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105-B00     Page 6/16 

START UP PROCEDURES 

NOTICE: 

Consult the "General Pump Troubleshooting" section of 
this manual if difficulties during start up are experienced. 

1.  Start the motor. Priming should occur within one minute. 
2.  Check the suction and discharge pressure to see if the 

pump is operating 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 of the relief valve by briefly 

closing a valve in the discharge line and reading the 
pressure gauge. This pressure should be 20 psi (1.4 bar) 
higher than the maximum operating pressure.   

Do not run the pump for more than 10-15 seconds 
with the discharge valve completely closed. 

If adjustments need to be made, refer to "Relief Valve 
Setting & Adjustment." 

 

 

Incorrect settings of the pressure relief 
valve can cause pump component 
failure, personal injury, and property 
damage. 

 

Hazardous pressure 

can cause personal 

injury or property 

damage 

 
 

RUNNING THE PUMP IN REVERSE 
ROTATION 

NOTICE: 

Pump should be operated in reverse rotation for no more 
than 10 minutes and only when a separate pressure relief 
valve is installed to protect the pump from excessive 
pressure. 

It may be desirable to run the pump in reverse rotation for 
system maintenance.  The pump will operate satisfactorily in 
reverse rotation for a LIMITED time, 

at a reduced 

performance level. 

 

FLUSHING THE PUMP 

NOTICE: 

If flushing fluid is to be left in the pump for an extended 
time, it must be a lubricating, non-corrosive fluid.  If a 
corrosive or non-lubricating fluid is used, it must be 
flushed from the pump immediately. 

1.  To flush the pump, run the pump with the discharge 

valve open and the intake valve closed.  Bleed air into 
the pump through the intake gauge plug hole or through 
a larger auxiliary fitting in the intake piping.  Pump air 
for 30 second intervals to clean out most of the 
pumpage. 

2.  Run a system compatible flushing fluid through the 

pump for one minute to clear out the remainder of the 
original pumpage.  The valve in the discharge line 
should be restricted to build up 10 psi (0.7 bar) to force 
flushing liquid through the bearing seal chamber. 

3.  To remove the flushing fluid, follow step 1 above. 

NOTICE: 

After flushing the pump some residual fluid will remain 
in the pump and piping. 

NOTICE: 

Properly dispose of all waste fluids in accordance with 
the appropriate codes and regulations. 

 
 

PUMP RELIEF VALVE 

NOTICE: 

The pump internal relief valve is designed to protect the 
pump from excessive pressure and must not be used as 
a system pressure control valve.

 

XLW 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 bypass piping, back to the 
storage tank. 

A system pressure control valve is also recommended when 
operating for extended periods (more than 15 seconds) 
against a closed discharge valve.

 

 

Summary of Contents for XLW2E-N

Page 1: ...r by contacting Blackmer Customer Service 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 persona...

Page 2: ...ace Hazardous pressure can cause personal injury or property damage PUMP DATA PUMP IDENTIFICATION A pump Identification tag containing the pump serial number I D number and model designation is attached to each pump It is recommended that the data from this tag be recorded and filed for future reference If replacement parts are needed or if information pertaining to the pump is required this data ...

Page 3: ...larly to avoid pump starvation 4 The intake system must be free of air leaks 5 Expansion joints placed at least 36 0 9m from the pump will compensate for expansion and contraction of the pipes Contact the flexible connector hose manufacturer for required maintenance care and design assistance in their use 6 Install pressure gauges in the NPT ports provided in the pump casing to check pump at start...

Page 4: ...ent is required The motor gearbox and pump are rigidly connected with bolted flange connections These flanges ensure the motor shaft gearbox shafts and pump shaft are aligned correctly without the need for manual alignment However due to variations in base and foundation geometry the unit will require shimming to reduce stress on the gearbox and pump adapter See PRESTART CHECKLIST section for deta...

Page 5: ... motor until it is unsupported 3d Try pulling out each of the shims while noticing the the pull tension 3e If the shims closest to the motor shaft easily pull out increase the shim thickness the same at all locations and recheck 3f If the shims furthest from the motor shaft easily pull out decrease the shim thickness the same at all locations and recheck 3g The unit is properly shimmed when all 4 ...

Page 6: ... LIMITED time at a reduced performance level FLUSHING THE PUMP NOTICE If flushing fluid is to be left in the pump for an extended time it must be a lubricating non corrosive fluid If a corrosive or non lubricating fluid is used it must be flushed from the pump immediately 1 To flush the pump run the pump with the discharge valve open and the intake valve closed Bleed air into the pump through the ...

Page 7: ...ause shock burns or death Hazardous voltage Can shock burn or cause death 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 Disconnecting fluid or pressure containment components during pump operation can cause serious personal injury death or major property...

Page 8: ... Slide the lockwasher off the shaft Inspect the lockwasher for 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 stationa...

Page 9: ... 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 Models 8 ME...

Page 10: ...ght loosen the capscrews and repeat the procedure If the shaft continues to bind check for grease or dirt on the mechanical seal faces Figure 8 Locknut Assembly 20 LOCKNUT ADJUSTMENT It is important that the bearing locknuts 24A and lockwashers 24B be installed and adjusted properly Overtightening locknuts can cause bearing failure or a broken lockwasher tang Loose locknuts will allow the rotor to...

Page 11: ...e 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 adjusted more precisely before putting the pump into service Refer to Relief Valve Setting and Adjustment Operation without guards in place can cause serious personal injury major property damage or death Do not operat...

Page 12: ...r 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 following ...

Page 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...

Page 14: ...nter the rotor and shaft between the heads Refer to Locknut Installation on Page 10 Contaminated mechanical seal faces Any trace of grease or dirt on the seal faces will prevent the faces from mating properly causing the rotor and shaft to bind or turn hard Use a tissue paper alcohol to clean the seal faces NOTE Apply a light oil or suitable lubricant to bronze seal faces only OTHER POSSIBLE CAUSE...

Page 15: ...y closed valves Excessive amount of elbows Suction lift too great Pump speed too high for the viscosity of the liquid being pumped Entrained air or vapors in the pump Check pipe joints for leakage of air Sometimes when recirculating liquid in a tank the returning liquid falling through the air carries air down into the tank which eventually gets back into the pump Pump speeds exceed the recommende...

Page 16: ...t 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 Cau...

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