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FLOW RATE
g.p.m.
l/min.
(USA)
min-max
min-max
8-50 2.1-13.21
«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 H450 automatic pressure regulator is a
manually-adjustable,
pressure-operated
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 – and keeps under pressure the portion of
the system following the valve, while it sets the pressure to
zero in the portion of the system preceding the valve.
1.2- Since the H450 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.
1.3- 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.
1.4- 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.
1.5- 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.
TECHNICAL FEATURES
Max. PRESSURE
MPa
bar
40
400
WITH
THE
INSTRUCTIONS
device
Max. TEMPERATURE
p.s.i.
° C
5800
85
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 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
which,
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 exploded view (page 4).
3.2- Connect the valve to the water system and follow
these steps:
3.2.1- Remove the yoke pos.38 by means of a screwdriver.
3.2.2- Withdraw the knob pos.39.
3.2.3- Unscrew the adjustment screw pos.4 and the nut
pos.2 up to contact with the stop ring pos.1.
3.2.4- Open the gun or the water control device and start
the system. Make sure that the air contained in it is fully
ejected.
3.2.5- Keeping the gun or the water control device open,
start adjusting the pressure by screwing down the
adjustment
ring
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 stabilize the various components (seals,
springs etc.). Check the pressure value again and correct if
necessary.
3.2.6- Hold the adjustment ring nut pos. 3 by means of a
spanner and unscrew the adjustment screw pos. 4 up to
contact with the adjustment ring nut pos. 3.
3.2.7- Lock the adjustment screw pos. 4 by tightening the
nut pos. 2.
-
-
7
° F
kg
185
2.8
nut
pos.3.
Alternate
MASS
lbs
6.15
the
adjusting
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