IWAKI MDM Series User manual

IWAKI Magnetic Drive Pump
Instruction Manual
MDM Series (ISO Version)
Read this manual before use of product
IWAKI CO., LTD
6-6 Kanda-sudacho, 2-chome, Chiyoda-ku
Tokyo 101-8558 Japan
Tel: [phone] Fax: [phone]
T382 99/7

Thank you for selecting IWAKI Magnetic Drive Pump MDM Series. This instruction
manual, which is divided into five sections, namely "Safety", "Outline of Product",
"Installation", "Operation" and "Maintenance", deals with the correct handling and
operation procedures for the pump. To make maximum use of the pump and to
ensure safe and long time operation of the pump, please read this manual thoroughly
and carefully prior to operating the pump.
Contents
SAFETY SECTION.........................................................................................1
OUTLINE OF PRODUCT................................................................................4
1. Unpacking and inspection..............................................................................5
2. Model code............................................................................................................6
3. Conditions to be used......................................................................................7
4. Structure and names of parts.......................................................................8
INSTALLATION..............................................................................................9
5. Installation...........................................................................................................10
6. Piping.....................................................................................................................11
7. Electrical wiring.................................................................................................13
OPERATION ................................................................................................14
8. Precautions on operation.............................................................................15
9. Operation.............................................................................................................16
10. Pump stopping......................................................................16
MAINTENANCE...........................................................................................17
11. Trouble shooting....................................................................18
12. Maintenance & inspection .....................................................20
13. Disassembling & assembling.................................................21
14. Repair parts list.....................................................................27
15. Mass of pump.......................................................................35

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1
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For the Safe and Correct Handling of the Pump
• Before use of the pump, read carefully this "Safety Section" to prevent accidents and to
avoid the damage or loss of other assets.
• Observe and abide by the instructions described in this "Safety Section". These instruc-
tions are very important for protecting pump users or other persons from hazard or
from loss of assets.
• Meaning of symbols
Following two symbols describe the extent of hazards and loss which may brought if the
instructions are not observed or if the pump is wrongly used.
Following two symbols describe the content to be observed.
SAFETY SECTION
Warning Nonobservance or misapplication of the contents of the "Warning" could lead to a death or heavy injury of
person.
Caution Nonobservance or misapplication of the contents of the "Caution" could lead to a injury of person or damage of
assets.
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.

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2
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Warning
•Magnet field danger
The magnet drive pumps contain very strong magnets. The strong magnet field
could adversely affect persons who are assisted by electronic devices such as
pacemakers etc.
•Always turn off power supply prior to maintenance works etc. Pay special attention
so that no other operator turns on by mistake the power supply while someone is
working on the pump. In a noisy or poor visibility environment, display a sign near
power supply switch to notify other person that someone is "WORKING" on the
pump. Power supply mistakenly turned on during maintenance works may lead to
personal injury. Each operator must pay special attention.
•Wear protectors
When piping is removed or pump is disassembled/assembled, wear protective gear
such as safety goggles and protective gloves etc.
•Lifting pump
When pump is lifted, apply chain or belt to eye bolt and motor to keep the pump &
motor horizontally.
•No remodeling
Remodeling of pump may result in serious personal injury or damage of the pump.
Do not attempt remodeling pump because it is very dangerous.
Power off
Wear protective
gear
No Remodeling
•Dangerous liquid
When the pump is used to transfer dangerous liquids mentioned as below, the
pump must always be checked and watched so that the liquid can not be leaked.
The operation of pump leaking the liquid may result in personal injury, explosion or
fire accident.
•Explosive or flammable liquids
•Corrosive or stimulus toxic liquids
•Liquids harmful to human health
Safety Section

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3
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CAUTION
•Attention to magnetic force
This pump employs strong magnets. Special attention must be paid not to be injured
by attracting force of magnets. Follow the procedure "Disassembling and
Assembling" when the maintenance works are done.
•Do not run pump dry
Do not run pump dry (without liquid). If the pump run dry, heat is generated by rub-
bing, which causes pump damage. If the pump is operated with suction side valve
closed, the pump runs dry.
•Countermeasures for static electricity
When low electric conductivity liquid such as ultra-pure water and fluor inactive liq-
uid (e.g. Fluorinert™ are handled, the static electricity may be generated in the
pump, which may cause static discharge and pump break down. Take countermea-
sures to avoid and remove the static electricity.
•Qualified operator
The pump must be handled or operated by the person who has enough knowledge
and well acquainted with the pump.
•For specified application only
The use of pump in any application other than those clearly specified may result in
the failure or damage of the pump.
Do not run dry
•Disposal of used pump
Disposal of used or damaged pump must be done in accordance with local laws and
regulations. (Consult a licensed industrial waste products disposing company.)
•Ventilate the site
When handling the liquid which may generate toxic gas, safety measures such as
ventilation must be taken to prepare for the accidental liquid leakage.
•Countermeasure to liquid flowing out
Protective measurement must be taken against liquid flowing out caused by dam-
age of pump or pipe by accident. Also, appropriate measurement must be taken so
that the liquid can not directly flow out on the ground.
Safety Section

