Sanwa Hydrotech MEK Series User manual

Machine Number Code MFG No.
INSTRUCTION MANUAL
Manual No.MEK01C(E)/1612ATEX
Original Instruction
Europe Edition
SANWA HYDROTECH CORPORATION
STAINLESS STEEL MAGNET DRIVE PUMP
SELF-PRIMING TURBINE PUMP
MEK
This instruction manual is for the person who actually operates the pump.
Please be sure this manual is provided to and understood by the operator on
the scene. If the instruction manual is also needed by personnel who install
the pump or by a staff of a plant constructor, please let us know. We will
supply another copy.
To the on-site operator: please enter the pump’s code and lot number above and for future
parts order and inquiry.
Requirements

1
Introduction
Thank you very much for selecting Sanwa Magnet Drive Pump. Our pumps
are manufactured under strict quality control standards to ensure that your
pump is in perfect operating condition. Improper handling or operation could
however inhibit the pump’s performance or lead to accidents. To use your
Sanwa Magnet Drive Pump in the manner for which it was designed, be sure
to closely follow the instructions contained herein. The instruction manual
should be kept in a safe place where it can be referred to whenever necessary.
For information concerning handling and operation of motor, refer to the
instruction manual for the motor.
Safety
Sanwa Hydrotech does not assume responsibility for damage or injury re-
sulting from failure to follow the safety instructions contained herein. Be
sure therefore to follow the instructions for safe and correct usage when op-
erating, performing maintenance, or inspecting the pump.
The degree of potential danger as a result of improper handling or operation
is indicated by the following three classications:
DANGER
Situation where improper handling or operation would almost certainly
result in death or serious bodily injury.
WARNING
Situation where improper handling or operation could result in death or
serious bodily injury.
ATTENTION
Situation where improper handling or operation could result in bodily
injury or equipment damage.
WARNING
WARNING
Situation where even normal handling or operation could result in
bodily injury by hot or cold liquid.

2
WARNING
Situation where improper handling or operation in hazardous location
could result ignition or explosion.
Items indicated by could also lead to serious consequences
according to the circumstances. Be sure therefore to strictly observe items
indicated by any of these labels.
DANGER
General
Do not use the pump in the presence of explosive gas or powder. You may
cause an injury or start a re.
Do not use the pump for pumping liquid with a low ash point or ignition
temperature.
Be sure to turn the power off before performing any type of maintenance,
repair or inspection. Failure to do so could result in electrical shock.
Use the material which is suitable to specification of liquid. Otherwise
leakage occurs.
Operation
Absolutely do not touch or come close to turning parts. Doing so could
result in injury caused by entanglement in the rotating parts.
In case of power failure, be sure to turn the power off to prevent the pump
from starting unexpectedly when the power is restored.
Maintenance and Inspection
Be sure to connect the power cable in accordance with instruction manual
for the motor and the connection diagram in the terminal box. Failure to
do so could result in electrical shock or re.
Magnet drives cause strong magnetic fields. Persons with a pacemaker
should not stay close to the magnet drive or come into close bodily contact
with parts of it.

3
WARNING
General
Do not insert your ngers or any other objects in the openings of the pump
motor. Doing so could result in electrical shock, injury or re.
Installation and Adjustment
Absolutely do not place inammable materials in the area surrounding the
pump. Doing so could result in re.
Operation
Be careful of rotating parts.
Do not insert your ngers, etc., in the openings of the frame adaptor while
the pump is operating. Touching turning parts could result in injury.
Disassembly and Assembly
Be careful with hazardous liquids.
If pumping dangerous chemicals, be sure to drain and wash well
before disassembling. A small amount of fluid may however remain
in the screw, faucet joint and engaged parts inside the pump.
If handling hazardous chemicals, be sure to wear protective equipment
such as safety glasses and rubber gloves, and proceed with caution while
disassembling the pump.
Be careful not to get your hands or ngers pinched by machine parts.
Parts may be strongly attracted by magnetism when disassembling or
assembling the magnet coupling. Be careful not to let your hands or
ngers get pinched by magnetized parts.

