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10
Madas Technical Manual
- 7|7.3 - REV. 0 of 1
st
Apr 2019
MVB/1 MIN
2.0 - TECHNICAL DATA
• Use
: non-aggressive gases of the three families (dry gases)
• Ambient temperature (TS)
: -15
÷
+60 °C
• Maximum operating pressure
: 500 mbar
• Trigger pressure range
: see table 2
• Closing time
: < 1s
• Rp Threaded connections
: (DN 20 - DN 25 - DN 32 - DN 40 - DN 50) according to EN 10226
• Flanged connections that can be coupled
to PN 16 flanges
: (DN 25* - DN 32 - DN 40 - DN 50 - DN 65 - DN 80 - DN 100 - DN 125 - DN 150)
ISO 7005 / EN 1092-1
• NPT threaded or ANSI 150 flanged connections : on request
• In compliance with
: ATEX Directive 2014/34/EU
* DN 25 with swivel flanges.
3.0 - COMMISSIONING THE DEVICE
3.1 - OPERATIONS PRIOR TO INSTALLATION
• It is necessary to close the gas upstream of the valve 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;
• Valve pipes and insides must be clear of any foreign bodies;
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 being
installed exceeds the weight allowed, suitable mechanical equipment and adequate slings must be used. Necessary
precautions must be taken during the handling phases in order not to damage/ruin the external surface of the device.
• In accordance with EN 161, a suitable filter must be installed upstream of a gas closing safety device;
• 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 valve is installed near other devices or as part of an assembly, compatibility between the valve and this other
device must be evaluated beforehand;
• Provide protection against impact or accidental contacts if the valve is accessible to unqualified personnel.
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 top part of the valve as a lever to help you screw it on, but only use the specific tool;
• The arrow, shown on the body (
6
) 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;