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4
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1. Unpacking and inspection
.......................
5
2. Model code
..................................................
6
3. Conditions to be used
...............................
7
4. Structure and names of parts
.................
8
OUTLINE OF PRODUCT

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5
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After unpacking of the pump, check the following
points.
(1) If the product is ordered one.
Check model code, discharge capacity, discharge
pressure, voltage which are written on name-
plate of pump and motor to see if they conform
to your order.
(2) If the product is not damaged or bolts are not
loosened during transportation.
(3) If accessories are attached.
Standard accessories:
Bolts for back pull-out M12 ◊ 100: 2pcs
(M10 ◊ 50 : 2pcs for MDM25-1)
Optional accessories if ordered
MODEL
HEAD (m)
CAPACITY (R//X)
k w Hz rpm
MFG.NO.
IWAKI CO.,LTD.
TOKYO JAPAN
2P405251
1. Unpacking and inspection
Eye bolt
Motor nameplate
Foot support
Pump nameplate
Baseplate
Suction port
Discharge port

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6
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MDM50 - 150 1 E KK F 075 I - D 2
q wertyui o!0
qPump discharge bore Suction Discharge
25: 40 ◊ 25
32: 50 ◊ 32
40: 65 ◊ 40
50: 80 ◊ 50
wNominal impeller diameter: 110 - 195 (mm)
eImpeller range: 1: Low head impeller type 2: High head impeller type (Available for MDM25 only)
rCasing material: E: CFR-ETFE P: PFA
tBearing/spindle material: KK:SiC/SiC CF:High density carbon/High purity ceramic
yType of motor to be mounted: F : Flange mounted motor type
uMotor output: 015 : 1.5 kW, 022 : 2.2 kW, 040 : 4.0 kW, 055 : 5.5 kW
075 : 7.5 kW, 110 : 11 kW
iStandard for connection flange/motor
I : ISO flange + IEC motor J : JIS flange + JIS motor
oDrain/special version
2. Model code
Baseplate Standard or Special version
A
With baseplate
Standard
S
D
X Special version
B
Without baseplate
Standard
Y
E
Z
Drain
Without drain Special version
With drain Standard
Without drain Special version
With drain Standard
Special version
Note: For PFA material type, air vent is always equipped for "with drain" type.
!0 Motor pole : 2 : 2 pole motor

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7
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1. Permissible pressure
Permissible pressure of the pump is 1 MPa. Pay attention so that the pump discharge pressure does not
exceed this figure.
2. Slurry containing liquid
Basically slurry containing liquid can not be handled but SiC bearing type (KK type) can handle it in the fol-
lowing conditions:
•Slurry concentration up to 5 wt%
•Slurry hardness up to 80 Hs
•Slurry size up to 50 µm
3. Performance change caused by specific gravity and viscosity of liquid
When specific gravity and viscosity are larger than water, shaft power, discharge capacity and discharge
head will change depending on specific gravity and viscosity of pumped liquid. The pump was made and
shipped according to the information given to IWAKI. If the liquid condition is changed, ask and confirm
IWAKI to use the pump without problem.
4. Influence by liquid temperature
The chemical liquid changes its viscosity, vapor pressure and corrosivity according to the temperature
change. Pay attention to the change of liquid characteristics.
3. Conditions to be used
Liquid temperature range: ETFE material type 0 - 105 deg. C
PFA material type 0 - 120 deg. C
Ambient temperature range: 0 - 40 deg. C
Ambient humidity range: 35 - 85% RH
Note: For temperature range of each chemical liquid, refer to Chemical Resistant Table on booklet
"Technical Information on MDM Series".

