11
IT
EN
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Madas Technical Manual
- REV. 0 of 10
th
May 2018
RG/2M - FRG/2M
2.0 - TECHNICAL DATA
• Use
: non-aggressive gases of the three families (dry gases)
• Ambient temperature
: -15 ÷ +60 °C
• Maximum operating pressure
: 500 mbar
• Class
: A (P2 ± 15%)
• 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 flanged connections : on request
• Filter element (only models FRG/2M)
: filtering
50
µ
m
• In compliance with
: Regulation (EU) 2016/426 (Appliances burning gaseous fuels)
ATEX Directive 2014/34/EU
* DN 25 with swivel flanges on request.
2.1 - MODEL IDENTIFICATION
RG/2M:
Pressure regulator for gas without filter
- (connections in line)
FRG/2M:
Pressure regulator for gas with built-in filter
- (connections in line)
RG/2MR:
Pressure regulator for gas without filter
- (connections at 90° see figure 2 and 4)
FRG/2MR:
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.
