IWAKI MDW Series, MDW50 MDW80, MDW100 Instruction Manual

Read this manual before use of product

IWAKI Magnetic Drive Pump

MDW Series

Instruction Manual

Thank you for selecting an Iwaki MDW Magnetic Drive Pump. This instruction manual deals

with "Safety instructions", "Outline", "Installation", "Operation" and "Maintenance" sec-

tions. Please read through this manual carefully to ensure the optimum performance, safety

and service of your pump.

Contents

Safety instructions ·········································································· 1

Outline 1. Unpacking & Inspection

..................................................

7

2. Product outline

.................................................................

7

3. Model code

.......................................................................

8

4. Overview

..........................................................................

9

5. Dimensions

.....................................................................

10

6. Precautions for use

.........................................................

11

Installation 1. Before installation

..........................................................

15

2. Pipework

........................................................................

16

3. Wiring

............................................................................

19

Operation 1. Before operation

.............................................................

21

2. Operation

........................................................................

22

3. Shutdown

........................................................................

23

Maintenance 1. Troubleshooting

..............................................................

25

2. Maintenance & Inspection

.............................................

26

3. Spare & Wear parts

........................................................

31

4. Assembly & Disassembly

..............................................

33

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 -

Safety instructions

For exportation

Information contained within this instruction manual may be considered controlled technol-

ogy as set by the Japanese Ministry of Economy, Trade and Industry (METI). An export

license issued by METI may be required when exporting or providing the manual to a 3rd

party.

Nonobservance or misapplication of “Caution” sec­tions could lead to personal injury or property dam­age.

For the Safe and

Correct Handling of the Pump

ŏ

"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.

ŏ

Observe the instructions accompanied with "WARNING" or "CAUTION" in this manual. These

instructions are very important for protecting users from dangerous situations.

ŏ

The symbols on this instruction manual have the following meanings:

WARNING

Nonobservance or misapplication of “Warning” sec­tions 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 -

Ɣ Access limitation

The magnet drive pump has a pair of strong magnets (the magnet capsule

unit and drive magnet). The strong magnet field could adversely affect the

persons who are assisted by electronic devices such as the pacemaker.

Ɣ 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.

Ɣ Wear protective clothing

Always wear protective clothing such as eye protection and protective

gloves during pipework or dismantlement of the pump.

Ɣ Do not remodel the pump

Do not remodel the pump. We are not responsible for personal injury or

property damage due to any modification.

Ɣ When handling dangerous liquid

For the transfer of the harmful liquid as mentioned below, be sure to conduct

daily inspection and maintenance for the prevention of liquid/gas leakage.

1. Explosive or flammable liquid

2. Corrosive chemicals

3. Harmful liquid or gas

Ɣ 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.

Ɣ Lift the pump with eye bolts or lifting holes

Use an eye bolt when lifting the pump unit only. Use lifting holes on the base

if the pump unit is mounted on it. In this case do not use the eye bolts.

WARNING

Turning off p ower

Prohibited

Wear protective

gear

No Remodeling

Safety instructions

- 3 -

Ɣ Magnetic force affects magnetic disks/cards and wrist watches

A pair of strong magnets is mounted in the pump and its magnet force may affect

magnetic disks/cards or wrist watches. Do not bring them close to the pump.

Ɣ A qualified operator only

The pump must be handled or operated by a qualified person with a full

understanding of the pump.

Ɣ A specified application only

The use of the pump in any purpose other than those clearly specified may

result in personal injury or property damage. Use this product in a specified

condition.

Ɣ A specified power only

Risk of fire, electrical shock or pump failure. Do not apply any power other

than the one specified on the motor label.

Ɣ Keep good ventilation

Poisoning may result when handling a toxic or odorous liquid. Install an air

fan in order to reduce the possibility of health damage.

Ɣ Countermeasure against efflux

Take a protective measurement against an accidental chemical overflow

results from pump or piping breakage. Do not soak chemicals into the

ground directory.

Ɣ Do not run pump dry

Running the pump without liquid, friction heat damages the inside of pump.

Dry running takes place when starting the pump with a closed suction line

or without priming.

