Johnson Pump MDR Series Manuale utente
Instruction Manual
MDR-series
Magnetic Drive Centrifugal Pumps
Read and understand this manual prior to
operating or servicing this product.
MDR/EN (0909)
Declaration of conformity
(Directive 98/37/EG, Annex IIA)
Manufacturer
SPX Process Equipment NL B.V.
Dr.A.F. Philipsweg 51, 9403 AD Assen
P.O. Box 9, 9400 AA Assen
The Netherlands
We declare under our sole responsibility that the product:
MDR-series
Magnetic Drive Centrifugal Pump
is in conformity with
COUNCIL DIRECTIVE on the approximation of the laws of the
Member States relating to Machinery 98/37/EG.
Declaration of incorporation
(Directive 98/37/EG, Annex IIB)
The pump must not be put into service until the machinery into which it is to
be incorporated has been declared in conformity with the provisions of the
Directive.
Assen, May 1 st 2008
Gerwin Schaafsma
Managing Director
Index
1.0 Introduction ______________________________________________5
1.1 General____________________________________________________5
1.2 Reception, handling and storage_______________________________5
1.2.1 Reception __________________________________________________ 5
1.2.2 Handling___________________________________________________ 5
1.2.3 Storage ____________________________________________________ 6
1.3 Safety _____________________________________________________6
1.4 Type designation ____________________________________________7
1.5 Function and operating principle ______________________________7
1.6 General precautions _________________________________________8
1.7 Standard parts ______________________________________________8
2.0 Technical information ______________________________________9
2.1 Material specification ________________________________________9
2.2 Suction lift and liquid level ___________________________________9
2.2.1 Max suction lift (Hs) _________________________________________ 9
2.2.2 Min required liquid level _____________________________________ 9
2.3 Min back pressure__________________________________________10
2.4 Min flow required __________________________________________10
2.5 Temperature range _________________________________________10
2.6 Max temperature versus system pressure ______________________10
2.7 Viscosity and specific gravity limits____________________________11
2.8 Sound level _______________________________________________11
3.0 Capacity_________________________________________________12
3.1 MDR - 1V (full impeller diameter) ___________________________12
3.2 MDR - 1VD (reduced impeller diameter)______________________13
4.0 Installation and maintenance _______________________________14
4.1 General___________________________________________________14
4.2 Installation and piping ______________________________________14
4.3 Start up___________________________________________________15
4.4 Routine control ____________________________________________15
4.5 Disassembly and assembly___________________________________16
4.5.1 Disassembly _______________________________________________ 16
4.5.2 Assembly _________________________________________________ 16
4.6 Waste handling/material recycling ____________________________17
5.0 Spare parts list ___________________________________________18
6.0 Trouble shooting chart_____________________________________19
7.0 Dimensions and weights ___________________________________21
5
MDR/EN (0909) 1.0
1.0 Introduction
1.1 General
Johnson magnetic drive centrifugal pumps type MDR are manufactured by SPX Process
Equipment, Assen, The Netherlands.
This instruction manual contains necessary information on the magnetic drive
centrifugal pumps and must be read carefully before installation, service and maintenance.
The manual must be kept easily accessible to the operator.
Important!
The pump must not be used for other purposes than recommended and quoted for
without consulting SPX Process Equipment’s distributor.
Liquids not suitable for the pump can cause damages to the pump unit and imply
risk of personal injury.
1.2 Reception, handling and storage
1.2.1 Reception
Remove all packing materials immediately after reception. Check the consignment for
damage immediately on arrival and make sure that the name plate/type designation is in
accordance with the packing slip and your order.
In case of damage and/or missing parts, a report should be drawn up and presented to the
carrier at once. Notify your local distributor.
On the pump there is a plate with
article number and fabrication num-
ber.Always state these numbers and
the pump type when contacting your
local distributor.
1.2.2 Handling
Check the weight of the pump unit (see section 7.0). All parts weighing more than 20
kg must be lifted using lifting slings or suitable lifting devices, e.g. overhead crane or an
industrial truck.
Always use two lifting slings. Make sure that they
are secured in such a way as to prevent them from
slipping and that the pump unit is hanging straight.
Never lift the pump unit with only one fastening
point. Incorrect lifts can cause personal injury
and/or damage to the product.
Ø
No.
SPX Process Equipment NL B.V., P.O. Box 9,
NL-9400 AA Assen - www.johnson-pump.com
6MDR/EN (0909) 1.0
1.2.3 Storage
If the pump is not installed immediately, it must be stored in a dry and cool place.
1.3 Safety
Personnel who have a pacemaker should not be allowed to work with the magnetic
coupling! The magnetic field is sufficiently strong to affect the operation of a pacemaker.
A safe distance is 1 metre!
Important!
The pump must not be used for other purposes than recommended and quoted for
without consulting SPX Process Equipment’s distributor.
A pump must always be installed and used in accordance with existing national and
local sanitary and safety regulations and laws.
• Alwayswearsuitablesafetyclothingwhenhandlingthepump.
• Anchorthepumpproperlybeforestartuptoavoidpersonalinjuryand/ordamageto
the pump unit.
• Installshut-offvalvesonbothsidesofthepumptobeabletoshutoffthein-andoutlet
before service and maintenance. Check to see that the pump can be drained without
injuring anyone and without damaging the environment or nearby equipment.
• Makesurethatallmovablepartsareproperlycoveredtoavoidpersonalinjury.
• Donotrunthepumpdry.Ifthepumpisrundrythereisariskofpumpbreakdown
caused by generated friction heat. If there is a risk of dry running, install a suitable dry
running protection to avoid serious damages.
