IWAKI AMERICA Sanwa MMP User manual

No. MMP01F(E)/1711
I.A. EDITION
Instruction Manual
This instruction manual has been prepared for the personnel who will use the pump,
so make sure it gets into the hands of the personnel in charge at the workplace
where it will be used. Please contact Sanwa Hydrotech if equipment manufacturers
or plant manufacturers would like copies to be provided.
IWAKI AMERICA, INC.
Five Boynton Avenue, Holliston, MA 01746 USA
Tel: [phone] / [email protected] / iwakiamerica.com
Note
Sanwa Stainless Steel Magnet Drive Pump
Model MMP

1
Foreword
Thank you for purchasing the Sanwa Magnet Drive Pump. Every effort has been
made in the manufacture of this product to ensure that it is safe for use. However,
improper handling may lead to unforeseen accidents or prevent satisfactory pump
performance from being achieved. Follow the instructions in this manual to ensure
proper use of the pump. This manual should be keep at hand so it can be referred
to when necessary.
For information on motor handling, please refer to the instruction manual for
the motor.
Important Safety Information
 To ensure safe and proper use of the pump, always observe the safety
precautions noted in this manual during pump operation, maintenance, or
inspection. Sanwa Hydrotech will not be responsible and not compensate for
injuries or accidents that result from failure to observe these precautions.
 This manual uses the three marks shown below to indicate the level of danger in
the event of improper pump handling.
Indicates imminent danger that will lead to death or
serious injury in the event of incorrect handling resulting
from failure to observe the indicated instruction.
Indicates a matter that may lead to death or serious
injury in the event of incorrect handling resulting from
failure to observe the indicated instruction.
Indicates a matter that may lead to injury or property
damage in the event of incorrect handling resulting from
failure to observe the indicated instruction.
Please note that serious consequences may result even in the case of matters in
, depending on the situation. All three marks indicate important
matters, so be sure to observe the instructions noted therein.

2
General
 Do not use this product in an explosive atmosphere, as this will lead to injury, fire, or other
adverse consequences. If the product must be used in an explosive atmosphere, use a
pump that allows a pressure-resistant explosion-proof motor or the like to be installed.
 When pumping liquids with a low flash ignition temperature or a low ignition temperature,
use an explosion-proof motor that is appropriate for that atmosphere.
 Do not use under hot line conditions. Always turn off the power before use. Failure to do so
may result in electric shock.
Operation
 Never touch or get near the rotating parts while the pump is operating. You may get caught
in the moving parts and injured.
 In the event of a power outage, be sure to disconnect the pump from the power source.
Failure to do so may result in injury when power is unexpectedly supplied again.
Maintenance and inspection
 Consult the connection diagram inside the terminal box or the instructions in the motor
instruction manual when connecting the power cable. Failure to do so may result in electric
shock or fire.
General
 Do not insert fingers or objects into the apertures on the pump and motor. Doing this may
result in electric shock, injury, fire, or other adverse consequences.
Installation and adjustment
 Never place flammable objects near the pump, as this may result in fire.
Operation
 Rotating part warning: Do not insert your fingers or the like into the frame adapter aperture
during operation, as you may be injured by coming in contact with rotating parts.

3
Disassembly and assembly
 Hazardous liquid caution: When the liquid being handled is a hazardous chemical, drain the
liquid and then clean the pump thoroughly before disassembly. Small quantities of liquid will
remain on the threads, spigot joint sections, and interface sections inside the pump.
Therefore, when handling chemicals that are hazardous to human health, be sure to wear
protective gear (safety goggles, rubber gloves, etc.) and be very careful during disassembly.
 Pinch warning: During disassembly or assembly of the magnet coupling, parts may be
strongly attracted by magnetic force. Make sure your fingers or hands do not get pinched
between these parts.
General
 Transport, installation, piping, wiring, operation, maintenance, and inspection processes
should be performed by persons with specialist knowledge. Performance by persons
without such knowledge may result in electric shock, injury, fire, or other adverse
consequences.
 Be sure to use a power supply with the voltage shown on the motor nameplate. Use of other
voltages may result in electric shock, injury, damage, or other adverse consequences.
 Do not attempt to use damaged motors, as this may result in injury, fire, or other adverse
consequences.
 Never attempt to modify the product yourself, as this may result in unforeseen accidents.
Such modifications are outside the scope of the warranty and Sanwa Hydrotech will not be
held responsible for the consequences.
 Make sure nameplates and warning labels are visible at all times. Do not place objects in
front of nameplates and warning labels.
 Do not remove nameplates or warning labels.
Shipment/transport
 Dangerous consequences may result if the pump should fall or topple during transport, so
transport the pump carefully. If the pump has an eyebolt, be sure to use it. However, after
the pump has been installed in the machinery, do not attempt to hoist the entire machine
with the eyebolt.
Before attempting to hoist the pump, check the weight of the pump in the catalog or other
reference, and do not attempt to hoist the pump if it is heavier than the load rating of the
hoisting gear. Attempting to do so may cause the bolt to break, resulting in injury or damage
of the pump due to its falling or toppling.

