Those are valves that cut off the
Flow of natural gas to the home or business whenever there is the
Of an earthquake, so that fires and explosions can be prevented.
These valves are required for a new project for cities of a country
in a earthquake location area.
They must comply with international safety standards and certified
Mr Jose Ivo
Rua Antonio Patricio,1-1 Dto, Lisbon, Lisbon-portugal, Portugal
35 1 963755897
35 1 217979029