Alfa Laval N Series Operating Manual Download | Manualshive

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M/105/0407

Series N

Stainless Steel Positive Displacement Rotary Lobe Pumps

Operating Manual

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Summary of Contents for N Series

Page 1: ...M 105 0407 Series N Stainless Steel Positive Displacement Rotary Lobe Pumps Operating Manual ...

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Page 3: ...ents 91 368 EEC 93 44 EEC 93 68 EEC Machine Description Type Size Serial Number This machinery has been designed and manufactured in accordance with the following transposed harmonised European Standards A technical construction file for this machinery is retained at the above address Signed Date Name Position Authorised Person P SWEET Quality Manager Rotary Lobe Pump EN292 Parts 1 and 2 1991 Safe...

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Page 5: ...er Applicable Directives Applicable Standards Specifications A technical construction file for this machinery is retained at the above address Signed Date Authorised Person Name Position Rotary Lobe Pump Motorised Electrical Equipment Low Voltage Directive 73 23 EEC Plastic Materials and Articles in contact with Foodstuffs Directive 90 128 EEC EN292 Parts 1 and 2 1991 Safety of Machinery Basic con...

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Page 7: ...ption Of Pump Or Pump Unit 3 1 General Pump Description 6 3 2 Principle Of Operation 6 3 3 Pump Dimensions 7 3 4 Pump And Pump Unit Weights 8 3 5 Pump Displacement And Capacities 8 4 0 System Design And Installation 4 1 System Design Advice 9 4 2 Pump And Base Foundations 10 4 3 Installation 10 4 4 Pipework 11 5 0 Start Up Shut Down And Cleaning In Place 5 1 Start Up Checklist 12 5 2 Pump Shut Dow...

Page 8: ...Pump 17 7 3 Fitting New Oil Seals 18 7 4 Automatic Pressure Relief Valve 19 8 0 Product Seals Removal And Fitting 8 1 Packed Gland 20 8 2 Single Mechanical Seal 21 9 0 Faults Causes And Remedies 22 10 0 Technical Data 10 1 Pump Information Chart 23 10 2 Lubrication 23 11 0 Typical Sectional Arrangement 24 ...

Page 9: ...ding on type size These conditions cannot always be obtained simultaneously The model type size will be shown on the nameplate positioned on the pump The pump pump unit will have been selected for the pump users specific application when known and the pump serial number will relate to this If the user has not specified the pumping application or needs to change it it is important to confirm that t...

Page 10: ...quirements Warnings Signs General safety instructions are preceded by this symbol Electrical safety instructions are preceded by this symbol Take great care when using caustic agents Always observe the technical data Never touch the pump or the pipelines when pumping hot liquids Never stand on the pump or pipelines Never run the pump with both the suction side and the pressure side blocked Always ...

Page 11: ... WHEN EP VITON NITRILE NEOPRENE HEATED ARAMID FIBRE GLAND PACKING EMMITS HARMFUL DUST RELEASES FUMES WHEN HEATED PAINT EXTERNAL PUMP SURFACES RELEASES DUST AND FUMES IF MACHINED TREAT AS A FIRE HAZARD Potential Safety Hazards The following section gives information on handling storage and disposal of parts and materials used in the pumps which may be considered hazardous to health Please pass this...

Page 12: ...ocuments 1 Checkthedeliverynoteagainstthegoods received 2 Check if the pump has been delivered with an electric motor that the motor instructions are available 2 2 Unpacking Caremustbetakenwhenunpackingthepump and the following stages must be completed 1 Inspectthepackingforanypossiblesigns of damage in transit 2 Carefully remove the packing away from the pump 3 Inspect the pump for any visible si...

Page 13: ...e left in place 2 Pumps received wrapped with corrosion inhibiting treatment material should be rewrapped 3 A clean dry storage free from vibration location should be selected When a moist dusty atmosphere must be used for storage further protect the pump or unit with a moisture repellent cover until it is to be installed 4 Rotate pump pump unit by hand weekly to prevent bearing damage 5 Allassoci...

Page 14: ...placement rotary type The volume at the inlet increases when the gears rotate and the product is drawn into the pump It is then transported in the space between the gears and the periphery of the body to the discharge side The volume between the gears is reduced here and the product is forced out through the outlet PUMP WITH DRIVE UNIT Motor Coupling Pump Front Cover Ports Product Seal Area Drive ...

