Boiler manufacturer Ideal Heating has
upgraded safety procedures at its Hull
site with the introduction of interlocking
systems from Castell. The
heating specialist has installed safety
switches and access interlocks on 10
machines in its foundry blowing area.

The blowing area turns out sandbased
moulds for casting heat
exchangers used in the company’s
boilers.Waste sand from the
production process tended to clog up
the previous safety system, but
Castell’s heavy-duty KSE20 multi-key
electrical switches and AI access
interlocks have been unaffected by the
demanding environment.

When maintenance of a mouldmaking
machine is required, the
operative removes the primary key
from the electrical switch. This action
changes the status of the electrical
supply to the machine to a safe
condition and enables the release of
the two secondary keys. These keys
are then used to unlock the interlocks
on the machine’s access doors. The
guards can only be opened when the
electrical supply has been switched to
a safe condition.