4
 The pump bearings are made of a very hard material, but they are susceptible to vibrations
and impacts, so handle them carefully during shipment and transport. Similarly, place the
pump gently when installing it in the machinery.
Unpacking
 Check to make sure the box is right side up before unpacking the pump. Failure to do so
may result in injury.
 Check the delivery specifications and the nameplate to make sure the product that has been
delivered is the one that was ordered. Installing the wrong pump may result in injury or
damage.
Piping/wiring
 Consult the connection diagram inside the terminal box or the instruction manual when
connecting the power cable. Failure to do so may result in electric shock or fire.
 Do not bend or pull the power cable or motor lead wires excessively, and make sure they
are not pinched, as this may result in electric shock.
Installation/adjustment
 Be sure to attach a ground wire securely to the ground terminal. Failure to do so may result
in electric shock.
Operation
 Do not operate the pump without the cover of the terminal box in place. Replace the terminal
box cover in its proper position after completing the electrical wiring work. Failure to do so
may result in electric shock.
 To prevent burns or frostbite, keep your hands away from the casing and frame adapter
when using the pump with extremely hot or extremely cold liquids.
 No-load operation
Never operate the pump in no-load status, as high temperatures that may damage the
bearings will be generated inside the pump. Always supply liquid when operating the pump.
(Also, be sure to supply liquid when confirming the direction of rotation.)
Operating the pump without a load will produce heat in the can part, and this may
demagnetize magnets.
 Shut-off operation
Do not perform the shut-off operation for more than one minute. Shut-off for longer than this
will cause the temperature of the liquid inside the pump to rise dramatically, possibly
resulting in accident.

5
Contents
Foreword
Important Safety Information
● Safety Checks and Precautions ............................................ 6
● Shipment, Transport and Unpacking ..................................... 7
1. Shipment and transport ................................................................. 7
2. Unpacking ...................................................................................... 7
● Before Use ............................................................................ 7
● Pump Models ........................................................................ 9
● Pump Model Codes ............................................................... 9
● Pump Specifications ............................................................ 10
● Pump Installation ................................................................. 12
1. Installation .................................................................................... 12
2. Piping ........................................................................................... 12
3. Electrical wiring ............................................................................ 13
● Operation ............................................................................. 14
1. Preliminary inspection .................................................................. 14
2. Operation ..................................................................................... 14
3. Shutdown ..................................................................................... 17
● Maintenance and Inspection ............................................... 18
1. Regular inspection ....................................................................... 18
2. Pump configuration and part names ............................................ 19
3. Disassembly and assembly order ................................................ 20
4. Part dimensions ........................................................................... 23
5. Optimal Tightening Torque for Bolts and Nuts ............................. 24
● Troubleshooting ................................................................... 25
● Repair and Warranty ........................................................... 27

