AxFlow Aturia NA Series, Operation & Maintenance Manual

Page 1: ...Single Stage Mechanically Coupled End Suction Centrifugal Pump built to DIN 25255 standard NA SERIES OPERATION MAINTENANCE MANUAL...

Page 2: ...tructions before putting the pump into service Installation and operation should be carried out by qualified personnel only Danger of electrocution Electric supply must be isolated before working on t...

Page 3: ...Foundations 8 Motor pump units on baseplates 8 Pump and motor alignment 9 Methods of checking alignment 10 Straight edge 10 Dial gauge clocking 11 Optical methods 11 Location and piping 11 Admissible...

Page 4: ...SASSEMBLY 25 Disassembling the pump 25 Complete pump disassembling 25 Partial pump disassembling 25 Support and rotor disassembling 26 Gland packing inspection 26 Mechanical seal inspection 26 Bearing...

Page 5: ...lled trained personnel The manufacturer will not accept liability if these instructions are not followed This manual does not take into account any specific local regulations or bylaws that may be app...

Page 6: ...with AxFlow standard electric motors For other motors the table values shall be compared to the actual used motors MOTOR FRAME SIZE MOTOR SPEED 2 Pole 4 Pole 63 65 65 71 67 65 80 71 65 90 73 67 100 77...

Page 7: ...CLOSED DISCHARGE VALVE AVOID THERMAL SHOCK FROM COLD FLUIDS AGAINST WARM SURFACES ONLY USE THE PUMP WITH FLUIDS SPECIFIED IN THE ORDER DATASHEETS Residual risks Inobservance of the safety instructions...

Page 8: ...d electric motors are only suitable for operation in safe areas free from the danger of explosive liquids or gases Spare parts Spare parts are available from AxFlow throughout Great Britain Please quo...

Page 9: ...if any damage is found Check that the port covers are intact If not check whether foreign objects may have found their way into the pump casing through the ports Remove the port covers only when you...

Page 10: ...efully dry inside the pump if necessary Protect the pump inside with anti condensation products and close the flanges so that no foreign objects can enter the pump Cover the pump with a plastic film a...

Page 11: ...t will cause high loads on the pump bearings Couplings must be suitably rated and provide sufficient flexibility to prevent shock forces and oscillating loads from being transmitted to the pump shaft...

Page 12: ...umpset should be mounted on a level horizontal base The base should be of sufficient rigidity to prevent flexing When bolting the pump down insert shims as necessary under the pump feet to level the p...

Page 13: ...AND MOTOR PRIOR TO START UP Pump and motor alignment Long coupled pumps have been pre aligned with the motor prior to shipment If pump units receive rough treatment during shipment they can become mis...

Page 14: ...length 0 04 mm per 100 mm coupling diameter Methods of checking alignment Straight edge Using a straight edge check the distance from the shaft at several points on the circumference of the coupling T...

Page 15: ...the pump ports so that they can be connected to the pump without forcing Maximum allowable bending moments are set out in the Table overleaf These moments must not be exceeded otherwise the pump may...

Page 16: ...oot valve strainer must always be immersed at a sufficient depth to avoid entry of air into the pump Take suitable precautions to prevent vortexing in the supply vessel A pressure gauge should be inst...

Page 17: ...solids such as pipe scale welding beads and dirt If possible a TEMPORARY START UP STRAINER with a 40 mesh screen should be installed in the suction line BE VERY CAREFUL not to allow the temporary stra...

Page 18: ...ion 70 55 45 100 50 25 38 70 Delivery 45 38 28 70 38 18 28 50 8x16 8x20 8x25 8x31 8x40 Suction 95 75 60 140 75 38 55 100 Delivery 55 45 35 80 50 25 38 70 10x16 10X20 10x25 10x31 10x40 Suction 125 100...

Page 19: ...k causing liquid vaporization and cavitation in the pump with the risk of loss of liquid film in the bearings Dead heading If the pump is permitted to run against a closed discharge for more than a sh...

Page 20: ...eck that the terminal links are correctly positioned for the supply voltage Ensure that the earth connection is properly and securely made Before replacing the terminal box lid check that the sealing...

Page 21: ...f the following oils Use ISO VG 46 viscosity oil for bearing temperature from 0 to 70 C AGIP OSO46 classification or equivalent Use ISO VG 68 viscosity oil for bearing temperature 70 to 90 C AGIP OSO...

Page 22: ...use the following procedure a Open the suction and discharge valves allowing the pump to fill with liquid b Remove the coupling guard of a long coupled pump or the motor fan cover of a close coupled...

