Madas RG/2MC User manual

MADE IN ITALY
II 2G - II 2D
0497
REGOLATORE DI PRESSIONE PER GAS
GAS PRESSURE REGULATOR
REGULATEUR DE PRESSION POUR GAZ
REGULADOR DE PRESIÓN PARA GAS
RG/2MC - FRG/2MC
CHAPTER
4.1e
SEC TION
4
Madas Technical Manual - 4|4.1e - REV. 0 of 1th May 2018 - RG/2MC - FRG/2MC
IT EN FR ES
Range pressione di esercizio
Operating pressure range
Plage de pression de fonctionnement
Rango de la presión de funcionamiento
Pe: 1÷2 bar
Attacchi filettati / Threaded connections
Raccords filetés / Conexiones roscadas
DN 15 - DN 20 - DN 25 - DN 32 - DN 40 - DN 50
Attacchi filettati a 90°/ Threaded connections at 90°
Raccords filetés à 90° / Conexiones roscadas a 90°
DN 15 - DN 20 - DN 25 - DN 32 - DN 40 - DN 50
Attacchi flangiati/ Flanged connections
Raccords à brides / Conexiones embridadas
DN 25* - DN 32 - DN 40 - DN 50 - DN 65 - DN 80 - DN 100
* su richiesta
con flange girevoli
* with swivel flanges
on request
* sur demande
avec brides tournantes
* bajo petición
con bridas locas
Norma di riferimento / Reference standard
Norme de référence / Patrón de referencia EN 88-2
In conformità a
In conformity with
Conforme a
Conforme
Direttiva PED
2014/68/UE
PED Directive
2014/68/EU
Directive PED
2014/68/UE
Directiva PED
2014/68/UE

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Madas Technical Manual - 4|4.1e - REV. 0 of 1th May 2018RG/2MC - FRG/2MC
INDICE INDEX INDEX ÍNDICE
pag.
Italiano ........................................................................................................................................................3
English ........................................................................................................................................................10
Français ......................................................................................................................................................17
Español .......................................................................................................................................................24
Disegni - Drawings - Dessins - Diseños ............................................................................................................32
Dimensioni (tabella 1a - 1b) ...........................................................................................................................41
Dimensions (table 1a - 1b) .............................................................................................................................
Dimensions (tableau 1a - 1b) ..........................................................................................................................
Dimensiones (tabla 1a - 1b) ..........................................................................................................................
Caratteristiche molle di regolazione (tabella 3) ....................................................................................................43
Regulation spring data (table 3) .......................................................................................................................
Caracteristiques des ressorts de reglage (tableau 3) ...........................................................................................
Características muelles de regulación (tabla 3) ...................................................................................................
Diagramma - Diagram - Diagramme - Diagrama Δp.............................................................................................44
Codifica prodotto / Product encoding / Codification du produit / Codificación del producto.......................................46

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RG/2MC - FRG/2MC Madas Technical Manual - 4|4.1e - REV. 0 of 1th May 2018
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 by using 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) when the
inlet pressure (Pe) and/or the flow rate (Q) changes. The compensated obturator ensures precision when adjusting the outlet
pressure (Pa) even in the case of high and sudden variations in the inlet pressure.
It is fitted with:
• a spring to adjust the outlet pressure;
• a safety membrane;
• an output pressure test nipple (with some exceptions) to control the outlet pressure (Pa). On some models the pressure
test nipple is also present on the input;
It can also be supplied with a built-in filtering element (FRG/2MC models).
Available 90° connections for threaded connections from DN 15 to DN 50.
Reference standards: EN 88-2 – EN 13611. Component for industrial use on industrial sites.
1.2 KEY OF SYMBOLS
ATTENTION: Attention
is drawn to the technical
details intended for
qualified staff.
DANGER: In the event of
inobservance, this may cause damage
to tangible goods, to people and/or pets.
DANGER: In the event
of inobservance, this may
cause damage to tangible
goods.
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;
•Are trained in first aid.
1.4 USING NONORIGINAL SPARE PARTS
•To perform maintenance or change 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 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 set forth 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.

