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13
Madas Technical Manual
- 4|4.2c - REV. 0 of 10
th
Sep 2019
RG/2MBLZ
2.0 - TECHNICAL DATA
• Use
: non-aggressive gases of the three families (dry gases)
• Ambient temperature (TS)
: -20 ÷ +60°C
• Max operating pressure :
0.5 bar
• Safety shut offs closing time
: < 1 s
• Class :
A=(P2 ± 15%)
• Overpressure shut off accuracy unit
: AG=10
• Closing pressure class
: SG=30
• Relief valve
: tested according to the indications in EN 334
• Connecting the vent
: G 3/4
• Mechanical strength
: Group 2 (according to EN 13611)
• Flanged connections that can couple with PN 16 flanges : (DN 65 - DN 80 - DN 100) ISO 7005 / EN 1092-1
• ANSI 150 flanged connections
: on request
• In compliance with
: ATEX Directive 2014/34/EU
2.1 - MODEL IDENTIFICATION (for configurations see page 45 - 46)
RG/2MBLZ:
Pressure regulator - with safety shut-offs
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);
• install manual gas closing devices (e.g. ball valves) upstream and downstream of the regulator to protect it from any
pipe leak test;
• do consider that if the regulator is equipped with a relief valve, the latter is suitable for small quantities of gas to be
discharged and CANNOT replace the relief valve installed separately as a specific device;
• 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;
• 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.
