33
■ Liquid conditions
Slurry
The MX series can not send slurry except the pumps with a SiC bearing and a SiC spindle (sliding parts
code: A).
The A 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 vary depending on specic gravity and viscosity. The
pump is designed for a specied liquid. If you made a change to the liquid property, contact us.
SiC bearing
A SiC bearing can be worn greater than other materials depending on liquid property including liquid vis-
cosity. Contact us for detail.
Temperature change
Viscosity, vapour pressure and corrosive nature vary with liquid temperature. Always take account of tem-
perature 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 the 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