Ɣ Keep the pump away from a flammable substance

Otherwise, fire may result.

Ɣ When unpacking a wooden box

Be careful not to be injured by nails or sprinters.

CAUTION

Prohibited

Fire ban

Prohibited

Caution

Prohibited

Prohibited

Prohibited

Safety instructions

- 4 -

Ɣ Do not stand on the pump

Personal injury may result as the pump turns over.

Ɣ Do not touch the pump or pipe with bare hands

The surface temperature of the pump or pipe rises high along with liquid

temperature in or right after operation.

Ɣ Earth connection

Always earth the pump in order to reduce the risk of electrical shock.

Ɣ Install an earth leakage breaker

Risk of electrical shock. Do not use the pump without an earth leakage

breaker.

Ɣ Do not install or store the pump in the following places where...

1. Ambient temperature is beyond 0-40°C.

2. Ambient humidity is beyond 35-85%RH.

3. Under a flammable or an explosive atmosphere or in a dusty place.

4. Under wind and rain.

5. Under vibration.

6. Under a corrosive atmosphere such as chlorine gas.

Ɣ Remove foreign matters

Turn off power as soon as foreign matters enter the pump in order to

remove them. Otherwise, the pump may be damaged.

Ɣ Disposal of the used pump

Dispose of a used pump in accordance with local laws and regulations

(Consult a licensed industrial waste products disposing company.).

Ɣ Do not drop the pump down

The pump itself and its individual parts are heavy due to its largeness.

Personal injury may result when one of them falls down. Keep a work space

wide enough and use necessary equipment for secure your safety.

Prohibited

Grounding

Prohibited

Prohibited

Caution

CAUTION

Safety instructions

- 5 -

Ɣ Do not touch a rotating part

A pump shaft and a motor shaft may be coupled barely. Be sure to cover the

coupling in order to reduce the risk of personal injury which may occur as

coming in contact with the coupling in operation.

Ɣ Take countermeasures against static electricity

When low electric conductivity liquids such as ultra-pure water and fluor

inactive liquid (e.g. Fluorinert

TM

) are handled, static electricity may be gener-

ated in the pump and may cause static discharge.

Ɣ Conduct degassing before load operation

Always prime the pump and remove air before operation. Make sure that air

is completely expelled from both a discharge and a suction line. Especially,

the air in a suction line can cause dry running and damage sliding parts

when it enters the pump at once. Note that hydrogen peroxide and sodium

hypochlorite easily generate gas and degassing is needed frequently.

Ɣ Do not incinerate plastic parts

Fluoroplastic parts are used in this product. Throwing fluoroplastics into the

fire is accompanied with harmful gas. Dispose of fluoroplastics as an incom-

bustible.

Safety instructions

CAUTION

- 6 -

Outline

1. Unpacking & Inspection ........................ 7

2. Product outline ...................................... 7

3. Model code ........................................... 8

4. Overview ...............................................9

5. Dimensions ......................................... 10

6. Precautions for use ............................. 11

- 7 -

On unpacking the product, check the following

points. If you find any problems, contact your

nearest distributor.

1. Check the information on labels for model codes,

a flow rate, head & power voltage and the deliv-

ery is as per order.

2. Check if attachments are complete. Also, check

optional products.

<Attachment list>

a. Guide bolts (Two each)

b. Hexagon bolts (M12×130: Two each)

<Optional product list>

Spare parts or peripheral devices such as the

dry run protector.

3. Check for transit damage.

4. Check for loose bolts.

2. Product outline

An Iwaki magnetic drive pump, the MDW, is a long coupled pump. This large-scale process magnet

pump has fluoroplastic and fine ceramic wet ends and is capable of sending most chemicals includ-

ing strong acid and alkaline.

Ŷ Principle of operation

The long coupled motor unit rotates the driven

magnet in the pump unit.

An impeller rotates in the pump chamber along with

the driven magnet to transfer liquid from the inlet to

outlet.