4
ATTENTION
General
Transport, installation, piping and wiring connections, operation,
adjustment, maintenance and inspection should be carried out by qualied
personnel. Having unqualied personnel perform these tasks could result
in electrical shock, injury or re.
Be sure to use only a power source of the voltage indicated on the name
plate of the motor. Not doing so could result in electrical shock, injury or
equipment damage.
Do not use a damaged motor. Doing so could result in injury or re.
The customer should not modify the pump under any circumstances. Doing
so could result in unexpected accidents. Sanwa Hydrotech shall not be
responsible for accidents or damage resulting from equipment modied by
the customer.
Do not block name plate or warning labels from view.
Do not remove the name plate or warning labels.
Transport
Beware of equipment falling or turning over during transport. Be sure
to use hanger bolt if the pump is equipped with one. After installation,
however, you should avoid hoisting the entire machine by the hanger bolt.
Before lifting, check the weight of the pump by referring to the catalog, etc.
Do not lift the pump which exceeds the rated weight of the hoist. Doing so
could result in injury or equipment damage caused by bolt damage, falling
or turning over.
The pump bearing is made of extremely rigid material, and cannot
endure rigorous vibration. The pump should be handled with care during
transport. The pump should also be handled with care when installing.
Unpacking
Check the top and bottom of the package before unpacking. Failure to do
so could result in injury.
Check the delivery specifications and name plate to make sure the
merchandise is as ordered. Installing wrong equipment could result in
injury or equipment damage.

5
ATTENTION
Piping and Wiring
Be sure to connect the power cable in accordance with instruction manual
for the motor and the connection diagram in the terminal box. Failure to
do so could result in electrical shock or re.
Do not forcibly bend, pull or crimp the power cable or motor lead wires.
Doing so could result in electrical shock.
Installation and Adjustment
Be sure to connect the earth terminal securely. Failure to do so could result
in electrical shock.
Operation
Do not operate with the terminal box cover off. After wiring, be sure to
replace the terminal box cover in its original position. Failure to do so
could result in electrical shock.
Beware of high temperatures.
If handling high temperature uids, do not place your hands, etc., near the
casing or frame adapter. Doing so could result in skin burning.
Do not operate the pump for pumping gases. This pump is designed for
pumping liquids. Otherwise, the pump may have a high temperature or
SiC bearings and the rear casing shell may be broken.
No-Load Operation
Absolutely do not operate the pump without a load. Doing so will cause
the inside to heat up and damage the bearings. Never operate the pump
without liquid inside of the pump. (This applies to when checking rotation
direction as well.) If heat is produced in the can, the temperature rises
may cause magnetism to reduce.
Shut-Off Operation
Do not perform shut-off operation for more than one minute. Doing so will
cause a radical rise in temperature of the liquid in the pump, and could
result in an accident.

6
WARNING WARNING
If the temperature of pumping liquid is very low, the casing, the rear
casing and the frame adapter would be very cold. So do not touch them.
Otherwise person will suffer an injury in a body.
If the temperature of pumping liquid is very high, the casing, the rear
casing and the frame adapter would be very hot. So do not touch them.
Otherwise person will suffer an injury in a body.
WARNING
General
The magnetic pump is designed for liquid only.
If the pump is modified or changed without authority and/or other than
original spare parts are used for repair works, the explosion protection will
be forfeited.
Inadmissible mode of operation
Driving motor must have approval for the use in areas subject to explosion
hazards.
Temperature limits
When being operated to its designated use, the pump’s maximum surface
temperature must not exceed the temperature category of the explosion
protection zone.
Speed limits
The maximum allowable speed is 1800rpm (MEK201,251) or 3600rpm
(MEK322,402). If the pump is operated with a speed exceeding the
maximum speed, explosion protection is no longer granted.
Prior to operating the pump unit with a frequency converter, it must be
checked, whether the driving motor is appropriate for that purpose.
Disassembly and Assembly
Ensure that the driving motor and/or the entire equipment have been
approved for the prevailing explosion protection zone.
Instruction given in the operation manuals of the driving motor is to be
observed.