Page 15: ...Certified drawings will be supplied on request Dimensions in millimetres Certified drawings will be supplied on request Dimensions in millimetres Certified drawings will be supplied on request Dimensions in millimetres G G G G G J J J J J K Key K Key K Key K Key K Key Width Width Width Width Width H H H H H F F F F F SHAFT SHAFT SHAFT SHAFT SHAFT Q Q Q Q Q P P P P P N N N N N L L L L L M M M M M B...

Page 16: ...l vary depending upon the specification of the pump and drive unit 3 5 Pump Displacement and Capacities The followingtabledetailsthepumpcapacities for the pump models This figure will change dependinguponspeed pressure temperature and product being pumped PUMP MODEL N1 000S H07 N1 000L H07 MAXIMUM SPEED RPM 1000 1000 APPROX DISPLACEMENT LITRES HOUR 1230 2316 3 4 Pump and Pump Unit Weights 8 ...

Page 17: ...l operation against a closed valve by using one of the following methods relief valves pressure switch current monitoring device DO fit suction and discharge pressure gauges to monitor pressures for diagnostic purposes DO install non return valve to prevent turbining when high pressures are applied to the pump whilst it is not in use Valves are also recommended if two pumps are to be used on manif...

Page 18: ...or securingthepumpunitafoundationisrequired thiswillalsoabsorbvibration strainorshockon the pumping unit Foundation Size The foundation should be approximately 100mm longer and wider than the mounting base of the unit The depth of the foundation should be proportional to the size of the pump unit Pump coupled to drive unit Bolt Location Dimensions The location and sizes of the relevant bolting dow...

Page 19: ...s to reduce friction losses in the pipework thereby improving the NPSH available Avoid Bends teesandanyrestraints close to either suction or discharge side of pump Use long radius bends wherever possible Provide Isolating valves on each side ofthepumptoisolatethepump when necessary Keep Pipework horizontal where applicable to reduce air locks Include eccentric reducers on suction lines Check Coupl...

Page 20: ...s the pipework system been flushed through to purge welding slag and any other hard solids 3 Have all the obstructions been removed from the pipework or pump 4 Arethepumpconnectionsandpipework joints tight and leak free 5 Are the pipework valves open 6 Are all safety guards in place 7 Start then stop the pump is the product flowing in the correct direction 8 Are the pump speed pressure settings be...

Page 21: ... the flow direction Top and bottom shaft drive pumps have opposite flow directions as illustrated Direction of flow TOP SHAFT DRIVE BOTTOM SHAFT DRIVE 5 2 Pump Shut Down Procedure 1 Turn the pump off 2 Isolate the pump drive unit from all power and control supplies 3 Close the pipework valves to isolate the pump 4 Ifthepumpistobedismantledrefertothe dismantling section 13 ...

Page 22: ...p to rapid temperature changes during C I P procedures as pump seizure can result from thermal shock A suitable by pass is recommended ALWAYS use rubber gloves and protective goggles when handling caustic agents ALWAYS rinse well with clean water after using a cleaning agent ALWAYS store discharge cleaning agents in accordance with current rules directives 5 4 Cleaning in Place CIP The pump can be...

Page 23: ...p so that any problems within the pump pipework will be highlighted YOUR WEEKLY SCHEDULE SHOULD INCLUDE CHECKINGTHE MECHANICALSEALS FOR LEAKAGE AND REPLACING AS NECESSARY CHECK PUMPING PRESSURES CHECKING THE OIL SEALS FOR LEAKAGE ADJUSTING THE PACKED GLANDS TO CONTROL LEAKAGE6 2 6 2 RECOMMENDED SPARE PARTS 6 2 Recommended Spare Parts The following table details the recommended spare parts which sh...

Page 24: ...ORE CONTINUING TO DISMANTLE THE PUMP Purge the pump and system if any noxious products have been pumped Isolate pump drive unit from all power and control supplies Close pipework valves to isolate the pump Disconnect the pump from the drive unit Before starting to dismantle the pump ALWAYS 16 ...

