MT Modu-Lok™
- an interlocking suspended refractory system for covers and curtains for glass furnaces.
The Modu-Lok system uses prefired refractory to provide a structure of uniform density.
Hanger and filler brick have structural, load-bearing treads on two sides. Materials are chosen
to suit the particular application, for example, fused AZS may be best suited for a doghouse curtain,
whereas mulite refractory is chosen for a canal cover.
Simplicity
Often covers or curtains--many with complex configurations--are built with two parent shapes.
Versatility
Horizontal covers, vertical curtains or combinations of the two can be made from the same base shapes.
Stability
There are 1/2" (12 mm) treads on both the hanger and filler bricks to "lock" the cover together.
Thermal Efficiency
The Modu-Lok® construction allows for insulated or non-insulated systems, depending on the requirements.
Metallic Support
The hanger bricks are suspended using metallic anchors, while the sides are held in place with metallic plates.
Metallics are clear of insulation, which adds to service life. Metallics can be made as stampings or castings in materials to
suit particular conditions.
MT Modu-Lok® Waist Covers
The Modu-Lok system has been used in waist area covers for over 3 decades. The Merkle waist covers can be moved so a stirrer or
cooler can be inserted. The superior refractory used in Merkle waist covers permits some thermal cycling of the waist covers. Steel frames are
supplied with the refractory and metallics. The steel frames are normally water cooled.
 MT Modu-Lok® Waist Curtains
Waist curtains are an alternative to shadow walls to separate the melter from the refiner. As with all
Modu-Lok® systems, the metallics and support steel are kept clear of, or a safe distance from, the heat of the
furnace. As with the waist covers, water-cooled steel frames are supplied.
MT Modu-Lok® Canal Covers
Special structures made using MT Modu-Lok® shapes
Certain furnace designs call for special structures. The flexibiltiy of the MT Modu-Lok construction allows special shaped
covers and curtains, such as donkey walls or complex crutch arches, to be constructed using the Merkle MT Modu-Lok refractory shapes.
Merkle can provide a solution for almost any complicated design challenge.
Merkle has supplied over 500 covers and curtains for the glass industry since 1972. Let our experience and technical superiority
work for you. Please contact us about your upcoming construction or rebuild or if you have any questions about the
Merkle Modu-Lok® system.
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