Operation
Preparing for initial start-up
760.0002 GB - 150 500
BA-2011.11
Series AE1F, AE1L, AE.E, AE.N, AE.H, AE.V, AED1E,
AED2N ID, ZD construction types
19
The buffering liquid pressure must be
approximately 1.5 to 2 bar above the pressure
in the suction casing. The flow volume must be
regulated so that the outlet temperature does
not exceed approximately 60 °C and is thereby
at least 30 K below the boiling point at
operating pressure. The temperature
difference between inlet and outlet may be no
more than 15 K. (Buffering liquid Section
7.1.3 page 19).
• Supplying the single-acting mechanical
seal with quench (versions G0Q and
G1Q).
The space between the counter ring and the
shaft sealing ring must be charged with
quench liquid. The maximum permissible
pressure differential between the quench liquid
and pressure in the suction casing is p=0.5
bar.
Max. quench liquid pressure is 3 bar. (Quench
liquid Section 7.1.3 page 19).
7.1.3 Quality and properties of the
flushing/buffering and quench
liquids
Any liquid can be used as buffering/flushing or
quench liquid that does not violate the
corrosion resistance of any contacted parts
and that is compatible with the liquid being
sealed.
Caution!
The liquid must be free of solids, it
may not tend to form deposits,
should have the lowest boiling point
possible, have a good ability to
conduct heat, and have low
viscosity.
Clean, medium-hardness water fulfills these
requirements.
7.1.4 Switching on additional
equipment for heating or
cooling the stuffing box
casing and/or the stator
and/or the suction casing
(jacketed casing)
If the pumps are equipped with this additional
equipment, all buffering equipment for heating
or cooling systems must be opened. The
downstream pressure and temperature limits
must be maintained.
► Supplying the cooled or heated stuffing
box casing and/or the stator and/or the
suction casing (jacketed casing) with
suitable liquid medium.
Warning!
Liquid may squirt out under high
pressure and result in danger.
Only liquids that do not violate the
corrosion resistance of all
contacted parts may be used as
heating or cooling liquids.
Maximum pressure of the heating or cooling
liquid is 6 bar. Maximum heating temperature
may not exceed 150 °C and cooling
temperature may not fall below 40 °C.
Notice!
Refer to the order data sheet for the
design temperature.
7.1.5 Pump rotation difficulties
When restarting the pump or starting after a
long period of downtime, make sure that the
drive machine turns the pump. If a high level of
adhesion between the rotor and stator in a
new/refurbished pump prevents this from
occurring normally, you can use a suitable
feather key to help move the drive shaft.
Caution!
Avoid damage to the drive shaft.
7.1.6 Checking the direction of
rotation
Viewed from the drive to the drive shaft, the
normal direction of rotation is to the left. The
suction connection is on the shaft seal side so
the shaft seal is balanced. In special cases the
pump will turn to the right, such as when
sucking from a vacuum or when pumping
liquids that do not tolerate any gas inclusions.
The suction and pressure sides are then
reversed.
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