MagnaTex MP Series Manuel utilisateur
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Copyright 2020 Magnatex Pumps Inc.
INSTALLATION, OPERATION AND
MAINTENANCE MANUAL (IOM)
MP SERIES CLOSE-COUPLED
MAGNETIC DRIVE SEALLESS PUMPS
MP / ML / MH (MPH)
PHONE (713) 972-8666 / FAX (713) 972-8665
3575 West 12th Street Houston, TX 77008
www.magnatexpumps.com
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Copyright 2020 Magnatex Pumps Inc.
DANGER
MAGNETIC DRIVE PUMP
Do not work on this pump if you are wearing a MEDICAL DEVICE (DEFIBRILLATOR, PACEMAKER,
etc.).
Personnel who experience interference with their medical device should move away from the
pump and refrain from handling magnetic pump components. Seek immediate medical attention
if you have experienced interference with your medical device.
The rare earth permanent magnets in this pump have been manufactured such that the magnetic
field is directional toward each half of the magnetic coupling. For this reason, the magnetic field
that exists outside of the assembled magnetic coupling is minimal. When the two halves are
apart, the magnetic field is exposed, which is why we recommend that personnel wearing medical
devices DO NOT HANDLE the magnetic coupling components. When the pump is
assembled, the magnetic fields from the magnetic coupling components are not exposed and it is
safe for those who wear medical devices to be in the general proximity of the assembled pump,
whether the pump is in operation or not.
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Copyright 2020 Magnatex Pumps Inc.
TABLE OF CONTENTS
Operating Instructions………………………………………………………………………………………..4
Receipt of Equipment………………………………………………………………………………………….4
Foundation………………………………………………………………………………………………………….5
Location and Piping……………………………………………………………………………………………..5
Rotation Check and Start-Up……………………………………………………………………………….7
Priming………………………………………………………………………………………………………………..7
Operations and Maintenance………………………………………………………………………………8
Maintenance Schedule………………………………………………………………………………………..9
Storage Procedures……………………………………………………………………………………………..9
Torque Check………………………………………………………………………………………………………10
MP Series Parts List…………………………………………………………….……………………………….11
MP Cross Section Drawing…….………………………………...………………………………………….12
Disassembly of Wetted End…………………………………………………………………………………13
Disassembly of the Outer Magnet and the Motor……………………………………………….15
Assembly of Wetted End……………………………………………………………………………………..16
Assembly of the Outer Magnet and the Motor……………………………………………………18
Final Assembly…………………………………………………………………………………………………….19
Torque Chart……………………………………………….………………………………………………………20
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Copyright 2020 Magnatex Pumps Inc.
OPERATING INSTRUCTIONS
MP SERIES CLOSE COUPLED PUMPS
This instruction manual is intended to help those responsible for the installation, operation
and maintenance of MAGNATEX Magnetic Drive Sealless Pumps. We recommend
thoroughly reading this manual and reviewing the Hydraulic Institute Standards regarding
Horizontal Centrifugal Pump installation before installing and operating your pump.
Magnatex Pumps, Inc does not assume responsibility from failure to follow the instructions
in this manual.
RECEIPT OF EQUIPMENT
A. Before uncrating, check for potential physical damage to the pump assembly and notify
the common carrier IMMEDIATELY if any damage is found.
B. Check the nameplate on the pump against receiving and purchase order documents to
be sure that the correct size pump and materials of construction have been supplied. If
a motor has been supplied, check for correct enclosure, horsepower, speed, and
voltage. Check to make sure that all accessories are in the package. Installing the wrong
pump could result in injury or death and/or damage to the pump.
C. Check to see if the nozzle protectors are intact as furnished by MAGNATEX Pumps. If
not intact, check for foreign objects that may have found their way into the pump casing
through the flange openings.
D. Check for free rotation of the pump especially if potential damage in shipping is
suspected. Remove the motor fan cover and rotate the pump using the motor shaft.
