IWAKI WALCHEM MX-70 User manual

IWAKI WALCHEM
MAGNETIC DRIVE PUMP
MX-70 & (F)100 SERIES

Contents
Item Page
1 Unpacking and Inspection.............................................................................................1
2 Identification .................................................................................................................1
3 Specifications................................................................................................................2
4 Handling........................................................................................................................2
5 Installation and Operation.............................................................................................3
6 Assembly.......................................................................................................................4
7 Maintenance and Inspection.......................................................................................... 5
8 Parts Description and Exploded View ..........................................................................6
9 External Dimensions and Weight .................................................................................7
P/N 180243 Rev. A July 2003
Thank you for having selected an Iwaki Walchem MX-70/100 Series magnetic drive pump.
This instruction manual deals with the correct handling, maintenance, inspection and
troubleshooting procedures for the MX magnetic drive pump. Please read through it carefully
to ensure the optimum performance, safety and long service of your pump.

1
1 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.
2 OPERATING PRINCIPLE
The centrifugal pump is driven by pair of magnets which are incorporated in the
impeller and motor shaft. The sealless pump structure eliminates shaft seals such as
conventional mechanical seals because the pump chamber is shielded by the casings
and the impeller is operated by the magnets. The combined coupling torque of the drive
magnet and impeller magnet gives sufficient driving power against the motor torque.
Drive Magnet
Impeller
Spindle
Driven Magnet
Discharge
Suction

2
3 MODEL IDENTIFICATION GUIDE
1 2 3 4 5 6
1. Series name
MX: GFRPP casing material
MX-F: CFRETFE casing material
2. Pump Size code
70: Not available for MX-F models
100: Available for MX and MX-F models
3. Wet end material
MX: V: FKM O-ring E: EPDM O-ring
MX-F: RV: PTFE bearing KV: SiC bearing
FKM O-ring FKM O-ring
4. Suction/Discharge Port Connections
Blank: Hose connection (available for MX (GFRPP) only)
T: Threaded connection
5. Impeller Code
MX: No code
MX-F: Y for 50/60 Hz
Z for 60 Hz only
6. Motor voltage code
Blank: 1 phase 100V
L: UL Listed
MX-F 100 V T Y L
-

3
3 SPECIFICATIONS
Model Suct x Disch Specific
Gravity Limit
Max.
Discharge
Pressure (ft)
BEP (Q-H) Max Flow
(GPM)
Motor
output
@50/60 Hz
MX-70 1” x 1” 1.0 26.2/36.1 13-25 23.8/26.4 150/180W
MX-100 1” x 1” 1.2 27.6/38.4 19-29 29/33 210/260W
MX-F100Y 1” x 1” 1.9/1.6 26.9/37.7 18-29 29/33 210/260W
MX-F100Z 1” x 1” - /2.3 - / 26.9 16-20 - / 29 -/260W
Notes:
1. Fluid temperature range: 32-176°F (0-80°C)
2. Limit of specific gravity at maximum flow when fluid viscosity is 1CP. Fluids with specific
gravities up to 2.3 can be handled with appropriate trimming of impeller. Consult factory for
recommended trim.
Rated Current/Starting Current
Rated Current (50/60Hz) Starting Current (50/60 Hz)
Power Source
Voltage MX-70 MX-(F)100 MX-70 MX(F)-100
110V (1 phase) 2.7A / 3.8A 4.0A / 4.0A 8.2A / 7.6A 8.8A /8.4A
220-240V (1 phase) 1.2A / 1.8A 1.58A / 1.83A 3.4A / 3.1A
3.6A / 3.3A
3.9A /3.7A
4.3A/ /3.9A
Sound Levels
Level of sound generated by the pump is shown in the table below.
Model Sound Level (dB)*
MX-70 70
MX-(F)100 75
*Measured from a distance of 1m.

