Interpump Group Pralissoli R1503 Mode D'emploi page 8

functioning of the valve. Addition agents can be used in the
water, provided that they are delicate, biodegradable and
always complying with the Regulations in force in the Country
where the valve is used.
4.4- In the systems for hot water production, the
temperature of the liquid that comes into contact
with the valve must always be lower than the value
stated in this instruction manual and/or indicated on
the valve itself. Avoid the formation of steam or
overheated water.
4.5- After use and/or before performing any operation on the
system or on the valve, release the pressure by using the
adjustment knob/screw and opening the gun or the control
device for a few seconds. The jet created by the residual
pressure must be directed downwards in order to avoid
damages or dangers.
4.6- For safety reasons, it is advisable to equip the high
pressure feeding line of the system also with a relief or safety
valve duly adjusted.
4.7- To connect the valve to the system it is preferable to use
flexible hoses fitted in a way that they do not form 90° elbows,
throttlings or siphons which could include harmful air bubbles.
The inside diameters of the hoses and fittings must be equal to
the correspondent inside diameters of the inlet, by-pass and
outlet threads of the valve. Moreover, it is necessary to correctly
choose the type of hose depending on the rated pressure and
flow-rate; the hoses must always be used within their operation
limits as stated by the manufacturer and indicated on the hoses
themselves.
4.8- Tighten the fittings for the valve connections as follows:
Outlet fitting
Coppia / Torque Nm ±5%
90 35 70
G1/2" G1/4" G3/8" M14x1,5 M20x1,5 M22x1,5 M24x1,5
By-pass fitting
Coppia / Torque Nm ±5%
180
Thread
G3/4"
4.9- In order to ensure the seal, fit a metal washer with a rubber
ring between the fittings, or use a proper sealant on the thread.
WARNING: Use parallel threads only (not tapered threads). The
threads must comply with the working pressures and the rated
torque wrench settings with reference to their material and
shape.
4.10- In order to obtain the sealing between the nipple pos.44 or
the cap pos.45 and the valve body, use the conical seal pos.1
(please contact the after-sales service of Interpump Group in
case of doubts).
4.11- Always connect the valve by-pass fitting to a hose, in
order to avoid the excessive noise caused by the water outflow
through the by-pass without hose.
4.12- Before operating the system, it is advisable to start it for a
preliminary test run in order to check that the system is properly
installed.
4.13- 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
150 kW (201 HP). As shown in the chart, this means using
pumps producing a flow rate of approx. 51.5 l/min. for maximum
working pressures of 150 MPa (1500 bar - 21755 psi), and
generating a pressure of approx. 77.5 MPa (775 bar-11240 psi)
for maximum flow rates of 100 l/min.
45 95 125
Thread
4.14- Warning: if the valve is used at a low temperature
involving the risk of frost, make sure that there is no ice
formation inside and/or that the valve is not blocked before
using it.
5- MAINTENANCE
5.1- Maintenance and repair must be carried out by qualified
and authorized staff only. Before any operation, make sure that
the valve and the system are shut down and made unusable.
5.2- A correct maintenance helps extend the working life and
grants a better performance of the valve.
5.3- From time to time, it is necessary to check that the valve is
clean outside, and that there is no sign of leakage and/or
malfunctioning. If necessary, replace the involved parts. In case
of doubts, contact the after-sales service of Interpump Group.
5.4- Replace the valve parts with original spare parts only.
IMPORTANT: After maintenance, make sure that the
valve is re-assembled correctly and that the initial
conditions are restored. Comply with the torque
wrench setting values and set the pressure again as
160
described above.
5.5- The valve is entirely made of non-toxic and safe materials;
however, in case of disposal, we suggest you do not disperse it
in the environment but take it to an authorized disposal centre
or contact the nearest INTERPUMP GROUP Authorized
Service Centre.
The valve shall not be tampered with for any
reason and/or used for any purpose other than
the use it has been designed for. In case of
tampering,
responsibility as to the valve functioning and
safety.
6- WARRANTY CONDITIONS
6.1- The period and conditions of warranty are specified in the
purchase contract.
6.2- Warranty is voided in case the valve is used for improper
purposes, used at higher performances than the rated ones,
repaired with non-original spare parts or if it turns out to be
damaged due to the non-compliance with the operating
instructions or to unauthorized tampering.
Copyright
The content of these operating instructions is property of Interpump
Group.
The instructions contain technical descriptions and illustrations that
cannot be copied and/or reproduced, entirely or in part, nor distributed to
third parties in any form and without in any case authorized written
consent of the owner.
Offenders will be prosecuted according to the laws in force and proper
legal actions will be instituted against them.
The information contained in this document may be modified without notice.
- -
8
the manufacturer disclaims all