Discharge Line; Start-Up - Seko MSA Serie Manual De Instalación

2.4 Discharge line

The discharge pressure should be larger than the max rated working pressure of pump.
It is very important to prevent the air entering into the discharge line.
The flow rate can be controlled only when the discharge pressure is larger than the suction
pressure.
Please observe the following instructions when pumping liquids that tend to crystallize or
suspensions that tend to sediment:
Keep suspension correctly agitated in order to prevent sedimentation
Avoid installation of vertical lines over the pump discharge nozzle
Before stopping the pump start a washing cycle of the pump and pipes
Designing suction and discharge lines should permit complete emptying

3. Start-up

Connect the motor to power supply.
Check the direction of rotation of the electric motor; an arrow on the electric motor shows the
correct direction of rotation
The electric motor should be connected by qualified personnel only!
WARNING:
Don't start the pump with the suction and/or discharge check valves closed
Don't close check valves while the pump is in operation
Before starting the pump check the following points:
Check mechanism for the correct oil filling
•
Check metering pump for overpressure protection (pressure relief valve installation)
•
Verify that all hydraulic connections are correctly tight
•
Position adjustment knob at "zero" flow rate
•
Start the pump without discharge pressure and increase progressively the flow rate up to 100%
•
Check if there is bubble in the pump chamber.
•
WARNING 1
DON'T EXCEED THE MAXIMUM PERFORMANCE STENCILLED ON THE PUMP LABEL, If no
pressure gauge is fitted on the plant, the installation of a temporary pressure gauge is
recommended in order to check that the actual pressure at the start-up doesn't exceed the
maximum allowable pressure.
WARNING 2
If the pumped liquid is toxic, poisonous, aggressive, flammable or for any reason
dangerous, use particular care avoiding accidental leakages
during start-up or maintenance operations.
Moreover follow all the recommendations of the manufacturer for handling and the local
laws relevant to safety during handling and disposal of dangerous substances.
SPR0136037 Rev. 1.5
through gaskets or pipes
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