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8
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4. Structure and names of parts
500.3
554.3
901.3
400.3
122.2
901.1
554.1
400.2
500.1
122.1
500.2
554.2
554.4
901.7
554.5 554.6
901.2
903.1
901.4
890
554.7
901.6
330
908.1
314.3
314.4
858
161
859
310
210
801
900
159158
901.5
400.1
942
314.1
314.2
100.1 230
NO. Parts name Q'ty NO. Parts name Q'ty
100.1 Front casing 1 554.2 Spring washer 2
100.2 Cover 1 554.3 Spring washer 2
122.1 Drain plate 1 554.4 Spring washer 8 (6) Note
122.2 Air vent plate 1 554.5 Spring washer 4
158 Rear casing 1 554.6 Spring washer 4
159 Rear casing cover 1 554.7 Spring washer 2
161 Rear casing support 1 801 Motor 1
210 Spindle 1 858 Drive magnet unit 1
230 Impeller 1 859 Magnet capsule unit 1
310 Bearing 1 890 Base plate 1
314.1 Liner ling 1 900 Eye bolt 1
314.2 Mouth ring 1 901.1 Hex. head bolt 2
314.3 Rear thrust 1 901.2 Hex. head bolt 2
314.4 Rear ring 1 901.3 Hex. head bolt 2
330 Foot support 1 901.4 Hex. head bolt 8 (6) Note
400.1 Gasket 1 901.5 Hex. head bolt 4
400.2 Drain gasket 1 901.6 Hex. head bolt 4
400.3 Air vent gasket 1 901.7 Hex. head bolt 2
500.1 Plain washer 2 903.1 Hex. head bolt 5
500.2 Plain washer 2 908.1 Hex. socket head bolt 2
500.3 Plain washer 2 942 Impeller pin 2
554.1 Spring washer 2
Note: Q'ty in parenthese is for MDM25-1 (low head type)

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5. Installation
.................................................
10
6. Piping
.........................................................
11
7. Electrical wiring
........................................
13
INSTALLATION

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10
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5. Installation
Example of recommended piping
qDischarge pipe
wDischarge valve
eCheck valve
rPressure gauge
tMotor
yPump
uFlexible joint
iVacuum gauge
oSuction pipe
!0 Suction valve
!1 Gate valve
!2 Air vent piping
!3 Pipe support
1. Installed position
•Install and fix the pump on the foundation which is not affected by vibration generated by other
machines.
•Keep enough space around the pump for the back pull-out of motor, assembly and disassembly of the
pump.
•Foundation area must be larger than pump base plate.
2. Location
•Install the pump as close to the tank as possible and at lower position than the tank (flooded suction).
•If the pump is installed at the location that the pump suction port comes higher position than the
liquid level of tank (suction lift style), install the priming piping and foot valve at the end.
3. Foundation

1
2
3
11 10
13
10
12
11
65
97
4
8
7
12
Concrete foundation
Foundation bolt
Baseplate liner

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11
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6. Piping
1. Tightening of pipe flange
Table below shows the bolt size and tightening torque for the connection of pipe flange to pump flange.
Tightening torque is the figure when metallic flange and rubber gasket are used.
2. Pipe load and moment
Pipe load and moment put on the pump should not exceed the figures shown below.
Bolt size
M16
Tightening torque
78.4 N ⋅ m
Z
X
Y
X
ZY
Allowable pipe load on pump flange
Direction of load Suction flange
Fx
Fy (Pression/Tension) 0.58
Fz 0.89 0.71
Load kN
Discharge flange
MDM25, 32, 40
0.71 0.89
0.58
MDM25, 32, 40 MDM50 MDM50
1.07 1.33
0.89/0.44 1.33/0.67 0.89
1.07
Allowable moment on pump flange
Direction of load Suction flange
Mx
My 0.35
Mz 0.47 0.23
Moment kN ⋅ m
Discharge flange
MDM25, 32, 40
0.35 0.46
0.23
MDM25, 32, 40 MDM50 MDM50
0.72 0.95
0.46 0.95 0.72
0.47

