IWAKI AMERICA WMD-100 Series User manual

IWAKI AMERICA
MAGNETIC DRIVE PUMP
WMD-100 SERIES
INSTRUCTION MANUAL

Contents
Item Page
1Unpacking and Inspection.........................................................................................1
2Identification.............................................................................................................1
3Specifications............................................................................................................2
4Handling...................................................................................................................2
5Installation and Operation..........................................................................................3
6Assembly..................................................................................................................4
7Maintenance and Inspection......................................................................................5
8Parts Description and Exploded View........................................................................6
9External Dimensions and Weight...............................................................................7
P/N 180184.E 11/28/05
Thank you for having selected an Iwaki America WMD-100 Series magnetic drive pump. This
instruction manual deals with the correct handling, maintenance, inspection, and troubleshooting
procedures for the WMD-100 magnetic drive pump. Please read through it carefully to ensure
the optimum performance, safety and long service of your pump.

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1Unpacking and Inspection
MODEL
HEAD (FT.)
CAPACITY (GPM)
IMPELLER DIAMETER
HOLLISTON, MASSACHUSETTS
www.iwakiwalchem.com
Iwaki
Mag-Drive Pump
HP Hz. RPM
SERIAL NO.
DIRECTION OF ROTATION
DO NOT RUN PUMP DRY
WMD-100
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.
2Model Identification Guide
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WMD-100 R RT F
1. Series name
2. Materials of construction
RRT F
Materials Glass fiber reinforced polypropylene
(GFRPP) Carbon fiber reinforced fluoroplastic
Connections Hose 1" I.D. conn. 1" NPT male
Bearings Alumina Ceramic/Rulon Silicon Carbide
O-ring FKM (Viton)

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3Specifications
WMD-100R(T) WMD-100FY WMD-100FZ
Specific gravity limit 1.2 1.3* 1.9*
Max capacity gpm (L/min) 36 (136) 36 (136) 28 (106)
Max head ft (m) 41.5 (12.6) 38 (11.6) 27 (8)
Motor output hp (kw) 1/3 (.25)
Notes:
1. Fluid temperature range: 32-176°F (0-80°C)
2. *Limit of specific gravity at maximum flow when fluid viscosity is 1 CP. Specific gravity fluids up
to 2.2 can be handled with appropriate trimming of impeller. Consult factory for recommended trim.
4Handling Instructions
1. Do not operate the pump dry.
The sliding parts used in the WMD-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.

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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)
5Installation 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. Plug the pump powercord into a switched,
grounded outlet or hardwire into a 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.

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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.
6 Assembly
¦Liquid End Mounting Instructions (for pumps supplied without motor)
1. Place the motor on end vertically so that shaft
is pointed upward.
2. Apply Loctite (or equivalent) to the two set
screws on the drive magnet. Install drive
magnet on motor shaft and position face of drive
magnet 4.50 inches above the "C-Face" of the
motor. Align the drive magnet so that the
screws avoid the keyway of the shaft. Tighten
the two set screws of the magnet using a 3mm
allen wrench.
3. Place the pump adapter bracket on motor "C-
Face" mating the motor face to the bracket
recess. Position the bracket so that the drive magnet access hole is aligned with the motor base.
Fasten the bracket to motor using four 3/8 "-16 x 3/4" hex head socket bolts with 3/8" flat and lock
washers.
4. Insert impeller/magnet capsule into rear casing. Seat o-ring in groove of rear casing. Place front
casing over rear casing making sure that the o-ring is properly secured. Slide the retainer ring over
the outside of the rear casing until it seats properly in the flanged section of the rear casing. Align
the liquid end over the bracket so that the discharge port is pointed at 12:00 o'clock when viewed
from the suction port.
Using a hex head driver, fasten the liquid end to the bracket using six #10-24 screws, with flat and
spring washers, torque to 485 oz-in (35 kgf-cm).
4.50 ± 0.03 in
(114.3 ± .76 mm)

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¦Magnet Capsule/Impeller Installation (for WMD-100F pumps only)
1. The magnet capsule/impeller (wrapped in bubble pack) will be found in the same box that the pump
was shipped in. It was removed to protect the silicon carbide ceramic bearing components from
damage during shipment.
2. To install the magnet capsule/impeller, remove the six Phillips head screws on the front casing of
the pump. Be careful not to lose the small flat and lock washers.
3. Remove the front casing, noting its original orientation and install the magnet capsule/impeller into
the rear casing.
4. Install and align the front casing, ensuring that the o-ring is still seated properly, and retighten the
six screws. Be sure to utilize the flat and lock washers. Torque front casing bolts to 485 oz-in (35
kgf-cm).
7Maintenance 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 nameplate 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.

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8 Parts Description and Exploded View
Item No. Description Item No. Description
1Screw 5Rear casing
2Front casing 6Drive magnet
3O-ring7Adapter bracket
8Retainer
4Impeller
9Mouth ring*
* GFRPP version only
9
1
2
3
4
5
8
6
7

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9 Dimensions and Weights
WMD-100R
Pump end weight -6 lbs (2.7 kg)
Note: WMD-100RT & WMD-100FY/FZ
have 1" NPT-M suction and discharge ports.

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Notes:
1. Ref. Dimensions will vary with motor manufacturer. 2. Dimensions are in inches (mm). 3. Pump weight = 28 lbs (w/factory motor)

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5 BOYNTON ROAD HOPPING BROOK PARK HOLLISTON, MA 01746 USA
TEL: [phone] FAX: [phone] www.iwakiamerica.com