Page 23: ...s and then falls back there is air or vapour in the system STOP THE PUMP IMMEDIATELY Wait a few seconds before restarting pump 3 If the pressure gauge does not hold steady after repeating step 2 sever...

Page 24: ...ion check shaft seal it is a mechanical seal and therefore there should be no leaks Pump operation Operators should make frequent visual inspections to check that the pump is running smoothly without...

Page 25: ...poor hydraulic conditions bearing wear internal erosion or chemical attack before it seriously damages the pump Vibration may be monitored on the external bearing housing and or the motor bearings Yo...

Page 26: ...nning for very long periods with minimal attention Please see previous PUMP OPERATION section PARTS TO BE INSPECTED ACTION TO BE TAKEN FREQUENCY External bearing housing long coupled units Fill with a...

Page 27: ...th with a 45 angle insert the new seal rings in the stuffing housing paying attention that gaskets of the single rings do not coincide among them lower the stuffing box and lock it with stud nuts lock...

Page 28: ...lassification or equivalent Use ISO VG 68 viscosity oil for bearing temperature 70 to 90 C AGIP OSO 68 classification or equivalent OIL QUANTITY BEARING BRACKET SIZE 24 0 4 lt Fill to the middle of th...

Page 29: ...n be removed from the pump casing without disturbing the pipework If a spacer coupling is fitted between pump and motor the pump can be dismantled without disturbing the motor Complete pump disassembl...

Page 30: ...upport the stuffing box housing complete with stationary ring of the mechanical seal Pump with integral mechanical seat site in mechanical seal cover 1 Disassembly from the complete support the stuffi...

Page 31: ...Reassembling the pump Refer to Pump disassembling and proceed in the reverse order Start from the bearing housing then reassemble the casing cover shaft seal and impeller The bearings should be mounte...

Page 32: ...h the relative site on the stationary ring 2 exactly place the mechanical seal rotating part on the sleeve then insert it into the stuffing box housing 3 close with the mechanical seal cover after int...

Page 33: ...TYPICAL CROSS SECTION NA Series Operating Instruction Manual Page 29 TYPICAL CROSS SECTION NE 6x31 NE 8x31 NE 10x31 NE 10x40 NE 12x31 NE 12x40 NE 15x31 NE 15x40...

Page 34: ...TYPICAL CROSS SECTION NA Series Operating Instruction Manual Page 30 NE 5x31 NE 8x40 NE 15x25 NE 15x50 NE 20x31 NE 20x40 NE 20x50 NE 25x31 NE 25x40 NE 25x50...

Page 35: ...2540 1 Thrower delivery side 4590 5 Mechanical Seal Cover Gasket 2905 Impeller Washer 6515 Plug 2905 1 Washer 6515 1 Plug 2905 2 Washer 6515 2 Plug 2912 Impeller Nut 6541 Lock Washer 3011 Radial Ball...

Page 36: ...tention Regular inspection and preventive maintenance when necessary will help to prevent breakdowns There are many possible reasons why a pump may not run properly If your AxFlow Aturia NA Series pum...

Page 37: ...ir or vapour Check for vortexing in the inlet line Fit baffles in supply tank to prevent vortexing Fit a settling tank in the inlet line to allow entrained gas to separate from the liquid Low inlet pr...

Page 38: ...flow Fit orifice plate in discharge line to restrict flow MOTOR OVERHEATS AND OR CUTS OUT Actual total discharge head is below rated head of pump Reduce speed of rotation if possible Fit smaller diame...

Page 39: ...valve fully Check for excessive liquid viscosity increase liquid temperature if necessary Reduce liquid temperature Motor and pump misaligned Refer to INSTALLATION section Coupling worn Replace coupli...

Page 40: ...ce liquid temperature Increase inlet pipework bore Decrease length of inlet pipework Open inlet valve fully Check for excessive liquid viscosity increase liquid temperature if necessary Reduce liquid...

Page 41: ...led its various components should be properly disposed of Make sure that no residual polluting liquids are trapped with the pump The disposal of polluting liquids and materials should follow current e...

Page 42: ...NOTES NA Series Operating Instruction Manual Page 38 NOTES...

Page 43: ...SJ Tel 020 8579 2111 Email info axflow co uk Aberdeen Office Unit 3 Harlaw Centre Howe Moss Crescent Kirkhill Industrial Estate Dyce Aberdeen AB21 0GN Tel 01224 729367 Email infoscot axflow co uk Hudd...