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3. Suction piping
(1) Flooded suction
Flooded suction is recommended.
(2) Pipe diameter
Pipe diameter should be larger than pump inlet bore.
(3) Shortest piping
Employ less bends and shortest piping length.
(4) Straight piping
Employ straight pipe just before pump inlet port.
Pump inlet bore 50A or smaller : Straight pipe of 500 mm or longer
Pump inlet bore 65A or larger : Straight pipe of 8 times as larger than inlet port
(5) Air pocket in piping
Do not allow any projection in piping where air may be trapped along the suction pipe.
Suction pipe should have an ascending gradient of 1/100 toward the pump.
(6) Different diameter of pipes
If diameter of pump suction port is different from that of suction pipe, use the eccentric reducer pipe.
Connect the eccentric reducer pipe so that upper side is level. Residual air may not go out if it is mounted
in reverse.
(7) Gate valve in suction side
In case of flooded suction, install gate valve in suction piping. It is needed when the pump is disassem-
bled and inspected.
(8) Piping for flushing
Install pump flushing piping in case that the dangerous liquid will be handled.
(9) End of suction piping
The end of suction pipe always should be located 500 mm or more below the liquid level.
(10) In case of suction lift piping
•The end of suction piping should be 1 to 1.5 times of pipe diameter or more away from the bottom of
suction tank.
•Install foot valve or check valve in suction piping.
(11) Pipe support
Install the pipe support so that the weight of pipe can not be directly loaded to the pump.
(12) Pipe connection
Pipes must be connected securely so that the air can not be sucked in. If the sealing is not perfect, air is
sucked in, which causes pump damage.

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4. Discharge piping
(1) Pipe diameter
In case the discharge piping is long, the specified performance may not be obtained because of unexpected
pipe resistance if the pipe diameter is the same as pump bore. Calculate the pipe resistance in advance to
decide proper diameter of pipe.
(2) Gate valve
Install the gate valve in discharge piping to adjust flow rate and to protect motor from over loading. If
the check valve is also installed, recommended arrangement is : Pump /Check valve /Gate valve
(3) Pressure gauge
Install a pressure gauge in discharge piping to check the operating conditions such as discharge head
etc.
(4) Check valve
Check valve must be installed in the following cases.
•Discharge piping is longer than 15 to 20 meters.
•Actual head exceeds 15 meters.
•Height difference between liquid level and discharge pipe end exceeds 9 meters.
•When two pumps are used in parallel.
(5) Air vent
If horizontal discharge piping is longer than 15 to 20 meters, install air vent on the way.
(6) Drain
If the liquid must be drained to protect from freezing, install the drain valve.
(7) Pipe support
Install the pipe support so that the pipe weight can not be loaded to pump.
(8) Priming piping
Install piping for priming in case of suction lift.
7. Electrical wiring
Electrical works or wiring must be carried out by qualified and authorized person according to local law or
regulation.
•Use the electromagnetic switch which conforms to motor specifications such as voltage and capacity etc.
•If pump is installed outdoor, wiring must be done so that water can not get into switch.
•Electromagnetic switch and push-button switch must securely installed apart from the pump.
•Star-delta starter, inverter or soft starter must be used to start the pump which is equipped with motor of
5.5 kW or more power.

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8. Precautions on operation
......................
15
9. Operation (Starting)
................................
16
10. Pump stopping
.........................................
16
OPERATION

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15
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8. Precautions on operation
CAUTION
•Never operate pump dry or with suction side valve closed.
•Dry running possible type (model code CF type) can continuously run dry without damage one hour.
However, dry running more than one hour or repeated dry running causes quick wear of rubbing parts.
•After the pump ran dry, leave the pump one hour or more for cooling down to start it once again. If the
liquid flows into the pump just after the pump ran dry, ceramic parts are cracked due to heat shock.
•Check the direction of rotation of pump. Clockwise seen from motor fan is correct direction. If operated
in reverse, pump may be damaged.
•Stop the pump within one minute if it is operated in cavitation.
•Do not run pump with air sucking in.
•If magnetic coupling is disconnected, stop the pump within one minute.
If the pump continues to run with coupling disconnected, coupling torque is weakened.
•Intermittent operation
Frequent repetition of stop/start is not recommended. Stop/start repetition must be limited to six times
an hour.
•Temperature change at starting, stopping and operating of pump must be within 80 deg. C.
•Fully close the discharge valve when pump is started to avoid water hammer.
•If the pump is operated with discharge valve closed for a long time, the liquid temperature inside the
pump rises, which may cause pump damage. Do not run the pump for more than one minute with dis-
charge valve closed.
•If power is interrupted while pump is running, switch off pump and close discharge valve.
•Pay attention so that discharge pressure can not exceed pump allowable pressure of 1 MPa.
•Observe the allowable minimum flow rate. If the pump is operated below the allowable minimum flow
rate, bearing or rubbing parts may be seizured due to lack of lubrication and cooling.
Allowable min. flow rate MDM25 : 20 R/min.
MDM32, 40, 50 : 50 R/min.
•When high temperature liquid is transferred, pump surface becomes very hot. Take protective measure
against burn.
Liquid temp. Max. pump surface temp. (Amb. temp. 40 deg.C)
100 deg. C 90 deg. C
120 deg. C 110 deg. C
•Pump noise is 85 dB for Models MDM25, 32 & 40, and 95 dB for MDM50.

