IWAKI AMERICA MD SERIES User manual

IWAKI AMERICA
MAGNETIC DRIVE PUMP
MD/WMD SERIES

Contents
1SAFETY INSTRUCTION .................................................................................................................1
2UNPACKING AND INSPECTION...................................................................................................3
3OPERATING PRINCIPLE ................................................................................................................3
4MODEL IDENTIFICATION GUIDE................................................................................................4
5SPECIFICATIONS ............................................................................................................................5
Construction/Materials .......................................................................................................................6
6HANDLING INSTRUCTIONS .........................................................................................................7
7INSTALLATION, PIPING, AND WIRING......................................................................................8
7.1 Installation...............................................................................................................................8
7.2 Piping instructions..................................................................................................................9
7.3 Wiring......................................................................................................................................9
8 ASSEMBLY...................................................................................................................................11
9OPERATION ...................................................................................................................................12
10 MAINTENANCE/INSPECTION AND CONSUMABLE PARTS ...............................................14
11 PARTS DESCRIPTION AND EXPLODED VIEW......................................................................14
12 DIMENSIONS................................................................................................................................15
13 TROUBLESHOOTING..................................................................................................................16
P/N 180243 Rev. E Aug 2012
Thank you for having selected an Iwaki America MD/WMD Series magnetic drive pump. This
instruction manual deals with the correct handling, maintenance, inspection and troubleshooting
procedures for the MD/WMD magnetic drive pump. Please read through it carefully to ensure the
optimum performance, safety and long service of your pump.

1
1 SAFETY INSTRUCTIONS
Turn off the power supply
Working without disconnecting the power supply may cause an electrical shock. Before performing
any assembly or maintenance procedures involving the pump, make sure to turn the power supply
switch off and to stop the pump and other related devices.
Terminate operation
When you detect any signs of abnormal operation, terminate pump operation immediately.
For specified application only
The use of a pump in any applications other than those clearly specified may result in injury or damage
to the pump. Use the pump strictly in accordance with the pump specifications and application
capabilities.
Modification
Never modify the pump. Iwaki America will not be responsible for any accident or damage of any kind
caused by the user remodeling the pump without first obtaining permission or instructions from Iwaki
America.
Protective clothing
If application involves the handling of hazardous liquids, protective gear (gloves, glasses, clothing, etc)
must be worn before performing any maintenance on the pump. Please follow safety guidelines
established for such applications.
Operation
Operation of the pump and related system must be by experienced or knowledgeable personal. The
pump operator or pump operation supervisor must not allow any personal who have little or no
knowledge of the pump to operate the unit.
Power
Do not operate the pump at a different voltage than specified on the nameplate. This may result in
damage to the unit or fire. Only the specified voltage must be used.
Do not submerge
If the motor or power cable becomes wet or damp fire or electric shock may occur. The unit should be
installed in such a manner to prevent contact with fluids or in a wet environment. Follow all local,
state and government regulations for the installation and wiring of the pump.
Spill accident
Protective measures should be taken against any accidental spill or leakage of any hazardous liquids as
a result of unexpected damage to the pump or the related piping. Please follow safety guidelines
established for such occurrences.
Operating site must be free of water and humidity
The pump is not designed to be water-proof or dust-proof. The use of the pump in places with
splashing water or humidity above 90% may result in an electrical shock or short circuit.

2
Do not damage power cord
Do not cut, abrade or forcibly pull the power cord. Excessive heat or heavy load applied to the cable
may damage the cable and finally result in a fire or an electrical shock.
Do not cover the motor
Covering the motor during operation may result in an accumulation heat inside the motor and cause a
fire or a mechanical failure. Proper ventilation is necessary for the motor.
Grounding
Do not operate the pump without proper grounding; otherwise an electrical shock may result. Follow
all local, state and government regulations for the installation and wiring of the pump.
Power cord cannot be replaced
Never use a damaged power cable; otherwise, a fire or an electrical shock may result. Handle the power
cord carefully, as it cannot to be replaced by a new cable. (The complete motor must be replaced if
damaged).
Location and storage
Do not install or store the pump in the following places:
* Places where a flammable gas or material is used or stored.
* Places where the ambient temperature is extremely high (104°F or higher) or extremely low
(32°F or lower).
Static Electricity Hazard
When low electric conductivity liquid such as ultra-pure water is handled, static electricity may be
generated in the pump, which may cause static discharge and damage the pump. Take appropriate
countermeasures to avoid and remove any potential static electricity.

