Arla Foods has installed Castell’s
interlocking system, Salvo, on 16
loading bays at its state-of-the-art
dairy in Leeds.

Shunters reverse their trailer up to
the relevant loading bay, collect a
Salvo Susie lock from a storage box
and fit it to the trailer’s emergency air
line coupling.With the trailer now
immobilised, the shunter takes the
key released from the end of the Susie
and inserts it into the Salvo control
panel inside the warehouse. Turning
the key switches on internal beacons
and allows the bay door to be raised.

The key remains trapped in the
control panel while the door is open.

Once loading or unloading is
complete, the sequence is reversed.