Furnace Balanced Flat Seat®

• Lighter weight
• Strong, durable construction
• Virtually eliminates camber and stretching

Another advancement of the Flat Seat^® design is the Furnace Balanced Flat Seat^® (FBFS) belt.  We revolutionized furnace belts by taking our patented Flat Seat design and enhancing it for use in high temperature applications. Designed to replace the old-fashioned Double Balanced belting, our FBFS belt weighs far less without compromising strength and durability.  FBFS has no excess wire to stretch or camber (wavy distortion across the belt width), like Double Balanced belts where stretch is an on-going problem.

The antiquated Double Balanced design’s thick, overlapping spirals lengthen and flatten during each cycle through a furnace due to the excess wire. The result is stretch and camber which prevents the belt from hinging and tracking properly, eventually destroying the belt itself.

Stretch is an ongoing and costly problem.  It must be removed and this requires frequent downtime, incurring additional expense beyond just the purchase cost of the belt.  Additionally, all of the excess wire in a Double Balanced furnace belt is useless weight that must be heated and cooled with each cycle.  This leads to useless energy consumption and increased energy cost, again adding more expense beyond the purchase price of the belt.  With no excess wire to stretch and camber the simple, efficient, single wire spiral design of our FBFS belt requires less energy to operate, stretches less, reduces downtime, and makes splicing easier. 

Numerous edge treatments are available for finishing furnace belts. Our skilled craftsmen have extensive experience producing both the knuckled and welded edge and the trimmed and welded edge. Other special edge treatments are available if needed. 

The choice of the appropriate alloy is an important decision which will affect belt life and cost. There is often a trade-off between the two, and the decision will be based on the historical experience with the belting used in your application, where the only variable has been the alloy. Determine the alloy for use based on the temperature extremes used in processing. For instance, in temperatures of less than 1600°F, T314 stainless steel would be an economical choice. However, this belt would not be as resistant to carburization. For a complete list of details, refer to our FBFS alloys list.

T 314 stainless steel offers economy, oxidation resistance and high-temperature strength. The high silicon content is very important for adding adhesion to the high temperature scale. It is used in temperatures up to 1,600°F (870°C) in air and up to 2,100°F (1150°C) in protected environments.

35-19CB is the next step in oxidation resistance. It is more carburization-resistant than T 314 in many applications. This stabilized alloy is proven superior in resisting corrosion and carbon embrittlement. 35-19CB is not commonly susceptible to preferential oxidation (green rot). It is used in temperatures up to 1,800°F (980°C) in air and up to 2,150°F (1,200°C) in protected environments.

80-20CB, Inconel 601 and Tophet 30 are additional choices of high temperature alloys.  These alloys solve specific problems caused by temperature, atmosphere, and process.

Through decreased downtime, energy savings, and with fewer belt replacements, each FBFS belt you order helps pay for itself.  Years of experience in working with customers in high temperature industries gives us the advantage in helping you choose your best furnace belt.  Contact us today to make sure you are using the most economical and appropriate mesh and alloy for your application.

Key industries: Automotive

Key applications: Annealing Furnaces, Brazing Furnaces, Foundry Applications, Sintering Furnaces, Wrapper Belts