Rietschle VLB Serie Manual De Instrucciones página 6

Installation (pictures to
For operating and installation follow any relevant national
standards that are in operation.
1. The vacuum connection (A) is situated on the angle flange (S).
All pipes and tanks which are to be connected onto the vacuum side,
must be cleaned before use.
Long and/or small bore pipework should be avoided as this
tends to reduce the capacity of the pump.
If the suction pipe is longer than 5 m, then a larger diameter than
that of the pump flange should be used.
If solid particles or liquids are to be handled, additional separators
(Z /Z ) must be fitted in the suction pipe.
1 2
2. Exhaust port (B)
The exhaust port (B) must not be obstructed or partly obscured.
3. The lubricating oil (recommended brands see under servicing) can be
put into the pump at the oil filler port (H) of the oil tank, until the oil level
shows at the upper mark of the oil sight glass (l). After filling make sure
the oil filler port is closed.
4. The electrical data can be found on the data plate (N) or the motor data
plate. The motors correspond to DIN/VDE 0530 and have IP 54
protection and insulation class B or F. The connection diagram can be
found in the terminal box on the motor (unless a special plug connection
is fitted). Check the electrical data of the motor for compatibility with
your available supply (voltage, frequency, permissible current etc.).
5. Connect the motor via a motor starter. It is advisable to use thermal overload motor starters to protect the motor and wiring. All cabling used
on starters should be secured with good quality cable clamps.
We recommend the use of a motor starter with thermal and magnetic overload protection. A tempory overload may occur during a cold start.
The electrical installation may only be made by a qualified electrician under the observance of EN 60204. The main switch must
be provided by the operator.
6. Operation
When handling wet or aggressive gases, a valve (Z
Additionally, the pump must be operated for approximately 20 to 30 minutes, before and after the vacuum process. This allows the cold pump
to reach operating temperature before the process has begun, which avoids condensation within the pump. When the process is finished, the
pump will then be flushed with fresh oil, which clears contamination within the pump and preserves simultaneously, for the standstill. During
this running before and after the process, the valve (Z
must be turned anticlockwise a few revolutions.
Initial Operation (picture )
1. Initially, switch the pump on and off for a few seconds to check the direction of rotation against the direction arrow (O).
2. Connect the suction pipe at (A).
Potential risks for operating personnel
1. Noise Emission: The worst noise levels considering direction and intensity measured according to DIN 45635 part 3 (as per 3. GSGV) are shown
in the table at the back. When working permanently in the vicinity of an operating pump we recommend wearing ear protection to avoid any
damage to hearing.
2. Oil mist in the Exhaust Stream: Even with the high efficiency oil mist separator (optional extra) the exhausted air could still contain extremely
low amounts of oil mist which can occasionally be detected by smell. Permanent breathing of these mists may result in health problems, therefore
it is extremely important to make sure that the installation area is well ventilated.
3. Poisonous or hazardous substances in the Exhaust Stream: When the pump is used for chemical processes, poisonous or hazardous materials
can be exhausted. Therefore, it is necessary to route them via a scrubbing system.
Maintenance and Servicing
When maintaining these units and having such situations where personnel could be hurt by moving parts or by live electrical parts
the pump must be isolated by totally disconnecting the electrical supply. It is imperative that the unit cannot be re-started during
the maintenance operation.
Hazardous substances must be removed before servicing. Maintenance personnel should be informed regarding the presence of
anything harmful and also be informed about all relevant safety regulations before carrying out any work.
1. Lubrication (pictures and
All VLB pumps are fresh oil lubricated and therefore the oil level should be checked every 50 operating hours at the oil sight glasses (I). If the oil
level is visible in the lower sight glass, or if it is below this level, then oil should be refilled at the
oil filler port (H). It is not necessary to check the oil if an oil level switch (V) is fitted. A level switch
will automatically stop the pump as soon as the minimum level is reached.
The viscosity must correspond to ISO-VG 100 according to DIN 51 519.
We recommend the following oil brands: Bechem VBL 100, BP Energol RC 100, Esso rotary oil
100, Mobil vacuum pump oil heavy, Shell Tellus oil C 100 and Aral Motanol HK 100 or equivalent
oils from other manufacturers (see oil type plate (M)).
If the oil brand is changed, the old oil must be drained completely from the oil tank.
Old and used oil must be disposed of corresponding with the relevant health,
safety and environmental laws.
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) (optional extra) must be installed into the inlet suction pipe as close as possible to the pump.
4
) must be closed. The cover of the oiler (G) must also be opened and the milled screw (G
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