3
2 UNPACKING AND INSPECTION
Open the package and check that the product
conforms to your order. Also, check each of the
following points. For any problem or
inconsistency, contact your distributor at once.
1. Check that the model number indicated on the
nameplate conforms to the specifications of
your order.
2. Check that all the accessories you ordered are
included.
3. Check that the pump body and parts have not
been accidentally damaged or that any bolts
have not been loosened in transit.
3 OPERATING PRINCIPLE
A sealless magnet drive pump uses magnet torque to transmit energy from the motor to the impeller. A
magnet coupling is formed using an inner, or driven magnet, attached to the impeller and an outer, or
drive magnet, attached to the motor shaft. This design eliminates mechanical shaft seals or packing,
since there is no direct connection between the motor shaft and the impeller. The front and rear
casings, sealed with a static o-ring, form the pump or liquid end. The magnetic field is transmitted
from the drive magnet through the rear casing to the driven magnet that is attached to the impeller. The
combined coupling torque of the drive magnet and impeller magnet provides the driving power to the
fluid being pumped.
IWAKI
MAG DRIVE PUMP
MODEL
MAX. CAPACITY GAL/MIN
MAX.HEAD FT.
VOLTAGE AMPS
SERIAL NO.
IWAKI AMERICA
5 BOYNTON ROAD HOPPING BROOK PARK
HOLLISTON, MA 01746 USA
TEL: [phone] www.iwakiamerica.com
Drive Magnet
Impeller
Spindle
Driven Magnet
Discharge
Suction

4
4 MODEL IDENTIFICATION GUIDE
1 2 3 4 5 6 7 8
1. Series name (WMD specifies US motor design)
2. Pump Size (6, 10, 15, 20, 30, 55, 70, 100)
3. R = Rotating Spindle (omit for MD-6 and MD-10)
4. L = UL Listed Motor, included in 6, 10, 55, 70, 100 115V model
(also on older 15/20/30/40 models)
5. Pump type
Blank: Standard Impeller
Z: High Head Impeller
X: High Flow Impeller
6. Suction/Discharge Port Connections
Blank: Hose Connection
T: Threaded Connection
7. Power source voltage:
115: 115V (50.60Hz) 230: 230V (50/60Hz)
220: 220/240V(50/60Hz)
8. NL = UL Listed 115V Motor (applies to 15, 20, 30, 40 sizes)
L
-
WMD/MD
115
NL
20
R
X(Z)
T
-

