Start-Up - Seko SPRING Manuel D'installation

 dampers with diaphragm or bag which separates gas/air from process liquid; they are generally precharged at
a pressure equal to 60÷75% of the maximum operating pressure of the pump when installed on the discharge
side of the pump.
These dampers require periodic checks to verify diaphragm/bag integrity and correct precharge pressure; they
must be selected considering the chemical compatibility of the construction material of diaphragm/bag.
If the pump discharges into a pressurized line, the installation of a non-return valve is recommended.

When installing pump and accessories it is recommended the installation of check valves in order to facili-
tate maintenance operations. Fig. 13 shows a typical installation.

Please observe the following instructions when pumping liquids that tend to cristallize 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

design suction and discharge lines should permit complete emptying

3. START-UP

Electrical connection:
 connect electric motor to mains (power source)
 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 pumphead for the correct filling of the hydraulic liquid

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 (see para 1.3.1)

start the pump without discharge pressure and increase progressively the flow rate up to 100%

keep the pump in operation for few minutes
WARNING
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 recom-
mended in order to check that the actual pressure at the start-up doesn't exceed the maximum allow-
able pressure.

pumps are self-priming, however some priming problem could be encountered with pumps having very low
flow rate, small plunger diameter, with back pressure valves installed and in presence of high discharge
pressure. In these cases it could be necessary to aid priming purging air from pumphead and suction line.
WARNING
If the pumped liquid is toxic, poisonous, aggressive, flammable or for any reason dangerous,
use particular care avoiding accidental leakages through gaskets or pipes during start-up or
maintenance operations.
Moreover follow all the recommendations of the manufacturer for handling and the
laws relevant to safety during handling and disposal of dangerous substances.
SPR0136001 Rev. 2.4 EN
local
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