jurop LC User Manual

INSTALLATION, USE AND MAINTENANCE MANUAL – LC
REV. 12
10-12-2021
15 / 44
Jurop SpA
Via Crosera n° 50
33082 Azzano Decimo, PN (Italia)
TEL. +39 0434 636811 FAX. +39 0434 636812
http://www.jurop.it
e-mail: info@jurop.it
• The cooling system we designed has a capacity of 25-30 litres.
Use a mixture of demineralised water and antifreeze liquid at a
concentration suitable to room temperature (usually between 25 and
50%).
Carefully vent the cooling circuit with the
recycling pump stopped.
Vacuum line
• Open all valves of the vacuum-pressure system.
• Open all gate valves and remove any possible obstacle from the
line.
5.2. Precautions when starting the system
• Check oil levels in gearbox and side mounted tank.
• Check that all protection devices are correctly installed.
• Check that there are no obstacles in the vacuum line.
• Check rotation direction: open all system valves and start running
slowly.
Do not rotate in the wrong direction: this may
damage the vacuum pump. Follow the arrow
indicated on the front flange.
• Check which position of the four-way integrated valve lever allows
vacuum or pressure functioning.
• Close the valve and increase vacuum rate (or operating pressure).
• Check that the lubricating pump works properly. Oil must regularly
drip into the oilers. Typically (with degree of vacuum > 50%), 35-40
drops/min (at maximum speed).
• Check loading and operating speed for vibrations or unusual
noises.
This vacuum pump is designed to work at
maximum speed, but for longer operating we
recommend the pump be run at working speed
(see par. 2.5).
• Prepare adequately transmission.
5.3. Operating precautions
• Run the vacuum pump at a room temperature of -20°C e +40°C.
• Do not make the vacuum pump overheat: maximum air
temperature on exhaust (or delivery) side: 150°C.
• Do not operate the pump without lubrication: it may cause quick
wear and possible breakdown of vanes.
• Do not start running the pump under load: this may damage the
drive system or the hydraulic motor.
• Check the rotation speed: it must never exceed the operating
limits.
• Do not accidentally operate the pump in the wrong direction: it may
break the vanes.
• Do not convey the exceeding delivery outlet towards the suction
port, otherwise it will sack warm gas.
• Do not convey the exceeding delivery outlet towards the suction
port, otherwise it will sack warm gas.
• Control the air flow by adjusting the rotation speed: do not use the
pressure relief valve to discharge the exceeding flow.
• Once the needed vacuum rate has been reached, we recommend
reducing the vacuum pump speed to its working speed (see par. 2.5):
this allows keeping the achieved vacuum/pressure rate constant. The
pump speed can also be reduced to values lower than the working
speed during the tank discharging phase (with the 4-way valve in
pressure mode) without increasing the draining time.
• Thus, exhaust temperature is reduced, vane durability is increased
and both oil consumption and power absorption are reduced.
Once the needed vacuum rate has been reached,
we recommend reducing the vacuum pump
speed to its working speed.
• After operation in dusty environments, after accidental sucking of
liquids inside the pump or before a long inoperativity period it is
recommended to wash the pump inside according to the following
procedure:
1. Before washing the pump, be sure that it has cooled down. To
obtain this in a short time, it is possible to run the pump for a few
minutes at zero vacuum conditions, or stop it at all;
Attention: Do not carry out this operation on very
hot pumps (for example after a working day) until
they have cooled down.
2. Use 1-2 liters of water mixed with a non-flammable detergent. We
suggest some product like Henkel Bonderite C-NE 5225: 5%
concentration in water. This detergent grants a good protection
against rust and oxidation.
3. Use one of the openings placed in the vacuum line (closet on the
pump) to suck some water mixed with detergent.
4. Start the pump at low speed leaving opened all the suction valves
in the tank, in order to keep low the vacuum rate (max vac. 10-
20%). Let the detergent mix entering the pump very slowly.
5. The detergent mix stays suspended in the pump inside, before
being expelled through the exhaust silencer.
6. After keeping the pump speed for a while to make the product
reaching the internal parts, it is necessary to dry the pump
preventing oxidation. When the detergent mix is finished, continue
running the pump at the lo west possible vacuum rate for a few
minutes, then close venting and suction valves up to 50-60%
maximum, for a couple of minutes. With this operation the pump will
dry from the heated air and protected from the chemical attack of
the detergent.
7. Washing the pump with this detergent guarantees a protection after
some days of inoperativity. If the pump is not used for more than
two weeks, after having washed and dried the inner parts as
described above, it is recommended to suck slowly 200 cc anti-rust
and water-repellent protective oil (or, if not available, a very fluid
gear oil).
Attention: do not carry out also this operation on
very hot pumps (for example after a working day)
until they have cooled down.

jurop LC Specifications

General

Brand	jurop
Model	LC
Category	Water Pump
Language	English