Flowserve Centrifugal Pump M-TN User Instructions Download

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MHP-TN USER INSTRUCTIONS ENGLISH 71576313 - 02/07

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7 FAULTS; CAUSES AND REMEDIES

Insufficient flow rate
Irregular pump running
Driver overloaded
Mechanical seal leak
Equipment vibration
Excessive pump casing temperature

POSSIBLE CAUSES

SOLUTIONS

 

Pump or suction pipe not completely filled

- Check and complete filling

 



Air bubbles in pipes

- Check and desecrate the pipes



 

Suction level too low

- Check: the available NPSH > the required NPSH
- Reduce geometrical suction lift
- Reduce head losses in pipes and in fittings (diameter increase

and appropriate fitting positions)

- Check valves and strainers
- Check the immersion head of the suction valve



Wrong rotation

- Reverse 2 phases on motor terminal boxes

  

The motor is running on 2 phases only

- Check and control the motor electrical power supply



Motor running too low

- Check the connection in the terminal box according to the

voltage



Total manometric head system higher than
pump differential head

- Check the discharge head
- Check the head losses in discharge pipes (partly closed valve,

foreign particles, back pressure too high)

- Modify the installation or change the pump set



Total manometric head system lower than
pump differential head

-Throttle at discharge valve or trim the impeller (contact our

local agent): CONSULT FLOWSERVE



 

Pipes (valves, filter...)

- Control, dismantle and clean

 

Insufficient flow rate

- Check the suction and discharge pipes (valves, back

pressure)



Worn wear-ring surfaces

- Foresee pump mending. CONSULT FLOWSERVE

   

Seizure, jamming

- CONSULT FLOWSERVE

   

Excessive strains on flanges

- Check the flange connections and eliminate strains (pipe

positioning or elastic sleeves mounting)



Defective gland packing on the shaft

- Check and replace all the gland-packing parts.
- Mechanical seal: CONSULT FLOWSERVE

   

Defective motor bearings

- CONSULT FLOWSERVE



Specific gravity or viscosity of liquid too high

- Consult our local agent to analyze the problem



Misalignment

- Check the alignment of the pump and of its driver



Foundations not sufficiently rigid

- Check the setting of base plates: tightening, bad adjustment,

seal

Insufficient pressure

Pump looses prime after starting

POSSIBLE CAUSES

SOLUTIONS



Rotation speed too low (check the driver)

- Check the connection in the terminal box according to the

voltage

 

Presence of air

- Check and de-aerate



Suction pressure insufficient

- Check: the available NPSH > the required NPSH



Mechanical defects

- CONSULT FLOWSERVE



Air leak in the suction pipe

- Check suction pipe is airtight



Restriction in suction pipe

- Check diameter of suction pipe



Suction level too low

- Check the NPSH >NPSH
- Reduce geometrical suction lift
- Reduce head losses in pipes and in fittings (diameter increase

and appropriate fitting positions)

- Check valves and strainers
- Check the immersion head of the suction valve



Obstruction of suction pipe

- Check condition of pipe



Defective gland packing on the shaft

- Check and replace all the gland packing.
- Mechanical seal: CONSULT FLOWSERVE



Defective gasket

- CONSULT FLOWSERVE

Summary of Contents for Centrifugal Pump M-TN

Page 1: ...fugal pump Single stage axial suction vertical discharge type centrifugal pump PCN 71576313 02 07 E Installation Operation Maintenance These instructions must be read prior to installing operating using and maintaining this equipment ...

Page 2: ... 6 Electrical connections 16 4 7 Final shaft alignment check 17 4 8 Protection systems 17 5 COMMISSIONING START UP OPERATION AND SHUTDOWN 17 5 1 Direction of rotation 17 5 2 Guarding 17 5 3 Priming and auxiliary supplies 17 5 4 Starting the pump 18 5 5 Running the pump 19 5 6 Stopping and shutdown 20 5 7 Hydraulic mechanical and electrical duty 20 5 8 Pumps for Food Use or Potable Water 21 Page 6 ...

Page 3: ...al and electrical duty 5 7 20 Inspection 6 2 2 and 6 2 3 22 Installation 4 13 Internal coating 6 2 5 23 Lifting 2 3 10 Location 4 1 13 Maintenance 6 21 Maintenance schedule 6 2 22 Nomenclature 3 2 11 Nameplate 1 7 1 8 Operating limits see 3 1 12 Ordering spare parts 6 3 1 24 Parts lists 8 2 27 Piping 4 5 15 Protection systems 4 8 17 Pump masses 2 2 2 10 Receipt and unpacking 2 1 10 Recommended spa...