5
5 SPECIFICATIONS
Model
Connections
Motor
Output
(HP)
Motor
Speed
(RPM)
Current
(Amps)
Max
Flow
(GPM)
Max
Head
(Ft)
Max Sys.
Pressure
(PSI)
Specific
Gravity
Weight
(Lbs)
Hose
NPT
Polypropylene
MD-6
1/2
---
1/250
3100
0.25
2.3
4.5
2.80
1.2
1.8
MD-10
1/2
---
1/125
2900
0.40
3.1
6.8
4.30
1.1
1.6
MD-15R(T)
1/2
1/2
1/75
3100
0.29
5.0
11.1
7.20
1.3
3.5
WMD-15R(T)
1/2
1/2
1/38
3100
0.82
5.0
11.1
7.20
1.3
6.0
MD-20RT(T)
5/8
3/4
1/38
3100
0.48
8.2
14.1
9.95
1.1
4.4
WMD-20R(T)
5/8
3/4
1/38
3100
0.48
8.2
14.1
9.95
1.1
7.0
MD-20RX(T)
1
1
1/38
3100
0.50
13.7
8.2
5.69
1.3
4.4
WMD-20RX
1
1
1/38
3100
0.50
13.7
8.2
5.69
1.3
7.0
MD-20RZ
5/8
3/4
1/38
3100
0.53
2.9
22.6
14.22
1.1
4.4
WMD-20RZ
5/8
3/4
1/38
3100
0.53
2.9
22.6
14.22
1.1
7.0
MD-30R
3/4
3/4
1/16
3150
0.80
10.0
17.7
11.60
1.3
7.7
WMD-30R
3/4
3/4
1/16
3150
1.00
10.0
17.7
11.60
1.3
9.0
MD-30RX
1
1
1/16
3150
1.10
19.0
13.5
8.54
1.1
7.7
WMD-30RX
1
1
1/16
3150
1.00
19.0
13.5
8.54
1.1
9.0
MD-30RZ
5/8
3/4
1/16
3150
1.10
4.5
36.1
24.18
1.0
7.7
WMD-30RZ
5/8
3/4
1/16
3150
1.00
4.5
36.1
24.20
1.0
9.0
MD-40R
3/4
3/4
1/12
3200
1.30
13.7
21.3
14.22
1.1
8.6
WMD-40R
3/4
3/4
1/12
3200
1.90
13.7
21.3
14.22
1.1
10.0
MD-40RX
1
1
1/12
3200
1.20
22.4
15.4
9.95
1.1
8.6
WMD-40RX
1
1
1/12
3200
1.90
22.4
15.4
9.95
1.1
10.0
MD-55R
1
1
1/8
3400
1.60
18.4
26.9
17.06
1.2
10.1
MD-70R
1
1
1/4
3400
2.80
25.6
31.8
21.33
1.0
13.2
MD-70RZ
3/4
3/4
2/7
3400
3.80
11.4
66.6
42.70
1.0
13.2
MD-100R
1
1
1/3
3300
3.40
35.6
39.0
25.60
1.2
18.7
WMD-100R
1
1
1/3
3400
*
35.6
39.0
25.60
1.2
*
Fluoroplastic
WMD-30FX
---
1/2
1/16
3200
0.9
3.2
35.2
17.0
1.3 (1.5)
9
WMD-30FY
---
1/2
1/16
3200
0.9
3.2
26.0
17.0
1.5 (1.8)
9
WMD-30FZ
---
1/2
1/16
3200
0.9
2.6
24.0
21.3
1.9 (2.1)
9
MD-55Y
---
1
1/8
3300
1.9
17.1
25.6
21.3
1.3 (1.5)
11.9
MD-55Z
---
1
1/8
3300
1.6
13.0
19.0
21.3
2.0 (2.2)
11.9
WMD-100FY
---
1
1/3
3450
*
36.0
38.0
31.2
1.3 (1.6)
*
MD-100FY
---
1
1/3
3300
3.4
35.7
37.7
31.2
1.3 (1.6)
18.7
WMD-100FZ
---
1
1/3
3450
*
28.0
27.2
31.2
1.9 (2.2)
*
MD-100FZ
---
1
1/3
3300
3.4
28.0
27.2
31.2
1.9 (2.2)
18.7
Notes:
1. Pump performance data is based on pumping clean water at ambient temperature.
2. The maximum flow rate is at 0 discharge head.
3. Maximum viscosity of liquid: 1.0 cP (for a specific gravity of 1.0)
4. Permissible liquid temperature: 32-176°F (0 –80°C). Note, permissible temperature range may differ depending
upon the type of liquid and operating conditions.)
5. The maximum specific gravity of the liquid is the value at max. flow rate. The value varies depending on the flow
rate, ambient temperature, viscosity of liquid, etc.
6. Motor: Single-phase capacitor-run induction motor or 3-phase induction motor.
* Built-in thermal protector
A thermal protector is built in the motor. The protector automatically stops motor operation when the motor is
overheated. (The motor starts again when the temperature falls to normal.)

