REV
02-12-2019
INSTALLATION
,
USE AND MAINTENANCE MANUAL
–
PNR/E 73-83
-
104-124
–
PNR 142
12 / 44
Via Crosera n° 50
33082 Azzano Decimo, PN (Italia)
EL
AX
http://www.jurop.it
e-mail: info@jurop.it
Do not dispose of in the environment. Dispose of
in compliance with the standards in force.
• Over-pressure safety relief valve (Pic. 4.2 - pos. 5). It must be
dimensioned to discharge the entire air-flow of the pump. The
adjustement of this valve has to be kept inside 10% of tollerance of the
pump's working pressure and in any case it has to stay inside the given
value of the tank's work pressure.
• Vacuum control valve has to be fitted on the suction piping, if the
tank's characteristics or the vacuum line will need this kind of vacuum-
limiting device.
Pic. 4.3
• For pumps that reach, during normal operating, discharge air
temperature close to 160-180 °C (320-360°F) - (checked at not more
than 150 mm from the discharge connection) it is necessary to use a
device (overheating limiter) that will not allow to exceed such
temperature. Contact our Technical Department.
• An adjustable curved pipe is installed on the outlet of the silencer,
in order to prevent rain from entering and to enable positioning (during
installation) of the output airflow.
• An oil-separator must be installed in correspondence of the
discharge line of PNR/E. Besides reducing the noise produced by the
air flow along the vacuum line, the silencer also traps the oil vapour at
the outlet due to decompressor lubrication.
Attention: an oil-separator must be installed in
correspondence of the discharge line.
4.7. Overheating alarm (optional)
• The vacuum pump can be equipped at the request of thermostat
sensor. (See Fig. 4.1).
• Overheating alarm is strongly recommended in the following
cases:
− Operations close to the use limits.
− Under pressure operations.
− Not well defined or monitored operation conditions.
• The alarm (available upon request) is composed of a blinking light
and a warning buzzer that have to be connected to the thermostat
(sensor). It is available at 12V or 24V.
• Consider the thermostat characteristics (See Fig. 4.4).
− Voltage from 6V to 24V with CC, from 6V to 12V with AC.
− Maximum power: 3W.
• When threshold temperature is reached the alarm system is
enabled and a gate valve (along vacuum line) is opened.
• It has to be mounted in a protected position in order to keep it free
from water and other damaging media. Prepare the necessary
connections for the electrical feeding.
• If the box supplied as an accessory is not used, make a check
circuit as illustrated in Fig. 4.4.
Pic. 4.4
• Overheating can seize the vacuum pump, causing a damage also
in the drive line. Stop the pump for cooling or drive it at free ports
conditions (with the suction valves fully opened) to let it cool down
properly. The pump can be again operated only when the alarm is
turned off after cooling.
• Check the muffler cleanliness. Obstructions may cause
overheating.
Attention: overheating can seize the vacuum
pump, causing a damage also in the drive line.
4.8. Vacuum-pressure inverter: remote control
actuators
• A specific design of the vacuum-pressure diverter available on
request enables the application of a pneumatic or hydraulic angular
actuator (90°).
• See the exploded view at the end of the manual for spare parts.
Pneumatic actuator Hydraulic actuator
Fluid
Filtered, dried
compressed air
Hydraulic oil ISO-L-HM
Filtration
ISO 8573-1 classe 4
(15 micron)
ISO 4406 21/19/16
Temperature °C -20 ÷ +80 -20 ÷ +80
Rated pressure bar 5.6 150
Maximum pressure bar 8.4 200
Supply holes G 1/4 G 1/8
Hydraulic actuator installation
• Adjust movement speed using the two built-in valves.
• Use a closed-centre distributor or apply a block valve.
BATTERY
TERMOSTAT
(
ON DL MANIFOLD
)
BATT
.
+
TERM
.
+
7,5
A
CHECK
OVERHEATING
VACUUM CONTROL
VALVE SET UP
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