Johnson Pump MDR Series Instruction Manual Download Page 20

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MDR/EN (0909) 1.0

Problem

Possible cause

Remedy

Leakage from pump
body

Loose pump body screws

Tighten screws

Wrongly installed O-ring

Replace O-ring

Damaged O-ring

Replace O-ring
Make sure that the material
is resistant to the media

Shaft break

Dry running, thermal-shock,
running against closed
valve, shock at
handling, corrosion

Replace shaft
Make sure that the material
is resistant to the media

Short of head

Increase discharge head
(see section 2.3)

Magnet housing
damage

Dry running, excessive
wear, running against closed
valve, corrosion

Replace magnet housing
Make sure that the material
is resistant to the media
and that no dry running will
occur

Short of head

Increase discharge head
(see section 2.3)

Impeller damage

Excessive wear, corrosion

Replace impeller
Make sure that the material
is resistant to the media

Impeller deformation

Excessive temperature

Replace impeller (see
section 2.5)

Excessive temperature vs
system pressure

Replace impeller (see
section 2.6)

Summary of Contents for MDR Series

Page 1: ...Instruction Manual MDR series Magnetic Drive Centrifugal Pumps Read and understand this manual prior to operating or servicing this product MDR EN 0909 ...

Page 2: ...ries 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 20...

Page 3: ...vel______________________________________ 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...

Page 4: ...5 0 Spare parts list_ ___________________________________________18 6 0 Trouble shooting chart______________________________________19 7 0 Dimensions and weights____________________________________21 ...

Page 5: ...ately 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...

Page 6: ...friction heat If there is a risk of dry running install a suitable dry running protection to avoid serious damages All electrical installation work must be carried out by authorized personnel in 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 b...

Page 7: ...e the warranty If the pump does not function satisfactorily contact your distributor 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 ...

Page 8: ...d valve Do not run reverse The impeller must rotate in clockwise direction when viewed from the motor end see rotation arrrow on the pump body Do not run with cavitation or air entrainment Do not run with fluid containing solid or abrasive particles without consulting your local distributor Do not expose the pump to thermal chocks Check the impeller bearing shaft and wear plates regularly for wear...

Page 9: ...2 O3 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 suction nozzle must be more than 3 x the diameter of the suction pipe 1 ø x 3 H 1 ø ...

Page 10: ...equired 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 ...

Page 11: ...osity and specific gravity limits Impeller diameter Max viscosity cP Specific gravity kg dm3 1V 10 1 2 1VD 30 1 8 2 8 Sound level Highest measured sound level for the MDR pump is 70 dB A for pump fitted to standard electric motor ...

Page 12: ...1 0 1 8 6 4 2 0 0 5 0 0 0 6 0 5 5 0 0 5 0 5 4 0 0 4 0 5 3 0 0 3 0 5 2 0 0 2 0 5 1 0 0 1 V 1 5 8 R D M V 1 5 7 R D M V 1 5 4 R D M V 1 6 1 1 R D M V 1 5 0 1 R D M 3 0 Capacity 3 1 MDR 1V full impeller diameter Based on water at 20 C 68 F Flow l min Head m ...

Page 13: ...ter Based on water at 20 C 68 F Flow l min Head m 8 2 6 2 4 2 2 2 0 2 8 1 6 1 4 1 2 1 0 1 8 6 4 2 0 0 5 0 0 0 6 0 5 5 0 0 5 0 5 4 0 0 4 0 5 3 0 0 3 0 5 2 0 0 2 0 5 1 0 0 1 D V 1 6 1 1 R D M D V 1 5 4 R D M D V 1 5 8 R D M D V 1 5 7 R D M D V 1 5 0 1 R D M ...

Page 14: ... piping during piping work Only use pipe sealants formulated specifically for plastics i e Teflon tape Permatex no 2 etc Use the grip on the pump outlet when assemb ling disassembling the pipe connections to avoid damaging the pump body see fig Install a valve on the suction and pressure side to be able to disconnect the pump from the system Make sure that the pump can be drained without damaging ...

Page 15: ...closed valve for more than 3 minutes When returning a pump for repair investigation or other reason it must be cleaned and wrapped up in a proper way Documentation stating pumped liquid operating conditions your own opinion of fault failure reason and your contact person must be included in the pump package Also contact the consignee before returning the pump 4 4 Routine control To avoid problems ...

Page 16: ...Secure with Loctice 3 Assemble the drive magnet pos 13 to the motor shaft and lock the drive magnet with the two locking screws pos 2 The screws can be reached through the assembling hole in the flange see section 5 0 4 Assemble the magnet housing pos 3 with the reinforcement pos 19 not available for MDR45 on the flange and check that the drive magnet can be turned without touching the magnet hous...

Page 17: ...0909 1 0 4 6 Waste handling material recycling At the products end of life please dispose of the product according to applicable law Where applicable please disassemble the product and recycle the parts material ...

Page 18: ...8696 Impeller 1VD PVDF Rulon 04 35671 02 04 46244 02 04 35361 02 04 46246 02 04 46613 02 6 1 2 Bearing Rulon 01 35348 1 58 08311 58 08311 58 08342 58 08342 7 1 O ring FPM 0 2172 021 0 2172 029 0 2172 020 0 2172 022 0 2172 022 8 1 Body PP 01 24375 1 58 08307 01 13100 1 04 35766 58 08368 1 Body PVDF 01 24406 1 58 08308 01 13115 1 58 08659 58 08369 9 Washer SS 0 0350 605 6 0 0350 207 6 0 0350 208 12 ...

Page 19: ...n line make sure that it is properly sealed Fill the pump again Underfeed Air entrainment or air pockets Check joint sections of suc tion lines Work out all air Run reverse Check direction of rotation Excessive piping loss Reduce suction line length or increase diameter Impeller is clogged with foreign materials Remove foreign materials Excessive power Excessive specific gravity and or viscosity C...

Page 20: ...t to the media Short of head Increase discharge head see section 2 3 Magnet housing damage Dry running excessive wear running against closed valve corrosion Replace magnet housing Make sure that the material is resistant to the media and that no dry running will occur Short of head Increase discharge head see section 2 3 Impeller damage Excessive wear corrosion Replace impeller Make sure that the ...

Page 21: ... MDR75P 1V 1VD 100 80 192 322 63 141 60 37 BSP1 1 4 BSP3 4 7 M5 11 5 8 1 5 MDR85P 1V 1VD 112 90 242 373 71 171 66 40 BSP1 1 2 BSP1 7 M5 14 10 3 2 9 MDR105P 1V 1VD 140 100 320 490 90 222 90 58 5 BSP2 BSP1 1 4 10 M8 24 23 6 7 2 MDR116P 1V 1VD 140 125 320 512 90 222 93 58 5 BSP2 BSP1 1 4 10 M8 24 26 6 7 2 7 0 Dimensions and weights Dimensions in mm Coupling towards motor shaft without motor ...

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