These valves, normally usable for the application to the counter, are
equipped with a safety lock with keys for the exclusive use of the user
as required by UNI 7129/2008 Paragraph 4.1, and a key (sold separately)
for use by the manager/administrator. In case of emergency, it’s
possible close the gas flow without the use of the key ensuring a
locking in closing. It’s possible, with the key to the
manager/administrator, to prevent any action by the user.