-
8
-
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.
3.4.4- In case you decide to change the adjusted hydraulic pressure
later, follow the procedure stated in paragraph 3.4.3 again.
3.5-
The maximum pneumatic pressure allowed within the
PNRV14 valve must not exceed the below-mentioned
values:
PNRV14/800 = max. air pressure 0.48 MPa (4.8 bar)
PNRV14/1500 = max. air pressure 0.65 MPa (6.5 bar)
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, flow-rate and
temperature as stated in this document and/or
indicated on the valve.
4- WARNINGS
4.1- The installation and the setting of the maximum pressure must
be made by qualified staff only, who must have the required skills to
handle high pressure systems and be informed of the operating and
safety instructions contained in this document.
4.2- The installer must provide the ultimate consumer with the proper
instructions for the correct use of the system the valve is used in
connection with.
4.3- Use soft and filtered water only. In case of salt water and/or of
water containing solid particles of a size exceeding 20µm, the internal
components of the valve will be subject to quick wear; furthermore,
this might compromise the correct 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° elb ows, 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
By-pass fitting
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.
4.10- In order to obtain the sealing between the nipple pos.2 or the
cap pos.3 and the valve body, use the conical seal pos. 19 (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.
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 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, the
manufacturer disclaims all 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.
The information contained in this document may be modified without notice.
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.
Coppia / Torque Nm ±5%
90
35
70
45
95
125
160
G1/2” G1/4” G3/8” M14x1,5 M20x1,5 M22x1,5 M24x1,5
Thread
Coppia / Torque Nm ±5%
180
310
G3/4”
G1”
Thread
