Pratissoli H450 Mode D'emploi page 5

= ENGLISH =
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 WITH THE INSTRUCTIONS 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 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.
2- INSTRUCTIONS FOR PRESSURE SETTING:
2.1- 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).
2.2- Connect the valve to the water system and follow these
steps:
2.2.1- Remove the yoke pos.38 by means of a screwdriver.
2.2.2- Withdraw the knob pos.39.
2.2.3- Unscrew the adjustment screw pos.4 and the nut pos.2 up
to contact with the stop ring pos.1.
2.2.4- Open the gun or the water control device and start the
system. Make sure that the air contained in it is fully ejected.
2.2.5- Keeping the gun or the water control device open, start
adjusting the pressure by screwing down the adjustment ring nut
pos.3. 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.
TECHNICAL FEATURES
Max. PRESSURE
MPa bar p.s.i.
40 400 5800
-
Max. TEMPERATURE
°C
85
2.2.6- 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.
2.2.7- Lock the adjustment screw pos. 4 by tightening the nut pos.
2.
2.2.8- Fit back the knob pos. 39 and the yoke pos. 38.
2.2.9- In order to obtain working pressures lower than the
maximum set pressure, turn the knob pos. 39 counter-clockwise.
2.2.10- The minimum pressure can be obtained by unscrewing
the knob up to limit stop.
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.
3- WARNINGS
3.1- Use guns or other control devices ensuring a perfect seal
when closed. Leakages may compromise the correct functioning
of the valve.
3.2- 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.
3.3- Tighten the fittings used on the G1/2" threads of the valve
(torque wrench setting 60 Nm ±5%). 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.
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.
-
5
MASS
°F kg
185 2.8
lbs
6.15