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Castell Safety - Trapped Key Safety Interlocks, Lockout Tagout Equipment and Drive-away Prevention
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Castell Safety - Trapped Key Safety Interlocks, Lockout Tagout Equipment and Drive-away PreventionCastellApplications

Applications - Valving - Valve Offload Safety System

Product Usage: MBV

System Requirement

The client needed to ensure that only one of the manifold 'offload' valves could be operational at any one time and that the process could only be carried out under a 'Permit to Work' scheme.

Condition 1

Supply valve and the manifold 'offload' valves are locked closed with the process control key held in the room. To initiate an off load sequence the operative reports to the control room to obtain a permit to work certificate, on issue, the operator is issued the Castell 'A' Key,



Condition 2

The Castell 'A' Key is inserted into the supply valve MBV interlock. Insertion of the key allows the valve to be operated from the closed position. With the valve open, the Castell 'B' Key can be removed, locking the valve open. The 'B' Key is the taken to the desired offload valve. Insertion of the 'B' Key will allow the opening of the valve. Whilst the valve is open, the key cannot be released.

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