Superior Compartment Access Interlock Unit
Printable Technical Specifications
Superior Compartment Door Interlocks are manufactured in a number of different
types for the Interlocking of compartment or cell doors, gates, access hatches,
manways, access doors, safety fences, etc. This prevents access to enclosures,
hazardous machinery, high voltage areas, automatic robotic equipment, high or low
temperature areas, chemically hazardous vessels, dangerous gangways, compartments
or other restricted areas, etc. until a key, signifying that entry is safe, is
inserted in the Interlock.
An essential feature of all Superior compartment door Interlocks is the key
retaining feature which prevents the removal of the key from the Interlock until
the doors are returned to the closed position. The removal of the key locks the
door closed. The key, when removed, gives evidence that the compartment door is
In Superior Compartment Door Interlocks, the key retaining function is
accomplished by means of a set of tumblers built into the interlock, which require
that a prong shaped device known as a bolt eye, be introduced into the slots of
the Interlock unit. Upon removal of the key from the Interlock the bolt eye is
securely locked in the Interlock.
In the usual installation, the Interlock is mounted on the door and the bolt
eye is mounted on the doorframe or jam. For some applications this can be
reversed. When the Interlock is mounted this way, and the key of the Interlock
is removed, the door is positively locked closed.
The most commonly used B-857 compartment door Interlock is the End Mounted
type. This unit with our Bolt Eye Chain adapts to many industrial applications
including those where poor alignment of door and frame exist. Flush and Sub
mounting options are available. Please contact our factory for details or
The Superior type B-857 access interlock is available in our standard alloy
die-cast or with the lock cylinder totally protected by 300 series Stainless
Steel for harsh and high temperature applications such as precipitators,
baghouses, scrubbers, petrol-chemical facilities, food process and packaging
facilities, robotic welding and assembly, etc. Please see our cut sheet for
specifications or contact our factory for details or recommendations.
Shown above, is the Superior Stainless Steel, Type B-857,
end mounting door interlock. The stainless steel interlock has a chain type
bolt eye; plated lock cylinder with a stainless steel dust cover (weldable
mounting plate available). The door lock is for use in harsh environments
found in electrostatic precipitators and chemical plants.
More Info on Products: