Class A Ovens

The National Fire Protection Association (NFPA) requires specially designed “Class A” ovens for direct, gas-fired equipment, or for processing products involving flammable solvents, volatiles or combustible materials. A Class A oven must have a forced exhaust, a method to prove airflow, a purge timer and an explosion relief area. Despatch Class A ovens are specifically designed to meet NFPA 86 requirements. A Despatch Class A oven comes complete with a pressure relief panel, purge timer, and exhaust fan.

The LFC Class A bench-top oven is specially designed to meet NFPA 86 requirements for applications that include flammable solvents or large amounts of moisture removal. They include a pressure relief panel, purge timer and exhaust fan. The LFC uses horizontal recirculating airflow to ensure uniform temperatures throughout the oven. A high-volume fan circulates air through perforated, stainless steel walls to create a constant horizontal airflow across all sections of the oven. The result is proven reliability in demanding production and laboratory applications such as curing, drying, sterilizing, aging and other process-critical procedures.

Despatch TFD Class A Ovens are specifically designed to meet NFPA 86 requirements for applications that include flammable solvents or large amounts of moisture removal. These oven comes complete with a pressure relief panel, purge timer, and exhaust fan. The large size and maximum 343℃ (650℉) temperature of the TFD walk-in ovens make these models a perfect choice for curing and drying large-size or large batch components. The interior is aluminized steel and features a plate floor with truck tracks for easy accessibility into the chamber.

The Despatch PC Series Conveyor Ovens are designed for process versatility and reliability. A Class A option is available to meet NFPA 86 requirements. These conveyor ovens achieve superior temperature uniformity in all interior parts due to high-volume, vertical down airflow. The continuous belt design is ideal for large quantities of similar work pieces being processed.

The RFD Reach-In Oven offers a variety of chamber sizes, features high airflow for fast heating, and is available as a Class A oven for processes involving volatiles. These ovens are commonly used for pre-heating steel, metal stress-relieving and other heavy industrial heat treating processes.

The RFF Class A Furnace is specifically designed to meet NFPA 86 requirements. It features horizontal recirculating airflow to ensure exceptional temperature uniformity of +/- 5.6℃ at 538℃. These high performance furnaces deliver temperatures up to 538℃ (1000℉) and are great for such processes as annealing, aging, stress relieving and other process critical applications.

The TFF Walk-In and Truck-In Furnaces are robust for heavier industrial processes at higher temperatures. The TFF models are Class A and meet NFPA 86 requirements for applications such as finish baking, bonding and those involving moisture or fume removal. Horizontal, recirculating air flow creates precise, consistent temperature uniformity throughout the furnace.

If you process a flammable product or remove combustible vapors from a product in an industrial oven, you will need a Class A oven that meets NFPA 86 requirements. Flammable volatiles that pose a potential explosion or fire hazard can originate from paints, powders, inks, and adhesives. Potential threats may also originate from finishing processes, such as dipped, coated, sprayed, and impregnated materials as well as from polymerization or other molecular rearrangements. Combustible materials include substrate material, wood, paper, plastic pallets, spacers and packaging materials.

Inadequate training of operators, lack of proper maintenance, and improper application of equipment can cause serious injury. For the latest safeguards required to minimize explosion hazards, get a copy of NFPA 86 Standard for Ovens and Furnaces, 2019 Edition, from the National Fire Protection Association (www.nfpa.org).