Page 25: ...lberesidualpressure in the system 2 Remove the front cover nuts followed by the cover 3 Slacken and remove the rotor retention discs 4 To assist extraction of the rotors insert a radiused end tool into the front recess of the rotor 5 Flushouttherotorcasebeforecontinuing Removing the Rotorcase Removing the Rotorcase Removing the Rotorcase Removing the Rotorcase Removing the Rotorcase Pumps fitted w...

Page 26: ...will face the sealed liquid a firm uniform pressure should be exerted preferably by means of an arbour press in combination with a suitable tool The diameter of the tool should be 0 1 0 4mm smaller than the housing diameter Care must be taken to ensure the seal does not enter the recess in a tilted position as this will cause damage to the seal 6 Smear the sealing lip with clean grease 7 Pass the ...

Page 27: ... Cover 1 3 Screw Valve Locking Nut 9 and Guide 8 onto the Valve Shaft 10 4 Push in and turn the assembly into the front cover 1 Setting the Valve Setting the Valve Setting the Valve Setting the Valve Setting the Valve Runthepump applyingpressuretothesystem If the Valve relieves at too low a pressure increase the spring tension by winding in the handwheel Alternatively should the Valve relieve at t...

Page 28: ...ly over the shaft sleeves Adjusting the Packed Gland DRIP LEAKAGE IS ESSENTIAL TO PREVENTOVERHEATINGOFTHEGLAND AREA WHICH WILL CAUSE SEAL FAILURE 1 Lightly tighten up the gland follower 2 Floodthepumpheadanddetermineifthe gland leakage is acceptable Tighten the gland follower nuts until an acceptable leakage is achieved 3 Start the pump and allow to run for 10 minutes Iftheglandbecomessignificantl...

Page 29: ...ationary sealing face still within its bore taking care not to chip the face 3 Carefully remove the remaining part of the seal from the shaft Fitting the Single Mechanical Seal 1 Using a solvent cleaner wipe the lapped surface of the seal faces until perfectly clean 2 Lubricate the O ring and shaft end with a silicon grease food quality if necessary 3 Firmly press the stationary face O ring onto t...

Page 30: ...Operating Manual 9 0 Faults Causes and Remedies 9 0 Faults Causes and Remedies 9 0 Faults Causes and Remedies 9 0 Faults Causes and Remedies 9 0 Faults Causes and Remedies 22 ...

Page 31: ...ol Alpha SP150 Mobil Gear 629 Shell Omala 150 Texaco Meropa 150 Esso Spartan EP150 Oil Filling Fill with oil through the filler plug on top of the gearbox to the level plug on the side of the gearbox Oil Changing The oil must be changed with the pump static First change should be after 150 hours of operation thereafter every 3000 hours of operation or a period of 2 years whichever is the soonest 1...

Page 32: ...w Gearcase Cover 4 14 Bearing Duplex 2 15 Cover Gearcase 1 16 Retainer Bearing 2 17 Gear Timing 2 18 Key Gear 2 19 Lip Seal Drive End 1 20 Rotor Roloid Gear 2 21 Screw Disc Retention 2 22 Disc Rotor Retention 2 23 Nut Closed 3 24 Cover Rotorcase 1 25 Rotorcase 1 26 Dowel 2 27 Gland Packing 2 Packs 28 Gland Follower 2 29 Nut Gland Stud 4 30 Lip Seal Gland End 2 31 Stud Gland 4 32 Gearcase 1 33 Scre...

Page 33: ...3 13 13 13 17 17 17 17 17 18 18 18 18 18 9 9 9 9 9 12 12 12 12 12 11 11 11 11 11 14 14 14 14 14 15 15 15 15 15 26 26 26 26 26 27 27 27 27 27 29 29 29 29 29 28 28 28 28 28 31 31 31 31 31 30 30 30 30 30 32 32 32 32 32 34 34 34 34 34 33 33 33 33 33 35 35 35 35 35 25 25 25 25 25 24 24 24 24 24 23 23 23 23 23 19 19 19 19 19 16 16 16 16 16 10 10 10 10 10 6 6 6 6 6 4 4 4 4 4 24 ...

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Page 36: ... Ltd Birch Road Eastbourne East Sussex BN23 6PQ England Tel 44 0 1323 412555 Fax 44 0 1323 414515 www ssppumps com The information contained herein is correct at the time of issue but may be subject to change without prior notice ...

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