• Allelectricalinstallationworkmustbecarriedoutbyauthorizedpersonnelin
accordance with EN60204-1. Install a lockable circuit breaker to avoid inadvertent
starting. Protect the motor and other electrical equipment from overloads with suitable
equipment. The electric motors must be supplied with ample cooling air.
If the pump is used for easily flammable liquids it is absolutely necessary that the pump
and the pipe system is filled up before start up and during operation. Make sure that no
air occurs in the system. Follow the instructions for start up (see section 4.3).
In environments where there is risk of explosion, motors classified as explosion safe
must be used, along with special safety devices. Check with the governmental agency
responsible for such precautions.
Improper installation can cause fatal injuries.
• Dust,liquidsandgasesthatcancauseoverheating,shortcircuits,corrosiondamage
and fire must be kept away from motors and other exposed equipment. If the pump
handlesliquidshazardousforpersonorenvironment,somesortofcontainermustbe
installed into which leakage can be led.
• Ifthesurfacetemperatureofthesystemorpartsofthesystemexceeds60°C,these
areas must be marked with warning text reading ”Hot surface” to avoid burns.
7
MDR/EN (0909) 1.0
• Thepumpunitmustnotbeexposedtorapidtemperaturechangesoftheliquid
without prior pre-heating/pre-cooling.Absolutely forbidden to flush a hot pump with
cold water. Big temperature changes can cause crack formation or explosion, which in
turn can entail severe personal injuries.
• Thepumpmustnotoperateabovestatedperformance.
• Beforeinterveninginthepump/system,thepowermustbeshutoffandthestarting
device be locked. When intervening in the pump unit, follow the instructions for
disassembly/assembly. If the instructions are not followed, the pump or parts of the
pump can be damaged. It will also invalidate the warranty.
• Ifthepumpdoesnotfunctionsatisfactorily,contactyourdistributor.
1.4 Type designation
Example
1 Family name
Magnetic Drive Centrifugal Pump
2 Pump size
45, 75, 85, 105, 116
3 Pump material
P2 = polyvinylidenfluoride (PVDF)
P3 = polypropylene (PP)
4 Impeller diameter
1V = full diameter for specific gravity up to 1.2 kg/dm3 and viscosity 10 cP
1VD = reduced diameter for specific gravity up to 1.8 kg/dm3 and viscosity 30 cP
1.5 Function and operating principle
The drive magnet, attached to the drive shaft transfers its torque to the impeller magnet.
The impeller can thereby rotate around the ceramic shaft in the pump body without any
physical contact between the drive shaft and the pump body. This makes the pump
completely leak-proof.
Ceramic shaft
Impeller magnet
Impeller
Magnet housing
Drive shaft
Drive magnet
MDR 45 P2 - 1V
1 2 3 4
8MDR/EN (0909) 1.0
1.6 General precautions
• Donotrundry.Ifthepumpisrunwithoutliquid,frictionheatwillbegeneratedinside
the pump which will melt the impeller onto the ceramic shaft and also possibly cause
damage to other parts.
• Donotusethepumpforotherliquidsthanquotedforwithoutconsultingyour
SPX Process Equipment distributor.
• Donotrunagainstclosedvalve.Thepumpwillbedamagedifitisrunmorethan3
minutes against closed valve.
• Donotrunreverse.Theimpellermustrotateinclockwisedirectionwhenviewedfrom
the motor end (see rotation arrrow on the pump body).
• Donotrunwithcavitationorairentrainment.
• Donotrunwithuidcontainingsolidorabrasiveparticleswithoutconsultingyour
local distributor.
• Donotexposethepumptothermalchocks.
• Checktheimpellerbearing,shaftandwearplatesregularlyforwear(seesection4.4).
• Donotcausechockpressure.
1.7 Standard parts
1. Pump body 4. Impeller 7. Magnet housing 10. Flange
2. Wear plate 5. Ceramic
shaft
8. Reinforcement
(not available for MDR45)
11. Motor
3. Bearing 6. O-ring 9. Drive magnet
65423321
79810
11
9
MDR/EN (0909) 1.0
2.0 Technical information
2.1 Material specification
Flange (not exposed to the liquid) Polypropylene filled with glass fibre
Magnet housing, impeller, body Polypropylene filled with glass fibre alt
Polyvinylidenfluoride with carbon fibre
Shaft, wear plates Ceramic/Al2O3
Impeller bearings PTFE-Rulon LD
O-ring FPM
Impeller magnet
(not exposed to the liquid)
Ferrite
2.2 Suction lift and liquid level
2.2.1 Max suction lift (Hs)
Hs [m] =
To be used only as a guidance.
Please contact your local
distributor for NPSH curves.
2.2.2 Min required liquid level
Minimum required liquid level at the
suctionnozzlemustbemorethan3x
the diameter of the suction pipe.
1øx3>H
1øx3>H
1ø
ø1
Foot-valve
Hs
4
Specific gravity [kg/dm3]
Pump
Foot-valve
Filling liquid
10 MDR/EN (0909) 1.0
2.3 Min back pressure
The MDR-series demands a
certain head for good function.
Min head = 0.5 m wc or 0.05 bar
manometric pressure. If less,
install a valve in the discharge
pipe to adjust head.
2.4 Min flow required
To cool and lubricate the impeller bearing and shaft a certain flow
is required through the pump.
Min. flow
l/min
Max. system pressure
bar (20°C)
MDR45 3 3
MDR75 5 3
MDR85 7 3
MDR105 10 3
MDR116 10 3
2.5 Temperature range
P2(PVDF) =-10°C-+100°C
P3(PP) =-10°C-+85°C
2.6 Max temperature versus system pressure
Valid for P3 (polypropylene) pumps tested in water
H
Pump
1
2
4
3
10 20 30 40 50 60 70 80 90
p (bar)
MDR45 / 85 / 105 / 116
°C
MDR75
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