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«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 S1520 safety valve is a manually-adjustable, pressure-
operated device which, according to its setting, releases the
excess of water when the pressure inside the pump/system
exceeds the adjusted value, thus reducing the pressure. The
normal working conditions can be restored by turning off and
then restarting the system.
The valve has been designed to protect positive-displacement
pumps or components (such as containers and pipes) of high
pressure water hydraulic systems up to category II.

1.2- Since the S1520 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 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.

1.4- 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.

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.

2.3- The package components must be disposed of in
compliance with the relevant laws in force.

3- INSTRUCTIONS FOR INSTALLATION:

3.1-  The  setting  pressure  (SP)  is  adjusted  and  fixed  by
sealing  by  Interpump  Group  and  cannot  be  changed.  The
values  of  the  setting  pressure  and  suggested  maximum
working pressure (WP) are stated on the valve.

3.2- The maximum flow rate depends on the setting pressure
and ranges from 40 to 241 l/min. The exact value is stated on
the valve.

3.3- The setting pressure (SP) is the pressure at which the valve
opens, thus determining the maximum pressure value that the
system cannot exceed.

3.4-  The  installation  must  be  made  by  qualified  and  authorized
staff  only,  who  must  have  the  required  skills  to  handle  high
pressure  systems  and  be  informed  of  the  operating  and  safety
instructions contained in this document.

3.5- The fastening and sealing system of the S1520 valve is
designed for Interpump Group pumps and/or products.

3.6- The seal of the G1” fitting is made by conical seal
part no. 36274866.

3.7-  Before  installing  the  valve,  slightly  lubricate  the  G1”1/2
thread  with  a  grease  specific  for  very  high  pressures  (EP-
extreme  pressure)  containing  Graphite  or  Molybdenum,  then
tighten the fitting by means of a dynamometric wrench 150 Nm.

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.

IMPORTANT:  In  order  to  effectively  protect  the
system,  we  suggest  that  the  valve  is  installed
close  to  the  pump.

Also make sure of the

absence of any on-off devices.