6
●Safety Checks and Precautions
 Before use (installation, operation, maintenance, inspection, etc.), be sure to carefully read this
Instruction Manual and all associated documents, and follow the instructions to ensure proper
use. Make sure you have a thorough knowledge of the product and a thorough understanding
of all safety information and precautions before attempting to use the product.
Things to check to avoid equipment failure and accident as well as to ensure safe
operation
 Pre-operational check
Check the power supply, wiring/connections, piping status, priming and venting status, and
direction of rotation.
 Check prior to beginning a trial operation and actual operation
Check the current, voltage, suction pressure, discharge pressure, and discharge volume. Also,
check to make sure there is no abnormal vibration, noise, and leakage from any part of the unit.
 Do not forget to take special disaster prevention measures during the
trial operation check procedure when handling hazardous, explosive,
or flammable liquids.
Notes and precautions when the pump is used for special liquids
 Pumps are used in various industries. Stainless steel magnet drive pumps, in particular, are
often used for explosive or flammable liquids and liquids that are hazardous to human health.
Errors in the handling of pumps may result in serious harm to life or health and major property
damage. Be sure to read this Instruction Manual carefully to ensure proper operation for
preventing such harm and damage.
 Be sure to provide the necessary safety equipment and exercise proper
caution when using the pump for liquids such as the following:
- Explosive liquids
- Liquids that may cause chemical reactions
- Flammable liquids
- Liquids that are directly harmful to human health
 Accident prevention equipment should be provided for pumps installed in the main sections of
production lines and special pumps in order to guard against natural disasters, unexpected
accidents, failures, etc. and ensure that these events do not cause serious damage to
production operations. If such equipment cannot be installed, a spare pump (if possible, one
equipped with a motor or other drive unit) should be prepared so it can be used if necessary.

7
●Shipment, Transport and Unpacking
1. Shipment and transport
 Dangerous consequences may result if the pump should fall or topple
during transport, so transport the pump carefully. If the pump has an
eyebolt, be sure to use it. However, after the pump has been installed
in the machinery, do not attempt to hoist the entire machine with the
eyebolt.
Before attempting to hoist the pump, check the weight of the pump in
the catalog or other reference, and do not attempt to hoist the pump if
it is heavier than the load rating of the hoisting gear. Attempting to do
so may cause the bolt to break, resulting in injury or damage due to
falling or toppling.
 The pump bearings are made of a very hard material, but they are
susceptible to vibrations and impacts, so handle them carefully during
shipment and transport. Similarly, place the pump gently when
installing it in the machinery.
2. Unpacking
 Check to make sure the box is right side up before unpacking the
pump. Failure to do so may result in injury.
 Check the delivery specifications and the nameplate to make sure the
product that has been delivered is the one that was ordered. Injury,
damage, etc. may result if the wrong pump is installed.
●Before Use
As soon as the pump has been delivered, check the following points.
 To make sure that all accessories have been included, check the following:
 Check the nameplate to make sure the product that has been delivered
is the one that was ordered.
 Check to make sure the product has not been damaged during
shipment and that the bolts and nuts have not been loosened.
If the above checks reveal that accessories are missing or if there are any other problems, please
contact your dealer or the Sanwa Hydrotech.

8
TYPE: Pump model and pump code
DATE: Date of manufacture
IMP. DIA.: Impeller diameter
PUMP MASS: Weight of pump not including motor
Nameplate of pump

9
●Pump Models
M M P 11
1 2
Pump model Pump size
1. Operating temperature range
P: Standard model
Note: Please contact Sanwa Hydrotech if significant increases and decreases in
temperature occur repeatedly.
2. Pump size
Pump size Suction Discharge Motor frame
(NEMA)
11 1/2”
(15mm)
1/2”
(15mm)
56C
143TC,145TC
21 3/4”
(20 mm)
3/4”
(20 mm)
56C
143TC,145TC
22 1”
(25 mm)
3/4”
(20 mm)
56C
143TC,145TC
●Pump Model Codes (pump codes)
MMP22- 1 N 07 N N
① ②③④⑤⑥
① Pump model & size
Model：『MMP』
Size：『11』『21』『22』
② Impeller nominal diameter (UNIT：mm)
Pump Size Code Impeller Diamete
r
mm
(
inch
)
MMP11 『1』 93
(
3.66
)
MMP21 『1』 122 (4.80)
MMP22 『1』 84
(
3.31
)
Minimum
temperature
°F (℃)
Maximum
temperature
°F (℃)
Magnet
material
P −22 (−30) +302 (+150) Nd

