Andritz SD 35 Series, Руководство по эксплуатации

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Series SD 35
23
ENGLI
S
H
• Check the alignment between pump and motor when operat-
ing horizontal pumps with flexible coupling (see para. 3.3.2).
• Check that the fastening bolts of pump and motor are secure.
• Check that the installation of the pump ensures easy access
to the functional controls.
• Check the non-return valve of pump on its tightness.
4.1.1 Bearings
See para. 5.2.1.
4.1.2 Shaft sealing
Observe any specific instructions, cross-sections, dimension
sheets or appendices.
4.1.2.1 Gland packing
• Use the loose gland packing which has been delivered along
with the set.
• Tighten the gland gently and evenly by hand.
• Gland packing must not be allowed to stick to the shaft. The
shaft must remain freely moveable.
4.1.2.2 Mechanical seal
For pumps with a single mechanical seal with quench arrange-
ment and quench reservoir: Depending on the liquid to be
pumped the quench reservoir should be filled to half its capacity
with water or other liquid.
4.1.3 Filling and venting
• Close the discharge isolation valve and, if fitted, open the inlet
isolating valve.
• Fill the pump with the liquid to be pumped, and totally vent. If
arranged for operation on a suction lift then use a filling funnel
or pipe.
• If vent screws are present on the suction or pressure side of
the casing, open them to let air escape.
• In case of filled discharge pipe, the pump can be filled through
the delivery non-return valve by-pass or lifting lever (if fitted).
• Turn the pump shaft several times by hand. The pump is
vented when air bubbles no longer escape from the vent
holes.
• Fill the auxiliary valves for sealing and flushing media with
water and purge the system of any air. Close the screw plugs
and the vent plugs.
• Pumps fitted with mechanical seal: Open the vent plugs of
the seal cavity (where fitted). Fill the seal cavity with water
and purge the system of air. Before starting check the seal
cavity for trapped air. The seal may be seriously damaged by
dry running! After checking, replace the plugs.
• Function of a mechanical seal: Two slide faces rub against
each other and are lubricated by a liquid film at the same time.
In the case of single-action mechanical seals, the film is
formed by a pumping medium. A leakage of between 0.2 and
5 ml/h is possible depending on running smoothness, pres-
sure, rotational speed and shaft diameter (mechanical seals
are wearing parts for which no guarantee can be given).
4.1.4 Electrical connections
• The motor must be provided with motor protection switch.
• The electricity supply and frequency provided must match the
motor nameplate details.
• The motor terminal links must be positioned to suit the supply
and the proposed starting arrangement.
4.1.5 Checking the direction of rotation
The rotational direction must comply with the marking on the
pump. Use a rotating field gauge. If a gauge is not available
then, providing that the pump contains water or is separated
from the drive, the motor can be briefly activated and then im-
mediately shut off to carry out the test. If the rotation has to be
reversed, then arrange for this to be carried out by an electri-
cian
.
Do not run pump counter to its given operation direction (direc-
tion arrow on casing).
4.2 Safety precautions
4.3 Start-up
4.3.1 Initial start-up/restarting
• Start the pump only if it is fully primed and when there is dis-
charge system pressure.
• Open the sealing and flushing valves.
• If the discharge pipework is empty:
-Close the delivery isolating valve completely before open-
ing it slightly.
-Start the pump.
-Observe the delivery pressure gauge and motor ammeter
and gradually open the discharge valve as the system
pressure increases. Take care to open the valve slowly
and not too wide.
-When the system is filled and vented check the duty point.
The pump unit may only be operated within the duty range
confirmed. We recommend to record the operation data at
the initial start-up in a protocol.
• Pumps with gland packing: Adjust the gland gradually with
the pump running. The packed gland must not overheat and
there should be a constant drip through the packing. Signifi-
cant initial leaking is not harmful and will be automatically re-
duced as the packing swells.
• V-Belt driven pumps: V-Belt stretch during the initial run-
ning-in period. For this reason, re-adjust V-belt periodically -
initially after 15 minutes - to avoid slipping or burning.
Caution: Belts adjusted too tight cause damages at bearings.
You can compare the tightening with a defined force provided
by the belt manufacturer. The checking tool can be purchased
at us.
4.3.2 Functional check
• Confirm that the readings of the pressure and vacuum gaug-
es and the motor ammeter, together with that of the flow me-
ter (if fitted) correspond to the data specified in the contract
documentation.
Electrical installations may only be carried out by
qualified personnel in compliance with IEEE Regula-
tions and Statutory Requirements.
Do not operate the pump set before fixing guards for
moving parts such as the coupling, V-belt drive etc.
If guards are not delivered with pump then they must
be provided by the installer before operation. Do not
reach under guards with hands!