4
MX-70 MX-(F)100
Material
No. Part Qty MX-70 MX-100 MX-F100RV MX-F100KV
1 Front casing 1 GFRPP CFRETFE
MX-70 Bearing 2 PPS --- --- ---
2 MX-100 Bearing A 1 --- Fluoroplastic SiC
3 Impeller 1 CFRPP CFRETFE
4 O-ring 1 FKM, EPDM FKM
5 MX-100 Bearing B 1 --- Fluoroplastic SiC
7 Shroud 1 CFRPP CFRETFE
8 Spindle 1 Ceramic High purity
ceramic SiC
9 Rear Casing 1 GFRPP CFRETFE
10 Drive magnet 1 Ferrite Magnet + Aluminum Alloy
11 Motor 1
12 Magnet housing 1 Cast Aluminum
MX-70 thrust 2 Ceramic --- --- ---
13
MX-100 front thrust 1 --- Ceramic High purity
ceramic- --
14 Hex soc. head screw 2 Steel
15 Hex head bolt 6 Stainless steel
16 Impeller thrust* 1 --- Ceramic High purity
ceramic SiC
17 Driven magnet 1
18 Mouth ring 1 --- Fluoroplastics ---
19 Retainer/Backup ring 1 --- Stainless steel
17 4 9
11 13 3
11 16 19 3 4 13
517 9
10
5

5
4 HANDLING INSTRUCTIONS
1. Do not operate the pump dry.
The sliding parts used in the MX-70/100 series pump are lubricated and cooled by the fluid being
pumped. Never operate the pump dry or with the valves on the suction side closed. Otherwise, the
inside of the pump will be damaged. If the pump is unavoidably or accidentally operated dry, with
no obvious damage, allow the pump to cool down for a minimum of one hour before attempting to
restart. Do not allow fluid to enter the pump cavity until the pump has cooled down. Sudden or
rapid cooling of the pump may cause damage to the bearing system. A dry run operation device is
recommended for the prevention of dry pump operation.
2. Starting
Prior to starting the pump, make sure that the power is turned off. Then carry out priming to fill the
pump cavity with liquid.
Next, close the valves on the discharge side. Now you can turn the power on and start up the pump.
When the pump has reached full speed and line pressure is stable, the discharge valves can be
opened to the desired settings.
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 which can cause severe damage to the pump.
4. Maximum system pressure rating is 31.0 PSI (2.2 kgf/cm2).
5. Influence of 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)

6
5 INSTALLATION AND OPERATION
■Installation
1. Secure the pump to floor or platform by bolting down the motor using all holes provided.
2. Check power source for proper voltage and phase. Attach the pump to a switched, hardwired
properly grounded circuit. Use appropriate wiring materials and abide by all local and national
electrical codes.
3. Connect the inlet and outlet fittings of the pump with appropriate size tubing or pipe connections.
A. For tubing connections use standard hose clamps to secure tubing. DO NOT OVER
TIGHTEN.
B. For pipe thread connections, use pipe tape to insure a good seal. DO NOT OVER TIGHTEN.
C. For convenient disconnection of pumps installed with rigid pipe, install unions near both inlet
and outlet connections.
■Operation
A. If the pump is to be left idle for extended periods, flush the pump with water to prevent
crystallization of the fluid inside the pump chamber.
B. If the fluid to be pumped contains suspended solids, install a strainer in the suction plumbing,
periodically inspect the suction strainer and remove any built-up debris.
C. Fluids of high specific gravity CANNOT be pumped. See pump specifications for more
information.
D. The impeller may decouple from the drive magnet for several reasons: e.g. temperature, viscosity or
specific gravity are too high. This is usually indicated by initial pumping, then a complete cut off of
flow. Turn off power to the motor, allow it to stop rotating, then start it again. If the problem
recurs, check for excess temperature, viscosity, or specific gravity.

7
6 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.
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 with flat and
spring washers.
7 MAINTENANCE AND INSPECTION
■Daily Inspection
1. Check that the pump operates smoothly, without generating abnormal sounds or vibration.
2. Check the level of the liquid in the suction tank, and the suction pressure.
3. Compare the discharge pressure and current measured during operation with the specifications
indicated on the motor and pump nameplates to verify normal pump load.
* Note that the indicated value of the pressure gauge varies in proportion to the specific gravity
of the liquid.
* Note that the valve of the pressure gauge or vacuum gauge should be opened only when
measurements are recorded. It must be closed after completion of each measurement. If the
valve remains open during operation, the gauge mechanism may be affected by abnormal
pressure caused by water hammer.

8
8 PARTS DESCRIPTION AND EXPLODED VIEW
MX-70, MX-100, MX-F100
15
1
4
3
9
19
10
11
2
Item
No. Description Qty Item No. Description Qty
1 Front casing 1 10 Drive magnet 1
2 Mouth ring 1 11 Motor 1
3 Impeller 1 15 Bolt, front casing 6
4 O-ring 1 19 Retainer/Backup ring* 1
9 Rear casing 1 * MX-100/MX-F100 only