The pump should rotate smoothly and only slight resistance should be felt. If the pump
has heavy resistance, or if any noise is heard, call your MAGNATEX representative or
MAGNATEX PUMPS, INC. at (713) 972-8666.
ATTENTION
WHEN WORKING ON MAGNETICALLY DRIVEN PUMPS
When working on the pumps, be aware that tools or metal parts
brought within proximity to the magnets may suddenly be
attracted, trapping fingers in the process.
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Copyright 2020 Magnatex Pumps Inc.
FOUNDATION
The foundation should be firm and heavy to reduce vibration. A concrete foundation with a
solid baseplate is recommended.
LOCATION AND PIPING
A. Locate the pump as close as practical to the source of liquid supply.
B. The suction line should be as short and straight as possible and contain a minimum
number of elbows. Any elbow should be of the large radius type. Elbows and fittings
should be no closer than 10 pipe diameters from the pump suction to allow undisturbed
flow to the pump impeller. Horizontal suction piping should gradually rise toward the
inlet of the pump (minimum gradient of 1/50).
C. Generally, suction piping should be one or two sizes larger than the pump suction. This
will keep friction losses to a minimum. This becomes more important as the distance
between the pump and the liquid supply increases, or if fittings are located closer than
10 pipe diameters to the pump’s suction.
D. The suction piping should have no high spots where air pockets can collect. All joints in
the suction line should be tight to prevent air from entering into the system and
creating the possibility of vapor locking. This is especially important when suction
pressure is lower than the atmospheric pressure. A pressure gauge should be installed in
the suction line as close as possible to the suction flange.
E. An air vent should be installed at the initial high point in the pump discharge line. A
check valve and shut-off valve should be installed as close as possible to the pump
discharge nozzle. The check valve is installed to protect the pump from excessive back
pressure, including reverse flow/rotation, and back flow during shut down or driver
failure. The discharge valve is at the pump discharge to regulate flow and isolate the
pump for servicing. A pressure gauge should also be installed as close as possible to the
discharge nozzle between the pump and the discharge valve.
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Copyright 2020 Magnatex Pumps Inc.
F. Particles can block the bearing lubrication ports in the pump causing serious damage. In
addition, metallic particles can magnetically attach to the inner magnet also resulting in
damage. If possible, a temporary start-up strainer with a 40 x 40 mesh screen should be
installed in the pump’s suction line, though not on the pump suction flange. BE VERY
CAREFUL not to allow the temporary strainer to be plugged to the point of starving the
pump of liquid. This may result in cavitation and the possibility of running the pump dry
which will destroy the pump’s silicon carbide bearing system. It is recommended to
install a pressure gauge between the strainer and the pump to monitor possible
plugging of the strainer. The discharge pressure should also be closely monitored. Any
drop in discharge pressure without adjusting the discharge valve could suggest strainer
plugging (assuming constant demand to the system).
G. MAGNATEX pumps, although very rugged, are not designed to handle pipe stress. The
resulting forces and moments can result in possible damage to the pump. Piping must
be anchored and supported as close as possible to, but independent from the pump.
Pump and pipe flanges must be positioned together without using force before
attempting to tighten the flange bolts.
H.
Adequate liquid should always be available to the pump suction. A flow sensor and/or
watt monitor should be installed to shut the pump down in the event of dry run.
MAGNATEX provides an optional Electronic Pump Protector (PMP-25 and PMP-25V),
which we recommend you purchase.
WARNING
NEVER RUN THE PUMP DRY
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Copyright 2020 Magnatex Pumps Inc.
ROTATION CHECK AND START-UP
To confirm the direction and rotation against the rotation arrow on the pump casing use the
following procedure:
A. Open the suction and discharge valve and allow the pump to be filled with liquid. Do not
attempt to bump the motor to check rotation without liquid in the pump.
