I
NSTALLATION
,
USE AND MAINTENANCE MANUAL
–
RV360
-
520
R
EV
.
09
21-03-2016
11 / 32
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]
4.4
Vacuum - pressure line
Pic. 4.5
• See figure 4.5.
• In order to avoid the suction of liquids, a primary flow shutoff valve
(Pos. 1) and a secondary shutoff (Pos. 2) are to be mounted on the
suction line. If necessary, also apply a suction filter (Pos. 3) to prevent
solids from entering.
• The silencer (Pos. 4) applied to the pump exhaust - besides
reducing the noise level - is designed to separate the oil mist expelled
from the pump outlet port. The separator must be easily drained from
oil and condensate accumulated at regular intervals.
• The diameter of the vacuum or pressure line pipes must be
properly dimensioned to the pump flow and, in any case, it must be
larger than the diameter of the ports.
• The pipes weight or their dilatations must not solicit the pump
housing. Use high temperature resistant rubber connections.
• Before mounting, remove the port protections. All pipes and line
components must be clean.
• Avoid restrictions and tight curves as much as possible, if not
strictly necessary.
• Exhaust pipe can reach high temperatures. Hence, they must be
properly isolated.
• An over-pressure safety relief valve (Pos. 5) should be mounted in
order to prevent the overloading of the vacuum pump. Mount the valve
near the pump without applying any gate valves on the line.
• A vacuum relief valve (Pos. 6) should be applied to limit the
maximum vacuum rate at 80% in order to prevent the pump running at
continuous duty from overheating.
• Venting shutter (Pos. 9): it is also useful to cool down the
overheated pumps as well as for their internal wash-up. Direct the air
flow away from the operators.
• Thermostat (Pos. 8): it must be installed at maximum 150 mm from
the exhaust port. The sensitive element must reach the pipe centre.
Safety thermostat on manifold is supplied on request.
4.5
Hydraulic actuator adjustment
• Extraordinary maintenance operations can require the upper cover
(and that of the actuator, either manual or pneumatic) to be removed.
We recommend ensuring enough space to carry out such operations.
• If the cock blocks or it moves with friction, screw up the clearance
regulation nut (A). Screw up ¼ of turn each time. Block the nut rotation
with the safety nut.
• The lubrication points (B) and the clearance regulation bolt (A)
must be accessible. See Fig. 4.6.
• Lubricate with grease every 1000 cycles. Grease type NLGI 2.
• It is suggested to install 2 one
‐
way flow controller between the
hydraulic switch and the hydraulic actuator. Set the flow controllers in
order to prevent hard hitting through the end of stroke. Minimum
commutation time: 1 second.
• Maximum feed pressure: 30 bar.
• To order spare parts see spare parts list at the end of this manual.
Pic. 4.6
4.6
Pneumatic actuator adjustment
• In the event of 4-way valves equipped with pneumatic actuator, we
recommend installing two one-way flow regulators between the
pneumatic “control” and the pneumatic actuator. The following figure
shows a schematic view of a possible pneumatic installation.
• We recommend adjusting the two flow regulators in order for
rotation to occur without knocks and with a switching time of at least
one second.
Vacuum line components
1
Primary shutoff
6
Vacuum relief valve
2
Secondary shutoff
7
Manometer -1 / +3 bar
3
Suction filter
8
Thermostat
4
Silencer – oil separator
9
Venting shutter
5
Overpressure safety valve
3
2
1
4
5
6
7
9
8
