A heavy-duty walk-in oven passed the temperature uniformity requirements to meet BAC 5621 Class 1 Furnaces and Instrumentation Type D specifications. Wisconsin Oven Corp. shipped the curing oven to a composite manufacturer.
The two-zone indirect-gas-fired unit has a maximum operating temperature of 450°F (232°C) and can heat 2,000 lb of material from 70 to 350°F (21 to 177°C) at an average rate of 10°F (5.5°C) per minute. It utilizes a horizontal airflow configuration to maximize heating rates and uniformity. Three guaranteed temperature uniformity tests were performed to ±5°F (±2.7°C), each at setpoints of 150, 250, 350 and 400°F (66, 121, 177 and 204°C) to meet specifications. All tests were conducted in an empty oven chamber under static operating conditions.
The industrial oven includes three vertical-lift, electrically operated doors. When in the closed/lowered position, the center door separates each zone into individual chambers. When in the raised position, the center door allows the customer to utilize one large heating chamber. Each zone’s exhaust blowers included variable-frequency drives (VFDs) and modulating dampers to allow a lowered exhaust rate during heating.