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PUMP TROUBLESHOOTING

BROKEN SHAFT

Probable Cause



Foreign objects entering the pump.



Viscosity too high for the pump speed.



Relief valve not opening.



Hydraulic hammer - pressure spikes.



Pump/driver,

driveline/drive shaft misalignment.



Excessively worn vanes or vane slots.



Settled or solidified material in the pump at start-up.



Overtightened V-belts, if used.

SEAL LEAKAGE

Probable Cause



O-rings not compatible with the liquids pumped.



O-rings nicked, cut or twisted.



Shaft at seal area damaged, worn or dirty.



Excessive

cavitation.



Mechanical seal faces cracked, scratched, pitted or dirty.



Ball bearings overgreased.

MOTOR OVERLOAD

Probable Cause



Horsepower of motor not sufficient for application



Improper wire size / wiring and/or voltage to motor.



Misalignment in pump drive system.



Bearing locknuts adjusted improperly.



Excessive

viscosity,

pressure or speed.



Faulty or worn bearings.



Rotor rubbing against head or liner.



Dirty mechanical seal faces.

1809 Century Avenue, Grand Rapids, Michigan 49503-1530 U.S.A.

Telephone: (616) 241-1611 • Fax: (616) 241-3752

E-mail: blackmer @blackmer.com • Internet Address: www .blackmer.com

Содержание XL2B

Страница 1: ... inch 107 B01 107 B02 SAFETY DATA This is a SAFETY ALERT SYMBOL When you see this symbol on the product or in the manual look for one of the following signal words and be alert to the potential for personal injury death or major property damage Warns of hazards that WILL cause serious personal injury death or major property damage Warns of hazards that CAN cause serious personal injury death or ma...

Страница 2: ...ference If replacement parts are needed or if information pertaining to the pump is required this data must be furnished to a Blackmer representative TECHNICAL DATA 2 3 inch 4 inch Maximum Pump Speed 780RPM 640 RPM Maximum Operating Temperature 240 F 115 C Maximum Differential Pressure 150 psi 10 3 Bar Maximum Working Pressure 350 psi 24 1 Bar Technical Data is for standard materials of constructi...

Страница 3: ...t elevated temperature provisions should be made to compensate for expansion and contraction of the pipes especially when long pipe lines are necessary Steel pipe expands approximately 3 4 1 9 cm per 100 feet 30 49 m per 100 F 37 8 C rise in temperature PUMP MOUNTING A solid foundation reduces noise and vibration and will improve pump performance On permanent installations it is recommended the pu...

Страница 4: ...ry death or major property damage Hazardous pressure can cause personal injury or property damage Failure to relieve system pressure prior to performing pump service or maintenance can cause personal injury or property damage Hazardous pressure can cause personal injury or property damage Pumps operating against a closed valve can cause system failure personal injury and property damage Hazardous ...

Страница 5: ... within the expected conditions Record pressures in the Initial Start Up Information section 3 Check for leakage from the piping and equipment 4 Check for overheating excessive noise or vibration of the pump reducer and motor 5 Check the flow rate to ensure the pump is operating within the expected parameters Record flow rate in the Initial Start Up Information section 6 Check the pressure setting...

Страница 6: ...sure control valve XL series pumps are fitted with an internal pressure relief valve that bypasses back to the suction side of the pump Pumping volatile liquids under suction lift may cause cavitation Partial closing of the discharge valve WILL result in internal relief valve chatter and is NOT recommended For these applications install an external system pressure control valve and any necessary b...

Страница 7: ... avoid possible entanglement in moving parts do not lubricate pump bearings gear reducer or any other parts while the pump is running NOTICE If pumps are repainted in the field ensure that the grease relief fittings 76A are functioning properly after painting Do NOT paint them closed Remove any excess paint from the fittings Pump bearings should be lubricated every one to twelve weeks AT MINIMUM d...

Страница 8: ...or damage and replace as required c Repeat steps a and b on the opposite shaft end 6 Remove the head capscrews 21 Gently pry the head away from the casing using two large screwdrivers The head O ring should come off with the head assembly 7 Slide the head and O ring off the shaft The bearing 24 mechanical seal stationary seat and stationary O ring 153A 153D will come off with the head assembly a O...

Страница 9: ...bottom vanes and push rods are installed carefully insert the non driven end of rotor and shaft into the casing d Install the remaining vanes into the top positions of the rotor 7 DISC 2 and 3 inch Models Install the disc 71 on the inboard side of the pump with the seal cavity facing outward and the disc relief hole located as shown in Figure 6 Figure 6 Disc Relief Hole Location 2 and 3 inch Model...

Страница 10: ...he head capscrews to 30 lbs ft 40 7 Nm alternating between one side of the head and the other Frequently check that the shaft still turns freely If tight loosen the capscrews and repeat the procedure If the shaft continues to bind check for grease or dirt on the mechanical seal faces Figure 9 Locknut Assembly 20 LOCKNUT ADJUSTMENT It is important that the bearing locknuts 24A and lockwashers 24B b...

Страница 11: ...uide 7 against the valve c Attach a new relief valve O ring 10 and the valve cover 4 on the cylinder d Screw the relief valve adjusting screw 2 with locknut 3 into the valve cover 4 until it makes contact with the spring guide 7 e After the relief valve has been adjusted tighten the Locknut 3 and install the relief valve cap 1 and O ring 88 NOTICE The relief valve setting MUST be tested and adjust...

Страница 12: ...otor and brake windings to verify the integrity of the winding insulation and inspect all terminal box openings and wire connection areas to verify that all components are dry and free of corrosion Long Term Storage By taking special precautions problems such as seal leakage and reducer failure due to the lack of lubrication improper lubrication quantity or contamination can be avoided The followi...

Страница 13: ...alphaolefin Oil FG Food Grade Oil NOTICE The Ambient Temperature is intended to be an operation guideline based upon the typical properties of all the lubricant The viscosity and other properties of the lubricant change based upon load speed ambient conditions and reducer operating temperatures The user should consult with their lubrication supplier NORD gear before considering changes in oil type...

Страница 14: ...Liquids that set up when inactive OVERHEATING Probable Cause Corrective Action Continual full bypassing of the liquid Adjust the relief valve such that the pump will not bypass during normal operation WARNING Internal bypassing of liquid elevates the liquid temperature The internal bypass valve should only be used for brief periods and at differential pressures below 125 psi For extended periods o...

Страница 15: ...rn vanes discs or rotor Bearing Worn or Damaged Loose or improperly installed piping Misalignment of pump and driver or bent shaft Pump base not properly mounted Insufficient Oil in the Gear Reducer POOR OR NO PRIMING Probable Cause Air leaks in the suction line Valve partially closed or other restriction in the suction line Damaged or worn pump parts Too much lift for the vapor pressure of the fl...

Страница 16: ...cked cut or twisted Shaft at seal area damaged worn or dirty Excessive cavitation Mechanical seal faces cracked scratched pitted or dirty Ball bearings overgreased MOTOR OVERLOAD Probable Cause Horsepower of motor not sufficient for application Improper wire size wiring and or voltage to motor Misalignment in pump drive system Bearing locknuts adjusted improperly Excessive viscosity pressure or sp...

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