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Series MNKA, 

acc. to ASME

 

Page 21

 

9250-050-en 

Revision  11 

TM 7903

 

Edition   07/2010 

8

Faults 

Faults may result from inadmissible modes of 
operation.  Such  inadmissible  modes  of 
operation  –  even  brief  ones  –  may  cause 

serious damage to the unit.  
In  connection  with  explosion  protection,  potential 
sources  of  ignition  (overheating,  electrostatic  and 
induced charges, mechanical and electric sparks) can 
result  from  these  inadmissible  modes  of  operation; 
their occurrence can only be prevented by adhering to 
the intended use. 
See also 

Section 6.5

.

Should there be any uncertainty about the remedy to 
be applied, please inquire at the in-house pump office 
or at the pump manufacturer's. 

No delivery

 

:

Is the pump filled and vented? 
Is  the  suction  line  open,  vented,  cleaned  and 
correctly laid? 
Is  the  discharge  line  open,  vented,  cleaned  and 
correctly laid? 
Is the geodetic head too high? 
Is air being drawn in? 
Has the magnetic drive stopped? 

Flow rate too low : 

Have  the  pump,  suction  line  and  discharge  line 
been completely vented, filled and cleaned? 
Have any strainers installed been cleaned? 
Are all shut-off devices open?  
Is the geodetic head too high? 
Is the NPSHA too low or the NPSHR too high? 
Are the pipe resistances too high? 
Is the viscosity too high? 
Is the direction of rotation correct? 
Is  the  speed  too  low  or  the  impeller  diameter  too 
small? 
Are pump parts worn? 
Gas in the medium? 

Flow rate too high

 :

 

Is the geodetic head too low? 

Are the pipe or nozzle resistances too low? 
Is the pump speed too low or the impeller diameter 
too large? 

Delivery pressure too high : 

Is the speed too high  or the impeller diameter too 
large? 
Is the density too high? 

Motor consumes too much electricity : 

Is the flow rate, density or viscosity too high? 
Is the speed too high  or the impeller diameter too 
large? 
Is the coupling correctly aligned? 
Can the pump shaft be turned properly? 

Pump does not run smoothly or creates 
noises : 

Is the coupling well aligned? 
Are the coupling elements worn? 
Are the ball bearings damaged? 
Are parts of the hydraulics damaged? 
Is the flow rate too low or too high? 
Is the impeller balanced? 
Is the pump twisted? 
Is there foreign matter in the pump? 

Temperature of the ball bearings is too high : 

How high is the actual temperature measured? 
How high may it be acc. to the operating manual? 
Is the running-in phase already over? 
Deficient lubricant? 
Overaging / wear? 

Leak from the pump : 

Are  all  screws  tightened  to  the  correct  tightening 
torque? 
Were  the  sealing  surfaces  assembled  in  a  clean 
state? 
Have approved gaskets been installed? 

Summary of Contents for ASME Series

Page 1: ...rt installation operation and maintenance Subject to change without notice Reproduction is generally permitted with indication of the source Richter Chemie Technik GmbH 9250 050 en Revision 11 Edition...

Page 2: ...Coupling guard 13 5 11 Electric connection 13 6 Commissioning Shutdown 14 6 1 Initial commissioning 14 6 1 1 Filling the pump housing casing 14 6 1 2 Start up 14 6 2 Operating limits 14 6 2 1 Abrasiv...

Page 3: ...et http www richter ct com Authorised person acc to machinery directive 2006 42 EG Gregor Kleining Designation Single stage plastic lined magnetic drive chemical centrifugal pump series MNKA long life...

Page 4: ...ws flanges to ASME DN No x size Tightening torque inch ASME Nm in lbs 1 4 x 8 70 1 4 x 15 135 2 4 x S 25 220 3 4 x S 45 400 1 2 Name plate dry running ATEX and housing casing markings The stainless st...

Page 5: ...e series MNKA ASME are sealless plastic lined magnetic drive centrifugal pumps for the leak free conveyance of aggressive toxic pure and inflammable liquids The pump is equipped with a permanent magne...

Page 6: ...ring transport and storage of the magnetic drives as single components the notes on safety in Section 7 5 2 must be observed The points listed in Section 6 1 must be followed before recommissioning 2...

Page 7: ...er 9 3 allows no temperature class or temperature to be indicated The temperature class must be determined by the operated in accordance with Section 2 6 7 Temperature limits 2 6 5 Check of the direct...

