REV
. 10
22-04-2020
INSTALLATION
,
USE AND MAINTENANCE MANUAL
–
PN
15 / 40
Jurop
SpA
Via Crosera n° 50
33082 Azzano Decimo, PN (Italia)
T
EL
. +39 0434 636811 F
AX
. +39 0434 636812
http://www.jurop.it
e-mail: [email protected]
5.1.
Pump starting-up
• Before starting the equipment check the lubricating oil level of the
pump by means of the proper dip stick.
• Refill the tank with lubrication oil.
• Check the oil level in the gear box (if the pomp is provided with it).
• In order to choose the most suitable oil, see paragraph. 2.5.
• Check that all protection and safety devices are correctly installed.
• Check that no obstacles obstruct the vacuum and pressure line or
the air injection cooling system.
• Check rotation direction: open all system valves and start running
at slow speed.
Do not rotate in the wrong direction: pump may
be damaged.
• Check which position of the 4-way integrated valve lever allows
vacuum or pressure functioning.
• Rotating the handle of the 4-way valve (pos. 1÷2 - See following
figure) the pump changes over from vacuum to pressure (or vice versa).
Pic. 5.1
• In case the pump is connected to the tank with the rear connection
(oil tank side) the functions "Vacuum - Pressure" will be reversed.
Manifold
Drive
Handle pos.
Pump function
STANDARD
Direct drive left
1
Pressure
Gearbox right
2
Vacuum
Direct drive right
1
Vacuum
Gearbox left
2
Pressure
MIXER
Direct drive left
1
Vacuum
Gearbox right
2
Pressure
Direct drive right
1
Pressure
Gearbox left
2
Vacuum
• Be aware not to place the handle in neutral position (half way
between the two end positions) otherwise the pump will be by-passed
(actually runs idle).
Be aware not to place the handle in neutral
position otherwise the pump will be by-passed.
• Close the valve and increase vacuum rate (or operating pressure).
• Check loading and operating speed for vibrations or unusual
noises.
This vacuum pump is designed to work at
maximum speed. For longer operating we
recommend the pump be run at working speed.
• Prepare adequately transmission.
5.2.
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: that causes stress to the
drive system and the hydraulic motor.
• Check rotation speed. The vacuum pump must never exceed the
maximum speed or run below the minimum speed.
• 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.
• Control the air flow by adjusting the rotation speed: do not use the
pressure relief valve to discharge the exceeding flow.
• Once that the wanted vacuum rated has been attained it is
recommendable to decrease the speed, (see par. 2.3). This useful
procedure, that will not increase the time requested to fill up the tank,
will however result in a lesser wear of the vanes. It is suggested to
reduce the speed also when operating with pressure.
• When, 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
5. Start up