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9. Operation (Starting)
1. Fully close discharge valve and fully open suction valve.
2. Fill liquid into pump
•In case of flooded suction, confirm if suction valve is fully opened.
•In case of suction lift, prime to fill liquid into suction piping.
3. Check rotating direction of motor.
•Start motor momentarily (within a second) to check direction. Direction is shown on "arrow" mark on
pump. (Clockwise seen from motor fan side)
•Also check if motor fan smoothly stops when switched off. If it does not stop smoothly, pump rotating
parts may be locked. Check the rotating parts.
4. Air vent operation
•Before pump operation, vent the air in the pump.
•Fully open the valve in air vent piping and repeat one second running for three to five times.
•After the air vent running, fully close the discharge valve.
Note: In case air vent piping is not equipped, open the discharge valve to repeat momentary run
several times.
5. Starting pump
•Start pump with discharge valve fully closed. (Maximum one minute)
•Confirm that discharge pressure rises to shut-down pressure.
•Gradually open discharge valve to get specified pressure (capacity).
Note: Pay attention to over-load caused by excessively opened valve.
Keep minimum allowable capacity to avoid seizure of bearing or rubbing parts.
MDM25 : 20 r/min.
MDM32, 40 & 50 : 50 r/min.
10. Pump stopping
1. Slowly close the discharge valve
Quick closing of valve may cause water hammer and pump damage.
2. Switch off and stop the pump
Confirm if pump stops smoothly. If pump stops suddenly and not smoothly, inspection is needed.
3. When the pump is stopped for a long period, anti freezing measure must be taken so that the liquid can not
be frozen in the pump or piping.

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11. Troubleshooting
........................................
18
12. Maintenance & inspection
.....................
20
13. Disassembling & assembling
................
21
14. Repair parts list
........................................
27
15. Mass of pump
...........................................
35
Maintenance

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18
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11. Troubleshooting
Troubles
Liquid can
not be sucked •Lack of priming
liquid
•Dry running
•Foot valve is cl-
ogged by foreign
matters.
•Stop pump and reple-
nish pump with liquid
to re-start.
Primed liquid drops
quickly •Clean foot valve •Check if foreign mat-
ters are not adhered
to valve seat.
When disch. valve
closed
After starting, pres-
sure drops as soon
as discharge valve
is opened.
•Air is sucked from
suction pipe or
gasket.
•Check if connected
flanges are completely
sealed.
•Check if liquid level of
tank is not excessively
lowered.
•Disconnected ma-
gnet coupling •Check amperage to see if motor is not
overloaded.
•Check if foreign mat-
ters do not lock imp-
eller or magnet cap-
sule
•Check if voltage is
normal.
Press. gauge shows
low pressure •Low pump speed •Reverse rotation •Check wiring or motor. •Interchange wiring
connection.
Discharge
capacity is
small.
Pressure gauge &
vacuum gauge indi-
cates normal figure.
•Strainer is clog-
ged by foreign
matters.
•Remove foreign mat-
ters.
•Air pocket in suc-
tion piping •Check and remedy suction piping.
•Foreign matters
are clogged at
impeller inlet.
•Remove foreign mat-
ters.
•Air is sucked in
from suction pipe
or gasket.
•Check connection part
of pipes and retighten
it.
•Foreign matters
clog at discharge
side.
•Remove foreign mat-
ters.
•Remove foreign mat-
ters or scales in pip-
ing.
Symptom on pump
Cause Check & countermea-
sures
When disch. valve
opened
Press. gauge & vac-
uum gauge indicate
zero.
Pressure gauge vi-
brates and drops to
zero.
Vacuum gauge indi-
cates high figure.
Vacuum gauge indi-
cates very high fig-
ure.
Pressure gauge &
vacuum gauge vi-
brate.
Vacuum gauge indi-
cates hign but pres-
sure gauge indi-
cates normal.
•There are resis-
tance such as air
pocket etc. in suc-
tion piping.
•Check if there is not
protruded section in
suction piping.