10
③ Type of Motor
『N』：C-FACE NEMA motor
④ Motor output & Magnet Coupling Type
⑤ Pipe Connection & Pump Material
『N』：NPT & ACI-CF-8M(AISI316)
⑥ Temp Code
『N』：–4 – +248 °F (−20 –+120 ℃)
『H』：+249 – +302 °F (+121 –+150 ℃)
 (『H』istoapplyonlytoMMP21)
『L』：–22 – –5 °F (−30 – −21℃)
●Pump Specifications
1. Design pressure
2. Casing pipe connections
Suction and discharge： NPT Threads (National pipe thread taper ANSI B 1.20.1)
Drain： NPT Threads (National pipe thread taper ANSI B 1.20.1)
3. Viscosity
≦300mPa・s
4. Magnet coupling
PUMP SIZE MAGNET COUPLING
MMP 11 , 21 , 22 R25x6N
Code Output
(HP)
Magnet
Coupling
T
y
pe
Motor Frame Pump
Type &
Size
『03』 1/3
R25x6N 56C
MMP11,
MMP21,
MMP22
『05』 1/2
『07』 3/4
DESIGN PRESSURE(psig)
MMP
11 87
21 145
22 87

11
5. Motor
Rated output: NEMA motor：1/3HP , 1/2HP , 3/4HP
Frame: NEMA motor：56C
6. Part specifications
7. Ambient temperature
Ambient temperature：−4 – +104 °F (−20 – +40 ℃)
8. Speed of rotation
Maximum speed of rotation：3600 rpm
9. Flow rate for operation
Minimum flow rate for operation：(see individual data sheets)
Maximum flow rate for operation：1.1 times maximum efficiency flow rate
-22 - -5°F
(-30--21℃)
-4 – +248°F
(-20 - +120℃)
+249 - +302°F
(+121 - +150℃)
Gasket
or
O ring
MMP11 PTFE mixed with
glass fiber
or
VMQ
PTFE
MMP21 PTFE PTFE mixed with
glass fibe
r
MMP22PTFE
Frame
adapter
MMP11 ・Low temp. type
Frame adapter
・ Liquid Gasket
・Standard Frame adapte
r

MMP21
MMP22

12
●Pump Installation
1. Installation
1. Hoist the pump into position
2. Install the pump
 Determine the location for pump installation based on a study of the suction head.
 Install the pump in a location where maintenance and inspections can be performed
easily.
 Make sure the foundation has an area and volume large enough to accommodate the
weight of the pump and motor, and that it can adequately absorb vibrations. Fasten the
pump securely to the foundation using anchor bolts.
 Be sure to clean the suction water tank and suction pipes thoroughly before filling the
tank with liquid. Dirt and foreign matter in the tank and pipes may cause pump trouble.
 Before hoisting the pump, confirm the weight of the pump (including
the motor) and use ropes and hoisting gear that will support its weight.
Hoist the pump carefully to make sure it does not fall.
2. Piping
 Place the horizontal sections of the suction pipe so they rise gradually to the pump suction
port (gradient of 1/50 or more).
 Attach a foot valve or strainer to the ends of the suction pipe so foreign matter or the like
will not be sucked in.
 Attaching a gate valve to the suction pipe will facilitate disassembly and inspection when
the suction side is in flood suction and positive pressure status. Be sure to set the valve
to fully open during pump operation.
CAUTION
 Make sure that the pipes are properly supported. If the weight of the suction
and discharge pipes is applied to the pump, this may result in pump
misalignment and pump malfunction.
 The suction pipe should be as short as possible, with as few bends as
possible.
 Never use a suction pipe whose diameter is smaller than the pump bore.
 Make sure there are no protruding sections in the horizontal part of the suction
pipe, as air may collect in these locations during operation.
 Make sure that chips of threaded pipes and foreign matter do not enter inside
when pipin
g
.

13
3. Electrical wiring
 Install the power supply equipment for the motor and conduct the wiring
and groundwork, etc. properly in accordance with the technical
standards for electrical installation and indoor wiring regulations. It is
against the law for unqualified persons to conduct imperfect wiring or
groundwork. Furthermore, this would be extremely dangerous.
Therefore, under no circumstances should this be done. In addition,
installation of earth leakage breakers and overload protection
equipment is required by law in order to prevent electrical shock and
fire.
Gate Valve
Piping Support
Pressure Gauge
Compound
Pressure Gauge
Gate Valve
Piping Support
(Required for longer piping to reduce vibration)

