Shut-Down; Maintenance/Servicing; Safety Notices; Maintenance And Inspection - RITZ Series RITZBloc Betriebsanleitung

Series RITZBloc
- 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.
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.
• Check the operating data at all operating states possible in
the system (parallel operation of pumps, other delivery pur-
poses, etc.)
• Record readings for future reference.
• Check the bearing temperature. A temperature of 50°C above
the ambient temperature is acceptable.
4.3.3 Closed valve operation
Never run the pump with the suction and discharge
isolating valves closed or with the discharge valve
closed at non-return valve installed at suction side.
Under such conditions the pump contents will be
rapidly vaporised and very high pressures generat-
ed. These may exceed the bursting pressure of the
pump casing, creating a serious hazard to personnel
and property.
4.4

Shut-down

4.4.1 Switching off
• Close the isolating valve in the discharge pipe.
• Switch off the pump.
• A non-return valve above which a corresponding pressure is
built by the liquid column makes the actuation of a discharge
side valve unnecessary.
• Close the additional valves.
4.4.2 Draining
• If frost is anticipated, drain any pumps or pipework not in use,
or take other precautions to prevent damage from frost.
• After pumping polluted media and to prevent corrosion when
not in use the pumps should be drained and, if necessary,
flushed.

5. Maintenance/servicing

5.1

Safety Notices

• Never work on the set until the electricity supply
has been disconnected completely. It must be im-
possible for the set to be started inadvertently.
• Always wear safety gloves when assembling/strip-
ping the pumps or when adjusting glands.
5.2

Maintenance and inspection

5.2.1 Lubricant and greasing intervals
• Grade of grease: Lithium-based grease according to DIN
51825, non-ageing, non-acidic, non-corroding, water-resist-
ant with a working temperature of -30 to +130°C, penetration
rate of 2 to 3, working penetration of 265 to 295 and a dripping
temperature of approx. 190°C.
• Recommended commercially-available grades of grease:
- UNIREX N2, (ESSO)
- OPTIMOL OLISTA LONGTIME or OLIT 2, (OPTIMOL)
- GLISSANTO 20, (DEA)
- ENERGREASE MSLS-EP2, (BP)
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5.2.1.1 Electric motor with regreasing facility
The bearings are filled at works with grease. Grease nipples en-
able the regreasing of the bearings from outside. For greasing
intervals, grade of grease and capacity please refer to the
nameplate.
5.2.1.2 Electric motor without regreasing facility
• Grease filling at works.
• Maintenance interval for bearing exchange:
at 3000 rpm = 10000 working hours
at 1450 rpm = 20000 working hours
• At excessive heating of motor bearings (more than 50°C
above ambient temperature) please check the grease lubrica-
tion. Grease should be exchanged every 3 years due to ma-
turing.
5.2.2 Monitoring the pump during operation
For satisfactory operation carry out the following checks as rou-
tine:
• Monitor the smooth running of the pump. In case of unusual
strong vibrations immediately switch off the unit and check for
reason (impeller damage, foreign matters, clogging, etc.)
• If leakage occurs at shaft clean, inspect and if necessary re-
place the mechanical seal. 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).
• Regularely check local readings, the best each working day,
and immediately react to any large deviations.
• At regular intervals, the best once a week, check all meas-
ured and recorded operating values and note down in a unit
casebook. Determine the maintenance interval on the basis
of the trend (data development).
• Pressure gauge with three way cock: Only open the three-
way cock in order to obtain a gauge reading and close it im-
mediately afterwards.
• If pumping highly corrosive and/or abrasive media, the
components containing pressure should be inspected regu-
larly to avoid unexpected failure. The interval between in-
spections should be short initially and may be extended as
experience is gained.
5.3

Disassembly and assembly instructions

Stripping and assembly should only be carried out by qual-
ified personnel and with reference to the relevant sectional
drawings (see para. 7.4). The stripping sequence will be
clear from the drawing.
• When disassembling the impeller: The pump
casing remains connected to the pipework.
• When disassembling the pump casing: secure
the pump casing and pipework against falling
down.