Outline

1. Unpacking & Inspection

a. Guide bolts b. Hexagon bolts

Drive magnet

Outlet

Inlet

Impeller

Driven magnet

Pump chamber

: Flow direction

: Impeller rotation

- 8 -

3. Model code

MDW 50 - 260 P K Z C 450 J - E 2

a b c d e f g h i j k

a. Series name

MDW: A long coupled pump with a foot mounted motor

b. Pump bore size & Motor output

Model

Pump bore size

(Inlet × Outlet)

Motor output (kW)

Weight (kg)

2P 4P

MDW50 80A × 50A 22/30/37/45/55/75

11/15/18.5/22/37

155

MDW80 125A × 80A

37/45/55/75 170

MDW100 125A × 100A

c. Impeller nominal diameter

170 - 260

d. Wet end materials

E: ETFE + PFA P: PFA

e. Bearing/Thrust/Sleeve

K: SiC/SiC/SiC

f. O ring material

Z: Kalrez

®

g. Motor unit

C: Foot mounted motor

h. Motor output

110: 11kW, 150: 15kW, 185: 18.5kW, 220: 22kW, 300: 30kW
370: 37kW, 450: 45kW, 550: 55kW, 750: 75kW

i. Flange & Motor standard

I: ISO flange/ IEC motor

J: JIS flange/ JIS motor

A: ANSI flange/ JIS motor

j. Drain

Code Drain port/Air vent port Delivery state Standard/Special version

A

No drain port provided
No air vent port provided

A pump on a base

Standard
S Special version
D

A drain port provided
An air vent port provided

Standard
X Special version
B

No drain port provided
No air vent port provided

Pump unit

• No base

• No coupling

• No coupling cover

Standard
Y Special version
E

A drain port provided
An air vent port provided

Standard
Z Special version

k. Pole number

2: Two 4: Four

Outline

- 9 -

Pump label

Observe the specification
on the pump label.

Drain port

(Drain plate)
Provided as requested.
Note that liquid can not be
drained completely through
this port. Pay attention to
residual liquid.

Motor unit

Transfers torque to the pump
unit via a long coupling.
Observe the power voltage
specified on the motor label.

Rotational direction

The pump must rotate along
with the rotational direction.

Base

The pump on a base. The base is
provided if requested.
Always mount the pump on the base.

4. Overview

The illustration below shows a long coupled pump on the base.

Coupling cover

Covers the coupling. Do not put
the hand or finger into a joint gap.

Outline

Air vent por t

(Air vent plate)
Provided as
requested.

Pump unit

Outlet

Inlet

CAUTION
Wet a cloth with tap water and wring it out for cleaning the pump.
Use a neutral detergent for greasy dirt and then rub with a dry cloth. Do not wipe labels or
the pump body with any solvent.

CAUTION
Turn off main power before cleaning. Be careful not to wet the motor unit (terminal box and
fan cover) and wiring. Otherwise electrical shock or short circuit may result.

Pump unit

- 10 -

5. Dimensions

See an approved drawing for part names and structure.

Ŷ Pump unit

See the approval drawing for detail dimension.

MDW80

MDW100

500

125

ø165

ø200

(405)

180

320

500

125

ø200

ø250

(505)

225

400

500

125

ø220

ø250

(480)

200

360

MDW50

Outline

- 11 -

6. Precautions for use

Read through this section before operation.

CAUTION

Ɣ Do not run pump dry

Sliding parts always need liquid in the pump chamber for lubrication and cool­ing. Do not produce dry running or closed-discharge operation. The pump
unit will be damaged.
* If the pump runs dry by mistake, turn off power and leave it for more than

one hour to cool it down. Do not refill the pump chamber soon. Quick cooling
can give rise to cracks on parts.

Ɣ Be sure to prime the pump before operation

Always prime the pump when it is empty, for example, the pump is used for
the first time or after dismantlement/assembly. Running the pump without
priming water, internal parts are excessively worn by friction heat and fatal
pump damage results.

Ɣ A specified application only

Do not use the pump in anything other than a specified purpose. Observe the
specification described on the pump or motor label.

Ɣ A qualified operator only

The pump must be handled or operated by a qualified person with a full
understanding of the pump. Any person who is not familiar with this product
should not take part in the operation or management.