Page 4: ...ere applicable this document incorporates information relevant to these Directives and Approvals To confirm the Approvals applying and if the product is CE marked check the serial number plate markings and the Certification See section 9 Certification 1 3 Disclaimer Information in these User Instructions is believed to be reliable In spite of all the efforts of Flowserve Corporation to provide sou...

Page 5: ...ons and health and safety personnel and follow all plant safety requirements and applicable safety and health laws and regulations 1 6 3 Safety action This is a summary of conditions and actions to prevent injury to personnel and damage to the environment and to equipment For products used in potentially explosive atmospheres section 1 6 4 also applies NEVER DO MAINTENANCE WORK WHEN THE UNIT IS CO...

Page 6: ...stability and cavitation vibration 1 6 4 Products used in potentially explosive atmospheres The following instructions for pumps and pump units when installed in potentially explosive atmospheres must be followed to help ensure explosion protection The terminology and procedures ensure that the installed pump is in compliance with the European Directive 94 9 EC known as the ATEX Directive which is...

Page 7: ...d when the liquid temperature varies and the pump could be installed in different hazardous atmospheres In this case the user is responsible for ensuring that the pump surface temperature does not exceed that permitted in the particular hazardous atmosphere If an explosive atmosphere exists during the installation do not attempt to check the direction of rotation by starting the pump unfilled Even...

Page 8: ...nd ancillary systems Where there is the potential hazard of a loss of a seal barrier fluid or external flush the fluid must be monitored If leakage of liquid to atmosphere can result in a hazard the installation of a liquid detection device is recommended 1 6 4 7 Maintenance to avoid the hazard CORRECT MAINTENANCE IS REQUIRED TO AVOID POTENTIAL HAZARDS WHICH GIVE A RISK OF EXPLOSION The responsibi...

Page 9: ... Flowserve or a noise specialist if assistance is required in combining the values It is recommended that where exposure approaches the prescribed limit then site noise measurements should be made The values are in sound pressure level LpA at 1 m 3 3 ft from the machine for free field conditions over a reflecting plane For estimating sound power level LWA re 1 pW then add 17 dBA to the sound press...

Page 10: ...ng Boxes crates pallets or cartons may be unloaded using forklift vehicles or slings dependent on their size and construction See 2 3 1 for positioning of slings To lift heavy pieces above 25 kg 55 lb use a winch adapted to the mass and in accordance with the current local regulations To lift machines or pieces with one or several suspension rings only use hooks and chains in compliance with the l...

Page 11: ...azardous substances or toxic fluid are disposed of safely and that the correct personal protective equipment is used The safety specifications must be in accordance with the current regulations at all times 3 PUMP DESCRIPTION 3 1 Configurations The centrifugal motor pump is designed for the pumping of cold water or all clear liquids which are not solid and liquid mixtures non corrosive non abrasiv...

Page 12: ...ow Each pump is supplied with the following nameplate Each pump unit is supplied with the following nameplate Mass of the set 3 3 Coverage charts 3 3 1 2900 min 1 50 Hz coverage charts Q H Pump type Speed of rotation Flow rate Year of construction Manufacture number Head Radial thrust bearing Mass Maximum admissible Pressure at 20 C 68 F Maximum minimum temperature ...

Page 13: ...distorted or pulled down onto the surface of the foundation but should be supported to maintain the original alignment Anchor bolts must be in accordance with the foot bolt holes Use anchor bolts of accepted standards and sufficient to ensure a secure fitting in the foundation Particularly this applies to individual plates where the anchor bolts have to withstand the driving torque NF E 27 811 Pro...

Page 14: ...ecked immediately 4 4 2 Alignment methods Ensure pump and driver are isolated electrically and the half couplings are disconnected Ensure that the pump pipework suction and discharge is disconnected The alignment MUST be checked Although the pump will have been aligned at the factory it is most likely that this alignment will have been disturbed during transportation or handling If necessary align...

Page 15: ... due to internal pressure may act on the pump flange Maximum forces and moments allowed on the pump flanges vary with the pump size and type These external strains may cause misalignment hot bearings worn couplings vibrations and the possible failure of the pump casing When designing the pipes 4 5 2 1 4 5 2 2 4 5 3 1 take necessary precautions in order not to exceed maximum allowed strains Forces ...