6
Typical Construction/Materials
No.
Part Name
Qty
Material
1
Front Casing
1
GFRPP (Note 1)
2
Rear Casing
1
3
Impeller
1
4
Thrust
2
Alumina Ceramic
5
O-ring
1
FKM or EPDM (Note 2)
6
Screw
4~6
Stainless steel
7
Bearing
2
Fluororesin containing
filler material (Note 3)
8
Spindle
1
Alumina ceramic
9
Motor
1
Note 1: The material of the impeller used in MD-70RZ, 100R, 100R-5 is CFRPP.
Note 2: More elastomer options available
Note 3: The material of the bearing used in (W)MD-20RZ, 30RZ, and MD-70RZ is PPS.

7
6 HANDLING INSTRUCTIONS
1. Handle the pump carefully
Strong impact to the pump assembly may result in damage or reduced performance.
2. Starting
Before priming the pump be sure the power is turned off then proceed with filling the pump
end with water. Note, the pump must be fully primed before starting.
Next close the valve on the outlet or discharge side of pump. Turn on power to the pump,
when full speed is reached gradually open the discharge vale until specified flow rate is
achieved.
Caution
Operating the pump dry (without liquid) may cause severe damage.
3. Stopping
When stopping the pump, first close the discharge valve gradually. When it is completely
closed, turn off the power switch so that the pump stops. Never stop the pump suddenly by
quickly closing a valve (i.e., solenoid or hydraulic valves).
Caution
Quick valve closure may cause water hammer that can cause severe damage to
the pump.
4. Temperature
The pump itself may not suffer a change in performance due to temperature fluctuation.
However, the liquid may change in terms of viscosity, vapor pressure, and corrosive properties.
Pay special attention to changes in liquid characteristics as a result of temperature fluctuation.
Liquid temperature range: 32 –176°F (0 –80°C)
Ambient temperature range: 32 –104°F (0 –40°C)
5. As there is a powerful magnet inside the pump unit, do not use any liquid that contains metallic
substances such as iron, nickel, etc.
6. Do not operate the pump in the following places:
Places exposed to rain and/or wind.
Places where the temperature falls below 32°F (0°C).
Places where corrosive gas (such as chlorine) is present.
Places exposed to splashing of water or fluid being pumped.
Places where the ambient temperature is 104°F (40°C) or above.
Places where explosive or combustible materials/gases are present.
7. Do not operate the pump with the following liquids:

8
For the compatibility to chemical liquid or any special liquid, contact an Iwaki
America sales representative.
Liquids that significantly swell polypropylene.
Paraffinic hydrocarbons such as gasoline and kerosene.
Halogenated hydrocarbons such as trichloroethylene and carbon tetrachloride.
Ether and low-grade ester
Slurry
(For a chemical compatibility to guide contact Iwaki America customer service.)
8. To prevent fire and explosions, do not place dangerous or flammable substances near the
pump.
9. Be sure unit is properly ground.
10. If a pumped is damaged, it can be dangerous to operate. Contact factory for assistance.
11. Avoid direct physical contact with the motor or pump during operation, as surface temperatures
may be extremely high due to operating conditions.
7 INSTALLATION, WIRING AND CONNECTIONS
7.1 Installation
1. Installation site
Installation site must have an ambient temperature of 32-104°F (0-40°C) and a relative
humidity lower than 90%. Install the pump where maintenance and inspection work can be
done easily.
2. Pump installation method
This pump is not self-priming. It is recommended that the pump shall be installed in a
position lower than the liquid level of the suction tank by at least 12 inches (30 cm). If this
distance is too short, air may enter the pump, causing damage.
3. Direction of pump discharge port
The discharge port can be directed as desired. However, for efficient elimination of air in
the pump end, it is recommended that the discharge port be positioned in the horizontal
direction.
4. Anchoring of base
The base of the pump must be anchored firmly. The pump must not be mounted in a
vertical position.

