Key to pig keeping safety

The incorrect loading and unloading of pipeline inspection gauge (PIG) launchers and receivers can have catastrophic consequences. A specific sequence of valves must be operated, pressurising and depressurising the PIG chamber in the same order every time to avoid damage to equipment and injury to personnel. To protect this process, Smith Flow Control offers a full line of key interlocks.

The interlocks are single or dualkeyed mechanical locking devices used to control the sequence in which process equipment may be operated.

Using a 'key transfer' principal, operational control over safety-critical processes can be ensured.

SFC interlocks are constructed of stainless steel and lubricated for life.

Each interlock is quickly installed on any standard sized valve or associated equipment with no modifications