Lockout Shutoff Valve [1]
A shutoff valve [2] designed so that it can be secured in the closed position.
See also PEI/RP700 [3].
A shutoff valve [2] designed so that it can be secured in the closed position.
See also PEI/RP700 [3].
Links
[1] https://testing.pei.org/wiki/lockout-shutoff-valve
[2] https://testing.pei.org/node/343
[3] https://testing.pei.org/node/573