9
7.2 Piping instructions
1. To minimize frictional resistance, the shortest piping possible with a minimum number of
bends should be utilized on the inlet or suction side of the pump.
2. Use a corrosion-resistant vinyl hose that is rated at or above the pressure rating of the
pump (see specification table).
3. Hose size (for hose-barb style pumps)
Select hose size in accordance with the diameter of the pump connections. As the hose
tends to be crushed under the force, the use of a braided reinforced hose is recommended.
Note, if the connection on the suction side is loose air may be mixed in with pumped fluid.
(In the case of high temperature liquids, special attention must be paid to the selection
of a hose.)
4. Hose connection
Be sure to cut the ends of the hose straight. Press the hose end firmly against the discharge
or suction port until it reaches the bottom of the port. Use a fastener (such as a hose clamp)
to make the connection tight and leak free.
Caution
Do not over tighten the connection ports (suction and discharge) excessively as
they are made of plastic resin and are could be damaged.
5. Valve installation
Install valves close to the suction and discharge ports.
Suction side valve:
For easy liquid removal and pump maintenance
Discharge side valve:
For adjustment of the discharge rate or head and for easy removal and pump
maintenance.
7.3 Wiring
1. Prior to wiring the pump, confirm the voltage indicated on the nameplate is correct for
your installation. (Observe all local and national regulations regarding electrical work.)
The connection diagram is presented on the next page.
2. The pump does not have an external switch. It starts when power is supplied to the pump
wires.

10
BROWN
BLUE
GREEN/YELLOW
THERMAL PROTECTOR
CAPACITOR
MAIN COIL
POWER
SOURCE
THERMAL PROTECTOR AUXILIARY COIL
MAIN COIL
CAPACITOR
POWER
SOURCE
BLACK
WHITE
GREEN
THERMAL PROTECTOR
AUXILIARY COIL MAIN COIL
CAPACITOR
POWER
SOURCE
BLACK
WHITE
GREEN
Wiring diagrams
• (W)MD-15R, 20R, 20RX, 20RZ, 30R, 30RX and 30RZ (Single-phase capacitor run motor with
thermal protector)
• (W)MD-40R, 40RX, 40RZ, 55R, 70R, 70RZ, and 100R (Single-phase capacitor run motor with
thermal protector)
• MD-70R, 70RZ, and 100R models (3-phase motor, 220/380V)
THERMAL PROTECTOR
THERMAL PROTECTOR
ROTOR
POWER
SOURCE
RED WHITE BLACK
GRAY BLUE YELLOW
W2 U2 V2
U1 V1 W1
THERMAL PROTECTOR
THERMAL PROTECTOR
POWER
SOURCE
RED WHITE BLACK
GRAY BLUE YELLOW
W2 U2 V2
U1 V1 W1
220V
380V
100R ONLY

11
• (W)MD-70R, 70RZ, and 100R models (3-phase motor,400/440V)
8 ASSEMBLY
1. Place the motor on end vertically so that the shaft is pointed upward.
2. Install the drive magnet on the motor shaft and position the shaft flush with the inside of the
magnet. Note: On WMD models, screw the bracket to the motor first.
3. Insert the rear casing into the magnet/motor bracket.
4. Install the impeller and O-ring into the rear casing.
5. Place the front casing over the pump, making sure that the volute casing is aligned.
6. Using a hex head driver, fasten the liquid end to the bracket using six screws. Tighten in a star
pattern.
THERMAL PROTECTOR
THERMAL PROTECTOR
ROTOR
POWER
SOURCE

12
9 OPERATION
Caution
• Before operating the pump, confirm that connections to the discharge and suction ports are
secure.
• Dry run operation (operation without liquid in the pump) damages the pump. Be sure to fill the
pump with liquid prior to startup.
• Do not operate the pump with closed, or almost entirely closed, suction and/or discharge side
valve(s). A closed suction valve will cause dry-run operation.
• Do not open or close the suction or discharge side valve suddenly, this may result in
decoupling and damage to the pump end. (Under such circumstances, turn off the power supply
immediately. When the motor stops rotating, the magnetic coupling will be reconnect
automatically.)
No.
Operation Step
Note
1
Check piping, wiring
and voltage.
Check connections to confirm they are secure and leak-free. Check
the power supply voltage by referring to the information on the
nameplate.
2
Open and close
valves.
Fully open suction side valve.
Fully close discharge side valve.
3
Check that pump
chamber is filled with
liquid.
Fill pump chamber with priming liquid.
Be sure suction line is completely filled, this is especially
important if pump is above liquid level.
4
Supply power to
pump
After steps 1 to 3 above, connect power supply to start pump.
5
Adjust discharge
capacity & head to
desired values.
Adjust discharge side valve gradually till desired discharge
capacity and head are obtained. Do not open or close valves
suddenly.
Note: Do not keep discharge side valve closed for more than 1
minute.
Note: Check that pump is operating normally. If not, turn off
power immediately and eliminate cause referring to 'Causes of
Trouble and Troubleshooting' section (p.27).
6
Checkpoints during
operation
Be careful to prevent solids from entering the pump. Solids in the
pump may cause impeller to be locked stopping liquid circulation.
The motor continues to rotate even if impeller is locked. In such a
case, turn off power supply at once.

