Pratissoli H284 Mode D'emploi page 7

= ENGLISH =
FLOW RATE
g.p.m.
l/min.
(USA)
min-max
min-max
8-41 2.11-10.83
«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 H284 automatic 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 – 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 H284 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.
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.
TECHNICAL FEATURES
Max. PRESSURE
MPa
28 280
WITH THE INSTRUCTIONS
TEMPERATURE
bar p.s.i.
4060
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 exploded view (page 4).
3.2- Connect the valve to the water system and follow these
steps:
3.3- Maximum pressure
3.3.1- Remove the yoke pos.34 by means of a screwdriver.
3.3.2- Withdraw the knob pos.35.
3.3.3- Unscrew the ring nut pos.4 and the nut pos. 3 up to the
upper limit stop of the adjustment screw pos. 2.
3.3.4- Screw down the adjustment screw pos. 2 up to the lower
limit stop pos. 8.
3.3.5- Open the gun or the water control device and start the
system. Make sure that the air contained in it is fully ejected.
3.3.6- Keeping the gun or the water control device open, start
adjusting the pressure by screwing down the adjustment ring
nut pos. 4. 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 stabilize the
various components (seals, springs etc.). Check the pressure
value again and correct if necessary.
3.3.7- Lock the ring nut pos. 4 by tightening the nut pos. 3.
3.4- Minimum pressure
3.4.1- Unscrew the ring nut pos. 4 until the minimum desired
pressure is reached.
3.4.2- Screw down the lower nut pos. 1 up to contact with the
adjustment screw pos. 2.
3.4.3- Lock the lower nut pos. 1 by tightening the upper nut pos.
1.
3.4.4- Fit back the adjustment knob pos. 35 and the yoke pos.
34.
- -
7
Max.
° C ° F
90 194 1.02
MASS
kg lbs
2.24