BLACKMER SNP1.25, Installation, Operation And Maintenance Instructions

104-A00    Page 5/16 

OPERATION 

Do not operate 

without guard 

in place 

Operation without guards in place can 
cause serious personal injury, major 
property damage, or death. 

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 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  

PRE-START UP CHECK LIST 

1.  Check the alignment of the pipes to the pump.  Support 

pipes so that they do not spring away or drop down when 
pump flanges or union joints are disconnected. 

2.  Verify proper coupling alignment. 

3.  Blackmer helical gear reducers (if supplied) are shipped 

from the factory without oil in the gearcase. Fill with the 
grade of oil indicated on the reducer tag. For more 
specific instructions on Blackmer gear reducers, refer to 
the appropriate Gear reducer Installation, Operation and 
Instruction Manual. 

4.  Check the entire pumping system to verify that the 

proper inlet and discharge valves are fully open, and that 
the drain valves and other auxiliary valves are closed. 

5.  Install vacuum and pressure gauges on the pump in the 

1/4” NPT connections provided. These can be used to 
check actual suction and discharge conditions after 
pump start-up. 

6.  Check the wiring of the motor, and briefly turn on the 

power to make sure that the pump rotates in the 
direction of the rotation arrow. 

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 vacuum and pressure gauges to see if the 

pump is operating within the expected conditions. 

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.  

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

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

Hazardous pressure 

can cause personal 

injury or property 

damage 

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