1. Use this pump for sending a liquid only

This pump is not capable of closed-discharge operation. Always keep the minimum flow.

Minimum flow

Model

Motor poles

2P 4P

MDW50 12m³/hr (200Ɛ/min) 12m³/hr (200Ɛ/min)

MDW80/100 60m³/hr (1000Ɛ/min) 12m³/hr (200Ɛ/min)

2. Observe the following conditions. Contact us or your nearest distributor for detail.

a. The pump is not capable of slurry and should not be used for it.

b. Maximum liquid viscosity: 120mPa•s Contact us before sending a liquid over 120mPa•s.

c. Liquid temperature range:

MDW50: -10 - 120°C

MDW80/100: -10 - 105°C

Allowable liquid temperature range varies with chemical liquid. Contact us when a liquid temperature is

at or below 0°C.

d. Ambient temperature: 0-40°C

e. Ambient humidity: 35-85%RH

*Before operation, see the specification sheet for pump performance.

Outline

Prohibited

Observe the freezing and boiling points of the chemical liquid.

- 12 -

3. Maximum operating pressure (Discharge pressure limit)

See the graph below for the maximum operating pressure. Always keep a pressure in the pump head

within the limit, taking account of specific gravity and suction pressure.

4. Liquid temperature at each model

* Note that viscosity, vapour pressure or corrosiveness changes with liquid temperature. The change is

shown in performance such as flow rate while the pump itself is not affected.

a. The pump may not send bubbly liquid or high vapour temperature liquid. The allowable liquid tempera-

ture range changes with chemical liquid.

b. Contact us when liquid temperature is at or below 0°C or beyond the allowable liquid temperature

range. The relation between temperature and viscosity, corrosion resistance, freezing, and condensing

need to be taken into consideration.

c. The allowable liquid temperature range changes with each chemical. See the corrosion resistant table

in a separate volume of the Technical information for the allowable liquid temperature range at each

chemical.

5. When sending high or low temperature liquid

For high temperature liquid transfer, observe the operating temperature limit of the motor. For low tem-

perature liquid transfer, condensation may build up on the drive magnet and rear casing. In this case, con-

duct dehumidification.

Surrounding temperature range: 0- 40°C
Ambient humidity range: 35-85%RH

Allowable liquid temperature range

-10 0 105 120

MDW80/100

MDW50

80

Outline

80 105

1.6

MDW80/100

40

60

20

-10

0.5

1.0
Allowable area

80 100 120

Liquid temperature (ºC)

1.6

Pressure limit (MPa)

MDW50

40

60

20

-10

0.5

1.0
Allowable area

1.5

0

1.5

0

Liquid temperature (ºC)

Pressure limit (MPa)

Liquid temperature

- 13 -

6. Slurry

This pump is not designed for sending slurry but then is able to send slurry depending on concentration,

particle size and hardness. Contact us for detail.

7. Performance change with specific gravity and viscosity

Shaft power, a flow rate and a delivery head vary with the specific gravity and viscosity of liquid. The

pump is designed according to a specified condition. Contact us before changing the specified condition.

8. Use of pump under a negative pressure

Do not use the pump under a negative pressure. Otherwise, the rear casing may deform. If a decompres-

sion tank or sealed tank is used in your system, always keep the discharge pressure in the pump head to

atmospheric pressure or more at any time during operation or stop. Contact us for detail.

9. Storage

Observe the following requirements for the storage.

1. Cover the inlet and outlet for keeping away foreign matters.

2. The pump should be stored indoors, free from exposure to water and high humidity.

3. Drain liquid out of the pump unit completely for storage after operation. Clean and inspect the pump

unit as necessary.

* See manufacturer's instruction manual for the motor unit and coupling.

10. ON-OFF operation

Turning on/off power frequently, the pump is damaged. Keep the number of ON-OFF operations at or

below six times per hour.

11. Centring (Coupling)

Conduct centring after mounting/dismounting the pump or motor unit. See page 30 for centring. See man-

ufacturer's instruction manual to conduct centring by yourself.

Outline

- 14 -

Installation

1. Before installation

...............................

15

2. Pipework

.............................................

16

3. Wiring

.................................................

19