13
Pump Stopping Procedure
No.
Stopping Step
Description
1
Close discharge side valve.
Close discharge side valve gradually.
Do not use electromagnetic valve for quick closing.
2
Switch power off.
Check that motor stops smoothly after power supply is
disconnected. If not, pump should be inspected. (For details,
contact Iwaki or your dealer.)
How to store pump when it is out of use for a long time
Remove the liquid from the pump if it is to be stored for a long period of time. In addition, run it with
water for about 5 minutes every 3 months to prevent rust on the motor bearing.
Warning
• Before draining the pump, turn off the power supply.
• Be sure to wear proper safety gear (gloves, protective shoes, etc.) when handling pump end for
draining purposes, especially when a hazardous chemical is being pumped.
Caution
Note that residual liquid may run from the discharge and suction ports when the housing is
removed. Do not allow any electric parts to come in contact with the liquid.
Never discharge hazardous or chemical liquid over the ground or floor in the plant. Instead, use a
draining pan (or container). Observe each applicable local law or regulation for the handling or
disposal of hazardous liquids.
Draining procedure
1. Turn off the power supply. (Make sure no other operator will turn the power supply on
accidentally.)
2. Close the discharge and suction sides valves fully.
3. Remove the hoses piping attached to the pump.
4. Remove the screws on the pump base to detach the pump from its mounting location.
5. Rotate the pump.
6. Discharge hazardous liquids appropriately.

14
1234
5
6
9
7
10 MAINTENANCE/INSPECTION
Maintenance and inspection
• When the pump has been used for a long time, the front casing screws attaching the pump head
to the motor bracket may loosen. Tighten screws periodically taking care not to deform the
plastic parts. Also, after pump has been stored for a long time, tighten screws before pump is
used again.
• Daily inspection
Check operating conditions (vibration, noise) as well as electric current value and pump
discharge capacity. As soon as you find any abnormality, turn off power and refer to
“Troubleshooting” on page 27.
11 PARTS DESCRIPTION AND EXPLODED VIEW
Item
No.
Description
Item
No.
Description
1
Screw
5
Rear Casing
2
Front Casing
6
Drive Magnet
3
O-Ring
7
Motor Assembly
4
Impeller
8
Retainer
(MD-100R,100F,55F only)
9
Bracket
TYPICAL MD-6 through 40
TYPICAL MD-55/70/100
TYPICAL WMD

