Interpump Group P350 Operating Instructions

«Translation of the original instructions»
THIS DOCUMENT IS AN INTEGRAL PART OF THE GUN
AND MUST BE READ CAREFULLY BEFORE USING IT.
FOR A SAFE AND EFFECTIVE USE OF THE GUN, YOU
MUST COMPLY STRICTLY WITH THE INSTRUCTIONS
CONTAINED IN THIS DOCUMENT.
THE NON COMPLIANCE WITH THESE INSTRUCTIONS
MIGHT CAUSE EARLY FAILURES AND RESULT IN
SITUATIONS OF DANGER, IN ADDITION TO VOIDING
ANY WARRANTY.
 The high pressure trigger gun model P350L/P350 is a
device which stops the passage of liquid through the
nozzle in case the trigger is not maintained in its working
position. Its sole intended function is to wash objects,
things and, in any case, surfaces suited to be treated with
the mechanical action of a water jet under pressure and
possibly with the chemical action of liquid detergent
additives.
 Since the trigger gun is used in connection with a high
pressure machine/equipment, installation and use must
be suited to the type of machine/equipment used and
comply with the safety Regulations in force in the Country
where the gun is used.
 Before using the P350L/P350 gun, make sure that the
machine/equipment the gun is used with has been certified
to comply with the relevant Directives and/or Regulations.
 In order to use the P350L/P350 gun it is necessary to
complete it with a spray lance and connect it to the high
pressure hose.
Fit a spray lance (B) on the trigger gun (A). The spray
lance must be long enough to obtain a distance of over
750 mm between the trigger and the upper nozzle.
Connect the end of the high pressure hose (C) on the
lance (A).
 IMPORTANT: During use, never exceed the maximum
values of pressure, flow rate and temperature stated in
this document and indicated on the gun.
For this purpose, it is necessary to correctly choose the
type of nozzle to be used on the spray lance (depending
on the flow rate) and the pressure regulator on the feeding
line of the gun.
Remind that the pressure increases both when increasing
the flow rate and keeping the nozzle diameter the same,
and when keeping the flow rate constant and using a
nozzle with a smaller diameter.
In case of doubts, do not hesitate to contact the
manufacturer.
 For a safe use, it is necessary to equip the high pressure
feeding line with a unloader valve by-passing the water
flow when the gun is closed and the outlet flow is cut off.
 The gun is equipped with a safety/locking device located
on the trigger to avoid unintentional opening; always make
sure that the safety device is correctly engaged when the
gun is not being used.
 During use, it is absolutely forbidden to block the trigger in
the open position by any means.
Hereafter are some important operating instructions:
 The use of the gun is forbidden to children and it is
permitted only to qualified staff, who are informed of the
gun operating instructions and features.
Before use, make sure that nobody

who could be harmed by the water jet
and/or by ejected fragments
standing within the gun working
range. Do not direct the jet towards
oneself or other persons and/or animals, even if standing at
a distance and even though the nozzle is not under
pressure.
 Wear protective clothes, gloves, glasses and
antislip footwear.
It is necessary to verify the noise level produced
 by the unit and the vibrations the operator is
subjected to (depending on the type of work and
installation) and to determine the maximum time
of exposure and/or any precautions for use
according to the regulations in force.
Important: When the gun trigger is operated, the issue of

liquid under pressure from the nozzle creates a sudden
recoil force. This force is determined by the combined
effect of flow rate and pressure and must not exceed 150N
in any case.
When operating the gun to reach the pressure for normal
 working conditions, direct it downwards and take care that
the gun is in the open position.
Use clean and filtered water only. In case of water

containing solid particles of a size exceeding 15µm, the
internal components of the gun will be subject to quick
wear; furthermore, this might cause situations of danger.
From time to time, it is necessary to check that the parts

under pressure do not show cracks and/or leakages; the
frequency of this check depends on the actual use.
 Maintenance and repair must be carried out by qualified
and authorized staff only.
Use original spare parts only.
In case of disposal, do not scatter the material in the
 environment; instead, take it to an authorized disposal
centre or contact the nearest Interpump Group Authorized
Service Center.
The gun must not be tampered with for any reason. In
case of tampering, the manufacturer disclaims all
responsibility as to the gun functioning and safety.
Cod. 18980703 Rev.1
ISTRUZIONI D'USO – OPERATING INSTRUCTIONS
is
PORTATA max
Max FLOW RATE
g.p.m.
l/min MPa
(USA)
41 10.5 35
PRESSIONE max TEMPERATURA max
Max PRESSURE Max TEMPERATURE
bar p.s.i. ° C
350 5075 150
Dis. Cod.18900500
MASSA
MASS
P350 P350L
° F
Kg lbs Kg lbs
300
0.7 1.6 1.2 2.6