General Information; Key To Symbols; Qualified Staff; Improper Use - Madas FRG/2MBC Mode D'emploi

1.0 - GENERAL INFORMATION

This manual shows you how to safely install, operate and use the device.
The instructions for use ALWAYS need to be available in the facility where the device is installed.
ATTENTION: installation/maintenance needs to be carried out by qualified staff (as explained in
section 1.3) by using suitable personal protective equipment (PPE).
For any information pertaining to installation/maintenance or in case of problems that cannot be solved with the instructions,
contact the manufacturer at the address and phone numbers provided on the last page.
1.1 - DESCRIPTION
Device which supplies a preset and constant "downstream" pressure value (Pa) (within the intended operating limits) according
to variations in the inlet pressure (Pe) and/or the flow rate (Q). The compensated obturator ensures precision when adjusting
the outlet pressure (Pa) even with high and sudden variations in the inlet pressure.
These regulators are used in both civil and industrial installations where natural gas, LPG or other non-corrosive gases (dry
gases) are used. The FRG/2MBC versions (COMPACT) are preferable for small applications (up to 25 m
Reference standards: EN 88-2 – EN 13611.
They can be equipped with the following safety devices and accessories according to the system requirements:
• downstream overpressure shut off device (OPSO): stops supply when the regulator outlet pressure exceeds
the setting value of the device. The OPSO device is always present on these devices.
• downstream minimum pressure shut off device (UPSO): stops supply when the regulator outlet pressure
drops below the setting value of the device. It also intervenes in the event of an upstream power failure. They can also be
supplied without the UPSO device.
• relief valve: discharges small gas flows outwards if overpressure occurs downstream of the regulator. This discharge
can be conveyed outwards if the installation is in a poorly ventilated environment. They can also be supplied without the
relief valve.
• outlet pressure socket.

1.2 - KEY TO SYMBOLS

DANGER: In the event
of inobservance,
may cause damage to
property.

1.3 - QUALIFIED STAFF

These are people who:
• Are familiar with product installation, assembly, start-up and maintenance;
• Know the regulations in force in the region or country pertaining to installation and safety;
• Have first-aid training.
1.4 - USING NON-ORIGINAL SPARE PARTS
• To perform maintenance or replace spare parts (e.g. spring, filter element, etc.) ONLY manufacturer-recommended parts
can be used. Using different parts not only voids the product warranty, it could compromise correct device operation.
• The manufacturer is not liable for malfunctions caused by unauthorised tampering or use of non-original spare parts.

1.5 - IMPROPER USE

• The product must only be used for the purpose it was built for.
• It is not allowed to use fluids other than those expressly stated.
• The technical data provided on the rating plate must not, under any circumstances, be exceeded. The end user or installer is in
charge of implementing correct systems to protect the device, which prevent the maximum pressure indicated on the rating plate
from being exceeded.
• The manufacturer is not responsible for any damage caused by improper use of the device.
Madas Technical Manual - 5|5.1b - REV. 1 of 20
DANGER: Inobservance may cause
this damage to property, people and/or pets.
Feb 2020
th
11
FRG/2MBC(Z-F-R-M) - FRG/2MB(Z-F-R-M)
/h).
3
ATTENTION: Attention
is drawn to the technical
details intended for
qualified staff.