Technical Features - Pratissoli R4090 Série Mode D'emploi

= ENGLISH =
Max FLOW RATE
MODEL
l/min.
R4090LP 965
R4090HP 833
«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 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, thus keeping the pump/system at the adjusted pressure.
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 spare parts catalogue (page 3).
2.2- Connect the valve to the water system and follow these steps:
2.2.1- Unloose the nut pos. 27.
2.2.2- Unscrew the screw pos. 30 in order to completely release the
springs.
2.2.3- Open the gun or the water control device and start the system.
Make sure that the air contained in it is fully ejected.
2.2.4- Keeping the gun or the water control device open, start
adjusting the pressure by screwing down the screw pos.1. 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.
2.2.5- Screw down the lower nut pos. 27 up to contact and lock it on
the body.
2.2.6- In order to obtain working pressures lower than the maximum
set pressure, unscrew the screw pos. 30.
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.

TECHNICAL FEATURES

Max PRESSURE
g.p.m.
MPa
(USA)
255 22
220 40
-
TEMPERATURE
bar p.s.i. °C
220 3190 60
400 5800 60
2.2.7- In order to optimize the pump-valve coupling, it is necessary
to keep the valve operation range, as a function of the pump pressure
and flow rate, within a maximum power of 350 kW (475 HP). As
shown in the chart (pag. 4) , this means using pumps producing a
flow rate of approx. 458 l/min. for maximum working pressures of 40
MPa (400 bar - 5800 psi), and generating a pressure of approx. 19
MPa (190bar - 2755 psi) for maximum flow rates of 965 l/min.
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
Max
MASS
°F kg
140 37
140 37
lbs
81.5
81.5