B. Remove the motor fan cover for visual inspection rotation.
C. Bump the motor by quickly pushing the motor start/stop buttons. Rotation should be
clockwise as seen from motor end. If the direction of rotation is incorrect, reverse two
of the three-phase power leads to the motor. Keep your hands away from the fan motor
to avoid injury.
D. After confirming proper rotation replace the motor fan cover.
PRIMING
A. Open the suction and discharge valves and allow the pump to fill with liquid. If the
direction of rotation has not been checked, this must be done as detailed above.
B. Close the discharge valve to 1/4 open.
C. Start the motor and immediately check the discharge pressure gauge. The pressure
WARNING
NEVER RUN THE PUMP DRY
WARNING
NEVER RUN THE PUMP DRY
DANGER
ONLY PROPERLY QUALIFIED PERSONNEL SHOULD BE
WORKING ON PUMPS OR ELECTRIC MOTORS
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Copyright 2020 Magnatex Pumps Inc.
should rise quickly and hold steady. If the pressure rises and then falls back, there is air
or vapor in the system. STOP THE PUMP IMMEDIATELY. Wait 15 to 20 seconds before
restarting the pump.
D. If after repeating Step C several times, the pressure gauge does not hold steady or does
not yield the expected pressure (from performance curve), contact your Magnatex
representative, or MAGNATEX PUMPS, INC., for assistance. Do not continue to operate
the pump under these conditions.
E. Once the pump is fully primed and the discharge pressure is satisfactory, slowly open
the discharge valve until the desired operation point is reached. Stop the pump
immediately if you hear any unusual noises or vibration and call MAGNATEX PUMPS at
1-866-624-7867.
OPERATIONS AND MAINTENANCE
A. Operators should make frequent visual inspections to insure the pump is running
smoothly without noise or vibration. The discharge pressure should hold steady without
fluctuation. Any excessive heating of the pump or motor bearings is cause for alarm. The
unit should be shut down immediately, an investigation made to find the cause, and
corrective action taken.
B. Follow the motor manufacturer’s recommendations and keep the motor bearings
lubricated properly.
WARNING
Never throttle the pump by closing the valve on the suction
side of the pump. Throttling the suction side can cause serious
damage to the pump. Throttle only from the discharge valve.
WARNING
Never operate the pump against a closed discharge valve. Low
flow operation can cause rapid heating of the pumped liquid
with possible vaporization of the liquid inside the pump,
resulting in serious damage to the pump.
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Copyright 2020 Magnatex Pumps Inc.
MAINTENANCE SCHEDULE
PARTS TO BE INSPECTED
Inspect Frequency
Inner Magnet
Sub-Assembly
Check Thrust Rings, Sleeves, and
Bushings for wear. Use a dye penetrant
test and replace any chipped, cracked or
broken pieces. Use new casing gasket
upon reassembly.
Every 2 to 3 years
(depending on
service).
Motor As recommended by the motor
manufacturer.
As directed in the
motor operations
manual.
STORAGE PROCEDURES
As shipped, the pumps are suitable for short term storage only, up to 3 months. If long term
storage is necessary before the pump is put into operation, contact your local representative or
MAGNATEX PUMPS, for long term storage recommendations.
For maximum protection, cover the pump with plastic or another protective material. Motors
should be rotated by hand every three (3) months.
Before start-up, refer to the section titled “Rotation Check and Start-Up” (see Page 7).
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Copyright 2020 Magnatex Pumps Inc.
MINIMUM MAGNET TORQUE VALUES:
TORQUE CHECK
To determine the static breakaway
torque of the magnet couplings, place
a torque wrench on the impeller nut
and hold the motor fan shaft with
locking pliers. Slowly turn the torque
wrench counterclockwise (as seen
from motor end) until the magnets
turn over (decouple). The preferred
method for checking torque is to
insert the torque wrench through the
suction nozzle, leaving the casing
attached to the pump [Fig. 1].
Minimum torque values are as
follows:
Magnet Size Minimum Torque (ft-lb)
N25
N40
6.3
10.6
Figure 1
Table des matières
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