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COMMISIONING
For installation on the methane gas distribution network, the risk of formation of explosive mixtures (gas / air) inside
the pipes must also be considered. After installation, check that the inlet and outlet on-off valves, any by-pass and
the relief valve are all closed. Before proceeding with commissioning, it is recommended to check the external
tightness of the system, checking for any gas leaks / leaks. In the event of a gas leak, using a soapy solution, bubbles
or swellings will form. Although the devices are delivered prepared from the factory, it is possible that these values
may undergo possible deviations during transport (due to vibrations, etc.), it is therefore advisable to check the
settings according to the procedures listed below.
During commissioning, the risks associated with any discharges into the atmosphere of flammable or noxious gases
from sources other than the valve itself must be assessed.
During commissioning, the following steps must be carried out:
It is recommended to operate the opening and closing valves very slowly because too
rapid maneuvers could damage the seismic valve.
1. Commissioning must be carried out by suitably trained personnel.
2. After all safety checks, slowly open the upstream shut-off valve until pressure
stabilization is achieved;
3. After completing the hydraulic connections, carry out the required tests to check the
tightness of the discontinuity points of the gas circuit.
4. Once the product installation is complete, proceed with the reset. (See page 9 for reset
instructions).
5. Once the seismic valve has been armed, replace the pin covering the reset stem
correctly screwed backwards on the body of the device. (In this way the reset stem of
the device is protected from deterioration of the rubber seals due to the deposit of
dust, water and / or other corrosive agents, extending the useful life of the device).
6. Slowly open the downstream on-off valve until pressure stabilization is reached and
carry out the safety checks relating to the valve outlet seal;
7. Having checked that there are no gas leaks, the valve remains in operation armed for its purpose.
8. It is of fundamental importance that the valve remains mounted correctly with the bubble viewer in the correct
position, verifying over time any deviations due to subsidence of the ground.
9. If the valve is installed improperly, it could cause the failure or intentional or unjustified interruption of the
gas supply service
.
MAINTENACE
A specific periodic maintenance of the device is not necessary if correctly installed and if corrosive gases are not
used.
P a g e .
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