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Roofs, Walls and Bullnoses for Incinerators
Merkle Modu-Lok® system
Merkle International, Inc. supplies structures made using the proprietary Merkle Modu-Lok® system.
The Modu-Lok system utilizes pre-fired refractory shapes along with metallic hangers and structural steel-for support.
These pre-fired shapes generally have a longer installed life and higher resistance to corrosion than plastic or castable systems.
Merkle has extensive experience in suspended refractory systems, dating back to 1973. We work with our customers to find the best long-term solution
for your furnace roof situation. Our staff will work with you to determine the exact refractory quality that fits your process and your budget.
As a supplier of innovative equipment and systems, Merkle is also a problem-solver.
The Best in the Business
Merkle works with its incinerator customers and delivers what the customer needs.
Our scope of supply can include structural support steel supporting our refractory system.
We can also provide fabrication details for that steel, for local fabrication (saving shipping costs).
Our attention to detail has earned Merkle a reputation for customer service with its clients.
In addition to supplying our innovative and highly functional products, we purchase and inspect material, and provide technical support
during installation.
MODU-LOK® - an interlocking suspended refractory system for roofs, walls, bullnoses
and curtains.
 The Modu-Lok system uses pre-fired refractory to provide a lining of uniform density.
Hanger and filler brick have structural, load-bearing treads on all four sides. Materials are chosen
to suit the particular application, e.g. thermal shock-resistant refractory is chosen for applications
with cyclical temperatures; very dense material is chosen for highly corrosive or abrasive atmospheres.
Simplicity
One parent shape can be used for an entire curtain. Two parent shapes are used to build the complete roof or tied-back wall--often
with complex configuration.
Versatility
Support brick can be placed on 4-, 8-, 12-, or 16-inch centers.
Stability
Roof and wall support brick is heavily treaded on all four sides to support maximum number of filler brick.
Curtain bricks have 3 full treads for better bonding and support.
Thermal Efficiency
Modu-Lock roof designs allow for maximum insulation. With hangers on 8-inch centers, the Modu-Lok roof allows for 75% coverage; with
hangers on 12-inch centers, coverage is 84%; with hangers on 16-inch centers, coverage is 88%.
Metallic Support
Design locks metallics on both support brick and steel structures. Metallics are clear of insulation, which
adds to service life. Metallics can be made as stampings or castings in materials to suit particular applications.
Modu-Lok® Suspended Roof
 The Modu-Lok system is used in roofs for high-temperature applications
ranging from chemical incineration to glass making; from metals smelting to mineral processing. The structural treads allow this
flexibility--providing sturdy linings with maximum insulation coverage.
Modu-Lok® Walls
Modu-Lok walls are supplied in tied-back only and suspended and tied-back designs. For high-wear areas and/or taller
walls, the suspended and tied-back construction is recommended. For both designs, the metallics and support steel
are kept a safe distance from the insulation. This aids the cooling of the metallics and lengthens
their life.
MT Modu-Lok® Bullnoses
Modu-Lok bullnose construction provides a roof-to-wall or wall-to-wall transition,
using pre-fired refractory material. This construction is supported by the same sturdy
refractory hanger design used in the roof and walls. The nose is turned with radial-shaped
fillers, and can be designed to turn various angles. This system can be supplied for
different radii, depending on the application.
MT Modu-Lok® Curtains
The MT Modu-Lok construction allows construction of suspended curtains
or baffles. This construction is extremely simple, with the curtains built using only one parent shape.
CMC403 and M203-C Castings, Flange-Lok®
CMC403 and M203-C castings, as well as Flange-Lok® metallics are used
in the Modu-Lok® system.
Please see our data sheets for more information.
CMC403
M203-C
Flange-Lok®
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