LOCKED OPEN AND LOCKED CLOSED As the item that had to be closed is a valve in one location, the reason for having a keyless method of opening was not necessary and the wire was changed to a chain and ...
Locking Device
Car Sealed Open And Car Sealed Closed for Valve
During recent years more attention has had to be given to the safety of piping systems because of large-scale disasters and the harsher off- shore environments where oil and gas facilities are now con ...
Mechanical Interlocking for Valve
As plants grew in size and processes became more complex, operat- ing at higher temperatures and pressures in harsher environments, the need for a more sophisticated method of locking became more impo ...