Page 16: ...ometer pressure gauge can be connected on the piping Control manometer Do not tighten flanges before the final check see 4 5 4 4 5 4 Final checks a Check the tightening of anchor bolts Tighten them if necessary b Check that protective covers on suction and discharge flanges are removed c Check that holes of piping flanges are parallel and correspond to those of the pump d Tighten suction and disch...

Page 17: ...ystem is installed To prevent excessive surface temperatures at bearings it is recommended that temperature or vibration monitoring are carried out See sections 5 5 3 and 5 5 4 If a defect of cooling can lead to temperature higher than those acceptable a system of cooling surveillance must be installed Except when explicitly required by the customer in the specifications when a possibility of reve...

Page 18: ...foot valve seat and shutter 5 4 Starting the pump 5 4 1 Bring controls and preparation before the first starting and after each service call Necessarily a Check the tightening of the different plugs b Check that the gland lightly tightens the packing rings c Risk of seal ring overheating d Check the direction of rotation of the motor Refer to the rotation arrow of the pump e Install all protection...

Page 19: ... WHEN THE PUMP IS RUNNING If hot or freezing components of the machine can present a danger to operators they must be shielded to avoid accidental contact If a 100 protection is not possible the machine access must be confined to the maintenance staff only If the temperature is greater than 80 C 176 F a warning plate must be clearly placed on the pump It is strictly forbidden to open switch cupboa...

Page 20: ...the inlet valve e Switch off external power supply flushing quench cooling liquid 5 6 3 Shutdown 1 month a Isolate motor b Avoid reverse rotation of the pump c Make sure that the discharge line pressure does not reach the foot valve d Close the outlet valve Eventually close the inlet valve e Switch off external power supply flushing quench cooling liquid f Keep the pump fully filled with water In ...

Page 21: ...tion it must not be used for these types of applications If it has been ordered for this type of application the following recommendations are to be followed 5 8 1 Cleaning prior to operation Pumps that are to be used for a food or drinking water application should be cleaned before being put into initial operation and after the installation of spare parts that are in contact with the liquid Clean...

Page 22: ...ty condition is in the safe operating range for the pump i Check vibration noise level and surface temperature at the bearings to confirm satisfactory operation j Check the tightness of the connections k Check dirt and dust is removed from areas around close clearances bearing housings and motors l Check coupling alignment and re align if necessary m Verify the correct operation of the system The ...

Page 23: ...al diameter is lightly tightened and there is an initial gap between the sleeve and the packing ring For that purpose wind the packing helically around the shaft sleeve or a chuck of the same diameter Take precautions to avoid damaging sleeve Example of straight cut Example of bevel cut Ensure a tightening on the stuffing box housing and not on the sleeve SETTING OF PACKING Follow the instructions...

Page 24: ... any removal from the shaft c After serving during two years replace the gland packing 6 5 Disassembly Refer to section 1 6 Safety and section 6 Maintenance before dismantling the pump Before dismantling the pump for overhaul ensure genuine Flowserve replacement parts are available Refer to sectional drawings for part numbers and identification REPAIR OF THE PUMP If the pump presents abnormalities...

Page 25: ...and discharge pipes valves back pressure Worn wear ring surfaces Foresee pump mending CONSULT FLOWSERVE Seizure jamming CONSULT FLOWSERVE Excessive strains on flanges Check the flange connections and eliminate strains pipe positioning or elastic sleeves mounting Defective gland packing on the shaft Check and replace all the gland packing parts Mechanical seal CONSULT FLOWSERVE Defective motor bear...

Page 26: ...MHP TN USER INSTRUCTIONS ENGLISH 71576313 02 07 Page 26 of 28 flowserve com 8 PARTS LIST AND DRAWINGS 8 1 Sectional drawings 9331 ...

Page 27: ...s determined from the Contract requirements are provided with these instructions where applicable Examples are certificates for CE marking ATEX marking etc If required copies of other certificates sent separately to the Purchaser should be obtained from the Purchaser for retention with these User Instructions 10 OTHER RELEVANT DOCUMENTATION AND MANUALS 10 1 Supplementary User Instructions Suppleme...

Page 28: ...4 Pantech 21 Singapore 128388 Telephone 65 6775 3003 Fax 65 6779 4607 Local Flowserve factory representatives North America Flowserve Pump Division 5310 Taneytown Pike PO Box 91 Taneytown MD 21787 0091 USA Telephone 1 410 756 2602 Customer Service FAX 1 410 756 2615 Parts inquiry Order PH 1 800 526 3569 South America Flowserve do Brasil Ltda Av Don Helder Camara 5451 20771 001 Rio de Janerio Brasi...

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