14
●Operation
1. Preliminary inspection (be sure to turn off the power
beforehand)
1. Retighten the flange bolts and base bolts.
2. Clean the pipes and the inside of the tank thoroughly. Then fill the tank with water.
3. Using a thin rod or the like, turn the blades of the motor fan to make sure they turn
easily.
4. Purge all of the air from the pump.
In the case of positive pressure
Open the suction pipe and discharge pipe valves for the pump all the way. Purge all of
the air from the inside of the pump casing.
If the air inside the pump casing cannot be purged even when the discharge pipe valve
is opened all the way, attach an air bleed pipe to the discharge pipe and then purge
the air from the inside of the pump casing.
2. Operation
1. When priming is finished, close the discharge pipe valve and press the switch once or
twice to turn the unit on and off and check the direction of rotation (it should be clockwise
as viewed from the motor side) and the operational status to make sure there are no
problems.
If the motor is rotating in reverse, change the three-phase connection so the motor
turns in the right direction. (Check the direction of rotation using the arrow displayed
on the frame adapter and the motor fan’s direction of rotation.)
To start the pump, close the valve of the discharge pipe all the way. Make sure that the
discharge valve is closed before starting the pump.
If the pump liquid is at a low temperature (0°C or lower), turn the motor by hand just
before starting operation to make sure it turns easily. If it does not turn smoothly,
remove the motor and check to see if moisture has condensed or frozen in the rear
casing and the outer magnets.
2. When the specified speed of rotation has been reached, open the discharge valve within
one minute.
3. After starting the pump, check to make sure there is no abnormal noise and vibration as
well as increase in discharge pressure increases. After the pump has begun operating
at the specified r.p.m. and the value on the discharge pressure gauge has risen to the
shut-off pressure, gradually open the discharge valve until the specified discharge
pressure has been achieved.
CAUTION  Do not operate the pump for long periods of time with the discharge valve
closed. (Normally one minute or less is the limit.)

A
motor overload may occur if the discharge valve is opened too far. Monitor
the ammeter during operation to make sure overcurrent does not occur.

15
Operation and Handling Considerations
(Precautions for Operation)
 Never operate the pump in cavitation or no-load status, as this may damage the bearings. Shut
off the pump.
 If the magnet coupling slips, shut off the pump within one minute. Continuing to operate the
pump while the magnet coupling has slipped will demagnetize the magnet coupling and may
cause the pump to fail.
 When pumping a low-temp fluid with temperature =<+32°F(0℃), there causes a possibility of
frozen/condensate adhesion of outside air moisture to the pump. In such application, leave the
valve at frame adapter opened to be able to release collected water inside the frame adapter.
If the pump is not in use, discharge the low-temp fluid from the pump. Or else, by implementing
a bypass-piping. eic., keep the pump operated.
Corrective action: Installation of a no-load operation monitoring unit is
recommended.
 Do not insert your fingers or the like into the frame adapter aperture
during operation. You may be injured by coming in contact with
rotating parts.
 Precautions when using pump for extremely hot or extremely cold
liquids
To prevent burns or frostbite, keep your hands away from the casing
and frame adapter when using the pump with extremely hot or
extremely cold liquids.
 Prohibition of no-load operation
The bearings are self-lubricating using the pumped liquid. Therefore,
never operate the pump in no-load status. In the event that the pump
has been inadvertently operated in no-load status for several seconds,
wait at least one hour for the pump to cool before operating the pump
and supplying liquid. (This is to make sure that ceramic and other
materials that are susceptible to sudden cooling do not crack.)
 Prohibition of shut-off operation
Performing the shut-off operation for long periods of time will cause
the temperature inside the pump to rise, possibly resulting in
accidents.

16
Effect of temperature
The performance of the pump itself will not be affected by changes in temperature. However,
the specific gravity, viscosity, vapor pressure, corrosiveness, etc. of the liquids that are handled
will change along with changes in temperature. Therefore, it is necessary to be aware of
changes in the properties of the liquids that are handled.
Model Operating Temperature
Ran
g
e
MMP − 22 − + 302 °F
(−30 – +150℃)
Significant heat cycling (increases and decreases in temperature) may
cause leakage from the container seals.
Changes in performance due to specific gravity
The discharge pressure and power consumption will change when pumping the high specific
gravity liquid. Use a proper power unit (motor, inner magnet coupling, and outer magnet
coupling) for the high specific gravity liquid.
Changes in performance due to viscosity
When pumping highly viscous liquids, the discharge quantity and pump head will decrease as
compared to fresh water, while conversely the power requirements will increase. Use a proper
power unit for the power requirements.
Handling of slurry
The pump is designed to handle small quantities of slurry and sludge. However, before
pumping slurry, always determine the slurry quantity, particle size, etc. and consult the
manufacturer.
Changes in properties due to specific heat
The performance of the pump itself will not be affected by changes in temperature. However,
if the specific heat of the liquid being handled is low, the temperature inside the pump will rise
significantly. The specific gravity, viscosity, steam pressure, corrosiveness, etc. of the liquids
that are handled will change along with changes in temperature. Be very careful with changes
in the properties of the liquids being handled, particularly if the specific heat is low.
Be very careful with the temperature increase, as the temperature may rise significantly in
closed-loop circulating operation.