15
12 DIMENSIONS
Dimensions in inches
*Varies with motor
Connections
W
H
L
a
b
c
d
e
f
Model
Hose
NPT(M)
Polypropylene Models (MD-115V models only)
MD-6/10
1/2
---
2.91
3.62
4.09
1.18
2.87
2.36
1.77
1.22
0.67
WMD-15R(T)
1/2
1/2
3.50
4.26
9.46
2.37
4.15
2.50
1.94
1.52
0.85
MD-15R(T)
1/2
1/2
3.74
4.39
7.05
1.97
4.59
3.35
2.17
1.52
0.85
WMD-20R(T)
5/8
3/4
3.50
4.35
9.70
2.37
4.39
2.50
1.94
1.30
1.12
MD-20R(T)
5/8
3/4
4.17
4.19
7.99
1.73
4.06
3.54
1.77
1.30
1.12
WMD-20RX(T)
1
1
3.50
4.95
10.37
2.37
5.06
2.50
1.94
1.83
40+
MD-20RX
1
1
4.17
4.75
8.66
1.73
4.45
3.54
1.74
1.83
40+
WMD-20RZ
5/8
3/4
3.50
4.70
9.98
2.37
4.67
2.50
1.94
1.56
1.52
MD-20RZ
5/8
3/4
4.17
4.92
8.31
1.73
4.17
3.54
2.17
1.56
1.52
WMD-30R
3/4
3/4
3.50
4.70
11.65
2.37
5.72
2.50
1.94
1.89
1.22
MD-30R
3/4
3/4
4.72
5.12
9.76
1.57
5.87
3.94
2.36
1.89
1.22
WMD-30RX
1
1
3.50
5.09
11.89
2.37
5.96
2.50
1.94
1.97
40+
MD-30RX
1
1
4.72
5.51
10.00
1.57
6.10
3.94
2.36
1.97
40+
WMD-30RZ
5/8
3/4
3.50
4.70
10.97
2.37
5.04
2.50
1.94
1.56
1.53
MD-30RZ
5/8
3/4
4.72
5.12
9.05
1.57
5.16
3.94
2.36
1.56
1.53
WMD-40R
3/4
3/4
4.38
4.84
11.34
3.09
6.66
3.37
2.08
1.89
1.22
MD-40R
3/4
3/4
4.72
5.12
9.85
1.57
5.87
3.94
2.36
1.89
1.22
WMD-40RX
1
1
4.38
5.23
11.30
3.09
7.02
3.37
2.08
1.97
43+
MD-40RX
1
1
4.72
5.51
10.08
1.57
6.10
3.94
2.36
1.97
43+
MD-55R
1
1
4.72
6.10
10.77
1.57
7.05
3.94
2.56
2.42
1.57
MD-70R
1
1
5.63
6.11
10.18
2.76
5.71
4.25
2.56
2.07
1.70
MD-70RZ
3/4
3/4
5.63
6.50
9.72
2.76
5.24
4.25
2.56
1.65
1.87
MD-100R
1
1
6.14
6.89
12.67
2.76
6.38
4.33
2.95
2.55
1.71
WMD-100R
1
1
*
7.44
*
3.00
10.43
4.87
3.50
2.55
1.71
Fluoroplastic Models (MD-115V models only)
WMD-30F (X,Y,Z)
---
1/2
3.50
5.02
11.82
2.37
6.67
2.62
2.29
1.84
1.22
MD-30F (X,Y,Z)
---
1/2
4.72
5.12
9.09
1.57
6.77
3.94
2.36
1.53
1.52
MD-55F (Y,Z)
---
1
4.72
6.11
10.53
1.57
6.61
3.94
2.56
2.30
1.56
WMD-100F (Y,Z)
---
1
*
6.80
*
3.00
12.05
4.88
3.56
2.55
1.71
MD-100 (Y,Z)
---
1
6.14
6.89
12.67
2.76
6.38
4.33
2.95
2.55
1.71

16
13 TROUBLESHOOTING
Pump
does not
start.
Pump is
not pumping
or flow is
insufficient.
Electric
current
is high.
Excessive
noise or
vibration.
Liquid
leaks.
Power is not supplied or wiring
is faulty.
○
○
Check power
connections or
contact your dealer.
Motor is out of order (short
coil or capacitor failure).
○
○
Contact your dealer.
There is residual air in the pump.
○
○
Eliminate air from
pump end completely.
Air is sucked in via suction port.
○
○
Check suction
connection.
Pump is running dry.
○
○
Supply priming water
to pump.
Specific gravity/viscosity of
liquid is too high.
○
○
○
Confirm application
with pump
specifications.
Periphery of impeller magnet is
in contact with rear casing.
○
○
○
○
Contact your dealer.
Impeller is damaged.
○
○
○
○
Contact your dealer.
Foreign matter is stuck to
impeller.
○
○
○
Contact your dealer.
O-ring is damaged.
○
Contact your dealer.
Loose front casing bolts.
○
○
Tighten bolts.
5 BOYNTON ROAD HOPPING BROOK PARK HOLLISTON, MA 01746 USA
TEL: [phone] FAX: [phone] www.iwakiwalchem.com