Ball valves for gas with safety locks
Gas ball valves with locks are commonly utilized in meter applications.
These valves, typically used for meter application, have a safety lock with keys for the sole use of the user and a key (sold separately) for use by the manager/administrator.
In an emergency, the gas supply can be shut off without needing a key, ensuring a locking on closing.
It is also possible to block the user from taking any action by using the manager/administrator key.