7
If the pump is fitted with a heating jacket, the temperature of heating
medium must not exceed the maximum allowable surface temperature of
the pump.
Operation
When a pump is operated while not been completely filled, an ignition
source can develop due to heat input. The pump must be completely lled.
If cannot ensure that, appropriate monitoring must be taken.
When the pump is operated in the closed circuit system, the temperature
of liquid and the surface of the pump will be increased. Use the monitor to
prevent the pump from excessively heating up.
The situations below will increase the temperature of the pump surface.
Do not operate the pump under these situations.
•Shut-off operation •Low-ow operation •Dry run
•Operating with “decoupling”
Maintenance
If the clearance between rotating and stationary components is out of
limitation, it may happen that these component contact and resulting
frictional heat entail excessive temperatures.
Ensure that bypass-hole of casing and shaft is not interrupted.
Ensure that pump parts are not corroded. If corrosion occurred, examine
the change of material. Give priority to experience on selection of material.
To Prevent sparks
To avoid the potential hazards from random induced current generating a
spark, the earth contact on the pump and motor must be used.
To avoid electrostatic charge, do not rub non-metallic surfaces with a dry
cloth. Make sure the cloth is damp.

8
Unit Description
Units described in this instruction manual are as per the following table,
Category Unit abbereviation Unit description
Length
m Meter
µm Micrometer
mm Millimeter
Flow
m3/hr Cubic meter per hour
L/min Liter per a minute
Pressure MPaG Megapascal gauge
Temperature
°C Celsius
°F Fahrenheit
Speed rpm Rotation per minute
A-weighted sound
pressure level dB(A) Decibel
Power kW Kilowatt
Torque
N.m Newton meter
kgf.m Kilogram-force meter
Frequency Hz Hertz
Viscosity mPa.s Millipascal-second

9
Contents
Introduction for safety
Instructions for Safe Usage..............................................11
Equipment Failure / Accident Prevention and
Safe Operation Checks ...................................................................................11
Precautions When Pumping Special Liquids ....................................................12
A General Description of The Machinery ..........................................................12
A Description of The Intended Use of The Machinery .......................................12
Transport and Unpacking ...................................................13
1. Transport ......................................................................................................13
2. Unpacking ....................................................................................................13
Preliminary Check ..............................................................14
Pump Model Identication .................................................15
1. Pump Size ....................................................................................................15
Type (Pump Code) ..............................................................15
Pump Specication ............................................................16
1. Design Pressure ...........................................................................................16
2. Casing Piping Connection ............................................................................16
3. Viscosity .......................................................................................................16
4. Magnet Coupling ..........................................................................................16
5. Motor ............................................................................................................16
6. Parts Specications of Liquid Temperature Range .......................................17
7. Ambient Temperature ...................................................................................17
8. Speed Limit .................................................................................................17
9. Maximum and Minimum Flow Rate .............................................................17
10. Temperature Classication ........................................................................17
11. Marking .....................................................................................................18

10
Declaration of Conformity ..................................................19
Pump Installation ................................................................22
1. Installation ...................................................................................................22
2. Piping ...........................................................................................................23
3. Wiring ..........................................................................................................24
4. Earthing .......................................................................................................25
Operation ............................................................................26
1. Pre-Operation Inspections (Be sure to turn the power
off before performing inspections!) ...............................................................26
2. Operation .....................................................................................................26
Operation and handling ................................................................................26
3. Shutting Down ..............................................................................................27
Maintenance and Inspection ..............................................30
1. Routine Inspection ......................................................................................30
2. Conguration and Location of Part ...............................................................31
Parts .................................................................................................................................31
Conguration ....................................................................................................................32
3. Order of Disassembly and Assembly ............................................................33
4. Checking parts dimension ............................................................................36
5. Optimal Tightening Torque for Bolts and Nuts ...............................................37
Troubleshooting ..............................................................38
Repairs and Warranty .........................................................40