17
Noise level
The table below shows the noise level of each pump model.
The noise level will vary depending on the properties of the motor itself, the pump flow rate,
the piping design, the acoustic properties of the building, etc. In addition, the noise level may
increase when the inverter control is used to operate the motor.
2Px60Hz
dB
(
A
)
2Px50Hz
dB
(
A
)
MMP
11 66 66
21 68 68
22 68 68
(at a distance of 1 m from the motor)
3. Shutdown
1. Close the discharge valve.
2. Turn off the motor. Check to make sure that the motor slows down and stops smoothly.
(If it does not stop turning smoothly, conduct an inspection to see if there is a problem
inside the pump.)
3. In the event that a power outage occurs during pump operation, immediately disconnect
the pump from the power source and close the discharge gate valve.
4. When pumping a low-temp fluid and stop its operation, make sure to discharge the low-
temp fluid from the pump. Otherwise, there causes a possibility of frozen/condensate
adhesion of outside air moisture to the pump, and it may lead to a malfunction of motor
and pump.

18
●Maintenance and inspection
1. Regular inspection
Inspection Item Criteria and Precautions
Does the pump operate
smoothly without vibrating?
The allowable value for vibration is a maximum of 28/33µm (both
amplitude) when a 2P motor is used and a maximum of 47/54µm
(both amplitude) when a 4P motor is used (JIS-B8301 60/50HZ). If
noise from the bearing section or other abnormal noise is
produced, immediately turn off the pump and inspect each part of
the pump. If you are unable to locate the cause, please contact
Sanwa Hydrotech immediately.
Water level in the suction pipe
and pressure at suction port
The value on the pressure gauge is proportional to the specific
gravity of the liquid. Open the gauge cock on the pressure gauge
and compound pressure gauge only when conducting
measurements. Close the cock when measurements have been
completed.
Pump operating load Check the discharge pressure during operation against the value
displayed on the pump nameplate. Also, check to make sure that
the current value is no greater than the value displayed on the
motor nameplate.
At least once each year, the pump should be disassembled and inspected, and parts should
be replaced at this time if necessary. Be sure to keep records of these inspections.
Always drain the liquid when the pump will not be used for an extended period of time (by
removing the plug and allowing the liquid to drain out). In cold regions, the liquid may freeze
and damage the pump.
Frequently starting up the pump will reduce the service life of both the pump and the motor.
The pump should not be started up more than six times in a single hour.

19
2. Pump configuration and part names
Part names (see table below) and assembly diagrams (see next page) have been provided to
give you a general understanding of the pump as an aid to proper pump handling. Use these as
a reference when consulting the Instruction Manual.
Part names
No. Part Material Qty. Remark
101 Motor shaft key ASTM A575 1045 1
100 Motor 1
69 Name plate AISI 304 1
64 Hexagon head bolt (base) AISI 304 4 S
63 Hexagon head bolt and nut (motor) AISI 304 4
62 Hexagon head bolt (casing) AISI 304 6 S
61 Set screw ASTM A294135 1
50 Base AISI 304 1
45 Bushing SiC-D 2
33 O ring 1 size 11, 22
Sheet gasket 1 size 21
29 Thrust ring SiC 1
20B Magnet coupling (outer) ASTM A536 Gr, 60 1
20A Magnet coupling (inner) AISI 316 1
15 Frame adapter ASTM A48M CLASS, 30B 1
8 Shaft SiC 1
4 Rear casing AISI 316 1
2 Casing ACI-CF-8M 1
1A Pin AISI 316 2
1 Impeller ACI-CF-8M 1
NOTE： Part#1Impeller and #20A Magnet coupling(P) are built as an integral structure.
Assembly diagram