Flowserve ME - Manual (Page 23)

ME USER INSTRUCTIONS ENGLISH 71576287 - 02/13
Page 23 of 36 flowserve.com
5.5 Running the pump
5.5.1 Venting the pump
Vent the pump to enable all trapped air to
escape taking due care with hot or hazardous
liquids.
Under normal operating conditions, after the pump
has been fully primed and vented, it should be
unnecessary to re-vent the pump.
5.5.2 Pump fitted with a stuffing box
If the pump has a packed gland there must be some
leakage from the gland. Gland nuts should initially
be finger tight only. Leakage should take place soon
after the stuffing box is pressurized. If no leakage
takes place the packing will begin to overheat. If
overheating takes place the pump should be
stopped and allowed to cool before being restarted.
When the pump is restarted it should be checked to
ensure leakage is taking place at the packed gland.
When adjusting an operating stuffing box
(shield grids removed for this operation) the operator
must be very careful. Safety gloves are compulsory
and loose clothes are not allowed (above all to the
arms) to avoid being caught by the pump shaft.
The pump should be run for ten minutes with steady
leakage and the gland nuts tightened by 10 degrees
at a time until leakage is reduced to an acceptable
level. The temperature of the gland should be
checked after each round of tightening.
If the temperature starts to climb rapidly then back
off the gland nuts until the temperature drops down.
Wait for the temperature to stabilize before
tightening again. The leakage must not be reduced
below a rate of 20 drops per minute. Bedding in of
the packing may take several hours.
Shield grids being removed during installation
of the gland packing, it must be ensured that they
are replaced as soon as this operation is completed.
5.5.3 Pump fitted with mechanical seal
A mechanical seal ensures a seal without leakage
and does not need any adjustment. Nevertheless if a
light leakage occurs during start-up, it should
disappear after the initial running in of the friction
faces.
Mechanical Seal
For ME 150-200,
200-250, 200-315
200-355, 250-250
250-315, 300-300
Simple mechanical
seal
Others ME
Balanced
mechanical seal
Others ME
NEVER RUN A MECHANICAL SEAL
DRY, EVEN FOR A SHORT WHILE.
SAFETY INSTRUCTIONS WHEN THE PUMP IS
RUNNING:
If hot or freezing components of the machine
can present a danger to operators, they must be
shielded to avoid accidental contact. If a 100 %
protection is not possible, the machine access must
be confined to the maintenance staff only.
If the temperature is greater than 80 °C (176
°F), a warning plate must be clearly placed on the
pump.