English; Technical Features - Interpump Group PNRV2 Mode D'emploi

= ENGLISH =

= ENGLISH = = ENGLISH = = ENGLISH =
Max FLOW RATE
g.p.m.
l/min.
(USA)
230 61
«Translated from original instructions»
THIS DOCUMENT PROVIDES THE INSTRUCTIONS FOR
THE INSTALLATION, USE AND MAINTENANCE OF THE
VALVE, THEREFORE IT IS AN INTEGRAL PART OF
THE VALVE ITSELF AND MUST BE READ CAREFULLY
BEFORE ANY USE AND KEPT WITH CARE.
STRICTLY COMPLY
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 PNRV2 pressure regulator is a manually-
adjustable, pressure-operated device which, according to its
setting, limits the pump/system pressure by conveying the
excess of water to the by-pass.
Moreover, when the outlet flow is blocked, this device totally
releases the flow, thus keeping the pump/system at the
adjusted pressure.
1.2- The pneumatic control of the valve allows to cut in (ON)
or to cut out (OFF) the adjusted hydraulic pressure. This
function is particularly suited for automatic working cycles
and remote controls. Moreover, the "OFF" position allows to
start the pump at zero pressure, i.e. without the motor being
under stress.
1.3- In order to operate the pneumatic cylinder it is
necessary to use compressed air with a value ranging from
0,6 to 0,8 MPa (6-8 bar). In order to correctly control the
cylinder we suggest you use a 5/2-way pneumatic valve and
two flow regulators to define the operating time (see
diagram - table A).
1.4- Since the PNRV2 valve is used in connection with a
high pressure water pump/system, which shall be called
hereafter only "system", installation and use must be suited
to the type of system used and comply with the safety
Regulations in force in the Country where the valve is used.
1.5- Before using the valve, make sure that the system the
valve is used with is certified to comply with the relevant
Directives and/or Regulations.
1.6- Before installing and using the valve for the first time,
we suggest you check that it is undamaged and make sure
that the rated features correspond to the required ones. If
this is not the case, do not use the valve and contact the
after-sales service of Interpump Group for information.

TECHNICAL FEATURES

Max PRESSURE
MPa bar
21 210
WITH THE INSTRUCTIONS
Max TEMPERATURE
p.s.i. ° C
3045 60
1.7- In order to install the valve correctly, follow the
instructions for the water inlet, outlet and by-pass
connections, as stated in this instruction manual and/or on
the valve itself.
2- PACKAGE
2.1- Packages must be handled in compliance with the
instructions stated on the packages themselves and/or
provided by the manufacturer.
2.2- In case the valve is not used immediately, it must be
stored in its integral package and placed in areas which are
not exposed to the weather and which are protected from
excessive humidity and from direct sunlight. Moreover, it is
advisable to place wooden pallets or other types of pallets
between the package and the floor, in order to prevent the
direct contact with the ground.
2.3- The package components must be disposed of in
compliance with the relevant laws in force.
3- INSTRUCTIONS FOR PRESSURE SETTING:
3.1- In order to obtain a correct adjustment and
consequently a proper 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).
3.2- Connect the valve to the water system and to the
pneumatic circuit and follow these steps:
3.2.1- Unscrew the knob pos. 2 in order to completely
release the springs.
3.2.2- Open the gun or the water control device and start
the system. Make sure that the air contained in it is fully
ejected.
3.2.3- Start the pneumatic circuit and set the pneumatic
cylinder of the valve in the "ON" position.
3.2.4- Keeping the gun or the water control device open,
start adjusting the pressure by screwing down the knob
pos.3. Alternate the adjusting operations with a few
openings and closings of the gun or of the control device.
When the desired pressure has been reached, open and
close the gun/control device a few times again in order to
- -
7
MASS
° F kg
140 8
lbs
17.6