The PT Series are ceramic fiber lined pit furnaces. They can be designed for either air or controlled atmosphere applications. They are designed to be located in a pit in the floor. They load from the top. They can be electric or gas fired. Various kinds of element systems are used for the electric versions. Each one is custom designed for an application. Specifications are per detailed quotation. Typical applications include carburizing, carbonitriding, and tempering of long shafts. Complete atmosphere control systems are available. Temperatures to 2200°F (1200°C) are available. Uniformity of +/-10°F (+/-5°C) is possible.