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RG/2MC - FRG/2MCMadas Technical Manual - 4|4.1e - REV. 0 of 1th May 2018
2.0 TECHNICAL DATA
• Use : non-aggressive gases of the three families (dry gases)
• Ambient temperature (TS) : -15 ÷ +60 °C
• Operating pressure range (Pe) : 1÷2 bar
• Accuracy class : AC10 (P2 ± 10%)
• Closing pressure class : SG30 (P2 + 30%)
• Mechanical resistance : Group 2 (according to EN 13611)
• Rp threaded connections in line : (DN 15 - DN 20 - DN 25 - DN 32 - DN 40 - DN 50) according to EN 10226
• Rp threaded connections at 90° : (DN 15 - DN 20 - DN 25 - DN 32 - DN 40 - DN 50) according to EN 10226
• Flanged connections that can couple with
PN 16 flanges :
(DN 25* - DN 32 - DN 40 - DN 50 - DN 65 - DN 80 - DN 100) ISO 7005 / EN 1092-1
• NPT threaded or ANSI 150 threaded connections : on request
• Filter element (only models FRG/2MC) : filtering 50µm
• In compliance with : PED Directive 2014/68/EU - ATEX Directive 2014/34/EU
* DN 25 with swivel flanges on request.
2.1 MODEL IDENTIFICATION
RG/2MC: Pressure regulator for gas without filter - (connections in line)
FRG/2MC: Pressure regulator for gas with built-in filter - (connections in line)
RG/2MCR: Pressure regulator for gas without filter - (connections at 90° see figure 2 and 4)
FRG/2MCR: Pressure regulator for gas with built-in filter - (connections at 90° see figure 2 and 4)
3.0 COMMISSIONING THE DEVICE
3.1 OPERATIONS PRIOR TO INSTALLATION
•It is necessary to close the gas upstream of the device prior to installation;
•Make sure that the line pressure DOES NOT EXCEED the maximum pressure declared on the product label;
•Protective caps (if any) must be removed prior to installation;
•The pipes and inside of the device must be clear of any foreign bodies;
•IMPORTANT: to avoid possible pumping and/or disturbances in the gas flow, a straight pipe section equal to at least 5
DN must be installed (downstream of the regulator).
•IMPORTANT: install manual gas closing devices (e.g. ball valves) upstream and downstream of the regulator to protect
it from any pipe leak test;
If the device is threaded:
•make sure that the pipe thread is not too long, to prevent damaging the body of the device when screwing it on;
If the device is flanged:
•make sure the inlet and outlet counter-flanges are perfectly coaxial and parallel in order to prevent unnecessary
mechanical stress to the body. Also calculate the space to insert the seal gasket;
•With regard to tightening operations, equip yourself with one or two calibrated torque wrenches or other controlled locking
tools;
•The safety regulations on handling loads in force in the country of installation must be complied with. If the device to
be installed exceeds the weight allowed, suitable mechanical equipment and adequate slings must be used. Necessary
precautions must be taken during the handling phases so as not to damage/ruin the external surface of the device.
•If the regulator is not fitted with a filter, it is advisable to install an adequate filter upstream;
•With outdoor installation, it is advisable to install a protective roof to prevent rain from oxidising or damaging parts of the
device.
•According to the plant geometry, check the risk of an explosive mixture arising inside the piping;
•If the regulator is installed near other devices or as part of an assembly, compatibility between the regulator and
these devices must be evaluated beforehand;
•Provide a protection against impacts or accidental contacts if the device is accessible to unqualified personnel.

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RG/2MC - FRG/2MC Madas Technical Manual - 4|4.1e - REV. 0 of 1th May 2018
3.2 INSTALLATION (see example in 3.4)
Threaded devices:
•Assemble the device by screwing it, with the due seals, onto the plant with pipes and/or fittings whose threads are consistent
with the connection being attached.
•Do not use the neck of the top cover (4) as a lever to help you screw it on, only use the specific tool;
•The arrow, shown on the body (11 ) of the device, needs to be pointing towards the application;
Flanged devices:
•Assemble the device by flanging it, with the due seals, onto the plant with pipes whose flanges are consistent with the
connection being attached. The gaskets must be free from defects and must be centred between the flanges;
•If, after installing the gaskets, there is still an excessive space in between, do not try to reduce the said gap by excessively
tightening the bolts of the device;
•The arrow, shown on the body (11 ) of the device, needs to be pointing towards the application;
•Insert the relative washers inside the bolts in order to prevent damage to the flanges during tightening;
•When tightening, be careful not to “pinch” or damage the gasket;
•Tighten the nuts or bolts gradually, in a “cross” pattern (see the example below);
•Tighten them, first by 30%, then by 60% and finally 100% of the maximum torque (see the table below according to
EN 13611);
Diameter DN 25 DN 32 DN 40 DN 50 DN 65 DN 80 DN 100
Max. torque (N.m) 30 50 50 50 50 50 80
•Tighten each nut and bolt again clockwise at least once, until the maximum torque has been achieved uniformly;
•Common procedures (threaded and flanged devices):
•The regulator is normally positioned before the utility. Primarily evaluate the possibility of installing the regulator as shown in
the installation example in 3.4, namely in an optimal position pos. a(see figures below);
•Should this not be possible, the following factors must be considered:
1. if installed as shown in pos. bthe maximum Pa value declared on the rating plate could be less by a few mbar.
NOTE: for versions with 90° connections, it is recommended to install a filter after the regulator that protects it from
debris that could enter from downstream from above (due to gravity);
2. if installed as shown in pos. cthe life span of the product could be shorter than the duration that could be obtained
if installed in the optimal position a;
3. if installed as shown in pos. d, besides that indicated for pos. cit is recommended to install a filter after the
regulator that protects it from debris that could enter from downstream from above (due to gravity);
Connections in line 90° connections (closed line output)
a b dc a b c
•During installation, avoid debris or metal residues from getting into the device;
•To guarantee mechanical tension-free assembly, we recommend using compensating joints, which also adjust to the pipe’s
thermal expansion;
•If the device is to be installed in a ramp, it is the installer’s responsibility to provide suitable supports or correctly sized
supports, to properly hold and secure the assembly. Never, for any reason whatsoever, leave the weight of the ramp only on
the connections (threaded or flanged) of the individual devices;
•In any case, after the installation check the tightness of the system, avoiding to subject the membrane of the regulator
(therefore, the downstream pipe section) to a pressure higher than 300 mbar;