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Furnace Rolls | Gas Furnace Types

Furnace rolls work in some of the harshest environments. They will typically see temperatures in excess of 500 degrees Fahrenheit for years at a time. Materials used are made to withstand this criteria, so they are also difficult to machine. Let’s take a look at some of the different types of gas furnaces that furnace rolls are found in.

Modulating (or Variable Speed) Furnace

This furnace adjusts its flame incrementally so that the true temperature never varies more than 1 or 2 degrees from the thermostat’s target temperature. In terms of comfort, it is the most comfortable gas furnace you can buy. Modulating gas furnaces are among the most energy-efficient furnaces and are rated at 98% efficiency.

Two-Stage or Dual-Stage Furnace

The two-stage furnace is not as complex than the modulating furnace but better than the single stage furnace. Rather than a simple on/off operation, its flame can be on/high, on/low, or off. Adding this second flame setting makes a dramatic difference in energy costs.

Single Stage Furnace

With a single stage furnace, the gas flame is either on or off. Because of that, the furnace waits for the temperature in the house to get cold before firing on. Then, the furnace rams the house full of heat until the thermostat shuts the system down.

Are You Looking for Furnace Rolls?

No matter what the use, Ferralloy offers high-quality furnace rolls at competitive prices for your next project. If you are looking for furnace rolls, contact us today to learn more.


What can furnace rolls do?

What Are Radiant Tubes?

If you have a project that requires parts to function in extreme heat above 1,200 °F (670 °C), you need a heat resistant casting. It’s important to know, however, that all heat resistant products are not the same. There are countless factors that go into deciding which component is best for your specific industry and need. Radiant tubes are one of the many types of heat resistant products. Keep reading to find out if it can benefit your project!

What are Radiant Tubes?

The performance of a heating system depends not only on the furnace burner, but also on the radiant tubes. The aim of the radiant tubes is to transfer heat to the load through irradiation. Heat exchange occurs when the combustion fumes are generated by the burner and then are conveyed through the tube. Various sizes and shapes of different heat resistant materials are used for these tubes depending on the specific need, service temperature, and furnace atmosphere. 

Why are They Used?

Regardless of their shape or size, they are used to ensure no contact between the flames from the burner and the material in the furnace occurs. Radiant tubes are also used because they are able to reach process temperatures up to 2000 °F (1200 °C) and maintain temperature uniformity.

What are their Applications?

Radiant tubes are normally used in applications that require the furnace atmosphere to remain stable and without any chemical changes. Specific industries that often require radiant tubes include the steel industry, chemical industry, and ceramic industry.

Whenever you need to count on radiant tubes to provide consistent heat transfer, you can count on Ferralloy Inc. No matter your industry or application, we can provide you with high-quality parts that are competitively priced and delivered on time. Give us a call at 440-250-1900 or visit our foundry online to learn more about how Ferralloy Inc. can help with any of your metalworking needs!

What are radiant tubes?