Page 8: ...data sheet The plant customer must ensure that the prescribed operating temperature is observed The maximum admissible temperature of the liquid medium at the pump inlet depends on the temperature cl...

Page 9: ...as possible Elastomers are to be protected against UV light In general a storage period of 10 years should not be exceeded An admissible storage period of 4 years applies to elastomers made of NBR If...

Page 10: ...ainment shell chamber is also vented and evacuated through the bores in the plain bearing pedestal 339 Additional information is provided in the brochure and the Product manual 5 Installation 5 1 Safe...

Page 11: ...sitive suction head must also be observed The NPSHR value required for the pump is specified in the data shee The NPSHR available in the plant should be at least 1 64 ft 0 5 m higher than the NPSHR re...

Page 12: ...Problems on request 5 7 Drive The power consumption of the pump at the operating design point is specified in the data sheet and works certificate If the operating design point was not known when the...

Page 13: ...t prevention regulations It must be ensured that the coupling guard used is either made of spark free material or the impact test required by the EN 13463 is satisfied without any reservations Richter...

Page 14: ...turned by hand Check the direction of rotation of the motor with the coupling disengaged or with a rotary field instrument As viewed from the motor the direction of rotation of the pump is clockwise S...

Page 15: ...connection with explosion protection potential sources of ignition overheating electrostatic and induced charges mechanical and electric sparks may result from these inadmissible modes of operation t...

Page 16: ...index approx 85 Kinematic viscosity at 104 F 40 C s 2 mm 40 appr A fully synthetic gear oil to ISO VG 220 is to be used for temperatures below 68 F 20 C Replacing the bearings The ball bearings are de...

Page 17: ...ta carriers such as credit cards cheque cards ID cards with magnetic strips or magnetic tape 6 150 mm distance 7 6 Dismantling There are 3 possibilities for dismantling 1 Remove the complete pump from...

Page 18: ...ure that no plain bearing parts fall Silicon carbide is easy to break Use isolated gloves when handling hot bearings Failure to follow this instructions may result in property damage sever personal in...

Page 19: ...screw 914 1 with tooth lock washer 936 1 Secure thread with a drop of Loctite for example For tightening a hex socket key with 120 mm minimum length is required Screw bearing pedestal 330 lantern 344...

Page 20: ...ightening the housing casing screws 901 3 make sure that the support bracket 183 is firmly positioned If necessary undo support bracket align and secure again For tightening torques see Section 1 1 7...

Page 21: ...NPSHR too high Are the pipe resistances too high Is the viscosity too high Is the direction of rotation correct Is the speed too low or the impeller diameter too small Are pump parts worn Gas in the...

Page 22: ...61 rear bearing cover 400 1 flat gasket 401 housing gasket casing gasket 412 3 O ring 415 1 centering gasket 504 distance ring 509 1 intermediate ring 529 x bearing sleeve 545 x bearing bush 557 2 con...

Page 23: ...Series MNKA acc to ASME Page 23 9250 050 en Revision 11 TM 7903 Edition 07 2010 9 2 MNKA with long life grease lubrication...

Page 24: ...Series MNKA acc to ASME Page 24 9250 050 en Revision 11 TM 7903 Edition 07 2010 9 3 MNKA with oil bath lubrication...

Page 25: ...UMPEN CHEMICAL PROCESS PUMPS POMPE POUR L INDUSTRIE CHIMIQUE Baureihe Series S rie Ausf hrung Magnetkupplungspumpe ASME insatzgrenzen Design Magnet drive pump ASME operating limits Construction Pompe...

Page 26: ...iled by below mentioned notified body according to directive 94 9 EC Physikalische Technische Bundesanstalt PTB D 38116 Braunschweig Baureihe Series Registrier Nr Registered Baureihe Series Registrier...

Page 27: ...Interne Fertigungskontrolle Production Quality Assurance Angewandte EN 14121 harmonisierte Normen EN 809 Applied harmonised Standards Kennzeichnung 2006 42 EG Marking Das Unternehmen Richter Chemie T...

Page 28: ...mination of the pumps valves and component sent in for repair On the basis of this information for the contractor is it possible to meet the necessary preventive action during the execution of the rep...

Page 29: ...logical 2 and with which cleaning method radioactive 3 1 if no then forward to D other pollutant 2 Aggregates which are contaminated with microbiological or explosive substances are only accepted with...

Page 30: ...IOSTOFFV the procedures for the prevention of accidents as well as regulations to environmental protection e g the Waste Management Law AbfG and the Water Resources Act WHG An inspection repair of Ric...

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