11
Instructions for Safe Usage
In order to use your Sanwa Magnet Drive Pump in the manner for which it
was designed, be sure to read through and get a thorough understanding
of the contents of this manual and the installation instructions before
attempting to install, operate, perform maintenance or inspections. You
should also have a good understanding of the equipment itself, matters
concerning safe operation and handling, and other matters requiring
attention before attempting to use the pump.
Equipment Failure / Accident Prevention and Safe Operation Checks
Pre-Operation Checks
The power source, wiring and connection, piping, priming, air purging and
rotation direction should be checked before starting operation.
Checks for Test Operation and Actual Operation
Current, voltage, suction pressure, discharge pressure, and discharge
flow rate should be checked when starting test or actual operation. The
pump should also be checked for vibration, abnormal noise and leaks when
operation is started.
DANGER
Be sure to take special precautions when performing test operation
checks if using hazardous, explosive or inammable liquids.

12
Precautions When Pumping Special Liquids
Sanwa pumps are used in various industries. Our stainless steel magnet
drive pumps in particular are frequently used for pumping hazardous,
explosive or inflammable liquids. Mishandling in any of these cases could
lead to serious consequences such as bodily injury, loss of life or property
damage. To prevent these from occurring, you should get a thorough
understanding of the information contained herein and use the pump in the
manner for which it was designed.
DANGER
Special care and safety equipment are required for the following types of
liquid:
Liquids which could produce a chemical reaction
Liquids which could produce germs liquids which are of a
dangerous nature
Liquids which could directly harm the human body
Preventative measures should be taken to protect special pumps and
pumps used in the main production line from natural disasters, unexpected
accidents or equipment failure, the event of which could have a disastrous
effect on your production. If these are impossible, you should keep a spare
pump on hand for emergency use. (A pump with a suitable motor unit will
be better.)
A General Description of The Machinery
This “MEK” pump is magnetically driven turbine pump. Impeller is rotated
in pump chamber by the magnetic coupling force to suck liquid from suction
port and to discharge outlet.
A Description of The Intended Use of The Machinery
This “MEK” pump cannot operate air, gases or solids. This pump is for liquid
only.

13
Transport and Unpacking
1. Transport
2. Unpacking
ATTENTION
When transporting the pump, be careful not to drop it or let it fall. Take
the appropriate method, such as picking up by two people or lifting by
belt, to avoid risk.
Make sure the eyebolts (if the pump is equipped with them) are used to
secure the pump during transportation. However, do not use the pump’s
eyebolts to lift a machine after the pump is mounted on it. In case of
no such eyebolt, sling around the pump frame adapter and the motor.
Before suspending the pump, refer to leaflet or drawings to check the
weight of the pump and the motor. Never lift a pump that exceeds the
rated load of your suspension device. If you fail to heed this advice, the
eyebolts may be distorted, and the pump may drop or fall, and this may
cause an injury or damage the pump.
The pump bearing is made of extremely rigid material, and cannot
endure rigorous vibration. The pump should be handled with care during
transport. The pump should also be handled with care when installing.
ATTENTION
Check the top and bottom of the package before unpacking. Failure to
do so could result in injury.
Check the delivery specifications and name plate to make sure the
merchandise is as ordered.
Installing the wrong equipment could result in injury or equipment
damage.

14
Preliminary Check
When your pump is delivered, you should check the following items:
Are all of the accessories included in the package?
ATTENTION
Check the name plate to make sure the merchandise is as ordered.
Check to make sure the pump has not been damaged or the bolts and
nuts not loosened during transport.
If you discover any accessories to be missing or you nd something wrong with
the merchandise, please contact your dealer or you may contact us directly.
Nameplate of pump
ATEX marking: See Page.17
TYPE: Pump Model and Pump Code.
(See next page)
DATE: Manufactured year and month.
IMP.DIA.: Diameter of impeller inside the pump.
PUMP MASS: The mass of pump. Not include motor.

