Publicité
= ENGLISH =
Max FLOW RATE
MODEL
l/min.
PN2S/200
300
PN2S/300
300
«Translated from original instructions»
THIS
DOCUMENT
PROVIDES
INSTALLATION,
USE
AND
THEREFORE IT IS AN INTEGRAL PART OF THE VALVE ITSELF AND
MUST BE READ CAREFULLY BEFORE ANY USE AND KEPT WITH
CARE.
STRICTLY COMPLY WITH THE INSTRUCTIONS CONTAINED IN THIS
DOCUMENT IN VIEW OF A SAFE AND EFFECTIVE USE OF THE VALVE.
FAILURE TO COMPLY WITH THESE INSTRUCTIONS MIGHT CAUSE
EARLY FAULTS AND RESULT IN SITUATIONS OF DANGER, IN
ADDITION TO VOIDING ANY WARRANTY.
1- GENERAL INFORMATION:
1.1- The pressure regulator is a manually-adjustable, pressure-operated
pneumatic-control device. According to its setting, this device limits the
pump/system pressure by conveying the excess of water to the by-pass.
Moreover, when the outlet flow is blocked, it totally releases the flow, thus
keeping the pump/system at the adjusted pressure.
1.2- The pneumatic control of the valve allows to change the hydraulic
working pressure by changing the air pressure. The two pressures are
proportional, i.e. when increasing the pneumatic pressure the hydraulic
pressure increases and when reducing the pneumatic pressure the hydraulic
pressure decreases (see table A).
1.3- The pneumatic control of the valve allows to cut in or to cut out the
adjusted hydraulic pressure. This function is particularly suited for automatic
working cycles and remote controls. When the pneumatic pressure is cut out,
the pump starts at zero pressure, i.e. without the motor being under stress.
1.4- In order to operate the pneumatic control of the valve it is necessary to
use compressed air with a value depending on the desired hydraulic
pressure. In order to correctly operate the pneumatic control we suggest you
use a 3/2-way valve and a pressure regulator as shown in the diagram (table
B).
2- WARNINGS:
2.1- To ensure the tightness of the fittings used to connect the valve to the
system, interpose a metal washer with a rubber ring or insert an appropriate
sealing on the thread and tighten them to the torque indicated in the table.
THREADING
G1"
G1"1/4
2.2- In order to optimize the pump-valve coupling, it is necessary to keep the
valve operation range, as a function of the pump pressure and flow rate,
within a maximum power of 115 kW (156 HP). As shown in the chart (see
pag.6):
- PN2S-200 this means using pumps producing a flow rate for maximum
working pressures of 20 MPa (200 bar - 2900 psi), and generating a pressure
for maximum flow rates of 300 l/min.
- PN2S-300 this means using pumps producing a flow rate of approx. 200
l/min. for maximum working pressures of 30 MPa (300 bar - 4350 psi), and
generating a pressure of approx. 20 MPa (200 bar-2900 psi) for maximum
flow rates of 300 l/min.
Important: Please contact the after-sales service of Interpump
Group in case you should decide to use the valve in the "by-
pass" mode by plugging the valve outlet with a cap.
TECHNICAL FEATURES
Max PRESSURE
g.p.m.
MPa
(USA)
79,3
20
79,3
30
THE
INSTRUCTIONS
FOR
MAINTENANCE
OF
THE
TORQUE [Nm]
310 ± 5%
450 ± 5%
bar
p.s.i.
200
2900
300
4350
3- INSTRUCTIONS FOR PRESSURE SETTING:
THE
3.1- In order to obtain a correct adjustment and consequently a proper
VALVE,
functioning of the valve, always make sure that, when working at the
maximum pressure, the valve by-pass keeps releasing a quantity of water
equal to 5% of the total flow-rate. In case the flow-rate at the by-pass is
close to zero or exceeds 15% of the maximum flow-rate, this could cause
faults, early wear and result in situations of danger.
The positions mentioned in the following instructions refer to those shown
in the spare parts catalogue (page 4-5).
3.2- Connect the valve to the water system and to the pneumatic circuit and
set it upright or orizontal (for other positions please contact the after-sales
service of Interpump Group), then follow these steps:
3.3- Open the pneumatic pressure regulator completely in order to control
the valve.
3.4- Start the hydraulic system on which the valve is fitted and make sure
that the air contained in it is fully ejected.
3.5- Open the gun or the water control device. Start the pneumatic circuit
and begin adjusting the air pressure within the valve by using the pneumatic
pressure regulator. Alternate the adjusting operations with a few openings
and closings of the gun or of the control device. When the desired hydraulic
pressure has been reached, open and close the gun/control device a few
times again in order to stabilize the various components (seals, springs
etc.). Check the pressure value again and correct if necessary.
3.6- In case you decide to change the adjusted hydraulic pressure later,
follow the procedure stated in paragraph 3.2.3 again.
3.7- The upper body pos. 4 is equipped with a safety valve pos. 55 in order
to limit the pneumatic pressure within the valve and with a permanently
open breather nozzle pos. 54 in order to regulate the functioning (air
consumption). The installer must adjust the safety valve so that it opens
when the pneumatic pressure is approx. 10% higher than the pneumatic
pressure necessary to obtain the maximum desired hydraulic pressure.
3.8- The maximum pneumatic pressure allowed within the valve must
not exceed 0.7 MPa (7.0 bar).
4- MAINTENANCE:
4.1- From time to time, check the oil window pos.3 to verify the oil level. If
necessary, add the oil by the cap pos.3 up to the middle of the oil window.
4.2- From time to time, it is necessary to check that the valve is clean
outside, and that there is no sign of oil or water leakage and/or
malfunctioning. If necessary, replace the involved parts. In case of doubts,
contact the after-sales service of Interpump Group.
4.3- The valve contains approx. 0.25 litres of high-viscosity hydraulic oil (cSt
40°C=44.2) containing addition agents used to grant higher performances,
with an excellent level of protection against wear and high oxidation and
corrosion strength. It is possible to use other oils having similar features
provided that they are VG 46 DIN 51519 ISO quality (or with 15W-20 SAE
degree).
4.4- The exhausted oil must be gathered in containers and disposed of
contacting the authorized centres as established by the laws in force.
The oil must not be dispersed in the environment for any reason.
In case of doubts, do not hesitate to contact the after-sales service of
Interpump Group.
IMPORTANT: During use, never exceed the maximum
values of pressure (of water and air), flow-rate and
temperature as stated in this document and/or indicated
he valve.
The information contained in this document may be modified without notice.
-
-
8
Max
TEMPERATURE
°C
°F
60
140
MASS
kg
lbs
16 35,3
Publicité
