Operation
Preparing for initial start-up
18
Series AE1F, AE1L, AE.E, AE.N, AE.H, AE.V, AED1E,
AED2N ID, ZD construction types
BA-2011.11
760.0002 GB - 150 500
7 Operation
7.1 Preparing for initial start-up
7.1.1 Filling the pump with liquid
Caution!
The pump may not run dry!
► The pump must be filled with
liquid before initial start-up or
when starting after a long
period of downtime.
Even just a few revolutions without liquid can
damage the stator. For this reason, the suction
casing must be filled with water or pumped
liquid before start-up in order to lubricate the
stator and rotor. Repeat the filling procedure
after long periods of downtime, i.e. when you
suspect that the residual fluid in the pump has
evaporated, or after repairs.
After filling, the pump will prime itself.
Ventilation is not necessary, because the
pump is able to immediately begin moving a
liquid/gas mixture.
7.1.2 Switching on additional
equipment for shaft seals (if
present)
If the pumps are charged with a flushing/buffer
liquid or quench liquid, the stop valves must be
opened and adjusted to the downstream
pressure before initial start-up of the pump.
• Supplying the stuffing box with flushing
or buffer liquid (versions P02, P12, P03,
P13, P04, and P14).
Notice!
Stuffing boxes with flushing ring or
seal chamber ring require a flushing
or buffering liquid to maintain
functionality.
The required flushing or buffer liquid pressure
on pumps with a stuffing box is as follows
(packing stuffing box version):
• P02/P12 = 0.1 to 0.5 bar (over internal
suction casing pressure),
• P03/P13 = 0.5 bar (over internal suction
casing pressure),
• P04/P14 = 0 to 0.5 bar
(flushing and buffering liquid, see
Section 7.1.3 page 19).
• Supplying the single-acting,
unbalanced mechanical seal with
throttle ring
(versions G0S/ G1S and G0T/G1T).
Notice!
To maintain functionality, these
mechanical seals require a flushing
liquid that carries off frictional heat
and limits the amount of pumped
liquid that can enter the seal
chamber.
The pressure of the flushing liquid must be
within the range of 0.1 and 0.5 bar above the
suction casing’s internal pressure. The
required flow of flushing liquid to carry off the
thermal power loss of the mechanical seal can
be retrieved from the table in section 9.1.7
page 25 (Flushing liquid Section 7.1.3 page
19).
• Supplying the double-acting
unbalanced mechanical seal (version
G0D/G1D).
Notice!
To maintain functionality, these
mechanical seals require a
buffering liquid that carries off
frictional heat and prevents the
pumped liquid from entering the
sealing clearance.
Caution!
Circulation of buffer liquid must be
ensured before each time the pump
is started.
Warning!
On buffering pressure systems,
make sure that the permissible
container pressure is not exceeded
( Manufacturer’s specifications).
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