15
Pump Model Identication
1. Pump Size and Motor
Motor “4Pole, 0.55kW(80) for MEK251” is available as an option.
In this case, the exclusive parts (frame adapter and magnet coupling (M))
are necessary.
Type (Pump Code)
MEK 201 - 6 TS KD 025
[1] [2] [3] [4] [5]
[1] Pump Model (See Page 14)
[2] Wet-end main Material
"6" : 316SS
[3] Material of Check valve
"TS" : PTFE + 316SS
[4] Material of Bearing(Bushing, Sleeve)
"KD" : SiC/SiC-D
[5] Motor Output
"025" : 0.25kW
"03" : 0.37kW
"15" : 1.5 kW
"22" : 2.2 kW
"30" : 3.0 kW
"40" : 4.0 kW
MODEL SUCTION (mm) DISCHARGE
(mm) MOTOR (FRAME)
201 20 20 4Pole , 0.25 kW (71)
251 25 25 4Pole , 0.37 kW (71)
322 32 32 2Pole , 1.5 kW (90)
2Pole , 2.2 kW (90)
402 40 40 2Pole , 3.0 kW (100)
2Pole , 4.0 kW (112)

16
Pump Specication
1. Design Pressure
2. Casing Piping Connection
Suction and Discharge : Rc threads (taper pipe threads JIS B 0203/ISO 7-1)
Drain, Priming inlet and Air vent :
Rc threads (taper pipe threads JIS B 0203/ISO 7-1)
3. Viscosity
30mPa•s (application base: 120 mPa•s)
Note: When viscosity is over 30mPa•s, please consult your distributer.
4. Magnet coupling
5. Motor
Motor “4Pole, 0.55kW(80) for MEK251” is available as an option.
In this case, the exclusive parts (frame adapter and magnet coupling (M))
are necessary.
PUMP SIZE DESIGN PRESSURE (MPaG)
MEK
201
1.0
251
322
402
PUMP SIZE MAGNET COUPLING
MEK
201 T-06-26
251 T-12-26
322 T-12-26
402 T-12-38
PUMP SIZE MOTOR
PUTPUT(kW) FRAME
MEK
201 0.25 71
251 0.37 71
322 1.5
2.2
90
90
402 3.0
4.0
100
112

17
6. Parts Specications of Liquid Temperature Range
Note: When temperature uctuates between extreme
high and low, please consult your distributer.
7. Ambient Temperature
Ambient temperature: min. -20 ~ max. 40 °C (-4 ~ max. 104°F)
8. Speed Limit
Operating speed: MEK 201,251 - max. 1800 rpm
MEK 322,402 - max. 3600 rpm
9. Minimum and Maximum Flow rate
Minimum Flow rate: see “data sheet”
Maximum Flow rate: 1.1 x Qopt
Qopt = Flow rate at Best Efciency Point
10. Temperature Classication
Refer to the following table for maximum allowable temperature of the
pumped liquid in accordance with the applicable temperature category.
The maximum surface temperature of the pump is the highest temperature
ascertained from any one of the following conditions:
1. the temperature of the liquid plus, 20℃ (68°F)
2. the temperature of the ambient temperature, plus 20℃(68°F)
Thus, the maximum liquid temperature for each temperature class is below.
In case of categories T5 or T6, contact us for further information.
Parts RANGE
-20~+120°C(-4~248°F)
SHAFT STANDARD MODEL
MAGNET COUPLING STANDARD MODEL
(MAGNET: Nd)
FRAME ADAPTER STANDARD MODEL
Temperature class Maximum temperature of liquid
T3 175°C (347°F)
T4 110°C (230°F)

18
11. Marking
An example of ATEX equipment marking is shown blow. The actual
classication of the pump will be engraved on the name plate.
For Gas atmosphere
II 2 G c IIC T3/T4
[1] [2] [3] [4] [5] [6]
[1] Equipment Group: II (non-mining)
[2] Category: 2
[3] Gas: G
[4] Protection measure: c construction safety
[5] Gas Group: IIC
[6] Temperature Class: (see above chapter 10) It depends on the temperature
of pump liquid and ambient temperature.
For Dust atmosphere
II 2 D c T ˚C
[1] [2] [3] [4] [5]
[1] Equipment Group: II (non-mining)
[2] Category: 2
[3] Dust: D
[4] Protection measure: c construction safety
[5] Maximum surface Temperature: (see above chapter 10) It depends on the
temperature of pump liquid and ambient temperature.

19
Declaration of Conformity